convert a 35 to a 40?

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Mar 29, 2007 | 12:10 AM

#16

brockdieseldude

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Joined: May 2006

Posts: 113

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From: Logan, utah

Quote:

Originally Posted by vssman

I've done a few without having balanced them and all are holding up fine. Mine has been run hard almost everyday for about 4 years (44 psi). I was told by HTT that you really don't have to balance it. I've heard of HX40s letting go but not really many hybrids.

just my $0.02

Thats good but I wouldn't risk it. I have seen many hybrids blow but not form to much boost, but from letting out too quik and barking the turbo and breaking the shaft. But something spinning that fast NEEDS to be in balance no questions asked, but what do I know right????

Mar 29, 2007 | 03:57 AM

#17

NMCTD

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Joined: Mar 2006

Posts: 373

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From: Albuquerque, NM

Quote:

Originally Posted by LanceD

so if I run a 15.6 in the 1/4 mile, what would my time improve to with a 40 compressor wheel?

also, about how much HP will it give?

also are all the rebuild kits the same quality? or should I get a specific one? what about the compressor wheels?

I can't say with any certinty what improvments you'll see other than cooler egt's. As for the parts I would only get holset fatory parts. HTT is good people to deal with, have good prices, and are holset distibutors, thats where I would get the parts from.

Mar 30, 2007 | 03:08 AM

#18

LanceD

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Joined: Oct 2003

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From: Albuquerque, NM

How much boost can I expect from this? also am I risking my head gasket? im pushing about 42 psi right now.
thinking about adding meth injection also.

Mar 30, 2007 | 09:46 AM

#19

BigBlue

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Joined: Feb 2002

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Your risking your headgasket and turbo at 42psi. That's why your turbo destroyed itself. Factory turbo's aren't good over 35ish. Not to mention that your drive pressures at 42psi on the factory turbo are probably pretty dang high and that can pop a headgasket as well. I'd expect you to see about 40psi out of the 40 and that shouldn't be to bad on your headgasket. If you start spraying meth though you run the risk of popping the headgasket without at least studs in there.