89 Iroc - 355,twin gt35's,megasquirt
Joined: Jul 2003
Posts: 10,539
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
One five second burnout won't take that much meat off lol. Did you buy those rims in the back with those tires already mounted, cuz I'm surprised the lettering is showing. Sounds decent though, looking forward to a launch...
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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: 89 Iroc - 355,twin gt35's,megasquirt
yeah i bought 4 rims and brand new tires for 200 bucks( tires were already on the rims ) , dont care for the rims much , going to switch the tires over to the centerlines after i polish them
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Wish you would of told me, I have two 16" Cooper tires from Summit Racing that I spent over four hundred dollars for (over two hundred bucks a piece), and am getting rid of them for seventy five bucks for both of them...
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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: 89 Iroc - 355,twin gt35's,megasquirt
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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: 89 Iroc - 355,twin gt35's,megasquirt
new goal !!!!!!!!!!!!!!!!!!!!!!!!!!!
got my new boost gauge old one only went to 10 psi , new goal is to swing this gauge needle past the +30 , i already know the motor holds together at 22 psi , how much damage could another 8 psi possibly do lol
got my new boost gauge old one only went to 10 psi , new goal is to swing this gauge needle past the +30 , i already know the motor holds together at 22 psi , how much damage could another 8 psi possibly do lol
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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: 89 Iroc - 355,twin gt35's,megasquirt
this video is for u fast
as u can see the engine sounds totally different , i swapped cams yet again boost comes up fast with this one
as u can see the engine sounds totally different , i swapped cams yet again boost comes up fast with this one
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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: 89 Iroc - 355,twin gt35's,megasquirt
lots to do and no time to do it


picking up a 3 core aluminum radiator this week hopefully that cures my cooling issues
decided to completly strip the whole car before painting it , was supposed to go for primer this weekend but i dont think ill have it finished in time


picking up a 3 core aluminum radiator this week hopefully that cures my cooling issues
decided to completly strip the whole car before painting it , was supposed to go for primer this weekend but i dont think ill have it finished in time
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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: 89 Iroc - 355,twin gt35's,megasquirt
got the roof and passenger side quarter panel fully stripped.
the plan is to get the passenger door and front fender stripped and preped today ( tuesday) and if i have time start on the ds front fender
then on wensday finish stripping the other side of the car, and then head over for epoxy primer on friday/saturday
somewere in there i have to mount up me new radiator
its a 3 core champion unit but its not an fbody unit , its the same height but 3 inches less in width , should be able to pretty much drop it in i hope
the plan is to get the passenger door and front fender stripped and preped today ( tuesday) and if i have time start on the ds front fender
then on wensday finish stripping the other side of the car, and then head over for epoxy primer on friday/saturday
somewere in there i have to mount up me new radiator
its a 3 core champion unit but its not an fbody unit , its the same height but 3 inches less in width , should be able to pretty much drop it in i hope
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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: 89 Iroc - 355,twin gt35's,megasquirt
here ya go , somone plz tell me im not crazy for doing this myself lol


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Engine: 3xx ci tubo
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Re: 89 Iroc - 355,twin gt35's,megasquirt
Looking good. Looks like paint stripper. I hope there aren't any kids or animals around.
Have you run it at the track with the turbos?
Have you run it at the track with the turbos?
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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: 89 Iroc - 355,twin gt35's,megasquirt
and i have to have it ready for epoxy primer on friday so i switched to chemically stripping the car , its making life alot easier on me , i did just about that whole side of the car in 1.5 hours , would have taken me a whole day just to sand it i was supposed to take the car to las vegas last week but i used the money i had set aside for that trip (6xx) miles round trip and used it for getting the car painted, i also havent goten the cage installed yet so it would have been a wasted trip anyways
ill get it out out to the track when it starts to cool off its been 105+ here for the past few weeks and going south is only going to be worse
mid fall ill prolly hit the track with it
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From: Northwest Ohio
Car: 1991 Camaro RS
Engine: Lq4 6.0 SBE s485 turbo E85
Transmission: Fsi th400 stage 4. TSI 5500 st
Axle/Gears: Strange S60 4:10s
Re: 89 Iroc - 355,twin gt35's,megasquirt
Cant wait to see it run. Makes me grateful that there is a half a dozen tracks within 2 hrs from my house.
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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: 89 Iroc - 355,twin gt35's,megasquirt
but since its not official i will just say mph was high!!!!
the closest drags to me that are official is another airport drag they do like once a month down south , about a 200 mile round trip ill prolly end up going to one of those before i make it out to a real track as its a ton closer
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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: 89 Iroc - 355,twin gt35's,megasquirt
its 11:20 am here and my friend just dropped off his da for me, im feeling pretty confident i can finish the car tonight to have it ready for friday
here is how the car sits right now

