Will a gsr crank and rods fit into an LS block, and if so, is their any benefit to it? Reason im asking is cuz i have a ls/vtec with 11.5:1 compression, But i just bought a turbokit and want to redo the bottem end. But i have a spare jdm gsr bottom end (cracked sleeve)with crank,eagle rods and arias 9:1 pistons. And was thinking of just stuffing all that into the LS. Thanx for any input. -pJ

 

ttt.

 

correct me if im wrong, the ls crank gives you the torque, if you put the gsr crank in then youll have less torque. i believe the rods and pistons should work.

 

it would work but id keep the ls stuff.

 

The gsr rods/pistons wil work with the LS crank? Why would you just keep the LS stuff, if the gsr stuff is all forged for turbo? So i shouldnt do it than..

 

Ive done it a couple times with a ls block and a b20 block (using gsr crank & rods)
Everyone has there own personal preferences between the ls and gsr cranks, I personally would chose the smaller of the 2 (gsr 87mm) for a turbo motor.

 

why would you pick the shorter stroke for turbo? I like longer stroke hondas for boost

 

just use the ls crank / rods / pistons. sell the gsr crank etc..

the best idea would be to use a gsr block (KS, girdle) and LS crank, spec rods, any b pistons.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">why would you pick the shorter stroke for turbo? I like longer stroke hondas for boost</TD></TR></TABLE>

Ive had better experinces with that crank. Ive built two gsr motors one 87mm stroke & one 89mm, both 84mm bore. the smaller stroke motor made power in the top end like a vtec motor is suppose to, the bigger(89mmstr) motor made alot of torque in the mid range, but wouldnt make power past 8000.
I like rpm, and were talking fi motors that are going to make a alot of torque no matter what crank you use.
i'll sarafice a little torque for more top end horse power.
But thats just how i like to build motors and im not going to say its the right or the wrong way to do it. figure it out for yourself like i did.

 

If you could not make power above 8000 rpm, there had to be something else wrong. An extra 1.8mm stroke could not cause that kind of problem.

 

you could me right, i dont know if its the different rod angles between the two or maybe the head needs bigger ports to accommodate more displacement. I'd like to build a long rod motor with an ls crank and see what the out come would be. Until then I'll just use the gsr crank.