Kind of a noob question about the pontiac 301 turbo
 

Does anyone know if they have similar flanges to any other turbo in any other car or that are sold anywhere? I am having issues trying to find a turbo for a turbo 301 motor I just bought. The guy kept the turbo which is fine the seals were blown anyways. I have looked tons of places for this yet can't find any info and/or turbo's. Anyways anyone know where I can find a turbo from another motor or from a company that sells new or rebuilt turbo's for this motor?

Re: Kind of a noob question about the pontiac 301 turbo
 

weEeep :8

Re: Kind of a noob question about the pontiac 301 turbo
 

What a dog ass car.

If the car has sat for any time ---- the turbo. That carb is a piece of ----.

Re: Kind of a noob question about the pontiac 301 turbo
 

What JD said. I've read a lil bit about those cars, and those engines blow. Swap in a 350 or sumthin' and boost that.

Re: Kind of a noob question about the pontiac 301 turbo
 

you suck. I just gave away an old TB0305 for an 81 TTA like three months ago. Perfect condition with less than a week of use (in the 80's). A guy I knew bought it new back in 81 from GM Parts as an easy way to get a bigger turbo for his blow-through 79 Mustang turbo 2.3 (which he promptly crashed at the track). The early Ford and Pontiac turbos are almost the same, except for the hugeness of the Pontiac piece. I had that heavy piece of ---- in my closet for like 5 years. I gave it to a friend who's got a compound-turbo Jetta. Sucks to be you.

You don't want those turbos anyways. except for concourse show-cars. Shitty compressor design, shitty turbine, shitty mounting, shitty 70's technology. All around fail. They are basically the earliest ancestor of the later T3 frame. The bolt patterns are all retarded, too. Just buy a dirty cheap T4 or something cool, like the Holset VGT that one DSM guy here is running. All you need to support is like 200 hp. That's all the stock Turbo Trans Am made back then. Hell, they broke a lot at those power levels. The suck-through carb/turbo thing is a shitty all around idea. The fuel pools up in the compressor and good fuel distribution is impossible.

Take the small block advice from CspecRun. The 301 was a poorly concieved Bolivian Ass-chowder of an engine. I'm sorry if that hurts your feelings, but you need to hear it sooner or later (preferably before you throw a bunch of money at it). If you need to throw an engine at a 301 car and you really dont want to change mounts and transmissions, you can always use a 350 Oldsmobile or 403 Olsmobile. Out of the Buick-Olds-Pontiac trifecta of suckitude, the late 70's and early 80's Olds motors were the least offensive. And they're cheap (ish). Just don't go turbo one of those. They'll pop head gaskets more often than I pop wood (at least 3 times a day, in case you're wondering). The early 70's and older engines from those three companies are ------- expensive. Probably worth more than any car a 301 came in. Sorry again.

If you want to be extra-bawler and you already have a running (!) 301 with a bad turbo, use this opportunity to fix what Pontiac fucked up on. Spend a few hundred bucks on a Megasquirt and 8 used injectors, learn how to weld injector bungs onto that cast-iron heap-of----- intake the turbo 301 has, and get a real turbo on that motor. It has no compression (like 7.5:1), so that's good. The biggest problem with these was fuel distribution with that suck-through carb. Do away with that and you might have an engine that sounds good and makes the same power as my stock 08 Si. Unfortunately, like the fat-assed Si, the 301 will never be fast on a budget. It might be faster than it is now, but there will always be some fucktard in a turbo 89 d15 heap that smokes your ass like a QP of purple. Wanna be faster than that porch monkey in the $400 89 hatch? Throw a small block Chevy in your ---- NOW!

Re: Kind of a noob question about the pontiac 301 turbo
 

------ sig material right there lol. :6

Re: Kind of a noob question about the pontiac 301 turbo
 

Olds diesel, great block to build with :)

Re: Kind of a noob question about the pontiac 301 turbo
 

454 main journals and boring the block 1/4" with impunity FTW.

Do they still make that factory gasoline conversion kit for those, bone?

Re: Kind of a noob question about the pontiac 301 turbo
 

So, what the ---- are you gonna do with this bitch? Curiosity is getting to me. And where the ---- did you dig up a turbo 301 anyway? Mexico? China? A Bolivian's mom's ass? Unleash your knowlege, beaner!

Re: Kind of a noob question about the pontiac 301 turbo
 

Beaner? funny. actually I wasn't lucky enough to find the 301 t/a I found and bought the turd of all turds when it comes to Trans Ams. I got the n/a 301 turbo. I am just looking for a relatively cheap way to add power quickly, and I am guessing it would be relatively cheap to swap over the turbo setup from a 301 turbo. But I have thought through every motor combo you could think of. I am just looking at every option I can before deciding.

So far it has pretty much boiled down to:
383 stroker
400 small block
turboing the current turd
buick 350...heard they put out mass amounts of torque back in the day.

Re: Kind of a noob question about the pontiac 301 turbo
 

Oh, well yeah. That makes sense.

