to4b hybrid on all stock components?

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May 17, 2006 | 07:17 PM

#26

Mx6-Rx7 Addict

Brap Brap Brap

Joined: Oct 2002

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From: Corpus Christi, TX

Quote:

Originally Posted by sleepydave

8 psi (think cfm) on your stock turbo DOES NOT equal 8 psi (remember, think cfm) on a larger turbo

i dont see anything wrong at all with him wanting a hybrid turbo for a slightly better kick. But if rotoraries apex seals are ANYTHING like piston rings, psi does not kill them, actual cylider pressure and hotspots kill them. you are less likely to have said hotspots at 6-8psi on your bnr vs. 6-8psi churning through a hot little stock turbo and will make marginally more power with the bnr.

I really don't think that he will have to worry about blowing any seals at 6-8 Psi on a stock (or slightly larger) turbo.

Those hot spots IMO would be caused more to the lack of proper tuning.

Also he is still on the stock piping and intercooler, so i'm pretty sure that there will be higher temps with a larger turbo pumping the same pressure into the stock piping versus a stock turbo doing the same.

May 17, 2006 | 09:30 PM

#27

gxl90rx7

destroy, rebuild, repeat

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From: Charleston, SC

Quote:

Originally Posted by hondahater

well the exhaust, intake and other constrictive things cause the lower boost of the stock turbo so i'm sure it would do it to a hybrid however you gotta remember that the amount of boost on a stock turbo is differant the the same amount of boost on a hybrid because of the larger compressor.

what is the difference between 8 psi on the stock turbo and 8 psi on a bigger turbo? I dont see how one turbo can make more power at the same boost level, except for maybe lower air temperatures out of the bigger turbo? is that the only difference (besides slower spool-up time)?

May 17, 2006 | 09:53 PM

#28

bacek

Senior Member

Joined: Jul 2004

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From: los angeles

you can always just "pass" smog

May 17, 2006 | 10:28 PM

#29

fstrnyou

Rotary Enthusiast

Joined: Sep 2002

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From: Statesboro, GA

Quote:

Originally Posted by breckboarder55

an electronic cut out, keep the cats, and stock ex.... so you get the performance/ sound you want when you want and will still pass emissions...

May 17, 2006 | 11:01 PM

#30

fstrnyou

Rotary Enthusiast

Joined: Sep 2002

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From: Statesboro, GA

Quote:

Originally Posted by sleepydave

8 psi (think cfm) on your stock turbo DOES NOT equal 8 psi (remember, think cfm) on a larger turbo

You are right in that 8psi on a small turbo is not the same as 8psi on a larger turbo. BUT, cfms has nothing to do with it. Boost is simply put as backpressure in the intake manifold. If you try to put more "cfms" through the same size hole, the psi will rise. There's no way around it. Basically if you're making more power at the same boost, it's because your IAT's are lower. And as everyone knows, cooler/denser air makes more power. And you would have to compare the two compressor maps to really know if 8psi on that hybrid would be better than 8psi on the stock turbo. The hybrid might not be any better than stock until after 10psi or maybe it's better at anything above 2psi. you just don't know without comparing compressor maps.