ZZ3 Turbo Iroc - Round Three
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:26 AM.
Re: ZZ3 Turbo Iroc - Round Three
im thinking 5psi wouldnt make enough difference to make it lean like that... i did calculations awhile back on swapping some injector sizes and it took a boatload of pressure difference to make a 24# injector flow the same as a 26# injector. might be something to try out yourself? (calculate the flow difference 5-7psi would make)
is the gauge fluctuation a fluke? maybe it actually is the injectors crapping out once they get hot?
is the gauge fluctuation a fluke? maybe it actually is the injectors crapping out once they get hot?
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
i think u have an injector or 2 hanging open causing the fuel presure loss ,causing a false lean condition
if it was truley lean it would have poped in the intake
to high of a fuel presure can also make the injector hang open
intake pop = lean
ex pop = dead rich
contact southbay fuel inectors and see if they will bench test ur current injectors , they can throw them on the flow bench and hold at a high duty cycle and see if they mess up
if it was truley lean it would have poped in the intake
to high of a fuel presure can also make the injector hang open
intake pop = lean
ex pop = dead rich
contact southbay fuel inectors and see if they will bench test ur current injectors , they can throw them on the flow bench and hold at a high duty cycle and see if they mess up
Last edited by project89; Mar 2, 2014 at 07:58 PM.
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
if ur running ms 2 extra u can test urself since it has an injector test function but u would have to rig up a bench with a supply of solvent or water to the injectors , do not use something flammable
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:26 AM.
Re: ZZ3 Turbo Iroc - Round Three
i think u have an injector or 2 hanging open causing the fuel presure loss ,causing a false lean condition
if it was truley lean it would have poped in the intake
to high of a fuel presure can also make the injector hang open
intake pop = lean
ex pop = dead rich
contact southbay fuel inectors and see if they will bench test ur current injectors , they can throw them on the flow bench and hold at a high duty cycle and see if they mess up
if it was truley lean it would have poped in the intake
to high of a fuel presure can also make the injector hang open
intake pop = lean
ex pop = dead rich
contact southbay fuel inectors and see if they will bench test ur current injectors , they can throw them on the flow bench and hold at a high duty cycle and see if they mess up
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
project may have nailed it with the injector hanging open. that makes perfect sense. if these injectors are high impedance, i would go to a low impedance, since you have the megasquirt. (although i dont remember if you have to change jumpers to run low impedance injectors?)
i have prescision turbo low-z injectors in mine and until i tweaked my injector settings ( ones in the manual did not work for these injectors) i had some wierd fueling issues
personally i would stay away from low-z inectors , they have uncoverd an issue with the pcb design that when low-z injectors are in use may cause some electrical noise in other circuts for some ppl
in the future i will be swaping my ms out for an ems pro ecm or ms pro ecm
Joined: Jul 1999
Posts: 12,100
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Re: ZZ3 Turbo Iroc - Round Three
with ms u change a few settings in the tune to enable the use of low -z injectors, if these settings are not spot on u will have issues.
i have prescision turbo low-z injectors in mine and until i tweaked my injector settings ( ones in the manual did not work for these injectors) i had some wierd fueling issues
personally i would stay away from low-z inectors , they have uncoverd an issue with the pcb design that when low-z injectors are in use may cause some electrical noise in other circuts for some ppl
in the future i will be swaping my ms out for an ems pro ecm or ms pro ecm
i have prescision turbo low-z injectors in mine and until i tweaked my injector settings ( ones in the manual did not work for these injectors) i had some wierd fueling issues
personally i would stay away from low-z inectors , they have uncoverd an issue with the pcb design that when low-z injectors are in use may cause some electrical noise in other circuts for some ppl
in the future i will be swaping my ms out for an ems pro ecm or ms pro ecm
-- Joe
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
With the available high imp inj out today i dont see an advantage or need for low z inj
Re: ZZ3 Turbo Iroc - Round Three
i would think the faster acting low impedance injectors would make for a better idle/driveability? didnt he have a set of 65's or roundabouts? not a necessity, but if you have the ability to run them....
