I've been wanting to build a turbo 383 for my chevelle. I have a two bolt 350 right now but want to do it right. I need to destroy the local rice and show them what some turbo american muscle can do.

I have a descent 12 bolt rear w/ posi and 3.31's. A th350. But want to replace motor and tranny, I need overdrive. I would like at least 400hp at the wheel on pump gas and low boost and be able to go to the track and put out 550 or 600 would be great.

Should I run a single or twin turbo setup what are pro's/con's? What type of overdrive tranny can handle this hp or is my only option gear vendors unit? Any one looked into a 4L-80E? What kind of bottom end parts should I run I know it needs to be forged, 5.7 or 6.0 in rods, pro's/con's? Can I buy a low compression short block? Probably AFR heads how big? And a fuel injection setup? How much fuel system do I need? Can I just sump my current tank?

Can I do motor/trans and turbo/intercooler/fuel system for 8k? Is it possible?

Thanks mike

I don't think 400 horse with a turbo'd nicley done 383 would be a problem at all. You could do a 2004r or 700r4 for OD. The 2004r can handle more power, I think. You can research that in the tranmission forum. Depending on what RPMS you want to run out, you could do 3.73's.

http://www.getpower.com/twin-turbo-products.cfm

you need to post some pictures when you get that baby done. *drools* sorry graemlins/thumbsup.gif

When you're ready for a cam, let me know. Turbo-charged engines require special cams. I do turbo cams in hydraulic, hydraulic roller, solid, and solid roller versions.
Twin-turbocharged solid roller engines have trouble blowing through the converter, because BHP can easily get over 1200 up to 1600....

UDHarold

drools . . . . :D graemlins/thumbsup.gif

Originally posted by stealth71:
Should I run a single or twin turbo setup what are pro's/con's?Twin turbos let you have one turbo thats spools quickly and provide slow RPM boost, then the other turbo can spool up at higher RPM and give more boost.
What type of overdrive tranny can handle this hp or is my only option gear vendors unit? Any one looked into a 4L-80E?I wouldn't trust a 2004R or a 700R4 behind this engine. The 4L80E would survive, but requires a $500 stand alone computer to run it. It would allow you to tailor the shifts to any point you could ever want though....

What kind of bottom end parts should I run I know it needs to be forged, 5.7 or 6.0 in rods, pro's/con's? Can I buy a low compression short block? Probably AFR heads how big? And a fuel injection setup? How much fuel system do I need? Can I just sump my current tank?Id go with a 6" fully fogred bottem end myself. Don't just buy a shortblock. AFR heads in the 200+cc range.

Thanks for the replies the 2004r I was looking at is rated to 800hp : http://www.cpttransmission.com/products/products.php?qtype=2004R&qvendor=&qproduct=&order=price_sale&ding=DESC&qcategory=Transmissions&view=page

I really want a turbo setup but have also been looking at Procharger P-1SC. Lokks like this thing can build some ponies.

The centrifugal blower might be cheaper because they have kits already made for you but I think a turbo would be cooler myself.

I was browsing through the threads and saw this and another one about odd engines.

I wouldn't build a turbo 383. To me, a 383 is meant for torque w/ about a mid 6000 rpm limit. Something that would be an ideal turbo motor would something that would rev easily and good flowin heads. From that assumption, I'd take a 400 block and stick a 68+ 327 crank in it and make a 347. You'd have torque + the piston doesn't travel too far so it'd want to rev and spool that snail up.

I think I'm going with a procharger now P-1SC. There is a 68 Chevelle in the Procharger brochure I have here. Specs:
Supercharger: P-1SC
Intercooler: 3 core
Bypass Valve: Pro-Flow
Boost: 10psi
Engine: 383 Small Block
Pistons: Pro-Tru Forged
Crank: CAT 5140 Steel
Rods: CAT 4340
Heads: Dart Iron Eagle
Intake: Victor Jr.
Carb: Holley 750
Fuel Pump: Mechanical
Block: factory 4-bolt GM
Cam: Hydrualic Flat Tappet
Options: ATI A/C Bracket
Max RWHP: 572 @ 6200

Looks ok to me.