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Old 03-15-2003, 10:48 PM
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Arrow what do i need to build a twin turbo 350

I want your opinions, What do I need to build strong enough to withstand twin turbo and a bolt on Fuel injection system. I don't know a lot about engines and I am having a friend build it for me.

Also, can you post any links that you have for specs on racing engines.

I interested in building a twin turbo 350 for my 86 Chev 1/2 ton and doing some major mods to the truck besides the normal.. I'm not dropping it or anything like that. Its going to look like a sleeper, and walk on by you. Or at least thats what I'm hoping. I know there is enough room in there to put this under the hood.

Thank you

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Old 03-16-2003, 06:26 AM
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Good bottom end parts are a good idea. 4340 crank and rods, and forged pistons. If you keep the rpms around 5000 you could forgo the forged crank. As for the FI, there are no bolt on FI systems that are available that are designed to work with turbos. It takes a custom tuned setup. I would not try this with the limited knowledge you say you have. A blow through carb setup is much easier to setup and tune. It is also much cheaper. If you start hanging around autos.groups.yahoo.com/group/blowthruturbo, and <a href="http://groups.yahoo.com/group/BLOWTHRU]here[/URL] you will learn alot. I will suggest that you hang around for a couple months and learn before you start asking questions. Most of the guys are very knowledgable but very intolerant of "newbie" quesiton. They can help you through the entire build up. Also you need to do some reading. "Turbochargers" by Hugh McInnes and "Maximum Boost" by Corky Bell should be a prerequisite to any turbo build. They will tech you all the basics so you understand what it is you are taking on. It is fairly complicated and you should really understand what you are getting into.

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Old 03-16-2003, 01:18 PM
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A lot depends on the amount of boost you intend to use and your rpm limit. Up to about 10 psi and 5500rpm you can use a properly assembled standard bottom end but add some forged pistons. Make sure the pistons have oil drainback HOLES, not slots,as the slotted type tend to pinch up with slight detonation.
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