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
Thats what i've heard but i have 127's that are turned down to 105 at 40 psi and no issues. Didnt have issue with siemens 80's either. So i'm not convinced in low z for anything unless it makes a difference over 127-160+ lbs hr
Supreme Member
Joined: Jul 2005
Posts: 1,210
Likes: 17
Re: ZZ3 Turbo Iroc - Round Three
Very interesting theory. If you had 60s at 80% dc you would be at roughly 240 lph. At 100% you would breech 300. The question at that point becomes firmware bug holding injectors open vs injectors experiencing an issue. Know anyone with a portable oscope? May not be a bad idea to just check that. But then agai. Where are the super rich symptoms if that is the case?
Joined: Dec 2005
Posts: 6,499
Likes: 31
From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: ZZ3 Turbo Iroc - Round Three
Maybe Im wrong, but if an injector or two hung open, wouldn't only THOSE cylinders go rich while all the rest went lean as the pressure dropped?
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
this is true u would get any cyls with a hung injector flooded with fuel , and the others may not get any fuel depending on what remians for fuel presure
Joined: Jul 1999
Posts: 12,100
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Re: ZZ3 Turbo Iroc - Round Three
Are you firing your injectors once every two crank revolutions? If so, and you have your latency spot on you probably have duty cycles the injectors can deal with at idle.
Right now my 42# injectors are firing 4 times per cycle (two crank revolutions), which makes for very smooth part throttle and throttle transitions, and it even idles. However when I switch to the 50s, the idle pw would be too short and it would go erratic.
The MS also has EAE with lag compensation, which changes the way the injectors fire under certain conditions.
http://msextra.com/doc/ms2extra/MS2-...anual.html#EAE
-- Joe
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
granted i have low-z injectors but i basically had a stock 250hp sbc with the tpi and turbos ontop of it it idled just fine on the 85# injectors
ae enrichment took a while to get right since it only needed very small values , but other then that it acted like it had a set of 24's in it
ae enrichment took a while to get right since it only needed very small values , but other then that it acted like it had a set of 24's in it
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:27 AM.
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
problem is i dont think u will be in the lean condition long enough to make a difference between the primary tubes
if u could rig up some sort of supply to the fuel rail with no flamable fluid u could run the injector test on ms and hold them at a high pulse with and visually see what the injectors do while they spray in the air , i would build a test rig that allows u to control the presure in the rail and do the test while fluctuacting the presure inside ur normal operating range
i understand the pita about the injectors with the tpi but im starting to think it needs to be done , i cant see 2 different pumps being bad , but u are loosing fuel presure , i think u can definatly rule out the pumps , last thing in line to check is the injectors
ms could be holding the injectors open for some reason but i highly doubt it
if u could rig up some sort of supply to the fuel rail with no flamable fluid u could run the injector test on ms and hold them at a high pulse with and visually see what the injectors do while they spray in the air , i would build a test rig that allows u to control the presure in the rail and do the test while fluctuacting the presure inside ur normal operating range
i understand the pita about the injectors with the tpi but im starting to think it needs to be done , i cant see 2 different pumps being bad , but u are loosing fuel presure , i think u can definatly rule out the pumps , last thing in line to check is the injectors
ms could be holding the injectors open for some reason but i highly doubt it
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: ZZ3 Turbo Iroc - Round Three
whens the last time u ohmed all the injectors, i would ohm them cold and after driving around, if the ohms are dropping to low when it gets hot ms wont be able to control them correctly
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
Are you firing your injectors once every two crank revolutions? If so, and you have your latency spot on you probably have duty cycles the injectors can deal with at idle.
Senior Member
iTrader: (1)
Joined: Feb 2000
Posts: 720
Likes: 0
From: Shakopee, Mn
Car: 89 Iroc
Engine: 305TPI
Transmission: T5
Re: ZZ3 Turbo Iroc - Round Three
Why not do what Kyle86 did to test out his injectors? Doesn't look all that difficult to do.
https://www.thirdgen.org/forums/post...8-post119.html
One more link.
https://www.thirdgen.org/forums/post...1-post120.html
https://www.thirdgen.org/forums/post...8-post119.html
One more link.
https://www.thirdgen.org/forums/post...1-post120.html
Last edited by Drkhrse89; Mar 3, 2014 at 03:21 PM.
Re: ZZ3 Turbo Iroc - Round Three
one possible scenario- make sure every piece in the fuel system is identical to turboedtpi's setup, order a new set of injectors, and sell the ones you take out.
i just had a set of 85lb. injectors cleaned and tested. it was $100 for that, and 2 of them are kaput. (they sat in a box for 7-8 years and corroded internally) i have to give the owner a call tonight to see what he wants to do, but i think i want to get a set of 120lb. so we can run it on e85.
i just had a set of 85lb. injectors cleaned and tested. it was $100 for that, and 2 of them are kaput. (they sat in a box for 7-8 years and corroded internally) i have to give the owner a call tonight to see what he wants to do, but i think i want to get a set of 120lb. so we can run it on e85.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:28 AM.
