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Old 09-25-2010, 05:19 PM
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Turbo Charging a Chevy Small block

Hello all,
I was going to turbo charge my inline 6 for my 1954 Chevrolet 210 deluxe to keep sort of an original engine look but get some more power and build something different.

I kind of have my heart set on building a fuel injected turbo charged engine. So my questions are:
I want to buy forged internals for strength and to help ensure reliability. But, I don't know what type of piston tops I should buy.
I want to run about: 8.5:1 compression. I wouldn't be against running higher compression if the engine can handle the boost.
What combustion chamber size should be used with what piston style to achieve the boost friendly compression ratio?

I can't find much info. on turbo charged chevy engines. I am thinking that I should probably buy a engine that comes factory fuel injected. Thoughts?

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Old 09-25-2010, 08:58 PM
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What's your power goals? What do you plan to turbo it with?
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Old 09-26-2010, 09:20 AM
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Quote:
Originally Posted by turbolover
What's your power goals? What do you plan to turbo it with?
I shouldn't say I exactly have a power goal. Whatever I can squeeze out of the engine safely and reliably is fine. It's more about the feel from the engine and the experience from the build. But, I think 400-500 should be pretty easily attained.

On the last motor I turbo charged, I built everything myself for this engine. I ran between 8-9psi and never really had any issues. That was 10.1 compression but a much better engine inregards to the stock internals.

I don't understand what you mean when u say: What do you plan to turbo it with?

Like what turbo? I don't know
What turbo setup, single or dual? I think I have to go dual for packaging reasons.
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Old 09-26-2010, 09:54 AM
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Since your power levels are modest I would go with a tpi or lt1 intake on a 8:1 compression 350 with forged dish pistons and a hx35 turbo with a large external waste gate. Depending on the cam you should have 500hp by about 5000 rpm- in other words no lag and a LOT of torque. Be sure to run an intercooler if you plan on extended driving. Oil cooler as well.


You can get most of those parts in a good junk yard. Single turbos are easier to package- you just need an exhaust crossover in front to join the manifolds ahead of the turbo. A larger turbo would get you more power (this one is small for the app) but it'll lag a little more.
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Old 09-26-2010, 08:34 PM
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Quote:
Originally Posted by turbolover
Since your power levels are modest I would go with a tpi or lt1 intake on a 8:1 compression 350 with forged dish pistons and a hx35 turbo with a large external waste gate. Depending on the cam you should have 500hp by about 5000 rpm- in other words no lag and a LOT of torque. Be sure to run an intercooler if you plan on extended driving. Oil cooler as well.


You can get most of those parts in a good junk yard. Single turbos are easier to package- you just need an exhaust crossover in front to join the manifolds ahead of the turbo. A larger turbo would get you more power (this one is small for the app) but it'll lag a little more.
Would you buy a Carburated engine and convert it to fuel injection? Or would you start with a fuel injected engine?
That's the first question I need to answer. I was thinking of starting with a Carb'd engine and convert it to fuel injection, something similar to what was done on the Megasquirt website. The advantage I see with this route is, lower cost.
But a rebuild would almost absolutely be necessary.

Buying a Newer/modern engine might mean I don't have to mess with a rebuild and focus time and energy on the turbo setup and wiring the damn thing.
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Old 09-26-2010, 09:43 PM
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Switching carb to FI is $1500 and up. Powerjection III and FAST EFI are the cheapest and also two fot he easiest to program.

However, for $1500 you can get a used LT1, a little more and you get a used LS1. Great candidates for turbo if you're staying under 600HP.
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Old 09-27-2010, 07:00 AM
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Quote:
Originally Posted by Landshark928
Switching carb to FI is $1500 and up. Powerjection III and FAST EFI are the cheapest and also two fot he easiest to program.

However, for $1500 you can get a used LT1, a little more and you get a used LS1. Great candidates for turbo if you're staying under 600HP.
Around here either engine will run you less than half that with an ECM, about $500 without one... And either engine does respond better and is a better design.

I would start with a factory EFI'd engine, probably an LT1 or TPI setup for cost/convenience considerations. With mild boost either can get to 500hp, both will require new pistons.
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Old 09-27-2010, 01:07 PM
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Here is a link to a guy that we helped out with a block and rotator and he claims 850 horse here are some videos of his car.

http://www.youtube.com/watch?v=FjDyK...eature=related

http://www.youtube.com/watch?v=UCjJ3...eature=related

http://www.youtube.com/watch?v=V55WOYTIbGs
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Old 09-27-2010, 08:52 PM
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Quote:
Originally Posted by turbolover
Around here either engine will run you less than half that with an ECM, about $500 without one... And either engine does respond better and is a better design.

I would start with a factory EFI'd engine, probably an LT1 or TPI setup for cost/convenience considerations. With mild boost either can get to 500hp, both will require new pistons.
What are the transmission options for the tpi and lt1? I was thinking of using the TH350 and building it to handle the power.
The other transmission out there are rather large in size and would require me to cut up the floor pans ALOT more than I would like. But, sometimes building a TH-350 to handle that much power doesn't make sense cost wise. Sometimes a Th-400 would be a cheaper alternative.

Thoughts?

I found a tpi engine and transmission package, pretty good price. I donno if I should jump on it, or if I should finish some of the suspension work on the car first.
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