Well I was gonna sleeve my B18 and build a 2.0l liter, but I'm thinking for now, mabey just do a 1.8L with **** I got sitting around. I have a LS block and crank, and a B16 bored .25mm over w/ CTR pistons. I'm thinking of putting the CTR pistons in the LS, and using the ITR rods to help the rod to stroke ratio. The stock ls rods are at 5.394, where as the ITR rods are 5.430, so that should get my compression up to about 12.5-13.0:1, and help my rod/stroke ratio a little. Has anyone tried anything like this in the past? I'm going to be running a ported head, and I'm thinking probally BC spec IV's, RMF header, and TWM 50mm's. I'm just wondering how killer I could make a All-motor setup utilizing OEM bottom end parts. Oh yeah, I plan on adding oil squirters to the block also, for cooling purposes. Would all this menagery of OEM parts conglomerated together even work? I'm kinda worried the extra .036mm might make it a little too tall. Anybody got any experience with such a setup?

 

your not going to use gsr/itr rods in an ls block with an ls crank, get yourself an h22

 

bro do a search...u defeat the purpose of LS/VTEC using those rods...read b4 u ask dumb question

 

Oh it will raise your compression alright.

It will also pop your pistons right out of the cylinder and into your head/valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rukusmasta2 &raquo;</TD></TR><TR><TD CLASS="quote">bro do a search...u defeat the purpose of LS/VTEC using those rods...read b4 u ask dumb question </TD></TR></TABLE>

How does that defeat the purpose of LS vtec? I thought it was better to have longer rods for a better rod-stroke ratio. I have done several searches and read tons of threads. I'm just trying to find out if this will work.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PURPLETERROR aka BIGMATT &raquo;</TD></TR><TR><TD CLASS="quote">your not going to use gsr/itr rods in an ls block with an ls crank, get yourself an h22 </TD></TR></TABLE>
H22 NEVER!!! BTW did you see that this is junk I have sitting around? I have no rods to I just need to find out what would work best. If I have to buy rods I want something that will better the overall build. I have no H series garbage anywhere.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LsVtec92Hatch &raquo;</TD></TR><TR><TD CLASS="quote">Oh it will raise your compression alright.

It will also pop your pistons right out of the cylinder and into your head/valves.</TD></TR></TABLE>

.036" man it seems like a mile after reading that. If I have to run a thinker headgasket that is fine, I was just trying to get a better rod-stroke ratio, that and I had to machine 1mm off each side of my B16 rods, and w. ITR rods I won't have to do that, but with b18 I will.


Modified by CRXBart at 6:51 PM 11/26/2005

 

Am I getting this whole rod to stroke ratio thing wrong? Should I be wanting shorter rods? I just saw that b17 rods are 5.208" b17s are supposed to be so sought after, is short rod length what i want? Man I'm confused now.

 

The b17 also has a shorter crank throw.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LsVtec92Hatch &raquo;</TD></TR><TR><TD CLASS="quote">The b17 also has a shorter crank throw. </TD></TR></TABLE>

Yes it was shorter than a b18, but longer than a B16, but the rod is still substantially shorter than a B16 rod. Anybody want to clear this up for me?

 

rod length to stroke ratio...

a b16b thrives at very high rpm and it is a short stroke long rod engine.. i belive the rod ratio is somewhere near 1.84.

a longer rod (to an extent) is what you want. As long as you clay the engine and dont have clearance issues, its a good setup, because it will have a better rod to stroke ratio than both an LS and a GSR, plus higher compression than a normal LS/LS or GSR/GSR bottom end combination.

 

edited.....im an idiot

Dave


Modified by Surubasi00 at 10:24 AM 11/27/2005

 

B17A 5.208 81.4mm stroke
B16A 5.290 77mm stroke
B18A/B/B20B/Z LS/CRV 5.394 89mm stroke
B18C/GSR/Type-R 5.430 87.2mm stroke
All B-series rod lengths, and their strokes. I'm not sure what the B16B rod length is. I' m fairly cetain it is the same as a ITR, and the stroke is 77mm same as a B16A, but correct me if I'm wrong. So the famed short rod B17A is the odd ball, and the shortest rod. So why does everybody talk so much about the B17A? I would think that my proposed setup would work fine, assuming that the head, and valves don't interfer. Even if they do I could just run a thicker head gasket right? I know somebody has tried this, please shed some light onto this subject.

 

DO NOT USE ANY DIFFERENT RODS IF YOU PLAN TO USE THE LS CRANK

dont watse anymore time with a b17 either

use the LS rods with ARP rod bolts and B16 or ACL bearings

you shouldnt use those CTR pistons, your compression would be retardedly high, and i doubt you would get to motor to turn over because you would crush your valves, and have alot of valve adjustment problems depending on your cams

go with the LS rods with ARP rod bolts, ACL bearings, and either P30 or P73 pistons

 

LS crank, ITR rods and CTR pistons will yield a combination that will put the pistons 0.025" out of the hole so you would need a thick headgasket for this to have a chance of working. It's not only the length of the rods but also the fact that CTR pistons have a slightly different compression height as well.

 

Thanks for the additional info.

 

GSR rods are 2mm narrower on the big end than LS rods

 

Opps, yeah I forgot about that, but that pretty much settles it then, this combo is a no go.

 

Hey bart how about we get together and build our **** together? I got all my **** now. I'm ready to rebuild. B16 turbo summer 06. JG engine dynamics replaced all my **** now i just have to put it back together, BASTARDS.