my friend is putting in his b16 rods and pistons in his ls block because his ls rods arent in good condition.. im just wondering what the compression would be since the b16 rods are alittle shorter.. its gonna have a oem 3 layer head gasket.. were hoping for like 10.8.1 or something nothing 11 and up.. what do you guys think??? thanks alot and he wants to turbo it.. but were just wonderin on the cp thats its gonna have.. need quick answers thanks guys

 

bump

 

I would tell your friend not to even try that piston and rod combo because in an ls block, B16 rods will run a piston to deck height that is way out of spec. The combo does not work because the pistons will not reach out of the cylinders nearly enough. This combo would have the pistons sitting so low in the cylinders that it would yield extremely low compression, if any. You need to use an ls crank and a set of ls rods with the B16 pistons installed on them. That way the piston to deck height will remain within proper specs (.030). I also suggest a set of ARP rod bolts to help tighten up the ls rods and prevent bolt stretch. If this will be an ls/vtec engine with a B16 or ITR head you will end up with 11.3 comp and with a GSR head you'll have 11.6 comp. If you are still using an ls non-vtec head, you'll end up with 10.8 comp. Hope this helps you out, good luck.

 

If your using the b16 pistons the comp. ratio would be about 8.8 to one.If you use the ts it would be around 7.7.
Glenn

 

yeah thatd be great if you were running about 25lbs of boost lol

 

hes gonna run the ls crank with that so it shouldnt that off.. dont you guys think

 

he got two of the rods and pistons in....but when it is at bdc it feels like it gets stuck....you think that the bottom of the pistons might be hittin the block?

 

Well now you know that doesn't work.It would have been pretty gutless anyway.
Glenn

 

nah it works when he tighten up the rods bolts they fell into place and it works normal....

 

the pistons hit the crank!!.....he's gettin ls rods tonite