here is how the car sits right now

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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: 89 Iroc - 355,twin gt35's,megasquirt
thanks to a board member on my local car forums i picked this up today for 75$'s
champion 3 core radiator and fan

its 18.5 tall , 27 wide , and 2.5 or 3 inch thick , it was originally out of his nova but the size was close enough i figured it would work in the iroc and i was right , witht he exception of having to bend the trans cooler lines just a tad to make it fit and also trim the upper radiator hose about 2 inches
btw the champion units made for our cars ar 18.5, x 30 x 2.5 so this one was only 1.5 inch narrower
i got it installed tonight and with only a single stock fan it droped 40* out of my coolant temps , need to get a mounting kit for the fan i got with it
champion 3 core radiator and fan

its 18.5 tall , 27 wide , and 2.5 or 3 inch thick , it was originally out of his nova but the size was close enough i figured it would work in the iroc and i was right , witht he exception of having to bend the trans cooler lines just a tad to make it fit and also trim the upper radiator hose about 2 inches
btw the champion units made for our cars ar 18.5, x 30 x 2.5 so this one was only 1.5 inch narrower
i got it installed tonight and with only a single stock fan it droped 40* out of my coolant temps , need to get a mounting kit for the fan i got with it
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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: 89 Iroc - 355,twin gt35's,megasquirt
still have to make good brackets for it but it droped in nicely tons more room to now that dual fan setup is gone


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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: 89 Iroc - 355,twin gt35's,megasquirt
looks like i may have to say goodbye to this car , have an offer on it i almost cant refuse that is of course once its painted , and i think i found my next car
u guys will prolly kill me for this but im going to look at a friends c5 vette this weekend after we get paint on the iroc.
i have a feeling i will more then likley be comming home with the vette
u guys will prolly kill me for this but im going to look at a friends c5 vette this weekend after we get paint on the iroc.
i have a feeling i will more then likley be comming home with the vette
Joined: Mar 2011
Posts: 6,287
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From: Northwest Ohio
Car: 1991 Camaro RS
Engine: Lq4 6.0 SBE s485 turbo E85
Transmission: Fsi th400 stage 4. TSI 5500 st
Axle/Gears: Strange S60 4:10s
Re: 89 Iroc - 355,twin gt35's,megasquirt
She looking good dave. Nothing wrong with getting a vette.
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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: 89 Iroc - 355,twin gt35's,megasquirt
just got the car home
andim so friggen happy with the way the car came out , still need to block sand n etc , but with the car looks in just primer , im thinking about blocking the car 2 more coats of primer and then a matte clear to finish it off instead of the pure black spi base mixed with blue pearl , and high gloss clear





im not getting the vette i cant part with the iroc now , and the wife says if i get the vette camaro has to go
andim so friggen happy with the way the car came out , still need to block sand n etc , but with the car looks in just primer , im thinking about blocking the car 2 more coats of primer and then a matte clear to finish it off instead of the pure black spi base mixed with blue pearl , and high gloss clear





