1980 pontiac trans am question
05-10-2008, 03:26 AM
#21
0.5 BAR
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Join Date: Jun 2007
Posts: 185
Re: 1980 pontiac trans am question
Okay first of all who said I give a ---- about if this motor is good or not in fact I am pretty sure I said I am gonna beat the ---- out of it til it blows up then swap in a 350 or 454 with a manual tranny and build the motor. But as of right now I have a 301 actually I made a mistake. I thought it had the 305. but it is the 4.9 liter. It puts out nothing when it comes to power as far as v8's go and I may strangle myself with my speedo cable if I ever get beat in the quarter by any ford, and right now I am pretty sure I will get owned. But anyways, I was thinking about experimenting a little and looking into how toyota did the twin turbo setup on the supras with the whole one turbo helping spool the other idea and try something like that. Run a t25 or something a bit bigger and have it help spool a t3 if I can make it work. We will see. But right now I haven't touched the car my dad says he wants to buy the car from me. And for the guy who said sell it and buy a rex. I have a 91 si on my radar. I have always wanted a rex since I was a kid.
As for the T/A should I keep it that is my plan for now. As for anyone who disses on the GM small blocks I challenge them to show me a V8 that lasts as long. Chevy is like the honda of the 60's, 70's, and 80's. Everyone has owned one at one point and every little thing you could ever wanna do to it has been done which makes it really easy to find parts for it cheap as hell if you can't make it for yourself.
As for the T/A should I keep it that is my plan for now. As for anyone who disses on the GM small blocks I challenge them to show me a V8 that lasts as long. Chevy is like the honda of the 60's, 70's, and 80's. Everyone has owned one at one point and every little thing you could ever wanna do to it has been done which makes it really easy to find parts for it cheap as hell if you can't make it for yourself.
05-10-2008, 03:51 AM
#22
0.0 BAR
Join Date: Feb 2006
Posts: 2
Re: 1980 pontiac trans am question
I know I haven't made my intro post yet but I am waiting untill I get my project done untill I do so. I just thought these links would help.
http://www.toohighpsi.com/index.htm
http://www.skulte.com/turbo.html
http://www.ttz28.com/
http://www.toohighpsi.com/index.htm
http://www.skulte.com/turbo.html
http://www.ttz28.com/
05-10-2008, 11:21 AM
#23
1.0 BAR
Join Date: Oct 2006
Posts: 536
Re: 1980 pontiac trans am question
Originally Posted by HiProfile
Just let him do a HMT setup and blow the 305 while he builds a smc or bigblock. Before the 305, 70-80k was decent before refreshing the motor, but again that's with carbs. Why don't you all stop bitching about if a 25yr old motor design in better than a 50yr old design and start brainstorming what he should use.
I vote for two 14b turbos, since they can give up 240whp on a D16 with moderate boost. They'd spool decent, be cheap, and will work fine if you weld dsm flanges on chevy shorty headers. I'd use a th350 or 400 if you can, get it rebuild w/converter & shiftkit for $300 total, and it will last a long time. As for fuel/ign, I'm clueless what works best on cars from the early 80's.
I vote for two 14b turbos, since they can give up 240whp on a D16 with moderate boost. They'd spool decent, be cheap, and will work fine if you weld dsm flanges on chevy shorty headers. I'd use a th350 or 400 if you can, get it rebuild w/converter & shiftkit for $300 total, and it will last a long time. As for fuel/ign, I'm clueless what works best on cars from the early 80's.
i think either 2 18g turbos or a single 20g, both seem like they would spool quick enough and would give an overall power limit of abut 450hp and the 305 will blow up just thinking about 450hp so on low boost it should be fine
05-10-2008, 12:33 PM
#24
3.0 BAR
Join Date: Feb 2006
Posts: 2,808
Re: 1980 pontiac trans am question
Originally Posted by Ntrain2k
#1, I've been here a hell of a lot longer then you.
#2, Your the newb from reading your posts.
#3, I have ---- more horsepower then you have ever built.
#4, that is all bitch. Now shut me the ---- up.
#2, Your the newb from reading your posts.
#3, I have ---- more horsepower then you have ever built.
#4, that is all bitch. Now shut me the ---- up.
Cornfuzed, shut the ---- up
05-10-2008, 01:34 PM
#25
3.0 BAR
Join Date: Apr 2005
Posts: 6,036
Re: 1980 pontiac trans am question
Originally Posted by Ntrain2k
#1, I've been here a hell of a lot longer then you.
#2, Your the newb from reading your posts.
#3, I have ---- more horsepower then you have ever built.
#4, that is all bitch. Now shut me the ---- up.
#2, Your the newb from reading your posts.
#3, I have ---- more horsepower then you have ever built.
