Twin 67/66 .96ar on a 5.3?
11-12-2018, 02:10 PM
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Twin 67/66 .96ar on a 5.3? I’m in the process of just getting stuff together for my twin turbo build. I have 2 options here. (Already have the turbos)
I have a 370 that’s in the car now, that I could forge rebuild and run with my twin 67/66 turbos.
Or I could sell it because I have a 5.3 laying around that was given to me. Punch it out to a 5.7 rebuild of course and forge it. Selling the 370 would help me out a ton cost wise.
I will have a stage 2 or 3 ljms turbo cam in either build.
Would the 5.3 punched to a 5.7 be able to spool that turbo?
I have a 370 that’s in the car now, that I could forge rebuild and run with my twin 67/66 turbos.
Or I could sell it because I have a 5.3 laying around that was given to me. Punch it out to a 5.7 rebuild of course and forge it. Selling the 370 would help me out a ton cost wise.
I will have a stage 2 or 3 ljms turbo cam in either build.
Would the 5.3 punched to a 5.7 be able to spool that turbo?
11-13-2018, 02:31 PM
#2
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Of course, the question is will it spool when you want it. Those turbos are on the large side for a 6.2 (some would say perfect lol). You are definitely giving up some bottom end and mid-range compared to smaller TT's however you can gear it to suit your combo and make it fly. It'll have nasty top end as it hits, so just gear for that i.e. Once tuned on dyno see where boost hits hard and change the final drive ratio (if necessary) so each gear hits right in the sweet spot. If auto, you want a converter that stalls right there too... may not be daily driver friendly tho lol
11-14-2018, 09:07 AM
#3
Selling the 370 is not going to save you any money if you are just then going to take the 5.3 and punch in out to 347 and forge it......if the 370 has good internals just keep it and run that with the turbos you have.
11-14-2018, 11:57 AM
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11-14-2018, 12:23 PM
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right now the 370 has a BTR stage 4 cam. Too much overlap? Lol it would be nice if I could reuse it because it’s literally brand new.
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11-14-2018, 12:26 PM
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I had it rebuilt about 1500 miles ago with brand new speed pro pistons flat top, stock connecting rods, stock crank. But I’d like to go forge to be safe
11-14-2018, 02:04 PM
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11-14-2018, 02:24 PM
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What is the power goal? I'd give that setup the business, I didn't bend a Gen 4 rod until I deleted my wastegate... I like to live! lol
The 235/242 cam? That's pretty close within a degree or two to what I've run in 6.0 and 5.3 twin turbo setups. Not optimal but if your not max effort you probably wont notice any difference.
The 235/242 cam? That's pretty close within a degree or two to what I've run in 6.0 and 5.3 twin turbo setups. Not optimal but if your not max effort you probably wont notice any difference.
11-20-2018, 12:38 PM
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