Ls+gsr internals

[monchiy2k]

Anybody know if this combination works fine?
Im loking this to use with my greddy turbo at 20 psi.

[JDM Jon]

the ls block doesn't have the oil squirts that the gsr block does
but i believe it will work though

[rudsone]

cast pistons (stock oem pistons) wont hold for 20psi they will melt.

you will need forged ones.

[monchiy2k]

Im have a JE pistrons 9.0:1, and eagle rods, type r crank, ls block w blockguard, cometic head gasket, arp head bolts, gsr head....that's my set up.
What i want to know is how the gsr internals work in ls block, the compresion would go up or down?
Any comment or advice?

[Dead Bird]

are you saying your eagle rods are GSR spec??
And you want to know if that will work?

Yes, it will work.

GSR/type R crank is shorter traveling than LS, so that will lower your Compression.
GSR/type R rods however are longer than LS, raising your compression.

Putting the differences into a compression equation, you will end up with a little bit lower than stock compression, even less with your lower comp pistons.

[young_ar]

yes gsr internals fit in ls aslong as u use gsr everything (crank rods/pistons)

[monchiy2k]

are you saying your eagle rods are GSR spec??
And you want to know if that will work?

Yes, it will work.

GSR/type R crank is shorter traveling than LS, so that will lower your Compression.
GSR/type R rods however are longer than LS, raising your compression.

Putting the differences into a compression equation, you will end up with a little bit lower than stock compression, even less with your lower comp pistons.


so with my pistons 9.0:1 the compression would be around 8.8:1??

[young_ar]

so with my pistons 9.0:1 the compression would be around 8.8:1??

probably wat would they be in a gsr?

[monchiy2k]

what you all think about this setup its a benefit putting the gs-r internals for turbo or the ls internals ??

because what i read the gs-r came balanced and the ls doesn't in my opinion this setup will work better for high rev

[JoshDC2]

if you just put it in a gsr block you will be better off for one reason:

oil squirters!!!
at high revolutions and high heat oil squirters cool the underside of the piston as well as lubricating it better(lowering friction and thus heat)

LS and GSR blocks have the same deck height so if you put an entire GSR rotational assembly in an LS you basically have a GSR without the oil squirters.

The reverse would happen if you put a LS rotational assembly in a GSR block. ou would have an LS with oil squirters.



My opinion: Ditch the LS block. Save all of the internals. Get a bare vtec block(gsr or itr) and put all of your fancy internals in that.

DONT GET A B16A BLOCK lower deck height = no work
and less displacement.

/lesson

[monchiy2k]

its too much b20 running with turbo without oil squirts
i have read that is good to eliminate the oil squirt because the oil stop the
pistons travel

thanks for all the opinions but i would like to hear more..

[18c]

Forged pistons do not need oil squirters. Some people like to run them for peace of mind, I like the extra oil pressure.

I personally like having the girdle, even if it is only a 6point.

And i dont think you will change the compression because LS and GSR blocks have the same deck height.

I am pretty sure you will need dowel pins to make a vtec head fit nicely on an LS block? as well as tap the block for the vtec oil line?

[monchiy2k]

im still thinking thath the compresion would be lower with the gsr internals in the ls block.
This is my point:
The b18a1 has Displacement: 1,834 cc (111.9 cu in)
The b18c1 has Displacement: 1,797 cc (109.7 cu in)
If the deck heigt is the same then the diference its on the internals.
im rigth?

[banas]

aca saca los mocos por que la niña tbn es buena

me parece vien eso de vajar la comprecion y retacarle mas lbs

[onefst91hatch]

your compression witll be higher with the LS block and GSR internals.

GSR block with stock GSR crank stock length rods and stock US spec GSR pistons and stock GSR head you will be at around 10.0:1 compression. however if you transferred that over to an LS block with all the GSR internals and head you compression would be 10.55:1 from my research the deck hieght on a gsr block is 212.39mm and the deck hieght on a ls block is 211.84mm. so if you are running 9:1 compression pistons for a GSR and they are stock bor then you compression with the LS block should be somewhere around 9.3-9.6:1. hope this helps you out. gl with your build.

[monchiy2k]

ok thaks for all coments.....

[taggart_lumpy]

wow i just got dumber reading half the crap in here

[gunsup0331]

rod length has not shit to do with compression.

[RICK's-TOWING]

jesus christ.

[turbo4dr]

rod length has not shit to do with compression.

wow, you are an A+ student.

[Full-Race Henry]

Wow, There is a lot of incorrect information in this thread :hithead:

[gunsup0331]

wow, you are an A+ student.

?? My statement was correct, soooo whats your point?
all else being the same a longer/shorter rod will have zero affect on compression.

[Full-Race Henry]

?? My statement was correct, soooo whats your point?
all else being the same a longer/shorter rod will have zero affect on compression.

Thats incorrect.

You wouldnt be able to have all else being the same. If you use a gsr crank, you would use a gsr rod, if you use a ls crank, you would to use a ls rod.

However if you use the same piston with each of these combos in a 81mm B18 Block, Displacement is increased approx by 37cc and Compression will increase

[locash]

I say that all of you are idiots.

This isn't that complicated, and I just became as smart as Rick's Towing for reading this.

[gunsup0331]

lol, thats probly all true. Im not a super honda geek yet so im hazy on exect parts interchangeability.... i just didnt want someone buzzin through this thread to believe such a common misconception as the one i pointed out thx for helping clear up the fog

[gunsup0331]

oh and im still right. Compression increases with the change in swept volume not height in the bore