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post #1 of 3 (permalink) Old 03-31-2001, 03:24 PM
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If the l99 is externally identical to the lt1, whats the difference on the inside? just the displacement? couldnt you just bore out the cylinder walls to make it 5.7, or is the block different?

just wondering....

96 Medium Garnet Red Caprice.
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post #2 of 3 (permalink) Old 03-31-2001, 04:27 PM
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no. You cant bore it out to a 350. Maybe a .030 over is safe, but pretty much any engine that is bored over that, will be unsafe.

I believe that the internal displacement dimensions for your car is:
Bore: 3.47"
Stroke: 3.48"

My 305 has:
Bore: 3.75"
Stroke 3.48"

The 350 has:
Bore: 4"
Stroke: 3.48"

I'm not completely sure on this, but the math is pretty close. ANyways, you can see that you'd have to bore your block .250 over to get a 350 or so. You can put a stroker crank, something like 3.75" will give you a 284 without boring over. That's 4.65 liters man.

I believe I could make my engine a 327 by boring and stroking it. Not sure on the exact dimensions tho.
post #3 of 3 (permalink) Old 04-02-2001, 04:11 PM
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I believe Power House sells a stroker kit for the 305 ends up as a 335. This being much less common than a 383 buildup makes it cost a little more. For the difference you could probably get a 350 core. As far as stroking the L99 it would likely require custom pistons and some other unforseens driving the price up quickly. I have the L99 and would like to put in a new LT1 with a mild cam. I think this is a better bet than stroking a L99 but not as good as a 383. I'll stop rambling now.

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