Consider yourself blessed. You don't have to work with the turbo technology and fluid dynamics knowedge of 1980. You have much better stuff available to you than the best ---- money could buy in 1980. Pontiac used that Garrett heap because it was as good as it got. You can pick any crappy deisel turbo and it will whoop the hell out of the TB0305. You can also learn from the Pontiac engineers mistakes and DO NOT do a suck-through carb layout. It sucks.

By the way, here's what one of those ugly turbos look like, in case you or someone else hasn't seen one. Note how big around it is. Also, the turbine is massive. The turbo sat above the passenger valvecover with the turbine hanging off the side and the compressor centered over the intake. The funky 3-bolt aluminum flange mounted right to the intake manifold. A 90 degree albow attached to the compressor inlet, and that elbow held the Quadra-junk carb. Stock wastegate is 7 psi. The drivers side exhaust manifold bolted to a pipe that crossed under the engine and went into the passenger side manifold. That then fed up into the turbine inlet. So, drivers side exhaust went engine, drivers manifold, crossover, passenger manifold, turbine, then out to the ex system. Brilliant design. Actually, this is how Buick's turbo V6 engines did it too and they worked pretty well (at least the later meat-injected ones).

http://www.plastikhosting.net/upload...r/IMG_0051.jpg

http://www.plastikhosting.net/upload...r/IMG_0052.jpg

The next two pics are the monster TB0305 next to an IHI-RHB5-VJ17 (87-88 Thunderchicken 5-stick).

http://www.plastikhosting.net/upload...r/IMG_0053.jpg

http://www.plastikhosting.net/upload...r/IMG_0054.jpg

Here's a pic of what it looks like under the hood of a Turbo 301. Don't ever do it this way.

http://www.plastikhosting.net/upload...5aad314c_o.jpg

Re: Kind of a noob question about the pontiac 301 turbo
 

Look here. These dicks have had 2 Turbo 301 cars pass through their hands. Some good pics of what these lumps looked like, for those who might be curious:

http://www.classicresto.com/mambo/content/view/113/2/

http://www.classicresto.com/mambo/content/view/107/2/

Re: Kind of a noob question about the pontiac 301 turbo
 

they probably sound awesome when spooling open downpipe.. but suck ass once the noise wears off

Re: Kind of a noob question about the pontiac 301 turbo
 

Like I said just looking at the options. How does the turbo being mounted right next to the carb like that work? I don't understand that setup at all. But yeah I don't know lately I have been thinking I would be better off starting from scratch with a 350 crate motor from GM Goodwrench through Jegs.com it is like $1500 before shipping. I already have a holley 650 double pumper I could throw on there, as well as an edelbrock performer intake manifold, and a full exhaust system and be putting out like around 290 hp and like 370 lbs/ft torque at the crank. It wouldn't be a bad turbo motor either it only runs like an 8.5:1 compression. Maybe a T3 based turbo kit later on. It could be some big time fun. Especially when the bracket racing at the local track rolls around.

Re: Kind of a noob question about the pontiac 301 turbo
 

Stock 301 Turbo: There is a tube with a 90 degree bend that bolts to the turbine inlet. That tube goes out an inch or two, then turns 90 degrees straight up to the carb. The carb bolts to the tube in its regular sraight-up configuration right under the air filter in the last pic above. So the fuel goes from the carb, makes a hard 90 towareds the passenger side, then gets its ass kicked in the turbine, then is shoved into the intake manifold. Shitty design.

If you want my retarded ass 6.5 cents, I say buy the SBC crate motor. Unless you have the ability to build one yourself. Then just go buy an old Vortec truck/van motor and rebuild/refresh it. Edelbrock sells a Performer intake to put a 4-bbl square-bore on the Vortec head. It's like $150 or something. The Vortec head is actually pretty damn good for stock iron ----. Better than many aftermarket iron heads. At least as good as Dart SR's, maybe better. Plus, the Vortec motors used the plain old HEI distributors, which work very well and have millions of upgrade coils available. Hot ignition, nig-nog price. I love nig-nog prices. Possibly the cheapest way to make 300hp in the world. Then you turbo that bitch. Oh, and unless you find a T-3 with a HUGE turbine housing (and I mean ------- gargantuan), you are going to want a bigger turbo. Remember, if you are starting with a 300 horse motor, you can probably count on an easy 400 horses with a little positive manifold pressure. That's big turbo territory. You might want to look at a couple of T-3's or some Borg Warner bullshit or something. I don't know ---- about those big fuckers. The Cummins guys might be able to help you out there. They love big CFM's for cheap.

Re: Kind of a noob question about the pontiac 301 turbo
 

I think I am all but decided on the 350 crate. I know quite a bit about building motors but when it comes right down to it I would trust it a whole lot more if it was professionaly built then if it screws up chances are I have a warranty...But the motor would come first then I would focus on finishing the rest of the car so it was street legal before I started fabbing up a kit. Plus it would be nice to drive a 300ish horsepower Trans Am after driving my Civic for over a year and a half now. I saw a guy on here building a motor with a giant volvo semi turbo. That would be fun. Either way after it is street legal I will be hitting up the local bracket racing. Heck maybe I will win one or two and pocket some cash. That would be sick.