crxfreak1117

so some how my center cartridge of my turbo broke so i sent it to blaastperformance and they are rebuilding it for me. (the turbo it a full race garrett t3/t67)

well right now im running a .82 exhaust housing and was wanting a .63 which he has in stock he said he also has a turbonetics .48 a/r housing that he could put on there so i will spool alot quicker.

here is my question will a .48 exhaust make my car drop off in power in higher rpms?
my motor is a fully built b16 and previously making 448.9hp on the .82 exhaust and hit full boost around 6200rpms so i want something that will help me out on that

Brad Campbell

What if any are your power goals? IMHO it's not worth having that turbo in anything under a .82 a/r turbine housing.

crxfreak1117

i would like to see the 500 mark but i want to stay in boost for longer than 3 seconds 6200rpms-8200rpms and when i shift gears it falls out of boost a pretty good bit

Brad Campbell

If you are only looking for 500, and don't like your current powerband, then I would venture to say that isn't the turbo for you.

crxfreak1117

how you figure? thats why im switching exhaust housings so i will spool quicker just asked about the .48 housing to see if it would make my power drop off a good bit in higher rpms?

Brad Campbell

Sorry... the answer to your question in my experience is yes. The smaller housing will start to choke in high flow.

crxfreak1117

can anyone second this?

Mikey3000

yeah its a fact of turbochargers. smaller turbine = quick spool, no top end. .48 is way too small. if i were you i'd stay with .82

twkdCD595

I agree with them, anything smaller than an .82 is really choking that 67mm unit... the backpressure with a .48 housing on that unit would be HUGE.

As opposed to choke off this unit to try to get it to spool better, it seems like a better idea maybe to rebuild it sell it and step down to a smaller unit that will support 500whp/ spool faster.

ahobbs

that's exactly why i did what i did.

My fell out of boost so bad between shifts even with a .63 A/R

You need another turbo. people will buy it. put it up for sale.

crxfreak1117

idk which to do now everyone on here is sayin dont to it but the guy thats rebuilding the turbo says i should and also my tuner says it will be alright to since it has the stage 5 wheel

HybridcivicLS-T: what was you hitting full boost at? and was it on a b16?

92cxturbo

you need to rev out the motor longer IMO, maybe some bigger cams... I had a sleeved b16 with the same turbo as you and I spun it up to about 9K to 9.5k. What are you goal's for this car?

crxfreak1117

mine is also a sleeved b16 and i would like to hit 500hp (for now) but would like to hit boost alittle sooner than 6k thats why im askin about the .48 and .63 exhaust housings

AFI Turbo

You do no want to put a .48ar turbine housing on it. If the guy is suggesting that i would question his ability to rebuild it also.

Get a gt30r for 500whp.

ahobbs

I have a B18c, I hit full boost around 6500ish not really sure

there is your answer

92cxturbo

I was thinkin the same.....

To the OP, do you have a goal as far as track times or do you just wanna say "I have 500hp." The turbo you have now could power you into the high 10's. Get the gt35r if you got the cash and you want better spool, plus you could get 600 out of it if you want to make more later. I never really liked smaller turbos in fwd. Every car I raced with a small turbo would jump out ahead for about 5 sec then I was flyin by them like they hit the brakes.

crxfreak1117

well im not one of those that just want it for the number so i can say yeah i have 500hp i just want alittle more and as far as track times i dont go to the track to to much but might this season
i dont want to get another turbo i would like to keep the one thats on there now and was hoping i could just switch the housings so i could spool alittle sooner thats all

TheShodan

iTrader: (14)

Hell, even a Silver surfer could do that a bit better. with no need for the water lines in a 4 bolt that would mate up to the current T67. You couldn't put a .48A/R turbine housing on there anyway. Turbine wheel is too big to fit, and you'd be maching all day to try and get that large wheel to fit inside a .48A/R Volute.

I too would question his ability to rebuild if he suggested that.

TheShodan

iTrader: (14)

Fully bored or not, you're putting a 65lb/min setup on a 1.6 litre, you're not going to do anything to have that pressure reach much sooner, no matter what turbine housing. The wheel is larger than the standard smaller T series, and you're exhaust energy will reach maximum pressure by about 6000, bottom line. If you want it to reach pressure faster, change the turbo, but be prepared to lose some top end.