im not getting the vette i cant part with the iroc now , and the wife says if i get the vette camaro has to go
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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: 89 Iroc - 355,twin gt35's,megasquirt
the iroc is being moved to daily driver status tommorow since i have to rip the top half of the engine off the truck and re seal it
if all goes well with the iroc for the first few days , i may attempt to gather everything i need to install the d1sc on the truck while im in there working on it
i just wish i knew 100% for sure that the stock clutch in the truck can hold upto the extra power the procharger is going to make
if all goes well with the iroc for the first few days , i may attempt to gather everything i need to install the d1sc on the truck while im in there working on it
i just wish i knew 100% for sure that the stock clutch in the truck can hold upto the extra power the procharger is going to make
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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: 89 Iroc - 355,twin gt35's,megasquirt
car is officially daily driver status now , even got followed around by highway patrol while cruising threw town today
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Re: 89 Iroc - 355,twin gt35's,megasquirt
Highway patrol drives around town too?
Nothing like crisp body lines after a strip & prime. Have you dynoed it?
Nothing like crisp body lines after a strip & prime. Have you dynoed it?
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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: 89 Iroc - 355,twin gt35's,megasquirt
at full boost im at 75-78% duty cycle on 65# injectors so should put down some solid numbers
i think when i swap the gt3582 turbos on i may need to upgrade the injectors
and yes hp is allowed to patrol in town, there here alot since most of the hp officers live in my town
on a typicall day we have 1 or 2 sheriffs on duty , and usually 1 hp in town
today is pioneer day , big parade and fireworks tonight etc , huge thing in this town so theres alot of cops out yesterday and today
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Engine: 3xx ci tubo
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Re: 89 Iroc - 355,twin gt35's,megasquirt
The GT3582 is a 61.4mm comp inducer, right? You have 57mm on it now if I remember correctly.
Your dyno method is same as mine. I use the injector DC and calced BSFC to get FWHP. Track times help too. Those 57mm are a good fit. Why upgrade?
Your dyno method is same as mine. I use the injector DC and calced BSFC to get FWHP. Track times help too. Those 57mm are a good fit. Why upgrade?
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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: 89 Iroc - 355,twin gt35's,megasquirt
im ditching the tpi on the motor and going to a single plane efi manifold so that will open up the top of the rpm range for a good bit more power, when i do that the gt3582's will be a better match and prolly make 70 more hp across the board
not to mention the gain i will see from 4,800 - 6k
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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: 89 Iroc - 355,twin gt35's,megasquirt
fouled my plugs this morning cruising around town , buttook a short lil clip on my 2 block trip back home
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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: 89 Iroc - 355,twin gt35's,megasquirt
turns out i didnt foul the plugs when i was working on the car i accidently unplugged the ait
so the ecm was seeing -60* temps and adding a ton of fuel
so the ecm was seeing -60* temps and adding a ton of fuel
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Re: 89 Iroc - 355,twin gt35's,megasquirt
Other than the occasional "glued compressor housing" comments, the 57 trim comp .63 A/R T3 units seem to have a decent track record.
How is the reliability of the gt3582 units? Cost is starting to climb for a china piece but still cheap for a 61mm unit. Not sure if I like the .82 T3 housing. Might as well go T4 at that point.
Yeah, no matter how much porting and mods done to a TPI intake.......I still think they are good for engines spinning less than 5200 RPM. If you can fab stuff then the single plane EFI is a good way to go. Although, I have a modded LT1 intake that works well and was cheap to do. My next intake is a single plane EFI if that tells you anything.
How is the reliability of the gt3582 units? Cost is starting to climb for a china piece but still cheap for a 61mm unit. Not sure if I like the .82 T3 housing. Might as well go T4 at that point.
Yeah, no matter how much porting and mods done to a TPI intake.......I still think they are good for engines spinning less than 5200 RPM. If you can fab stuff then the single plane EFI is a good way to go. Although, I have a modded LT1 intake that works well and was cheap to do. My next intake is a single plane EFI if that tells you anything.
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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: 89 Iroc - 355,twin gt35's,megasquirt
