budget twin build plan, input welcome

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Apr 28, 2010 | 08:01 AM

#21

SS101

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Quote:

Originally Posted by smokinHawk

A 347 doesn't have a limit of 700rwt

also if your wanting 800rw the I'd go around the 62 mm turbos if you want two turbos.

point taken. its not necessarily a limit, but i can safely run 700rwtq and not be giving up too much potential. on a 347 i feel like id be getting into the upper 600s and lower 700s mostly on the turbos alone, were on a 427 id be leaving some considerable power on the table at only 700rwtq

what a/r would you recommend for twin 62's? i was thinking something in .52 to .68 range for the 60's, probably on the lower end to help keep the lag down?

Apr 28, 2010 | 11:36 AM

#22

smokinHawk

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.68's or more.

Apr 28, 2010 | 11:42 AM

#23

Phil99vette

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Quote:

Originally Posted by SS101

okay so i've put together a plan on paper and am looking for some input before i unleash the gods of visa.

turbos: modular turbo twin kit IF THEY EVER RELEASE IT!!!!! with ball bearing TC76's

motor: forged 347 short block (see question below), PRC stage 2.5 ls6 heads, ported ls2 intake, holley 90mm tb, VA speed turbo cam (see question below).

questions below:

1. should i go with diamond or wiesco pistons? i hear that diamonds may be quieter (this is going to be a street car) but the wiescos are made and finished better? i'll probably end up going with eagle or scat rods.

2. are these the right size turbos for my application (street car and road racing)? or should i go with 67's or maybe 78's??

3. do you think the VTC-1 or VTC-2 would be a better cam for me?

4. what do you think the max power i can make out of this setups is? which component(s) is holding me back the most?

thanks in advance for any advice you can lend!!

Have shawn build your shortblock to go along with your cam. The littlebit extra you pay for his motor pays off this this type of knowledge.