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Need expert help! ON twin turbo ideas.

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Old Nov 5, 2003 | 01:50 AM
  #1  
fast86's Avatar
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From: Schaumburg,IL
Need expert help! ON twin turbo ideas.

Ok. I already have 1 cast iron manifold (on the passageers side) it has a t4 with a .84 flows 780 cfms with an extrernal wastegate

Know I have to do custom work to the other side and I was thinkng of putting a turbal header 1.5 turbing to a DSM turrbo (small and flows 400cfm
My idea is haveing a small turbo on th drivers side for Spool up and to help decrease the lag.
And once its spooled the other turbo will start hitten boost.

First of will this work haveing to diffenent turbos?
Will it have any effects on how the car is runing due to diffenent flow rates on the left and right side.

This is going in a Stock TPI intake 350 with a small cam and 8.5 to 1 compression, with 64 cc Iron heads that flow ported o34 300cfm!
And would this be a problem to suppliy fuel to?

I have the other 2 turbos with t4 .87ar ,Should I get a dsm turbo?
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Old Nov 5, 2003 | 06:42 AM
  #2  
askulte's Avatar
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Joined: Sep 1999
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From: West Hartford, CT
Car: '89 Z28tt
Engine: Dart Little M Twin Turbo
Transmission: T56
I'm not a big fan of having different backpressure for different cylinders. That means some cyls will be making less power than other, and the rotating assembly will be slightly out of balance. <shrug>. Just my 2 cents...
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Old Nov 5, 2003 | 10:11 AM
  #3  
johnsjj2's Avatar
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Joined: Mar 2001
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From: Monticello, IN USA
Car: 1991 Z-28
Engine: 350
Transmission: T-5 (gonna buy the farm)
We do something similar to this on our engines we build at work. We run 2 small turbos, into 2 large ones. But, all 16cyl. are running the same backpressure. 8 feed 1 small one, and the other bank feeds the 2nd small turbo. You could do it this way. I think it was Mike Moran did this. Ran a quad turbo. If you had one that was properly sized, you could run all 8 into that, and have that feed into a much bigger one. I don't think the time, money, or effort would really help you though on a stock engine.
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Old Nov 5, 2003 | 02:08 PM
  #4  
kevinc's Avatar
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Car: 1982 Z28
Engine: LS1
Transmission: T56
Re: Need expert help! ON twin turbo ideas.

Originally posted by fast86
Ok. I already have 1 cast iron manifold (on the passageers side) it has a t4 with a .84 flows 780 cfms with an extrernal wastegate

Know I have to do custom work to the other side and I was thinkng of putting a turbal header 1.5 turbing to a DSM turrbo (small and flows 400cfm
My idea is haveing a small turbo on th drivers side for Spool up and to help decrease the lag.
And once its spooled the other turbo will start hitten boost.

First of will this work haveing to diffenent turbos?
Will it have any effects on how the car is runing due to diffenent flow rates on the left and right side.

This is going in a Stock TPI intake 350 with a small cam and 8.5 to 1 compression, with 64 cc Iron heads that flow ported o34 300cfm!
And would this be a problem to suppliy fuel to?

I have the other 2 turbos with t4 .87ar ,Should I get a dsm turbo?
This guy's a troll, BS'er, or whatever...seems like he takes his medications and gets quiet for a while, then returns with a different story when the pills wear off:

https://www.thirdgen.org/techbb2/sho...hreadid=204591
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