Woah! 20psi by 2800? That stage 3 head must really improve spool.

Do you happen to know the specs of this GT30R variant? I'm trying see how it compares to a "standard" GT30R. I'm interested in the wheel size, trim & A/R for both the hot & cold sides. I'm guessing a .63A/R on the hot side?

 

I don't. Dave would know but there is not any markings on the hot side. I think it is a smaller version but I don't have any problems hitting 30psi with it. I makes boost super easy all over the place, 5th gear highway hits 15lbs just cracking the throttle.

 

Looks like my number were off, I got some video of it this am. It was slower then expected but I am pretty sure it is what the car has been doing in the past. It all happens so fast I have trouble keeping track of everything. I did one 3rd gear pull from 2000rpm to 7900 to see what it would do here is how it looked:

3000rpm=5psi
3500rpm=10psi
4000rpm=19psi
4300rpm=23psi
4500rpm=25psi
5000rpm=26psi

With a very slight creep to 27psi by 5500 rpm. It will hold 25/26 in 1st and 2nd and only creeps to 27 in 3rd and 4th. I was a little suprised that the boost was only 5psi @3000 but it all happens so fast it is hard to watch the road and keep track of boost/rpm. The turbo hits really hard around 3500rpm and builds from there. I have the BR manual boost control set to hold about 25psi so the it looks like the last 1/2psi are a little boost creep. On a side note 3000rpm to 7900rpm (34.8mph to 91.6mph) took about 4.95 seconds.

 

That's still excellent spool up. I'd like to see the same comparision with the BR580BB. What size wastegate do you have?

 

Here is the vid from the third gear pull.

http://www.rrrefrig.com/evoweb1.wmv

 

Great amout of respect for you to come back and correct your statement after you could truly see, since you don't have any logging sorce it is very understandable to be off just a fraction of a sec and it be several hundred rpm. I am running the GT3076 with a TO4S compressor and I spool very similar to what you are doing with the AEM up to 19/20 psi by 4000rpm (pump gas). I gots to put together an alky setup to get that 26psi daily. Also need an upgraded head.

 

thanks for the vid, car is fast.

 

This wouldn't be a AMS kit would it? Have you run with a T04B housing at all?

 

It's a bit late, but sorry about that... I could have swore David had mentioned that early on...

 

Are you running a .82 A/R turbine housing?

 

No it is the RNR kit with their GT3052 which is a 3076 52lb wheel. I haven't ran any turbo with TO4B compresor. I honestly don't think I would want to go any bigger but I don't know what the exact size would be on the wheel in compairison. I am just running the TO4S cover with a 4" CA intake instead of the standard 3" TO4E.

 

I had actually meant to say 'E' rather than 'B'. I totally confused the two. Thank you for the clarification however!

 

no the .63ar

 

Thanks for the info. I have a GT3076 w/ a .60 a/r, 52 lb wheek, and 4" ported shroud compressor side, and the .82 A/R turbine. I am seriously looking at getting the .63 turbine side and after reading what you are spooling at I probably going to buy one.