Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
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From: Norwalk, CA
Car: 91Z28
Engine: 5.7 ls1
Transmission: 4l60e
Axle/Gears: 3.42
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Ok because if it does ill buy some and just store them till i have money to complete the kit lol
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From: Lynden WA
Car: 84 Trans Am, 84 Fiero, 86 944
Engine: 5.0, 2.5, 2.5
Transmission: 5spd
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
haters make the world go round, cant remember the guy who said that, oh yeah it was jesus i think
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Personally I don't care if he holds it together with lollipops, sunshine and rainbows so long as he gets it running right and takes it to the dyno/track. No one likes a tease.
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by Drac0nic
No one likes a tease...

This build is definitely getting done, and then I am finished with third gens...
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From: Lynden WA
Car: 84 Trans Am, 84 Fiero, 86 944
Engine: 5.0, 2.5, 2.5
Transmission: 5spd
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
noooooooooooo, there fun to play with right? sure everyone else knows everything better then you alot but hey when it comes down to it, its your car. dont leave, we'd be losing a great member with alot of knowledge
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by kmcn47
noooooooooooo, there fun to play with right? sure everyone else knows everything better then you alot but hey when it comes down to it, its your car. dont leave, we'd be losing a great member with alot of knowledge...
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From: Lynden WA
Car: 84 Trans Am, 84 Fiero, 86 944
Engine: 5.0, 2.5, 2.5
Transmission: 5spd
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
ahhh, also my statement about you being wrong was sarcasm just so ya know
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From: NJ
Car: 87 Z28
Engine: AFR 383
Transmission: 700R4
Axle/Gears: 4:11
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
There was a meet at lowes on rt18 the other night. Alot of fast cars showed up. One trash talker was a miata with an LS1 pushing around 450 to the wheel. Running high 10's. I think you should hurray up so you can start laying the smack down with a measely 305
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by LS4GXP
There was a meet at lowes on rt18 the other night. Alot of fast cars showed up. One trash talker was a miata with an LS1 pushing around 450 to the wheel. Running high 10's. I think you should hurray up so you can start laying the smack down with a measely 305 

Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Just some more pics to keep the build in chronological order. Next set of pics will have the primaries welded into the "log", as well as the 1/2" T4 turbo flange. Still have no idea where I'm going to place the wastegate flange though, but I am more than likely leading to just underneath the downpipe on the top of the two center primaries on the log for easy access. Again, please ignore the welds until the conclusion of the build... 



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From: Mebane, N.C.
Car: Daily: Lincoln Town Car.
Engine: 355 SBC in the Fiero
Transmission: 5 speed F23 w/LSD
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
I saw you were debating a bit on the V-belt vs. Serpentine setup (seems you've definitely settled on serp?). What caught my attention was when you mentioned having to make adjustments (w/ v-belt) for the water pump.
I know you want to do a budget-build, but an electric water pump might be worth the investment. I've had one for years, absolutely love it.
I know you want to do a budget-build, but an electric water pump might be worth the investment. I've had one for years, absolutely love it.
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
More modification needed, the crossover to turbo header flange is just hitting the k-member, and rather than notch the member I'm going to cut off the flange and lower it closer to the bottom of the oil pan. No biggie, just a pita...
Everything is honestly still up in the air at the moment, as I didn't test fit the entire system on the engine just yet, and if the hood doesn't close I'll be forced to modify the setup to accomodate the compressor housing and slap on the v-belt system again. An electric water pump would be sweet, but I really don't want to steal any needed voltage away from the injectors when boost kicks in. Would have to get a much better alternator if I go that route...
Originally Posted by Trinten
I saw you were debating a bit on the V-belt vs. Serpentine setup (seems you've definitely settled on serp?). What caught my attention was when you mentioned having to make adjustments (w/ v-belt) for the water pump. I know you want to do a budget-build, but an electric water pump might be worth the investment. I've had one for years, absolutely love it...
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Joined: Dec 2008
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From: Mebane, N.C.
Car: Daily: Lincoln Town Car.
Engine: 355 SBC in the Fiero
Transmission: 5 speed F23 w/LSD
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Understandable. The electric water pump I have is one made by CSR, pulls less than 6 amps. Moves 35-37 GPM. Just in case your system could hold up to a constant 6 amp draw without any issues.
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
rob u ned to turn the amperage up on that welder
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by project89
rob u ned to turn the amperage up on that welder...
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
here ya go rob
they have mounts for driveer and pass side
http://www.alangrovecomponents.com/Catalog.htm
im ordering the mid mount from this page since i have along waterpump
http://www.alangrovecomponents.com/S..._Long_Pump.htm
and also the support bracket since my cyl head dosent have a accesory bolt hole
they have mounts for driveer and pass side
http://www.alangrovecomponents.com/Catalog.htm
im ordering the mid mount from this page since i have along waterpump
http://www.alangrovecomponents.com/S..._Long_Pump.htm
and also the support bracket since my cyl head dosent have a accesory bolt hole
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
I am a supporter of a little guy wanted to build a fast car and cheer them on from the cheap seats.
Yeah there is always a but.We have owned and raced 9.90 cars for yrs and it really isn't a cheap form of racing or not that easy.Well really I am talking about a car that runs the number round after round.I am always miffed why people pick a goal of a "9" second car.Why not 8 or 7 or 10 seconds??.If that achievement of 9 seconds is all that.................hummm,maybe I should think of myself as a "Hero in my own mind".
Yeah there is always a but.We have owned and raced 9.90 cars for yrs and it really isn't a cheap form of racing or not that easy.Well really I am talking about a car that runs the number round after round.I am always miffed why people pick a goal of a "9" second car.Why not 8 or 7 or 10 seconds??.If that achievement of 9 seconds is all that.................hummm,maybe I should think of myself as a "Hero in my own mind".

Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by project89
here ya go rob
they have mounts for driveer and pass side
http://www.alangrovecomponents.com/Catalog.htm
im ordering the mid mount from this page since i have along waterpump
http://www.alangrovecomponents.com/S..._Long_Pump.htm
and also the support bracket since my cyl head dosent have a accesory bolt hole
they have mounts for driveer and pass side
http://www.alangrovecomponents.com/Catalog.htm
im ordering the mid mount from this page since i have along waterpump
http://www.alangrovecomponents.com/S..._Long_Pump.htm
and also the support bracket since my cyl head dosent have a accesory bolt hole
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
I am a supporter of a little guy wanted to build a fast car and cheer them on from the cheap seats.
Yeah there is always a but.We have owned and raced 9.90 cars for yrs and it really isn't a cheap form of racing or not that easy.Well really I am talking about a car that runs the number round after round.I am always miffed why people pick a goal of a "9" second car.Why not 8 or 7 or 10 seconds??.If that achievement of 9 seconds is all that.................hummm,maybe I should think of myself as a "Hero in my own mind".

Yeah there is always a but.We have owned and raced 9.90 cars for yrs and it really isn't a cheap form of racing or not that easy.Well really I am talking about a car that runs the number round after round.I am always miffed why people pick a goal of a "9" second car.Why not 8 or 7 or 10 seconds??.If that achievement of 9 seconds is all that.................hummm,maybe I should think of myself as a "Hero in my own mind".


when it comes to a street car it just ways to costly once u get into the single digits, going from a 9 to a 8second car just costs a hell of a lot more,not to mention all the addes saftey equip.not to mention it wouldnt make a really fun street car at that point
rob yeah the ds mount wont work unless u ditch the power steering. the midmount bracket should pu tthe alt low anough to clear the compressor housings i know it will clear on mine but, but mine also clears witht he alt in the factory location.
i didnt look at the brackets they have for the short water pump but i think they have all the same mounts for either style pump
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
need to get a new transmission and rear before i start running the car, right now with only some street time ive already managed to blow up a built 700
saving up the money to buy a 4l80 /w transbrake and a dana 60 rear
overdrive is a must for me i refuse to give it up
shouldnt be to much longer though
only downside is both tracks close to me are both just under 300 miles away so i wont get to run the car a whole lot
i so miss living 5 miles away from a nice racetrack (e-town)
saving up the money to buy a 4l80 /w transbrake and a dana 60 rear
overdrive is a must for me i refuse to give it up
shouldnt be to much longer though
only downside is both tracks close to me are both just under 300 miles away so i wont get to run the car a whole lot
i so miss living 5 miles away from a nice racetrack (e-town)
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
need to get a new transmission and rear before i start running the car, right now with only some street time ive already managed to blow up a built 700
saving up the money to buy a 4l80 /w transbrake and a dana 60 rear
overdrive is a must for me i refuse to give it up
shouldnt be to much longer though
only downside is both tracks close to me are both just under 300 miles away so i wont get to run the car a whole lot
i so miss living 5 miles away from a nice racetrack (e-town)
saving up the money to buy a 4l80 /w transbrake and a dana 60 rear
overdrive is a must for me i refuse to give it up
shouldnt be to much longer though
only downside is both tracks close to me are both just under 300 miles away so i wont get to run the car a whole lot
i so miss living 5 miles away from a nice racetrack (e-town)

