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Forced Induction Superchargers | Turbochargers | Intercoolers

which bearings and head gaskets for a 370 with 16# boost?

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Old Dec 29, 2010 | 08:58 PM
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Originally Posted by Fb0dy0nly
Not if you are still on factory 346 short block.... [referring to ls9arp setup]

Seems like many are running coated...
How does the coating on the bearings help?
Is it to protect for longevity or for keeping temps down?
I couldn't see a coating making them "stronger" so I was curious.

The OP is running a 6.0. Coated bearings reduce wear in the event that the bearing is starved of oil for a very short period of time. It's a little extra insurance. A small blip in oil pressure during a wheel stand or something of that nature would be what it is helping protect you from.
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Old Dec 29, 2010 | 09:53 PM
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We used ls9's in a few cars this year.... ZERO issues with any of them and one was a 346 alum ls1 with 28psi.
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Old Dec 29, 2010 | 11:55 PM
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alum 347 28 psi!?!?!? id you JBWeld the gasket on???

i would like some details on how you managed that if you dont mind...
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Old Dec 30, 2010 | 11:23 AM
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Originally Posted by yelo04goat
alum 347 28 psi!?!?!? id you JBWeld the gasket on???

i would like some details on how you managed that if you dont mind...
Conservative timing and boost is really just a measure of resistance into the motor. Stock heads don't flow so great, lol.
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Old Dec 30, 2010 | 06:52 PM
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dont use a P series clevite in it. they are junk. if you use clevite get the H series bearings.
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Old Dec 30, 2010 | 08:32 PM
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It is my understanding that the P bearings are for stock cranks and H are for aftermarket cranks and are not made for stockers. I cant remember the reason though.
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Old Dec 30, 2010 | 08:37 PM
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Originally Posted by lt1camaroman93
Conservative timing and boost is really just a measure of resistance into the motor. Stock heads don't flow so great, lol.
just figured that would be enough to lift the head a fair amout..

thats good ****
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Old Dec 30, 2010 | 09:17 PM
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Originally Posted by Fb0dy0nly
Not if you are still on factory 346 short block.... [referring to ls9arp setup]
Yes it is
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Old Dec 30, 2010 | 09:21 PM
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Originally Posted by ChevyChad
It is my understanding that the P bearings are for stock cranks and H are for aftermarket cranks and are not made for stockers. I cant remember the reason though.
you can use both "P" and "H" bearings on a stock crank but you can only use "H" bearings on an aftermarket crank.
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Old Dec 30, 2010 | 09:57 PM
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Originally Posted by yelo04goat
just figured that would be enough to lift the head a fair amout..

thats good ****
Trust me, I was VERY shocked that it never lifted a head.
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Old Dec 30, 2010 | 10:07 PM
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Originally Posted by lt1camaroman93
Trust me, I was VERY shocked that it never lifted a head.
could you PM me some details on the setup like heads cam turbo stuff like that... this is interesting also stuff like how it lasted and driven or just race car....?
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Old Dec 30, 2010 | 10:12 PM
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Originally Posted by yelo04goat
could you PM me some details on the setup like heads cam turbo stuff like that... this is interesting also stuff like how it lasted and driven or just race car....?
Driven around town and to the gym. No long trips.
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Old Dec 31, 2010 | 01:42 AM
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Originally Posted by Fb0dy0nly
Not if you are still on factory 346 short block.... [referring to ls9arp setup]
Why do you say that?
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Old Dec 31, 2010 | 02:04 AM
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I use OEM GM aluminum bearings. They have always held up really well for me but are way over priced.
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Old Jan 1, 2011 | 06:59 PM
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Originally Posted by dudeman
dont use a P series clevite in it. they are junk. if you use clevite get the H series bearings.
How you get the idea they're junk? How many engines have you built run 8s on stock crank and P bearings, tore it down after 100 passes on kill, inspected the bearings, built it again with P bearings, back in the 8s for another 2 seasons?

H bearings are for crankshaft with radius fillet, stock crank does not have radius.

some more info in this thread
https://ls1tech.com/forums/generatio...ease-help.html
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