Other than the occasional "glued compressor housing" comments, the 57 trim comp .63 A/R T3 units seem to have a decent track record.
How is the reliability of the gt3582 units? Cost is starting to climb for a china piece but still cheap for a 61mm unit. Not sure if I like the .82 T3 housing. Might as well go T4 at that point.
Yeah, no matter how much porting and mods done to a TPI intake.......I still think they are good for engines spinning less than 5200 RPM. If you can fab stuff then the single plane EFI is a good way to go. Although, I have a modded LT1 intake that works well and was cheap to do. My next intake is a single plane EFI if that tells you anything.
How is the reliability of the gt3582 units? Cost is starting to climb for a china piece but still cheap for a 61mm unit. Not sure if I like the .82 T3 housing. Might as well go T4 at that point.
Yeah, no matter how much porting and mods done to a TPI intake.......I still think they are good for engines spinning less than 5200 RPM. If you can fab stuff then the single plane EFI is a good way to go. Although, I have a modded LT1 intake that works well and was cheap to do. My next intake is a single plane EFI if that tells you anything.
the reliability is the same as the 50 and 57's fasteddi has one on his car right now and it makes more power at 11 psi then he did with the 57 at 18 psi
u can get the gt3582 with a t4 housing as well i think they are 50 bucks more
seems like the prices on the turbos have been dropping ever since they started to offer the 66mm 70mm 72mm and 76mm variants
atleast the prices have dropped on the 61's and smaller the larger turbos are still up there
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Car looks good, but your tune looks way off, air/fuel is all over the place. Doesn't Megasquirt have a self tuning feature for the VE and SA? Cam is pulling over 20" at idle, so it should be a breeze to tune that thing. Any datalogs you can throw up...?
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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: 89 Iroc - 355,twin gt35's,megasquirt
needless to say i wont be trying out the nitrous again for a lil while
megasquirt will self tune ve but not sa, due to the quality of gas here ive been running timing locked at 16* for right now since i cant always fill up with the good stuff around here
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Originally Posted by project89
megasquirt will self tune ve but not sa, due to the quality of gas here ive been running timing locked at 16* for right now since i cant always fill up with the good stuff around here..
Throw up some datalogs, wanna put them in Tuner Studio and have a looksie...
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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
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Originally Posted by project89
i have to drop the gf off at work in 10 minutes. ill datalog the trip and post it...
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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: 89 Iroc - 355,twin gt35's,megasquirt
Post up your SA Main Table as well, I want to take a look. I was relegated to running the stock LB9 SA Main Table, which is absolute garbage, and this was because my TunerPro wasn't executing the changes that I made for some reason, would go back into the bin after a run and see that it was the same. Finally got that sorted out and she's running like she is supposed to...
no point in posting my sa table as its 16* across the table from 2k rpms up.
ill post up the table i usually run from my other laptop though its pretty much a stock l98 table with 28* of timing from 1-9psi , 25* 7-12psi and 21-23* 13-18 psi anything over 20 psi of boost is brought back to 20*
its a pretty aggressive curve for something with that much boost and iron heads but i havent had any signs of detonation yet, it also helps that im 6,500 ft above sealevel so i can get away with a lot more sa then u can there at sealevel
Last edited by project89; Aug 4, 2013 at 10:05 PM.
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Originally Posted by project89
i didnt get a chance to datalog it as she was running late. ill log it when i pick her up tonight at 11.
no point in posting my sa table as its 16* across the table from 2k rpms up.
ill post up the table i usually run from my other laptop though its pretty much a stock l98 table with 28* of timing from 1-9psi , 25* 7-12psi and 21-23* 13-18 psi anything over 20 psi of boost is brought back to 20*
its a pretty aggressive curve for something with that much boost and iron heads but i havent had any signs of detonation yet, it also helps that im 6,500 ft above sealevel so i can get away with a lot more sa then u can there at sealevel
no point in posting my sa table as its 16* across the table from 2k rpms up.
ill post up the table i usually run from my other laptop though its pretty much a stock l98 table with 28* of timing from 1-9psi , 25* 7-12psi and 21-23* 13-18 psi anything over 20 psi of boost is brought back to 20*
