The Sr20/Sr22vet thread

[Yellow4g63]

Originally Posted by insa

Interesting is the boost falling in the higher RPM's? the power is falling slowly to 7500 or did you adjust the cam gears to get it that way?

[RalliartRsX]

Originally Posted by Yellow4g63

Interesting is the boost falling in the higher RPM's? the power is falling slowly to 7500 or did you adjust the cam gears to get it that way?

A few things

- "60lb" turbo on 93 Octane, so no surprise to see it falling off up top
- P12 cams may be holding him back up top.
- Boost taper up top

Otherwise, this is a very wicked dyno! Love everything about it . 300+ ft lbs over 4K (and @ 3600 at that) is fantastic and into V8 territory

[d9m13n]

Holy hell, thanks for posting your dyno. My setup incorporates a single scroll EFR 7163 .85 indycar turbo, and I was afraid I wouldn't be able to push 550 wheel out of it. This gives me a lot more confidence that it's the right turbo for my goals, especially since ill be on e85. Hopefully I dont suffer too much more with spool compared to your twin scroll/smaller a/r setup.

[insa]

Originally Posted by d9m13n

Holy hell, thanks for posting your dyno. My setup incorporates a single scroll EFR 7163 .85 indycar turbo, and I was afraid I wouldn't be able to push 550 wheel out of it. This gives me a lot more confidence that it's the right turbo for my goals, especially since ill be on e85. Hopefully I dont suffer too much more with spool compared to your twin scroll/smaller a/r setup.

Cheers. I guess you will be fine and reach your goal with E85. Keen on seeing your dyno sheet one day.

[insa]

Originally Posted by Yellow4g63

Interesting is the boost falling in the higher RPM's? the power is falling slowly to 7500 or did you adjust the cam gears to get it that way?

Nope, no adjustments.

Originally Posted by RalliartRsX

A few things

- "60lb" turbo on 93 Octane, so no surprise to see it falling off up top
- P12 cams may be holding him back up top.
- Boost taper up top

Otherwise, this is a very wicked dyno! Love everything about it . 300+ ft lbs over 4K (and @ 3600 at that) is fantastic and into V8 territory

Yes, I think so too. Overall it's a pretty small turbo and given the compression and slightly increased capacity, we expected this to happen... everybody "warned" me that the turbo would be too small, but it's a trade off I'm willing to accept for the response and drivability... Not only chasing numbers.
Very keen on trying a bigger turbine one day or see what more we can do with Ethanol. Had no money at hand for a proper flex fuel tune tbh. ;(
Btw there's a speed sensor installed and we were very far away from maxing it out.