408 or 402
#2
TECH Senior Member
The 408 would have super clean bores, nicely hatched to accept and seat the fresh rings.
The 402 is probably used and needs honing which would make it bigger than 402 after all is done.
The 402 is probably used and needs honing which would make it bigger than 402 after all is done.
#5
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Used? I'm going to bore my lq4 to a 402 or 408. I'm assuming that I can make ether or.
There is no advantage, but if you stick with the right bore you can get cheaper off the shelf pistons as opposed to custom ones.
There are many 4.000, 4.005 and 4.003 pistons readily available, so a 402, 403 and 408 are easily made. Tho I would at least do a light hone of the bore to a 4.006 just to clean it up.
#6
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My LQ9 block was clean enough that all it needed was a hone to 4.005", which provided me with a 402 inch motor with the stroker crank. I saw no reason to bore it to 4.030 when a simple hone would suffice. This left room for next time, though obviously I hope there doesn't need to be a next time! It also saved me a few bucks at the machine shop.
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#17
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My LQ9 block was clean enough that all it needed was a hone to 4.005", which provided me with a 402 inch motor with the stroker crank. I saw no reason to bore it to 4.030 when a simple hone would suffice. This left room for next time, though obviously I hope there doesn't need to be a next time! It also saved me a few bucks at the machine shop.
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My LQ9 block was clean enough that all it needed was a hone to 4.005", which provided me with a 402 inch motor with the stroker crank. I saw no reason to bore it to 4.030 when a simple hone would suffice. This left room for next time, though obviously I hope there doesn't need to be a next time! It also saved me a few bucks at the machine shop.
By the way "combs_425", everyone did a great job setting you straight on a 402/408 stroker 6.0. For the most part, most build a 402 out of the aluminum block LS2 (4.020" max recommended bore) and a 408 out of the iron block Lq4/LQ9's.