ok i was talkin to my friend and he seems to think that if i put an LS crank in my Gs-R it will add torque and make it like LS/Vtec.. Is this true??

 

yes--- and its very commonly done

direct bolt in

 

you need more than just the crank, BTW. SEARCH is your best friend here. let's not have ANOTHER LS/VTEC debate here!! OMG

 

what else do i need if i may ask?

 

move the oil squirters.

Gsr rods wont work anylonger. However, ls rods fit perfect with b16 pistons...

ls crank
ls rods
b16 pistons
11.6 ish compression. Good streetability.

 

gsr rods can be machined to fit but imo would be pointless since this would somewhat destroke the motor

if you want you can get rid of the oil squirters but i would reccomend keeping them

and as mentioned if you are gonna go through the trouble (and are plannin on goin all motor) go ahead and put in new pistons too

 

Your looking at a complete rebuild, And if your doing that why would you downgrade to the LS crank, THe GSR crank is better balanced the LS crank will have Ungodly Vibration at 8500 RPM your motor wont last

 

when u replace the crank like that it is advisable that you rebalance it before the install. and anyways when u increase the stroke of a motor you will decrease the rev limit due to the increased stress placed on the bottom end at higher rpm's. as a rule of thumb, more stroke means less rpm's, less stroke means more rpm's. this is why gsr and type r motors have a higher rev limit than an ls motor. the ls crank is 89mm so you're increasing the stroke, which should in turn give you more usable torque across the powerband. and i too would keep the oil squirters, they cut down on heat and friction.

 

the rev limit has little to do with the balance of the crank, even though balancing is very important, and definitely advisable when yer talkin about a crank swap. in fact LS cranks are the preferred stock crank to go with when you wanna step up stroke/overall displacement. in the end it all depends on what suits your need, not to say that one crank is ultimately better than the other.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaxsimike &raquo;</TD></TR><TR><TD CLASS="quote">when u replace the crank like that it is advisable that you rebalance it before the install. and anyways when u increase the stroke of a motor you will decrease the rev limit due to the increased stress placed on the bottom end at higher rpm's. as a rule of thumb, more stroke means less rpm's, less stroke means more rpm's. this is why gsr and type r motors have a higher rev limit than an ls motor. the ls crank is 89mm so you're increasing the stroke, which should in turn give you more usable torque across the powerband. and i too would keep the oil squirters, they cut down on heat and friction.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaxsimike &raquo;</TD></TR><TR><TD CLASS="quote">the rev limit has little to do with the balance of the crank, even though balancing is very important, and definitely advisable when yer talkin about a crank swap. in fact LS cranks are the preferred stock crank to go with when you wanna step up stroke/overall displacement. in the end it all depends on what suits your need, not to say that one crank is ultimately better than the other.</TD></TR></TABLE>

i think what he's trying to say is stroke increase = higher piston speeds (exponential increase in normal loading of connecting rods and shear loading of crankshaft), which is why redline goes down as per Honda. raising the redline puts the crank and rods at higher loads, which increases the likelihood of failure.
using an LS crank vs. the GSR/ITR crank isn't a power producer in and of itself, but it does move the torque peak lower (this is because the piston speeds mentioned earlier have a lot to do with volumetric efficiency. when you stroke the motor, the peak VE moves to a lower RPM, which is why the torque peak moves lower, too). this feels good on the street since you don't have to rev as high to get some torque. that's really why people do it. not for power, but to move their torque peak down the powerband some. don't worry though; a nice GSR motor will do at least as well as a nice LS/VTEC.