I was joking George, GEEZ your such a stiff!!!
As for rods, I'm relying on you to get those dimensions together for the custom CNC titanium rods. I'll pay for them if I have to, no one makes rods for the LSJ, so if I have to get custom ones, why not make them handle 2000 hp

 

i cant wait until the day you sell your cobalt

 

God damn! I never finished my mechanical engineering degree. And I don't know the first thing about designing rods. Adapters, no problem, but high stress engine parts...that's a little out of my league I fear. I guess I could try to duplicate a high performance rod for a 2.2, but modify it to fit the LSJ.

 

The rods in the LSJ are good to past 500hp so they will work. JBP does make rods for the LSJ (through Pauter) and they are a better design for higher hp output.

 

You might want to look into aftermarket 2.2 piston/rod combo as Al suggested. Could be a lot cheaper and easier. If my motor has to be pulled, thats the route I am going, 2.2 stroker. Forged 2.2 parts are cheaper than the non-existant LSJ aftermarket. Unless you want to pay JBP prices, and god knows how long they will last.

 

I think it would be cheaper to pay someone to custom design and make rods, than it to order them from JBP. I mean ****, they charge $350 for a K&N Intake!!!

 

When are you Americans going to figure out/accept that JBP is a Canadian company. That means everytime JBP buys parts from an American company, JBP pays duty to get it to Canada. That is also likely one of the reasons why JBP says it will be cheaper to get their parts through one of their dealers. You should think about calling Intense (JBP dealer) and see what kind of price you can get. The phone call is a small price to pay to see if you can get some LSJ aftermarket rods at a better price than something made in the US shipped to Canada and shipped back to the US.

 

Did Mahle make a set of 8.5:1 forged pistons for the LSJ?

https://www.cobaltss.net/forums/2-0l-lsj-performance-tech-47/new-mahle-forged-4032-aluminum-phosphate-coated-pistons-38824/


http://www.importperformanceparts.ne...ak-ecotec.html

 

crateenginedepot.com has some stuff,
http://www.crateenginedepot.com/stor...-P327C131.aspx for piston, ring, pin set yield 9:1 with stock gasket the price is $812, bit higher side.

 

I would order those, but I've heard the wrist pin is the wrong size. I'll do some research and see if the pistons are usable with some machining.... Hell, I work at a machine shop!

 

It doesn't specify the LSJ, which most of the time means they are for the L61. Slightly different bore, rod length, wrist pin dia., and etc.

 

Lol, good to know

 

I just got done going through the same thing you're about to go through. Custom rods from most companies will cost over $700 and will take 6-8 weeks make, if you can wait then thats the way to go. After market rods for the 2.2 will work except the big end of the rod if not the same size, so you'll have to get the crank machined to fit the smaller rods. Also buy your rods first then get the custom pistons to fit them, not vise-versa. I took the long stupid way and my car if finnaly close to being back together after four months.
Good luck

 

What is the problem with the Mahle pistons? I've been trying to find out, but can't find anything.

 

I think they were machined completely wrong like made to large for our bore.

 

Oh well I can fix that. I'm gonna order the Mahle pistons and just make em work. I'll just machine them until they fit right. **** you can't beat $403 for a set of 4 forged 8.5:1 pistons with rings and pins... unless those Diamonds you ordered were less...

 

You will have to re machine the entire side including the grooves. Then bore out the wrist pin. You also have to re machine all the reliefs. They were desinged to be strong the way they are, by tampering with the design they may not be as strong and could fail prematurely. It will also create a lot of heat to machine forged metal which could distort the grain boundaries of the metal causing it to fatigue, once again leading to premature failure.

Did you also know that forged pistons are typically not perfectly round due to increased thermal expansion in certian areas? Just another obstical to over come.

This is a very bad idea and I highly discourage you from doing it.

 

Even though others have done it with no problems, and my boss said it would be fine... my boss whos been building racing engines for 30 years, and is the crew cheif on a nitro funny car team.

 

Your money and your car. Do what ever you want. Personally I would rather pay to have them made properly than modify them. Cheaper is not always better.

 

I just sent an e-mail to Diamond, there, happy?

 

Yep. I don't see why they couldn't do it. Plus you could get a ceramic and/or moly coating from Diamond.

 

Diamond makes some quality pistons. They're not cheap but you get what you pay for.

 

Thats the problem, I don't have any money to spend. Yeah, they make a good product thats expensive, but is it worth it to have my car on jack stands for 2 months while I save up the money?

 

some times more then 2 months...... but in time it will be worth saving the money for the parts you have purchased

 

Well either way your going to have to get a new set of rods. Just think about the power you'll be making. If you make over 300hp that equates to 600hp in a sb chevy (4cyl X 2), not many stock rods can handle much more power than that. Better safe than sorry.