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Old 08-01-2007, 02:07 PM   #1
oneoverWRX
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Default Axis Stg5 perrin 3082r

Car was tuned at p and l by jorge. 93 pump and c16 maps
Mods

Axis stg 5 8.8:1cr
wrx heads w/ stg 1 axis package
kelford cams 278/272
No porting
Perrin 3082r kit
ultimate racing fmic
dual walbros
1000cc injectors
aem ems

Car made 349 on pump and 20-21 psi and 462 on c16 at 30 psi.
Peek torque is at about 5500 rpm.

Inside the dyno room the temp was 99.x deg.

I will try to post the graph a little later.

Has anyone else had any issues with this turbo being so laggy? what did you do to make it better? change exhaust housings?

Thanks
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Old 08-01-2007, 02:10 PM   #2
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Could the lack of AVCS be a bottleneck? or perhaps an issue with how the pre/post FMIC piping is run? Also, ambient temps were high. While I know that can affect overall output, I dunno if it tends to 'shift' dyno plots to the right.
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Old 08-01-2007, 02:14 PM   #3
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define laggy. When do you reach full boost? At what RPM do you have peak torque?
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Old 08-01-2007, 02:18 PM   #4
Master2192
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wtf is a 3082R? Did you mean 3076R with .82 A/R Exhaust?
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Old 08-01-2007, 02:54 PM   #5
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this ought to be a potent combo on the road especially on race gas. Any chance of some in car footage of this thing in action?
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Old 08-01-2007, 02:58 PM   #6
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waiting for chart...that does seem pretty laggy though for a built motor hopefully you can find the cause...

EDIT: I did notice that you had the .82 hotside though, which makes since.
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Old 08-01-2007, 03:04 PM   #7
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could even be the EBC the OP is using.. i don't think he commented as to what is controlling boost for his car.
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Old 08-01-2007, 03:04 PM   #8
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Quote:
Originally Posted by oneoverWRX View Post
what did you do to make it better? change exhaust housings?
It's a big ol' turbo on a 2 liter with honkin' cams. It's gonna be laggy.
You could:
go to a .63 hotside
go back to stock cams
swap in AVCS heads

All at a cost of peak HP though.

Those race gas numbers are sick, but I dunno how anyone affords C16 nowadays.
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Old 08-01-2007, 03:07 PM   #9
aps2fast4u
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Oh, I thought it was a 2.5L, that makes a lot more since.
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Old 08-01-2007, 03:11 PM   #10
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Quote:
Originally Posted by rjrutzky View Post
.... I dunno how anyone affords C16 nowadays.
you should ask that question to the boys on the Supra forums
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Old 08-01-2007, 03:19 PM   #11
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Quote:
Originally Posted by jigga View Post
you should ask that question to the boys on the Supra forums
Nah, I'm too busy asking them how they can spend 60k on 10-15 year old cars I'll stick with my junky subie on cheapo 110 gas.
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Old 08-01-2007, 03:20 PM   #12
dan avoN7
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Quote:
Originally Posted by Master2192 View Post
wtf is a 3082R? Did you mean 3076R with .82 A/R Exhaust?
a 3082R is a GT3040R.


I ran this turbo on a stock jdm 2.0 motor and had the same results as you. On 91 octane I was around 350whp at 21psi and on 104 octane at 28psi I made around 450whp (dynojet numbers). The turbo is meant for small displacement motors, not built 2.5's that can flow lots of air. Ditch the turbo and go with a 35R.
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Old 08-01-2007, 03:31 PM   #13
rjrutzky
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Quote:
Originally Posted by aps2fast4u View Post
Oh, I thought it was a 2.5L, that makes a lot more since.
axis stg5 is a 2.5L. I had my axis stages mixed up. I'll just go away now
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Old 08-01-2007, 05:46 PM   #14
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yes it is a 2.5

