Randy WS6

iTrader: (69)

Im thinking of getting a new bare L92 block and putting in my 4.100" crank and 6.125" rods and boreing it to 4.080" if safe!!! and make me a 429cid. Right now i have a LS2 418cid 4.100" crank and 6.125" rods & 4.30" bore. What is thw max bore on these blocks.

Rock_Daddy

iTrader: (8)

4.8 would be sweet but I bet you meant 4.08
Someone here as went 4.1 with before and after sonic testing of course. If I had to guess, each block is a little diffrent and would need to be tested but 4.08 definitly seems possible.

Steve Bryant

iTrader: (1)

I really believe that the gains from 11 additional cubic inches would not be worth the effort and expense. Do you have any other particular reason to want to go to 429 CID other than it sounds cool?

Steve

Randy WS6

iTrader: (69)

well i have my LS2 maxed out on bore 4.030",And as far as a expense i just need block and pistons. around 2000.00

Juiced

iTrader: (2)

Good luck with that one......

Beast96Z

iTrader: (21)

Your buddy Shirl is going 4.100"x4.100" after sonic testing. I wouldn't do it, but whatever. Personally it wouldn't be worth the $2g's if you could get it done for that. Even if you made it to 1.5 hp per cubic inch, you'd only be getting 16 hp.

JakeFusion

iTrader: (7)

TSP machines the block to 4.080" as part of their 418cid package with a 4" stroke.

stevewix

most lsx engines run 1.5 hp/ci with a big cam. that's not too tough. i say do it, as long as NO power adders are involved that is.

Beast96Z

iTrader: (21)

He could bump up 25hp on his jets and achieve more for $5.

grifter757

iTrader: (11)

Whats the best place to pick up a L92 block?

Ryne @ CMS

iTrader: (10)

my block is bored 4.080 in my l92, no problems here, but i wouldnt go any more then that