Twin sizing for built 6.0L
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Twin sizing for built 6.0L I have a 370ci iron block that I originally built for NA but impulse led me to place a deposit on the HS twin kit.
Stock crank, forged H-beam rods, wiseco +4cc forged pistons. ~ 11.2:1 CR
Rings are gapped .026" top / .028" bottom
236/246 110 .612/.612 LSX cam
98 Camaro with RXT, T56, 35 spline 9" w/3.70 gears, 28" tire.
I know its not ideal but I would like to leave the setup alone for now. My short term goals are to hit 600-650whp at 8-10lbs until I am more confident in my ability to drive with more. Maybe after I'll build a new bottom end to lower the CR. I'd really like to have the turbos light off by 2500rpm, if not sooner. I'm worried that if I go too small though, I'll choke on the top end because of the CR and big cam.
The VSR turbos that I have been looking at are cast 61/62 T4 .82ar, or cast 67/65 T4 .96ar. Are either of these a good match? I know it's not much of a budget, but I'm trying to stay under $800 for the pair.
Stock crank, forged H-beam rods, wiseco +4cc forged pistons. ~ 11.2:1 CR
Rings are gapped .026" top / .028" bottom
236/246 110 .612/.612 LSX cam
98 Camaro with RXT, T56, 35 spline 9" w/3.70 gears, 28" tire.
I know its not ideal but I would like to leave the setup alone for now. My short term goals are to hit 600-650whp at 8-10lbs until I am more confident in my ability to drive with more. Maybe after I'll build a new bottom end to lower the CR. I'd really like to have the turbos light off by 2500rpm, if not sooner. I'm worried that if I go too small though, I'll choke on the top end because of the CR and big cam.
The VSR turbos that I have been looking at are cast 61/62 T4 .82ar, or cast 67/65 T4 .96ar. Are either of these a good match? I know it's not much of a budget, but I'm trying to stay under $800 for the pair.
Last edited by bj241205; Dec 11, 2019 at 09:48 AM.
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From: Norn Iron
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I decided on twins for quicker spool. I was already removing ABS, AC & PS, so space wasn't a concern.
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From: Norn Iron
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That cam has a ton of overlap for a TT street setup stick car. You'd pick up spool and boost with a smaller cam that'll drive better. Id care less about which of those turbos to pick and more about your cam.
Where are you finding H/C swaps that approach 600whp (and are street drive-able)? Short term(1-2 year) goal is the 600-650whp, but I'm not going to pretend that I won't turn it up at some point. I'm just trying to take it in steps so I don't destroy the car or myself right away.
I decided on twins for quicker spool. I was already removing ABS, AC & PS, so space wasn't a concern.
I decided on twins for quicker spool. I was already removing ABS, AC & PS, so space wasn't a concern.
If all you want is 600-800hp a 76mm will be like a lightswitch on an 11:1 370. You can cam twins more like an NA car, but for a single I would back the cam down a bit.