Twin Turbo 350 - Lateral-g Forums

brianjw4 · #1 12-20-2006, 02:13 PM

I'm leaning towards doing a twin turbo setup in my 69 camaro and I have a few questions about the motor as a foundation.

I'm planning on using a vortec 350 small block and will likely build from the ground up. I'm wondering what special parts i need for the build. Steel crank is a given, but what about rods, pistons, and heads and compression ratio?

**jonny51** · #2 12-20-2006, 02:56 PM

Here is my opinion

Forged crank
Forged rods
Forged pistons,good idea to coat them too.
Compression 8.1-9.1
Turbo spec cam
Heads any decent flowing head (from what I read and was told there not as important in a boosted motor as N/A motor)
If you are running a carb you need a blow thru type.

brianjw4 · #3 12-20-2006, 03:44 PM

Great. Thanks for the input. I do have one other question as far as fuel delivery, if I use a carb will I need a pump and regulator setup?

I am definitely contemplating a holley EFI setup as well.

nitrorocket · #4 12-20-2006, 04:35 PM

Are you stuck on that motor?? An ls1 can be had for $2500 turn key with duel injection and all. They are all aluminum, have 400 hp stock, and will make 650 hp without opening a valve cover if you bolt on turbos.

Just food for thought.

rwhite692 · #5 12-20-2006, 04:42 PM

You may want to check out the Banks site for more info:

http://www.bankspower.com/Tech_twinturbo.cfm

Download and read the Twin-Turbo Power Guide (.pdf file).

Specifically, pages 26-27 deal with engine component recommendations. -Rob

deuce_454 · #6 12-20-2006, 04:51 PM

Quote:

Originally Posted by nitrorocket

Are you stuck on that motor?? An ls1 can be had for $2500 turn key with duel injection and all. They are all aluminum, have 400 hp stock, and will make 650 hp without opening a valve cover if you bolt on turbos.

Just food for thought.

well a 2500 ls1 is more like 305 Hp, and it wont last forever without forged pistons at 650 Hp... but i am doing exactly that combo my self, schwartz can make you a pair of TT ls1 headers for about 1k

brianjw4 · #7 12-20-2006, 04:54 PM

Thanks for the link.

I have thought about the LS1, a lot. But if I do that then I have to use a new tranny and the ls1 conversion seems like it's a bit of work. I currently have a muncie trans in the car and was planning on using that. The ls1 is very tempting though.

boonedog · #8 12-20-2006, 05:05 PM

there is nothing wrong with a good old 350,tons of parts available at resonable prices, and you can build them bullet proof.

nitrorocket · #9 12-20-2006, 06:23 PM

Quote:

Originally Posted by deuce_454

well a 2500 ls1 is more like 305 Hp, and it wont last forever without forged pistons at 650 Hp... but i am doing exactly that combo my self, schwartz can make you a pair of TT ls1 headers for about 1k

The motors make closer to 400 hp at the crank in stock form. Head and cam takes it up to 500.

Also, ther is no "conversion" . You bolt it in with the correct motor mounts, hook up your electric fuel pump, get some radiator hoses, conncet the wiring, and start it up! Far easier then an aftermarket EFI setup.

brianjw4 · #10 12-20-2006, 09:03 PM

Sounds easier than it is I'm sure, but still definitely an option on the table. I've read quite a bit about guys that have done the conversion in the first gens and I know what has be done for the LS1 to go into my 69. Not sure yet.

What I am sure about is that I want twin turbos