Joined: Dec 2005
Posts: 6,499
Likes: 31
From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: ZZ3 Turbo Iroc - Round Three
one possible scenario- make sure every piece in the fuel system is identical to turboedtpi's setup, order a new set of injectors, and sell the ones you take out.
i just had a set of 85lb. injectors cleaned and tested. it was $100 for that, and 2 of them are kaput. (they sat in a box for 7-8 years and corroded internally) i have to give the owner a call tonight to see what he wants to do, but i think i want to get a set of 120lb. so we can run it on e85.
i just had a set of 85lb. injectors cleaned and tested. it was $100 for that, and 2 of them are kaput. (they sat in a box for 7-8 years and corroded internally) i have to give the owner a call tonight to see what he wants to do, but i think i want to get a set of 120lb. so we can run it on e85.
http://www.feinstein.senate.gov/publ...d-0636b31ca9cd
Re: ZZ3 Turbo Iroc - Round Three
Not super relevant to the thread, but there's a political push to drop the ethanol subsidies and requirements right now. You might want to be careful about building a car for ethanol unless you're willing to pay race gas prices for it.
http://www.feinstein.senate.gov/publ...d-0636b31ca9cd
http://www.feinstein.senate.gov/publ...d-0636b31ca9cd
Steve, any idea what all could be different between your fuel system and turboedtpis car? The only thing the a/c would do is add more heat to the engine and fuel rails.... which brings us back to heat. Lol
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
What does the log say about the injector pulsewidths when this lean out happens
Senior Member
Joined: Jan 2001
Posts: 769
Likes: 4
From: DC_MD_VA Area
Car: 1991 Camaro RS
Engine: L03 305 V-8 (for now ;) )
Transmission: T-5 5 speed
Axle/Gears: stock... whatever that means :)
Re: ZZ3 Turbo Iroc - Round Three
Hey ZZ3Astro... Just wanna chime in...
Im not super tuner or anything like that. I only have forced induction experience (first hand) on Diesels, my GTP, a buddies old GN, and old MKIII Supra, an old Talon I used to own and a few other friends cars that I have worked on...
Watching your video, your fuel pressure took a minor crap right before it popped. I have seen this before. My GTP did it when the fuel pump crapped and started losing pressure under boost. It developed a nasty stumble pop under boost. I hooked up a gauge like you did and sure enough... fuel pump.
My buddies old GN did the same thing. Fuel pressure would rise, then fall... POP and all kinds of KR on his scanmaster. Replaced fuel pump and wala!
My old talon... same thing
Friend's old Supra... Same thing
I honestly dont think your fuel pump is keeping up. Can someone else watch the video and see if Im losing my mind? LOL!
Now again, im not some super boosted car tuner or anything (I did just buy HP Tuners Pro for my "future" project and my GTP) but I do have 10+ years shop experience. I think its your fuel delivery system. Pump, lines...
Just my opinion and just trying to help...
Im not super tuner or anything like that. I only have forced induction experience (first hand) on Diesels, my GTP, a buddies old GN, and old MKIII Supra, an old Talon I used to own and a few other friends cars that I have worked on...
Watching your video, your fuel pressure took a minor crap right before it popped. I have seen this before. My GTP did it when the fuel pump crapped and started losing pressure under boost. It developed a nasty stumble pop under boost. I hooked up a gauge like you did and sure enough... fuel pump.
My buddies old GN did the same thing. Fuel pressure would rise, then fall... POP and all kinds of KR on his scanmaster. Replaced fuel pump and wala!
My old talon... same thing
Friend's old Supra... Same thing
I honestly dont think your fuel pump is keeping up. Can someone else watch the video and see if Im losing my mind? LOL!
Now again, im not some super boosted car tuner or anything (I did just buy HP Tuners Pro for my "future" project and my GTP) but I do have 10+ years shop experience. I think its your fuel delivery system. Pump, lines...
Just my opinion and just trying to help...
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:28 AM.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:28 AM.