It is a 3082r which is basically the same thing as a 3065 or a 3040. I got a 3082r from perrin....they sent me the compressor and chra i put an .82a/r off or a 3076r? I was wondering if i could use a 82 ar exhaust housing from a 35r to help. Othewise i will just sell this setup and buy a 35r.
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Old 08-01-2007, 05:49 PM   #15
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Non-AVCS cams that big are definitely not going to help in the spool department.
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Old 08-01-2007, 06:15 PM   #16
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I would say either port and change cams or just swap in AVCS heads
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Old 08-01-2007, 06:45 PM   #17
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I have full boost from my gt3582r of my 2.5 crawford block and wrx heads with crower 272 cams and 3 inches intercooler piping etc.. at 3800-4000 rpms on 3th gear an above.. its a 10 second and coudl be driven in the street with no big deals with lag..

There must be something wrong there....

A gt30 on
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Old 08-02-2007, 08:21 AM   #18
dug-e-fresh
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Quote:
Originally Posted by Master2192 View Post
wtf is a 3082R? Did you mean 3076R with .82 A/R Exhaust?
Yea, I am sure thats what he means.

def
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Old 08-02-2007, 08:23 AM   #19
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Quote:
Originally Posted by remowgn View Post
Non-AVCS cams that big are definitely not going to help in the spool department.
He'll get 15 psi by 3800 or so. 20-22 psi (more than likely full pump gas boost) probably by 4200 or so.

def
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Old 08-02-2007, 11:12 AM   #20
Master2192
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Quote:
Originally Posted by dug-e-fresh
Yea, I am sure thats what he means.

def
nah I looked it up after someone mentioned 3040R. Its pretty much a hybrid turbo, 40R compressor with a 30R exhaust. Its not an official garrett designation which is what threw me off.
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Old 08-02-2007, 11:28 AM   #21
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who tuned it?
Got a graph?
the lack of port work would probably help with spool being you have the big cams on there because it helps to keep velocity up.
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Old 08-02-2007, 12:48 PM   #22
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I considered the 3040 at one time, but all i found were negatives on it. the turbo hits boost threashold late, then you combine that with your lack of avcs, stock ported heads, and larger cams.....you just shifted everything right.

IMO, i don't think there is a problem......the problem is the "whole package".

I'd bet if you bought a true 35r, while you still will have later boost than most (not much) you'd be better off.

what header are you running?




edit: well, you have increased CR....so that SHOULD help out. huh?
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Old 08-02-2007, 01:35 PM   #23
salt
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Quote:
Originally Posted by oneoverWRX View Post
Car was tuned at p and l by jorge. 93 pump and c16 maps
Mods

Axis stg 5 8.8:1cr
wrx heads w/ stg 1 axis package
kelford cams 278/272
No porting
Perrin 3082r kit
ultimate racing fmic
dual walbros
1000cc injectors
aem ems

Car made 349 on pump and 20-21 psi and 462 on c16 at 30 psi.
Peek torque is at about 5500 rpm.

Inside the dyno room the temp was 99.x deg.

I will try to post the graph a little later.

Has anyone else had any issues with this turbo being so laggy? what did you do to make it better? change exhaust housings?

Thanks
Did you remember to install the Valve seal on the tial wastegage ? it the silver ring in the far right? I know because I did this and my dyno looked like this:
http://forums.nasioc.com/forums/show....php?t=1233797



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Old 08-02-2007, 02:43 PM   #24
flycaster
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Quote:
Originally Posted by salt View Post
Did you remember to install the Valve seal on the tial wastegage ? it the silver ring in the far right? I know because I did this and my dyno looked like this:
http://forums.nasioc.com/forums/show....php?t=1233797
So you had a pre-turbo exhaust leak. It must have had some sort of squeal - could you just not hear it over the engine/exhaust noise?
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Old 08-02-2007, 02:45 PM   #25
oneoverWRX
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yes i am pretty sure that i did install that.

Would lean spool help? How lean can you go to make it spool faster?
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