Subed for updates also riceball also for the g25 turbo

 

Went ahead with a gt3071r retrofitted with a gtx billet wheel.

 

You will love your new Turbo set up Ryiin2 make sure you have at least 255 tyres on the rear

 

Cheers, Mark. I look forward to it, at this point damn near anything would have been a huge step forward from the t518z.

As far as tyres, sitting on a square 245 for now, but definitely thinking about upping the rubber in the back and going staggered again.

 

Here we are so on the left is the GT3071r t2/.86 AR with the GTX gen 1 billet wheel, and the old t518z to the right. Going to be mated to a pfab log manifold.

 

Looking good. When's the retune? Pump gas?

 

Thanks Nguyen365! Tuning on CA's crappy 91 for now, hopefully by the next week or two. In the future I will retune with e85.

 

Update: So the car made 312hp @ 8200 with 12lbs of boost on 91 octane and the new gtx3071r (t25/,86ar). After around 8200 the car would drop off and my tuner was concerned that there would be detrimental levels of valve flow so the limited is set to 8200.

Going to tune for e85 next week. Hoping to hit 350.

 

Is it the 91 octane thats causing it to be so low. Just expected a GTX30XX to make 400's at 12 psi easily. Got a pic of the graph?

 

Sure do, so the biggest issue is the amount of back pressure, the t25 and the log manifold are choking the motor specially at vtec so it had to be pushed to around 6800-7000. And way up after 8200 the car dips in power because it just can't breathe. I have a full 3in exhaust but it isn't doing too much because the t25 is a huge bottleneck. In the future if I were to upgrade again, I would not settle for anything smaller than a t3, infact I would ideally go t4 with a .82 a/r.