Supreme Member
Joined: Jul 2005
Posts: 1,210
Likes: 17
Re: ZZ3 Turbo Iroc - Round Three
My advice is pop the tail shaft off. If it's the bushing in the tail shaft (My brother's LT-1 Camaro had it happen) you'd just need to pop a new pushing in and drive it. At worse a tail shaft (he didn't catch it in time, had to do the tail shaft.) Shoot, I've got one here I'd send you for post if that is the case.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:29 AM.
Re: ZZ3 Turbo Iroc - Round Three
So it turns out the problem part is a simple spring pack that doesn't see any real stress from more power. An $8 reverse input drum spring pack. The c-clip pushed the flange back through itself 90 degrees, cutting a ring of the flange off and finally all the way through the pack. Kind of a weak design. I do believe this was a new part in the build 3.5 years ago.
The third gear clutches have been getting too hot. This explains or results from the third gear shift flare I get when running more than 16 psi. We installed a thicker shim to reduce pack play about .020" so maybe it will buy some more life for the clutches. The first gear clutches looked a little abused but in good working order.
All heavy duty hardware looked in great shape. Surprised the problem was something so simple and unrelated to the power the car is making for the most part. All this transmission really needs after 3.5 years is a new clutch pack for third to be in perfect shape.
My wallet, on the other hand, is going to hurt. I basically made a phone call at 4pm to a friend's shop. At midnight the front pump was all that was left to having the transmission back together. Should be back on the road by lunchtime tomorrow. I will have to pay for this level of service but I want it in Friday Fest tomorrow night!
[img]
The third gear clutches have been getting too hot. This explains or results from the third gear shift flare I get when running more than 16 psi. We installed a thicker shim to reduce pack play about .020" so maybe it will buy some more life for the clutches. The first gear clutches looked a little abused but in good working order.
All heavy duty hardware looked in great shape. Surprised the problem was something so simple and unrelated to the power the car is making for the most part. All this transmission really needs after 3.5 years is a new clutch pack for third to be in perfect shape.
My wallet, on the other hand, is going to hurt. I basically made a phone call at 4pm to a friend's shop. At midnight the front pump was all that was left to having the transmission back together. Should be back on the road by lunchtime tomorrow. I will have to pay for this level of service but I want it in Friday Fest tomorrow night!
[img]
Supreme Member
iTrader: (1)
Joined: Jan 2002
Posts: 4,432
Likes: 1
From: garage
Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: ZZ3 Turbo Iroc - Round Three
So it turns out the problem part is a simple spring pack that doesn't see any real stress from more power. An $8 reverse input drum spring pack. The c-clip pushed the flange back through itself 90 degrees, cutting a ring of the flange off and finally all the way through the pack. Kind of a weak design. I do believe this was a new part in the build 3.5 years ago.
The third gear clutches have been getting too hot. This explains or results from the third gear shift flare I get when running more than 16 psi. We installed a thicker shim to reduce pack play about .020" so maybe it will buy some more life for the clutches. The first gear clutches looked a little abused but in good working order.
All heavy duty hardware looked in great shape. Surprised the problem was something so simple and unrelated to the power the car is making for the most part. All this transmission really needs after 3.5 years is a new clutch pack for third to be in perfect shape.
My wallet, on the other hand, is going to hurt. I basically made a phone call at 4pm to a friend's shop. At midnight the front pump was all that was left to having the transmission back together. Should be back on the road by lunchtime tomorrow. I will have to pay for this level of service but I want it in Friday Fest tomorrow night!
The third gear clutches have been getting too hot. This explains or results from the third gear shift flare I get when running more than 16 psi. We installed a thicker shim to reduce pack play about .020" so maybe it will buy some more life for the clutches. The first gear clutches looked a little abused but in good working order.
All heavy duty hardware looked in great shape. Surprised the problem was something so simple and unrelated to the power the car is making for the most part. All this transmission really needs after 3.5 years is a new clutch pack for third to be in perfect shape.
My wallet, on the other hand, is going to hurt. I basically made a phone call at 4pm to a friend's shop. At midnight the front pump was all that was left to having the transmission back together. Should be back on the road by lunchtime tomorrow. I will have to pay for this level of service but I want it in Friday Fest tomorrow night!
That is great you took it apart to see what was going wrong. What 3rd clutch is in it? BorgWarner Hi-E 8 disc or did ya go 9 disc? Is that .020 wet or dry? That is on the tight side. What is the 3 and 4 separator plate holes drilled to?