its a pretty aggressive curve for something with that much boost and iron heads but i havent had any signs of detonation yet, it also helps that im 6,500 ft above sealevel so i can get away with a lot more sa then u can there at sealevel
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Re: 89 Iroc - 355,twin gt35's,megasquirt
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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: 89 Iroc - 355,twin gt35's,megasquirt
with the iat unplugged the ecm will see -40* air temps and throws a massive amount of fuel at the engine.
it didnt foul the plugs , it just acted that way till i got the iat plugged back in
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Originally Posted by junkcltr
What ECM/PCM does ION sense?
Originally Posted by junkcltr
I thought he said the fouled plugs were due to IAT being disconnected...
Thread Starter
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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: 89 Iroc - 355,twin gt35's,megasquirt
From what I hear in the Turbo Buick world, XFI is about to release this feature. BMW and Harley Davidson already use ION sense self learning in their computer control, and I believe Megasquirt is very close to releasing it too, although it's been rumored for quite awhile with them, and looks like it's never going to happen, which is the reason why I was teasing Dave...
Hard to tell what is going in with Dave's setup, as a few months back he was convinced his cam was enormous because of the idle, but it turned out it was his injector drivers, and once fixed, idles smooth with very high vacuum...
Hard to tell what is going in with Dave's setup, as a few months back he was convinced his cam was enormous because of the idle, but it turned out it was his injector drivers, and once fixed, idles smooth with very high vacuum...
i took the edlebrock cam out a while back its got a really tame summit cam in it now.also it dont have as much vacum as u think u need to subtract 5 inches from what u see on the gauge , at my altitude my gauges and map read 5 inches low with key on engine off, it takes 4-5 psi of boost just to get back to sea level atmosperic presure , im at an actual 6,500 ft above sea level , with the da on most days being around 7-8500
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Originally Posted by project89
also it dont have as much vacum as u think u need to subtract 5 inches from what u see on the gauge , at my altitude my gauges and map read 5 inches low with key on engine off, it takes 4-5 psi of boost just to get back to sea level atmosperic presure
Thread Starter
Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
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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: 89 Iroc - 355,twin gt35's,megasquirt
Your gauge is reading just under 25" in your video, so let's say it is 23" inches of vacuum at idle, minus 5" because of your altitude so call it 18" overall, which is still essentially stock LB9/L98 vacuum territory. This is why I want to see a datalog, can figure out quite a bit from it. Did you run the second datalog you were going to that night? Can you post it...?
Thread Starter
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: 89 Iroc - 355,twin gt35's,megasquirt
finally put the damn bov on it
shot this last night at light throttle about 2 psi of boost
shot this last night at light throttle about 2 psi of boost
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Haha, you'll never change, still after that Supra sound aren't ya...
What kid of camera are you using to take the vids...?
What kid of camera are you using to take the vids...?
Thread Starter
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: 89 Iroc - 355,twin gt35's,megasquirt
lol that bov sounds so damn good it was late when i shot that video so i didnt want to wake everyone in town up so i got on it enough just to build 1-2 psi
if i can later ill take another one up around 8 psi so u can see how loud it is
Thread Starter
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: 89 Iroc - 355,twin gt35's,megasquirt
yay for no traction lol , 2nd gear light throttle
Thread Starter
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: 89 Iroc - 355,twin gt35's,megasquirt
stepped up the tune just a tad bit more and this thing is a total f'ing blast to street drive
though im starting to think it would make a better drift then drag car.
the power comes on smooth as hell and its very controllable, these turbos are a perfect match to a pretty mild 350/355 with tpi
though im starting to think it would make a better drift then drag car.
the power comes on smooth as hell and its very controllable, these turbos are a perfect match to a pretty mild 350/355 with tpi
Joined: Jul 2003
Posts: 10,539
Likes: 206
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: 89 Iroc - 355,twin gt35's,megasquirt
Nice, gotta nickname your Camaro "Freddy" cuz it sounds like one of those BOV's you'd hear coming from Freddy Krueger's basement, sounds sweet as hell...








