GSR vs LS

[crv-tec]

In going with a motor, would has the most potential for overall power (torgue and horse), and has a good availability of parts to add on later? I know the LS is non VTEC, but with a VTEC conversion, which motor would be better?

[CivicSpoon]

With a vtec conversion on the LS, the GS-R would still be better IMO. With the LS; unless you have a good amount of motor work, you're not going to be able to rev it nearly as high as the GS-R. And that's where vtec makes the most of it's power, in high rpms. But then again, I've heard of people making quite a bit more power out of LS/vtec's over GS-R's. And both motors have just as many aftermarket parts available.

[crv-tec]

What is the difference between the two? They are both 1.8's, is just just internals that are different? This has been one of the things I could never figure out, why is the GS-R so desirable for most people?

[mrceej]

GSR rotating assembly is designed with high RPM in mind. The LS internals are not balanced like B16A/B and B18C internals which is why it doesn't stand high RPM abuse as well. I believe there is another difference in the block itself. Someone can correct me if I'm wrong but I believe the B18C blocks have oil squirters for the pistons. To put it simply, LS/VTEC can be an awesome combo. But to maximize it's full potential, you need to choose ALL the right parts. It may be more simple to just go full GSR engine.

[civickiller]

yes the gsr has oil squirters and a girdle. you dont need the oil squirters if you have aftermarket pistons.

the ls has a longer stroke about 2mm longer, both have the same bore so thats why the ls is over 1800cc and hte gsr is under 1800cc.

[GScivic7]

rod stroke ratio on the LS block isn't high RPM friendly.

[Kven]

Originally Posted by GScivic7

rod stroke ratio on the LS block isn't high RPM friendly.

in theory, neither is the b18c's, but with enforced parts and balance, you can make it rev high.

imo, the ls/vtecs are a budget option because you can start with a b16/17 or with the ls block then later, when you have more money you can mix them.
if you have the money just go with the GSR, and if you want that little extra displacement just swap in a LS or B20 crank with aftermarket conrods.

[Medabots]

I'm trying to build a LS/Vtec and I want to know what would be the best set up...? I'm thinking about GSR head, ITR headers and a cuple more things to the head (camshaft, adjustables cam gears and for the block I will change the pulleys) I think thats good, but I know you guys could help me do better for less $$$.... what do u think...

[mrceej]

B16A head has better flow characteristics than a GSR head. Or was it the intake manifold?

[civickiller]

dont change out yoru crank pulley

[Medabots]

I know the GSR has a "dual stage intake". any ways, do you think I should put a B16 head and get some B16 pistons? or shuold I leave the block wiht stock ones?

[mrceej]

If it were me, I'd change the entire rotating assembly to one that is designed to handle high RPMs.

[Medabots]

Like what?...

[Kven]

Originally Posted by mrceej

B16A head has better flow characteristics than a GSR head. Or was it the intake manifold?

thats a myth(flow); http://www.importreview.com/reviews/...sB16Ahead.html
but i think the b16a manifold does flow better because lack of secondaries in the way.

if you can get them at a good price, then yes get the b16a pistons and head. the b16a pistons will be around 11.5:1 CR(a little higher with GSR head).

The GSR/Type-r and B16A cranks had revs in mind so that wouldnt matter. The Formula 4AGE(Toyota Racing motor) has a r/s thats about the same as the GSR/Type-R(1.58:1) and revs to 11,000rpm.

[Medabots]

but I also want to go turbo, isnt bad running a high compression?.....