thanks

 

(89-87.2)/2=+.9mm

137-137.7= -.7mm

.9mm-.7mm=.2mm

using the same piston the ls crank rod setup will sit .2mm higher than the gsr setup. .2mm = .008 inch. A normal gsr setup has a piston to deck of .030". so you would now have .022" deck height which is about the same as a b16a motor.

In other words everything will be fine, good setup just remember to cap off the oil squirters as the cranbk itself will hit the squirter.

 

wuts the point if u gotta cap the oil squirters

 

no external oil lines. The oil squirters can be used but they would need to be machined so that they sit lower somehow. If forged pistons are used the oil squirters are useless anyways since the forged pistons are very good at dissipating heat. Most builders block them off on race motors to raise oil pressure a bit for the rest of the motor. For a street motor it would definitely be nice to keep them but it isn't that vital IMO.

If you want to keep them install the crank and then the squirters and see what part it hits and then you might be able to mill it away a bit until everything clears. I think the bolt will be the only part that hits so if you mill it a bit and are really careful installing it you might be able to get it to work out. I'd still cap it though.

 

you absolutely cannot run an ls crank in a gsr w/o custom pistons 2mm is huge. thats 80 thousandths and that will put the piston above the deck. you need to order a custom set of pistons with a raised pin height to bring it back down in the hole. we usually stock these for this setup but dont have any on hand right now. if you decide you want the custom pistons let me know.

by the way you made a mistake in your math. its 2mm not .2mm. thats 80 thousandths.

 

The ls crank is 89mm, the gsr is 87.2mm, difference is 1.8mm of which .9mm is added up top. Think of it as .9mm is added to the radius of the crank.

The ls rod is 137mm, the gsr rod is 137.7, difference is the ls rod is .7mm shorter.

.9mm-.7mm is .2mm or .008inches, not very much. Show me where my math is wrong.

 

i was referring to building it with a GSR rod length. I still wouldnt build it the way you are doing it. the right thing to do is get a custom piston with the pin moved up. everybody has their own way though i guess.

 

pretty much kj is a great help on this one and by the way when it comes to building hondas i prefer to build with all oe internal parts the only exeption being maybe je pistons but not likely

 

my advice, sell what you have and go with a type R block!

OEM Reliability and only slightly less horsepower.