cobaltBlackss

Hey guys quick question. Does anyone know if the 2.2 rods and the 2.0 rods have the same big end diameter? If they do it will save me alot of time and money. If anyone has any info on this please share.

soulonfire04

Sorry about the melted piston that sucks. You might want to check out WISECO they make the pistons used in the ECOtec race engine

CobaltBurst

stick with the 2.0 connecting rods... the 2.2 arnt rated for over 250 or 300 hp. how did you melt a piston?

NJHK

You wouldn't be able to use the 2.0 pistons on them. I believe the Pin Diameter is different.

cobaltBlackss

I allready have my pistons with the 2.2 pin diameter, I just need to know if the part where the rod connects to the crank is the same size.

NJHK

Wait...they are the same?

cobaltBlackss

I just need something official to show the machine shop

Blown 4-banger

I'm assuming the melted piston had something to do with the meth...

cobaltBlackss

nope, the 22lbs of boost and a lean AFR. But this is nothing new I posted my disaster in Nov.

CobaltBurst

im guessing they do have the same... in the ecotec build book it suggests replacing the 2.2 rods with the 2.0 when swapping pistons.

Halfcent

You can not use the LSJ rods in a L61 without using the GMPP piston set specifically for that application. That is what the build book talks about. The LSJ rod uses a larger piston pin and has a different length. The crank journal is the same.

If you already have a set of L61 pistons, then you need a set of L61 rods. Eagle make the perfect set fairly cheap as well.

CobaltPerformanceParts

2.2 rods and pistons should fit without a problem. As long as you dont try to mix and match between the two.

I believe the c-c lenth on the lsj rods are the same as the l61 rods.

Here is some info that was dug up by me and sunfire joe.

Rod C-C Lenth.........................144.84mm or 5.702 Inches
Thickness above Rod Pin............6.01mm .237 inches
Small End width Rod..................24mm or .945 inches

Connecting Rod
ˇ Connecting Rod Bearing Clearance 0.029-0.069 mm 0.0011-0.0027 in
ˇ Connecting Rod Bore Diameter - Bearing End 52.118-
52.134 mm
2.0519-
2.05252 in
ˇ Connecting Rod Bore Diameter - Pin End 20.007-20.021 mm 0.7877-0.7882 in
ˇ Connecting Rod Side Clearance 0.070-0.370 mm 0.0028-0.0146 in
ˇ Connecting Rod Straightness - Bend - Maximum 0.021 mm 0.0083 in
ˇ Connecting Rod Straightness - Twist - Maximum 0.04 mm 0.0157 in

Crankshaft
ˇConnecting Rod Journal Diameter 49.000-
49.014 mm 1.9291-1.9297 in

cobaltBlackss

I allready have diamond pistons that were custom made to fit the eagle rods, I just wanted to make sure the eagle rods would fit my crank. Thanks CPP

Halfcent

Wait, I misunderstood. You have an LSJ. I thought you had an L61.

You have a problem. If you have Diamond pistons made for an L61, you are not going to be able to use them in your LSJ.

Here's how it works. This is a commonly confused issue:

You can use a COMPLETE rotating assembly from any LSJ or L61 in any LSJ or L61. By complete, I mean crank, rods and pistons.

You CAN NOT use just one part of a rotating assembly from one engine with the two parts from a different engine. There is ONLY ONE exception to this rule. You can use LSJ rods in an L61 engine IF you use the GMPP piston set made specifically for that purpose (as I said in my previous post)

You have an LSJ crank and L61 pistons. The only way you are going to get those to work together is with a custom rod. LSJ and L61 rods are not the same length.

The best thing you could do is return your pistons and get the correct ones.

cobaltBlackss

^^^Well actually they are lsj pistons, they just have a different pin size. I think we have a little confusion over whether or not they are the same length. If I have to order custom ones it could take 6 weeks and cost lots of money.

CobaltPerformanceParts

2.2l rod length is 5.767
looks like the 2.0l rod length is 5.702

Halfcent

^^ If I remeber correctly, that comes out to be 1mm difference. I think I read that somewhere before.

M88ArRamadi

I know this is an old post BUT.....what are our connecting rod options for the LSJ? Besides JBP.

sunfirejoe

iTrader: (1)

only people i knwo of are JBP, but theyt are titanium so they will last, for the price they have offered seems about right for titanium