4.8 76mm 7675 vs 67mm
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Teching In
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4.8 76mm 7675 vs 67mm I have 99 C5 with an aluminum 5.3 block and floating pin 4.8 rotating assembly, ls6 cam, ls7 clutch and 2003 C5 Z06 transmission and rear end.
I've searched for a while and have narrowed down to 2 choices the on3 ceramic ball bearing 67mm or the 2nd gen 76mm 7675 turbo.
My goal is a daily drive that makes something close to 600 or 700 max rwhp, smooth idle (ls6 cam) and not too much turbo lag but I also want to be able to spin it to 7k.
Which one would you recommend on a single front mount?
I've searched for a while and have narrowed down to 2 choices the on3 ceramic ball bearing 67mm or the 2nd gen 76mm 7675 turbo.
My goal is a daily drive that makes something close to 600 or 700 max rwhp, smooth idle (ls6 cam) and not too much turbo lag but I also want to be able to spin it to 7k.
Which one would you recommend on a single front mount?
I believe that 67 only has a 65mm turbine so probably not ideal. Get a 7275 from turbonetics or pte if you want better spool. You can get a cast wheel pte for for cheap or the Borg's s366 or sxe's etc.
My Turbonetics T7875 isn't too bad when it comes to lag.
Since I've started street racing it I've noticed it does have a little lag but nothing some light brake boosting doesn't fix lol.
It'll pull cleanly to 6,500 rpm on my H/C LS1, maybe higher but that's as high as I'll go currently.
My vote would be any variant of a 7675 turbo, T-netics, PTE maybe even VS Racing?
Since I've started street racing it I've noticed it does have a little lag but nothing some light brake boosting doesn't fix lol.
It'll pull cleanly to 6,500 rpm on my H/C LS1, maybe higher but that's as high as I'll go currently.
My vote would be any variant of a 7675 turbo, T-netics, PTE maybe even VS Racing?
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Thread Starter
Teching In
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I guess I better copy and paste the turbo specs from their website. It looks like the 76mm is a good match for my build. But I will also look up the other turbos previously suggested. Thanks for all the feedback guys.
On3 2nd gen 76mm 76/75 turbo
On3 67mm ceramic ball bearing turbo 67/65
Cold Side
On3 2nd gen 76mm 76/75 turbo
- Anti Surge Compressor Cover
- 4″ Inlet
- 3.0″ Outlet
- CNC Machined Billet Compressor Wheel
- 1/8″npt Port For Boost Reference
- 75mm Turbine
- 3.0″ V-band Outlet
- T-4 Flange
- .96ar
On3 67mm ceramic ball bearing turbo 67/65
Cold Side
- Compressor Wheel 67mm
- .70 a/r
- 4” Inlet and 2.5” Compressor Outlet
- Inducer- 67.05mm
- Exducer- 84.10mm
- Exhaust Housing T-4 Flange
- .96 ar Exhaust Housing Standard, .68ar Housing Optional
- 3.0″ Vband outlet
- Inducer- 74.5mm
- Exducer- 65mm
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Since you have included a super mild cam and the words "daily driver" in your post, I would recommend the 67mm. Most of this forum skews much more toward racing than daily driving, so I doubt many others will share this opinion.
Thread Starter
Teching In
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I got in enough trouble with the stock LS1 by being accused by a cop for racing a bimmer I never saw.
Last edited by 99NassauC5; Sep 19, 2017 at 04:56 PM.
The power came on like a light switch and was really difficult to modulate.
The T7875 is way more linear and makes more power at a lower boost level.
I don't think the S366 is comparable to the TC7868 but that's just my input.
Thread Starter
Teching In
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