What exhaust housing to go with for 60-1 trim???

[mccarlin]

Hey guys,

I have a 93GSX, Stock motor, with a AEM, 60-1 trim, full fuel system, stock cams, SS header, ect...

I had a .63 AR housing on it and it was LAGGY to say the least. Full boost close to the 5K range. I have a .48 AR housing in my hands and was going to throw it on and get better spool out of it and better driveability. In the next couple months i will be getting cams and an intake manifold, so i know the top end will be breathing better then.

Should i stay with the .63AR or put in the .48???
What are most people running with the 60-1 trim??

Thanks

 

[rdrkt]

If you aren’t getting full boost till 5k with a .63 then something is wrong with your setup. I would get more than 20lbs on my factory motor with the .82ar turbine housing a bit before 5k. But a .48 housing is still bigger than a 8cm housing so its not like you are chocking it off THAT bad with the smaller housing. All depends on the results you are after.

 

[Ben K]

If you are getting full boost that high in the RPM range, something else is wrong.

I'd stick to the .63, and check the car over for any boost leaks in the intake track, as well as any exhaust leaks before the turbine inlet.

 

[mccarlin]

Actually last time i checked i got full boost at 4400 or so, but it still felt laggy till full boost hit then it was a TRAIN. just wondering with the future mods i mentioned what the better option would be. I dont want to blow the motor either, since i know im already pushing those limits.

 

[mccarlin]

Originally posted by Ben K
If you are getting full boost that high in the RPM range, something else is wrong.

I'd stick to the .63, and check the car over for any boost leaks in the intake track, as well as any exhaust leaks before the turbine inlet.

So you'd stick with the .63?? what woud i be missing if i went with the .48?

 

[Boosted98gsx]

Originally posted by mccarlin
So you'd stick with the .63?? what woud i be missing if i went with the .48?

A little top end,

 

[NOSLO2PT0]

Originally posted by rdrkt
But a .48 housing is still bigger than a 8cm housing so its not like you are chocking it off THAT bad with the smaller housing.

From what I understood, the 7cm Mitsu housing was VERY close in size to a .48 a/r. Believe Scott at FP said the 7cm housing was around .49 a/r in relative size.

The other thing to consider is your turbine wheel size. If you are running a Stg. V wheel, then yes, you are gonna get hella lag. When switching turbine housings, make sure the new (smaller) housing is made for teh same size turbine wheel as what is currently being used. You can't mix and match housings without knowing the correct turbine wheel size.

 

[rdrkt]

Originally posted by NOSLO2PT0
From what I understood, the 7cm Mitsu housing was VERY close in size to a .48 a/r. Believe Scott at FP said the 7cm housing was around .49 a/r in relative size.

Yeah right after I posted I realized that 8cm is somewhere in the low .5 range I think.

 

[gritsak]

the 60-1 .63a/r got full boost on my completely stock motor around 4000-4300ish rpms...now ive got a 2.3l and wish i would have went with a .82 stage V housing but i guess i can always swap it out. i cant wait to see how the stage III .63 spools up with the stroked/built motor(whenever it gets finished)..should be pretty nice for the street