Wow, you gotta come to ohio, there is 3 within 1 hr of where I live
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by project89
i so miss living 5 miles away from a nice racetrack (e-town)...
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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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
about 260 miles to vegas speedway
and about 315 miles to the boneville salt flats
holy crap rob that sucks fridays used to be the best night to go
go get some runs in at e-town , leave at 10 pm and then be up in toms river for some street racing my 11/11:30
Thread Starter
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
The turbo header now clears the K-member, I'm taking off from work tomorrow and getting it all wrapped up because I was in Atlantic City all weekend and I didn't get a chance to do anything whatsoever. Lots of welding under the turbo flange still needs to be done, the inner primaries of course, turbo flange, wastegate flange, as well as the redoing of all of the welds the right way once they're all ground down and smooth. I measured the area underneath the heater delete box, and I will be able to fit a five inch downpipe through there. Spark plugs and wires have plenty of room, and the header bolts are extremely easy to get to...




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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
For ur belt system why not use a serpentine setup like I did? It seems like ur turbo is going to be somewhat close to where mine is I have an electric water pump serpentine with tensioner and alternator/ps on driver side I could easily add a mechanical pump by just getting a longer belt
Thread Starter
Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by noboostnogo
For ur belt system why not use a serpentine setup like I did? It seems like ur turbo is going to be somewhat close to where mine is I have an electric water pump serpentine with tensioner and alternator/ps on driver side I could easily add a mechanical pump by just getting a longer belt...
Joined: Nov 2007
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
that sounds kind of like what i did but i removed the smog pump and ac compressor and still reused the tensioner, ill upload a picture in a few hrs when i get to working on my car
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by DIGGLER
wire nuts. lol
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by noboostnogo
that sounds kind of like what i did but i removed the smog pump and ac compressor and still reused the tensioner, ill upload a picture in a few hrs when i get to working on my car...
Joined: Nov 2007
Posts: 715
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...

This is how I have mine it works flawlessly and very simple and cheap I have also used this same setup with a mechanical pump and never had a single problem
Joined: Nov 2007
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Here's another
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
That came out great! In my case, I would have to run a slightly longer belt than yours if I do that to wrap around the mechanical water pump, though. I just took a ride over to Napa and picked up a power steering pump pulley for fifteen bucks. Gonna try to adapt it to the gutted smog pump first, and if that doesn't work I will try joining it to the smog pump pulley by welding them together. The smog pump pulley is a little under three inches from the center to the outer diameter, and the power steering pump pulley is a little over three and a half inches from the center to the outer diameter, just enough to be able to use the tensioner. From there, it is just a matter of getting the right belt size, which will be a breeze. If all else fails, I'll be going the route that you went. Came out great... 
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
That pulley from Napa was a waste of money (not even gonna bother bringing it back lol), noboostnogo's idea is perfect. Just tried wrapping it around the way he has it, but with the water pump pulley still in tact, works great. The only bad part is when it comes to taking it off, as once the tensioner is set the belt is obviously locked in place, but when you lift the tensioner you can only go mid extension to get the belt off... as any further than mid extension and the belt gets tight all over again. Other than that, perfecto. Just need a belt now. Thanks noboostnogo.
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Got the rope all lined up (thanks again noboostnogo), now I gotta go have one of the rep's over at Advanced Auto match it up for me. Just an FYI for you guys following along, if you delete your air pump it must be deleted in your prom if your still running the stock ECM. To test that theory, disconnect the two electrical connections to the air pump solenoid and monitor your air fuel ratio, as your idle RPM will be surging within minutes...
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Thought maybe you guys might wanna get acquainted with her first before I started tearing into it (click the pic). Interior is actually black leather, and I have the original seats in my basement along with the original wrap around spoiler because they are in great condition. Engine is essentially stock except for 24-lb LT1 injectors and a chip that I burned awhile back. Can't wait to get this turbo on as my buddy Paul showed up yesterday telling me that he's got his Grand National trapping close to 135-mph, and I wanna line them up very very soon, highway, track, it don't matter, just bring it... 