3/4 clutch is tough to make last with that much hp/tq.
Pulling the rear section to clean or just doing the fix to the reverse drum?
Great job getting it done.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:29 AM.
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
Yeah i agree. Throw it on the back burner for awhile. That car has been a nightmare, time to day dream for awhile and then get back to it once the itch needs scratched again
Joined: Dec 2005
Posts: 6,499
Likes: 31
From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: ZZ3 Turbo Iroc - Round Three
When I finally got it back together it was worth the wait and it was a better car than I could have made it the first time around.
I wouldn't sell it, but working on it any more at this point is going to make you hate the car forever. These things are too much fun when they're working to let yourself ruin the experience. Put some Z-rod in it(corrosion inhibitors), some fuel preservative, put it on jackstands, and come back to it later.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:30 AM.
Thread Starter
Supreme Member
Joined: Jul 1999
Posts: 1,773
Likes: 7
From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: ZZ3 Turbo Iroc - Round Three
gone
Last edited by ZZ3Astro; Sep 23, 2015 at 11:30 AM.
Joined: Jul 2003
Posts: 10,538
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: ZZ3 Turbo Iroc - Round Three
Steve, others professing to have seen so and so, or they know so and so, who are running the stock trans and rear with a ten second car is just hearsay and speculation, and if someone does, it doesn't last too long. The reality is, you built yourself one heck of car, and had many many runs, and you should be very proud of that. Essentially stock parts with an upgrade thrown at them here and there should not be expected to live behind the power your making. I mean seriously, I hate to sound like that guy, but what did you expect? There is a guy on the buick boards who trashed several "built" 200R4's with his ten second GN during one season, and he finally just said screw it and went Turbo 400. It's a very expensive hobby if you want it to last punching it as many times as we do...
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: ZZ3 Turbo Iroc - Round Three
Welcome to the poweradder world. You wanna go 100+ in the 1/8 with a heavier car you kinda need beefy stuff.
Now i ran my car hard for 2 years on a 10 bolt into the 9's and dozen 10 sec passes but i dont think i beat on my car as hard as you do lol.
Dont worry about the th400 weight or the 9". It wont slow you down that much. You'll make the power once the fuel issues leave you alone. Else put on a better intake like single plane and i honestly think it will pick up a ton.
Leave it sit for abit
Now i ran my car hard for 2 years on a 10 bolt into the 9's and dozen 10 sec passes but i dont think i beat on my car as hard as you do lol.
Dont worry about the th400 weight or the 9". It wont slow you down that much. You'll make the power once the fuel issues leave you alone. Else put on a better intake like single plane and i honestly think it will pick up a ton.
Leave it sit for abit
Re: ZZ3 Turbo Iroc - Round Three
i feel strange having a good 3.23 9 bolt in my backyard as i type this. lol
could you post up a timeslip again? couldnt really expect much more, considering it had a stock rear, a 700r4, a tpi intake, factory type heads, and was full weight with stock suspension.
could you post up a timeslip again? couldnt really expect much more, considering it had a stock rear, a 700r4, a tpi intake, factory type heads, and was full weight with stock suspension.
Re: ZZ3 Turbo Iroc - Round Three
Welcome to the poweradder world. You wanna go 100+ in the 1/8 with a heavier car you kinda need beefy stuff.
Now i ran my car hard for 2 years on a 10 bolt into the 9's and dozen 10 sec passes but i dont think i beat on my car as hard as you do lol.
Dont worry about the th400 weight or the 9". It wont slow you down that much. You'll make the power once the fuel issues leave you alone. Else put on a better intake like single plane and i honestly think it will pick up a ton.
Leave it sit for abit
Now i ran my car hard for 2 years on a 10 bolt into the 9's and dozen 10 sec passes but i dont think i beat on my car as hard as you do lol.
Dont worry about the th400 weight or the 9". It wont slow you down that much. You'll make the power once the fuel issues leave you alone. Else put on a better intake like single plane and i honestly think it will pick up a ton.
Leave it sit for abit
swap heads to 195+ afr/trickflow/brodix etc
20psi boost
twin 255's, -8 feed, -6 return, regulator
trans- th400/good converter setup for turbo
rear- 12 bolt/9" with 3.08-3.23ish gears (still good for cruising)
suspension- lca's, relocation brackets, decent torque arm
i bet the car would touch 9's with just these items at the same weight, still look the same, and still be a good driver.