boosted hybrid

I switched out my .63a/r housing for a .82a/r housing this afternoon. I remember there were some people asking questions about how much bigger the .82a/r was compared to the .63a/r housing. Here are a few pics that I snapped:









The .82a/r housing will free up energy for the turbo, allowing you to make more power at the same psi level. The .82a/r will approximately shift your spool up time by 1000rpm higher than the .63a/r. My redline on my engine is going to be at 9,000rpm so the .82a/r is the perfect housing. Also, the larger housing allows you put more power to the wheels on street tires due to the extra lag.




[Modified by boosted hybrid, 10:57 PM 4/4/2003]

hybrid901

Nice pics. Are the housing for a stage 3 or 5 wheel? Is the exhaust inlet the same size on both housings. I was looking at my inline pro mani and sc61 today and the opening on the manifold is about 3/8" wider than the opening on the turbo. I'm thinking about using a die grinder and opening the turbo exhaust inlet up some to match the manifold. I'll try and get some pics at work tomorrow.

boosted hybrid

As far as I know the housing size is independent of the exhaust wheel trim. So the housings can be used on stage 1, 2, 3 or 5 exhaust wheel blades.

hybrid901

The opening on my old stage 3 exhaust housing is noticably smaller than on my new stage 5. Any input about my turbo and manifold question?

boosted hybrid

I would open up the turbo inlet to your manifold then. You are going to choke up flow if you dont open up the inlet on the turbo.

On second thought of your question about the exhaust wheel and housing size, you are right since the wheel size is going to be larger on the stage 5 wheel. I havent personally seen the housings so i cannot comment.

hybrid901

Can you take the exhaust housing off and just put different one on. It doesn't effect balance or anything does it? What about extrude honing the exhaust housing?

GOLDBERG

how much more will it increase HP ??? and how long does it take to spool on a b16 or b18???

boosted hybrid

You can swap out housings all day long, it doesnt have any effect on the balance of the turbo at all. The shaft with the compressor and exhaust wheel are pre-balanced, they are fixed at either end so they cannot unbalance. The housings are independent of the blades, shaft and center section. The only time that you would have to worry about not being able to swap out housings is if you put a smaller housing on a larger compressor wheel. You'll run into problems with fitment, and the internal of the housing has to be ported to make the larger wheel fit. This is exactly what they do with the 60-1 hifi turbo, stuffing the larger wheel into the smaller t04e housing.

Extrude hone is just a fancy porting job. Your going to gain a larger area to push the air through, but you'll create more lag. Depending on how much you extrude hone the housing, it will be like creating a .85, .87, .89 a/r on the exhaust housing. Also, by creating a larger volume area, its harder to keep track of the turbo efficiency on a compressor map.

I remember seeing a dyno from turbocharged-SER awhile ago on 7lbs they were making 320whp on a midly built gsr with the exact same turbo that I am running: t3/t4oe 60 trim, stage 3 blade .82a/r housing. He claims that nissan guys pick up 80-90 hp from making the switch to the larger housing on their engines. I am not convinced of the drastic hp increase, but I do believe that it will increase power to some extent. Expect full boost on a b16a somewhere around 6,000rpm, and full boost on a gsr around 5,000rpm.

GOLDBERG

for how much boost??? this is with a .82 ar exhaust housing right??

boosted hybrid

Around 8psi. Its all just a guess. There are to many variables to be able to make an accurate statement. That's with a .82a/r housing.