Fairmont 2.0 (forged lq4, s480, 800whp, under new management)

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06-12-2012, 05:40 PM

#361

stock48

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Your engine might have a tighter ring gap, or you got a bad batch of fuel. I've seen end gaps on factory engines from .014-.024". Was it the side with the lower cr head or original head that blew?

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06-12-2012, 08:10 PM

#362

denmah

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the stock truck head, 60cc the corvette head on the other side is 67

i got her going already and drove it around the block about an hour ago

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06-12-2012, 08:27 PM

#363

a4ls2goat

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Nice.
You work Fukin fast!

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06-12-2012, 08:50 PM

#364

SSZ

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Haha. That was fast. Gotta wonder how the crank feels with different compression ratios from bank to bank. Do you tune different from one side to the other?

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06-13-2012, 05:56 AM

#365

denmah

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its very similar compression numbers even with the different heads, the corvette side is averaging 135 and the truck side averages 145

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06-14-2012, 04:48 PM

#366

slow67

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Quote:

Originally Posted by denmah

what i think is funny is we have 16deg in my friends truck, tr6 plug, ~19lbs

same thing 4.8 zr1 cam, gt45 turbo, truck is 4700lbs and goes 10.87 @ 126.xx

that has way more passes than my car and has yet to hurt a piston.

i mean i obviously found the limit lol

Don't forget that the truck has lower compression than your driver's side bank (9.1:1 vs 9.5:1)

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06-14-2012, 05:21 PM

#367

denmah

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The truck side is roughly 10-15 psi more than the 241 ported ls1 side

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06-15-2012, 07:29 AM

#368

denmah

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headed to maple grove tonight to try and score a 9 sec pass on this old betsy 4.8

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06-15-2012, 08:04 AM

#369

a4ls2goat

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Quote:

Originally Posted by a4ls2goat

Nice.
You work Fukin fast!

Quote:

Originally Posted by denmah

headed to maple grove tonight to try and score a 9 sec pass on this old betsy 4.8

Excited for the results!
Best of luck man!

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06-15-2012, 08:11 AM

#370

denmah

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so i am at 12deg timing now, i have the BR7EF plugs in and im trying 18lbs of boost and spraying the 125 the whole way this time, because ide rather go high 9 than a low 10 haha

if she stays together it should be getting a cage this month and ill try race gas mix and 22lbs again some day

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06-15-2012, 08:49 AM

#371

a4ls2goat

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why dont you throw in a couple of gallons of race gas just for added safety

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06-15-2012, 09:42 AM

#372

denmah

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ide rather know its safe on pump i have a few pistons left.

ive stepped back considerably from where it was.

if it survives this pass no problems ill splash some race and go back to 15deg 22lbs and nitrous on top of that lol

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