TC7875 with 1.1ar
08-26-2014, 10:10 PM
#3
Pretty simple... anyone running a single turbo tc7875 1.15 ar on a ls2 based 402...
I was thinking forged ls2 or 402 front mounted turbo on a cts v1... with the upgraded 75mm exhuast wheel vs the 68mm... anyone running that turbo on a 400plus motor
I was thinking forged ls2 or 402 front mounted turbo on a cts v1... with the upgraded 75mm exhuast wheel vs the 68mm... anyone running that turbo on a 400plus motor
08-27-2014, 09:20 AM
#5
running a 219/230 .605 .604 117LSA in my ls2 (ls3 top)
was thinking maybe 224/236 .620 .620 116LSA on the 6.0L and maybe same specs for a 402... want daily friendly grind. currently 30 mph I get no bucking or surging in 6th. can skip shift if I want to 1-4 at 17-20 mph.
basically wanna do a forged bottom end. if back pressure wont be an issue rather have a few more cubes to move a 4200 lb ctsv
was thinking maybe 224/236 .620 .620 116LSA on the 6.0L and maybe same specs for a 402... want daily friendly grind. currently 30 mph I get no bucking or surging in 6th. can skip shift if I want to 1-4 at 17-20 mph.
basically wanna do a forged bottom end. if back pressure wont be an issue rather have a few more cubes to move a 4200 lb ctsv
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09-02-2014, 05:50 PM
#9
The 7875 is a T-series, the TC series (60-series) is limited to the 68mm turbine wheel.
From our experience, most seem to run into excessive drive pressure on these 75mm turbine wheel units at the 383ci mark and up if you want to base it off displacement. I would recommend a turbo with a larger/higher flowing turbine wheel for sure on something with over 400ci (unfortunately this comes with the drawback of the turbo being physically larger as well for space constraints) Will the 7875 work, absolutely, just not as efficiently as it should and you will most likely see the effects of that in the upper RPM range.
From our experience, most seem to run into excessive drive pressure on these 75mm turbine wheel units at the 383ci mark and up if you want to base it off displacement. I would recommend a turbo with a larger/higher flowing turbine wheel for sure on something with over 400ci (unfortunately this comes with the drawback of the turbo being physically larger as well for space constraints) Will the 7875 work, absolutely, just not as efficiently as it should and you will most likely see the effects of that in the upper RPM range.
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09-03-2014, 10:16 PM
#11
Funny you say that as I had a pt88... was going to locate it were the battery was, but under the car seems more promising. Its a heavy street gen1 V, so fast spool and compact is limiting on size.402 would be nice off boost Iim leaning towards 10.5 forged 6.0L ls2 with meth. Any draw backs of having the divided 1.15 ar housing?if I remove the divider I doubt it will give more power as the limiting factor is the 75mm exhaust wheel. Have a full 8.8 irs cs rear end... so if everything is rated about 1000hp...so a forged ls2 with say 15-18 psi should get me 900ish crank I would think. At a 10.4 static right now making 525 estimated with 18 percent loss puts me at 450rwhp, so take 10 degrees making it 475 ish x 2 15psi should yield me 900 I would think... maybe 750 rwhp.
im looking for 700 to 850. Rwhp.
im looking for 700 to 850. Rwhp.