#4, that is all bitch. Now shut me the ---- up.
05-10-2008, 02:12 PM
#27
0.5 BAR
Thread Starter
Join Date: Jun 2007
Posts: 185
Re: 1980 pontiac trans am question
Well like I said my current plan right now is wait and see what my Dad decides. If he chooses not to buy it I will do a twin turbo setup with a t28 or so and something like a t3/t4 or just a t4 for the big turbo much like the twin turbo setup on the Supras. Besides anyone who says 305's or 350's won't go for a ton of miles my dad had a fullsize van that we used to take on yearly trips out to Illinois and back for like 8 years straight. I think when we sold it the van had over 180,000 miles on the untouched 305. At least I think it was a 305 I was like 10 when we sold it. But the guy we sold it to continued to take it on trips but to Michigan this time twice yearly for the next 4 years and it was still running great untouched when he sold it. I don't know what has happened to it since then but when it was sold it was close to 225,000 miles. So there is one first hand impression of any chevy small block. I am not looking at this motor and thinking it is a beast I am looking at it and seeing a car that will maybe make 14 or 15 second quarter mile passes. This car is my toy. I want to at least run 13's or lower if possible. Its not like I am going to daily drive a car that is twin turboed with a carb tune. I wouldn't trust it that much. I will be putting hardly any miles on this motor so how long the motor lasts isn't an issue at all.
05-10-2008, 02:16 PM
#28
Guest
Posts: n/a
Re: 1980 pontiac trans am question
Originally Posted by cornfuzed
hey newbie, shut the ---- up you only have 21posts
just like at the six flags you must be... tall to ride the ride
if not just watch and shut the ---- up
just like at the six flags you must be... tall to ride the ride
if not just watch and shut the ---- up
with that being said, the 305 does suck.
it has serious quench problems and doesnt promote anywhere near an even burn. not even positive pressure at the end of the intake stroke (i.e. boost) would help it overcome that. cyl filling is ----. they leak from the rear main even when new, 2 bolt mains ftl, the worst example of a v8 i can think of, hell even an olds 307 is better than that...
the only positive you have going is it started life as a v8 car (no changing motor mnt pads, can technically run your tranny with a 350 but it wont live long). go get a 350 from a junkyard for $100 and a full rebuild kit (chevy kits have EVERYTHING for like $17). rebuild it to stock and low boost it. get a stall converter and some gears too, then it will be tons more fun than you have now.
05-11-2008, 02:31 PM
#29
1.0 BAR
Join Date: May 2008
Posts: 308
Re: 1980 pontiac trans am question
Originally Posted by D16y7DX
Okay I bought a 1980 305 trans am with plans to twin turbo it homemade style, do a custom exhaust with the car gutted. I plan on hopefully putting out around 350 horses and 400 lbs/ft. I would like to if possible run mid to low 13's with street tires and the stock auto tranny. Is this a reasonable horsepower goal or are my sights too high for a stock motor besides the turbos? Also are the turbo's from the 301 turbo trans ams any good does anyone have experience with them? And can I just rotate the turbo on the stock turbo manifold from being a right hand manifold so I can put it on the left side instead?
05-24-2008, 10:40 PM
#30
0.5 BAR
Thread Starter
Join Date: Jun 2007
Posts: 185
Re: 1980 pontiac trans am question
Originally Posted by keelay
only cause you start rediculous posts, and ---- on EVERYONE'S threads with worthless/incorrect input.
with that being said, the 305 does suck.
it has serious quench problems and doesnt promote anywhere near an even burn. not even positive pressure at the end of the intake stroke (i.e. boost) would help it overcome that. cyl filling is ----. they leak from the rear main even when new, 2 bolt mains ftl, the worst example of a v8 i can think of, hell even an olds 307 is better than that...
the only positive you have going is it started life as a v8 car (no changing motor mnt pads, can technically run your tranny with a 350 but it wont live long). go get a 350 from a junkyard for $100 and a full rebuild kit (chevy kits have EVERYTHING for like $17). rebuild it to stock and low boost it. get a stall converter and some gears too, then it will be tons more fun than you have now.
with that being said, the 305 does suck.
it has serious quench problems and doesnt promote anywhere near an even burn. not even positive pressure at the end of the intake stroke (i.e. boost) would help it overcome that. cyl filling is ----. they leak from the rear main even when new, 2 bolt mains ftl, the worst example of a v8 i can think of, hell even an olds 307 is better than that...
the only positive you have going is it started life as a v8 car (no changing motor mnt pads, can technically run your tranny with a 350 but it wont live long). go get a 350 from a junkyard for $100 and a full rebuild kit (chevy kits have EVERYTHING for like $17). rebuild it to stock and low boost it. get a stall converter and some gears too, then it will be tons more fun than you have now.
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