dfl701
1/2 ton status
if going with a 5.3 i would just do a supercharger instead of a turbo
CK5
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Questions about turbo setups.
- Thread starter CherryK5
- Start date
bailey9r
1/2 ton status
better learn all about BLOW THRU Carbs.
Id luv to do a turbo setup. My idea would be to find a 1980 Trans am with the 400cid Turbo'd motor. just drop that in.
the 400 was a N/A motor, the turbo TA was a FI 301
badmix
1/2 ton status
the 400 was a N/A motor, the turbo TA was a FI 301
Ahhh. Man, I couldve swore they were 400s. oh well. Still would be cool. I wasnt aware they were FI though. hmm, oh well. Thats why Ive gotta research more. lol.
bailey9r
1/2 ton status
Nope, my bad it was a carb in 80 it was the later anniversary turbo model that was fi
btw they had two big blocks that year the 403 olds boat anchor labeled "6.6 liter on the hood and the screamer (well, for the times) 400 pontiac labeled "ta 6.6" on the hood, only available with a four speed manual.
There is no such thing as a Pontiac "big block".
Martin
Martin
1BEATK5
1/2 ton status
no fuel injection on any 301. and that was a pathetic turbo system. all you hear under boost is spark knock. thats why they didnt last too long when driven hard. the tops of the pistons would be eaten away down to the top rings. ask me how i know
mpi is the only way to go with a turbo. laptop tuning is easy once you figure it out. spending a ton of $ on a blow threw carb doesnt make sense with all the f.i capability.
mpi is the only way to go with a turbo. laptop tuning is easy once you figure it out. spending a ton of $ on a blow threw carb doesnt make sense with all the f.i capability.
Jessie James
1/2 ton status
Yeah, I can't imagine why anyone would try to turbo with a carb. But again, I read that book by Corky Bell... hint, hint.
Also, do you plan on rebuilding your engine to have low compression pistons? Do you have a 4 bolt main block (you should)? You should probably use forged pistons and rods, and heads and a cam designed for forced induction. You also will need a new high flow fuel pump, and a carb which can deliver more fuel under boost as well as being air tight.
Are you going to add an intercooler? I can't imagine running a turbo without one.
BTW, expect this to cost in the neighborhood of $5k to $10k or more to be done and work right.
Hey, look at this, this appears to be a bolt on supercharger kit designed for carb vehicles:
http://www.vortechsuperchargers.com/product.php?p=138&cat_key=13
Another link. I saw this years ago, this is a guy who shows step by step how he put turbos on his Chevy truck.
http://www.mez.co.uk/turbo1.html
Also, do you plan on rebuilding your engine to have low compression pistons? Do you have a 4 bolt main block (you should)? You should probably use forged pistons and rods, and heads and a cam designed for forced induction. You also will need a new high flow fuel pump, and a carb which can deliver more fuel under boost as well as being air tight.
Are you going to add an intercooler? I can't imagine running a turbo without one.
BTW, expect this to cost in the neighborhood of $5k to $10k or more to be done and work right.
Hey, look at this, this appears to be a bolt on supercharger kit designed for carb vehicles:
http://www.vortechsuperchargers.com/product.php?p=138&cat_key=13
Another link. I saw this years ago, this is a guy who shows step by step how he put turbos on his Chevy truck.
http://www.mez.co.uk/turbo1.html
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1BEATK5
1/2 ton status
Huh?
Yes there is.
The 400 is, the 455 is.
Do you live under a rock?
what he is saying is that all pontiac engines are the same size externally. all heads/intake/exhaust/ will fit all size engines. except 301 stuff is odd ball.
the only diff is 421-428-455 engines use bigger main bearings
bailey9r
1/2 ton status
yea i know what you mean but i wouldn't exactly call it a small block either, at about 200 lbs heavier than a 301 i just think of 400-455 as big. my ra 4 ran big anyway
Cbolton78
Registered Member
Spend some time on the TheTurboForum.com. Go check out the blowthrough carb setups.
CherryK5
1/2 ton status
Well its a crate motor from gm performance, and it has forged rods and pistons already in it. The motor is good for 400 horsepower easily, im just power hungry and still want more.
How bad would it be to turbo a 10:1 motor though? i never even thought about that.
Huh?
Yes there is.
The 400 is, the 455 is.
Do you live under a rock?
No, I do not live under a rock, and no, there is no Pontiac "big block".
Martin
Jessie James
1/2 ton status
That's not exactly the ideal compression ratio to try to turbocharge. It will significantly limit how much boost you can use, probably in the range of 5 PSI max.
Turbo engines work on 9:1 compression or less with far better results. Look around and you will see most people using 8:1 - 9:1 for their turbo engine, and with good reason. Forced induction = high pressures = high heat = detonation = dead engine.
I really cannot stress how much you NEED to buy the book Maximum Boost. The MASSIVE wealth of information therein will FAR surpass anything people on forums can tell you. If you cannot afford $20 to educate yourself about doing a turbo system properly, then you can't afford to turbo your truck. Go buy it!
Expect to spend more on engine managment and lower boost with those compression ratios.
One of my previous cars was a 98 gsr integra which had an 11:1 compression ratio. I ran 10 lbs of boost with a roots style supercharger. 260hp out of a 4 cylinder was great. I'd love to Supercharge my NSX but they want 10K for the SC. I'd prefer to spend my money on more toys then a SC
rigpig on juice
Registered Member
Here's my build thread. http://coloradok5.com/forums/showthread.php?t=191708 It's a twin turbo, but all the supporting systems are the same for all boosted engines.
Properly designing and building a turboed engine is quite an undertaking. Check out turbomustangs.com and yellowbullet.com. They are both a wealth of knowledge.
Just pontiac Small journal 400 and down and large journal 421- 455
vinman1029
Newbie
I don't think they turboed the 400 just the 301.