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From: Lynden WA
Car: 84 Trans Am, 84 Fiero, 86 944
Engine: 5.0, 2.5, 2.5
Transmission: 5spd
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
i took the v belt of my air pump will that cause me problems? cuz it seems fine so far
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by kmcn47
i took the v belt of my air pump will that cause me problems? cuz it seems fine so far...
Thread Starter
Joined: Jul 2003
Posts: 10,526
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by kmcn47
i see, thanks and yeah a vid would be interesting...
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Street, have you ever tried island dragway in NJ?
What about atco? E-town went to poo way to long ago, i never go there. <well except to support friends, 1 time in 10 years, and it was a **** show as usual>
What about atco? E-town went to poo way to long ago, i never go there. <well except to support friends, 1 time in 10 years, and it was a **** show as usual> Senior Member
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From: NJ
Car: 87 Z28
Engine: AFR 383
Transmission: 700R4
Axle/Gears: 4:11
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Atco was alright. Only thing I didn't like was that you can't go around the water box. Easy fix though, put slicks on
. I noticed there was more cars built for the strip and very little breaking down compared to e-town and there 18 second hondas blowing oil all over the place.
Where's island dragway?
. I noticed there was more cars built for the strip and very little breaking down compared to e-town and there 18 second hondas blowing oil all over the place.Where's island dragway?
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
It's true about e-town, it changed tremendously in just the last six years. Last Wednesday was the same thing, someone oiled down the track and we were sitting there for an hour and a half waiting for them to clean it up. I love racing at Atco Raceway, I just can't stand the commute there. There is this one very long stretch of road heading there that demands like 40-mph, and they enforce it big time because the cops just sit there fishing, and it takes freaking forever lol. I haven't been to Island Dragway in a very long time, last time I was there it was essentially anything goes (guys were running in the 8's with just a rollbar, and the guys running in the 9's didn't even have a rollbar), I remember the track being very muddy too. Dave (project89), you raced at Island Dragway with your turbo V6 a lot, no...?
Joined: Mar 2011
Posts: 6,287
Likes: 41
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: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Just wanted to say builds looking good Rob!
Joined: Nov 2007
Posts: 715
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From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Got the rope all lined up (thanks again noboostnogo), now I gotta go have one of the rep's over at Advanced Auto match it up for me. Just an FYI for you guys following along, if you delete your air pump it must be deleted in your prom if your still running the stock ECM. To test that theory, disconnect the two electrical connections to the air pump solenoid and monitor your air fuel ratio, as your idle RPM will be surging within minutes...


Hey when I had my mechanical pump I went straight to the water pump from the crank that way it wrapped the belt nicely around the crank pulley then to the tensioner and then from there to the alt and ps. I think that's how tip cars have it i dont know if the way u have it would reverse the flow or cause flow problems due to the fins in the water pump??
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by fasteddi
Just wanted to say builds looking good Rob!
Forgot to post a picture of the new belt. Gotta be very careful when cutting the passenger side bracket for the belt, as you don't want to cut too much off as the tensioner needs to be reinforced as much as possible. Still contemplating just how much I will be cutting, but should have that part done today...
Thread Starter
Joined: Jul 2003
Posts: 10,526
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Chronicles of a 9 Second 305 Trans Am, Can It Be Done...
Originally Posted by noboostnogo
Hey when I had my mechanical pump I went straight to the water pump from the crank that way it wrapped the belt nicely around the crank pulley then to the tensioner and then from there to the alt and ps. I think that's how tip cars have it i dont know if the way u have it would reverse the flow or cause flow problems due to the fins in the water pump??
Joined: Nov 2007
Posts: 715
Likes: 0
From: Mechanicsville Virginia
Car: 1989 Turbo Trans Am gta
Engine: 383 78mm turbo
Transmission: Th350 rmvb with brake
Axle/Gears: 9 bolt 3.45s








