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Ls with p72's

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Old 12-12-2010, 09:08 PM
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Default Ls with p72's

whats up ht?
Ive been rebuilding my B18B1 everything is coming together good, I am in high school and have low budgets.
My Ls crank spun main bearings and rod bearings under boost on the highway a couple of months ago.
Like i said I have low budgets, I managed to get a gsr-B18C1 Crank and p72 rods and pistons with it..

I plastic gauged the crank and rods today oil clearences are good,

1.My Question is how dumb am i for de-stroking my ls and loosing displacement No one does it?
2.What do you think my static C/R is?
3.should i raising my Rev Limitor for the gsr bottom end?
Old 12-13-2010, 06:17 AM
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Default Re: Ls with p72's

the problem with the ls motor is the head. untouched they dont like to rev very high
Old 12-13-2010, 07:48 AM
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Default Re: Ls with p72's

Originally Posted by negusjuda
the problem with the ls motor is the head. untouched they dont like to rev very high
Right, Mine has been P&P with factory cam gears cams springs retainers valves all stock except a port and polish
I have heard so many pr-4 heads tick and knock from being overreved.
Lets says i have my valves adjusted perfect, How manny Rpm's can my p&p head and valve train handle, Cause with the gsr crank my power is going to be in a hinger rpm.
Old 12-13-2010, 02:12 PM
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Default Re: Ls with p72's

stock valvetrain = stock redline.
Old 12-15-2010, 10:46 AM
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Default Re: Ls with p72's

Originally Posted by 00Red_SiR
stock valvetrain = stock redline.
Yea, I figured.
I wonder if anyone takes them higher without problems,sadly to say I doubt it
Old 12-15-2010, 12:29 PM
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Default Re: Ls with p72's

Originally Posted by B18B1-Crx
Yea, I figured.
I wonder if anyone takes them higher without problems,sadly to say I doubt it
That's a bargain you would unfortunately lose
Old 12-15-2010, 12:32 PM
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Default Re: Ls with p72's

When I was 16 I usto revv my da LS to 9k on a cheap chipped ecu.
She lasted 6 months of weekly beatings.

Gotta love being young and dumb
Old 12-15-2010, 01:35 PM
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Default Re: Ls with p72's

Originally Posted by B18B1-Crx
Cause with the gsr crank my power is going to be in a hinger rpm.
Your cams have a large impact on how high up your engine will make power.
Old 12-16-2010, 07:50 AM
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Default Re: Ls with p72's

Maybe you answered this but why not LS slugs again?
you getting off the boost?
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