f-max did the same **** to me, I was able to tell when i first looked at the turbo. I sent it back to them and made them send me a stage 3 63 ar. My car feels strong, I haven't dynoed it yet but the torque steer pulls the steering wheel out of my hands.

 

Dustin, didn't you say you were hitting full boost about 4100 rpms? That seems kinda laggy for a smaller turbo.

 

I thought I was... but I went out today on the highway and I was able to hit full boost before 3500rpm... heh. I had never paid attention before I guess. My old turbo hit full boost about 4000.

 

Mine is stamped 20359....what the hell do I have?

 

Looks a LOT like my dyno run with an 0.48 on my GSR. Sucks, don't it?

 

nice airfuel ratio there

 

most turbos will have the AR stamped on the inside of the exhaust housing inlet, look there.

 

Dustin if you measure the I.D. of the turbine outlet it should be 2.25". Somewhat less than that for a Stage2.

It LOOKS like a Stage2 just judging by the excess machined flat metal around the turbine.

The housing LOOKS like a .48 too. .63's are more "beefy" looking....ha

 

Ditto same turbo I bought from Maxrev also. I hope it will be ok for my stock redline'n LS motor........

 

0.48 should flow plenty for a stock LS engine

 

Dustin. what are you going to be doing with these 2 extra turbos you have?

 

Dustin!! I always wondered why yours was putting out so low on the dyno especially on your setup and would imagine, you would be up par with Art or even more!! Sorry Art, not dissing you or anything.

Now, we'll see how much more you can put up with with the corrected spec turbo and for once, please run your car at Sac!!

 

Look on the inside of the turbine for the correct A/R number. Disregard the number on the outside.

 

It's a serious pain to pull the turbo off to see the stamp... Outlet is 2.25" maybe a little less, hard to get an accurate measurement. It's a .48 housing for sure.

I get full boost by 3500 with this turbo heh... so I know it's not the right one.

 

i had a .48 and went to a .63 i got the same rpm spool up with the .63 but the .48 had a lot more mid power and the .63 the power is more in higher rpms

 

What wheel though? I have no top end now ... hehe

 

I'm not surprised, better to go buy your own

 

Hey dustin,
Check out the chart in the link below in the T3 section labeled EXDUCER DIA.
You can measure the outlet diameter with some calipers, then take some feeler gauges and gently measure the gap from the blade to the outlet. Multiply the gap by 2 and subtract from the outlet measurement to obtain which stage you actually have. Or this...
~(2.250" - 2.122") / 2 = roughly .064" gap = stage 2 wheel
or...
~(2.250" - 2.229") / 2 = .010½" gap = stage 3 wheel
http://www.turboneticsinc.com/catalog/twheel.html

Good luck fella! I hope you get it all straightened out soon. I can't wait to see some real numbers, especially since you seem to do things the "right" way. I'm still diggin' your fuel set-up!
Take care,

[Modified by The Mick, 10:10 PM 3/21/2002]


[Modified by The Mick, 10:43 PM 3/21/2002]

 

I'm yanking the stupid turbo off tonight and measuring everything!

 

Atta-boy! I wouldn't take anybody's word for it (if there's a way to measure it). When I got my kit, it seemed like it was some big secret as to which trim level, etc. the GS-R Drag kit came with, so I measured everthing for myself. Now it's a known fact which trim they should come with. Unfortunately for you, somebody goofed twice.

Let me ask you this... what levels are you planning to boost to once you get everything squared away? I've been looking at several compressor maps and it appears to me that a T3/T04E "50" trim compressor and A/R .63 stage 3 turbine would be best suited (if not ideal)to a GS-R motor in the 10 to almost 20 psi range. I wonder why most people seem to prefer the 57 trim and 60-1? I know which one I'd choose. Just somethin' else to think about when you order your next turbo. Do the math and see which setup is best for your goals.

 

I want the 57trim because art has one

 

Did my dyno chart do it for you? hehe...

art