L67 Rebuild, Which pistons are you guys using?

[2KSexsei]

I am currently rebuilding a L67 out of a 2000 SSEi, I see in signatures different pistons are being used, but can't seem to find where to buy? I am boring the engine .030 over and would like to know what you guys think I should put in it. I will probably do a cam, rockers, and maybe an IC in the future. Thanks for the help.

[dangrus4060]

I used the L32 Powdered Metal Rods when I rebuilt my L67 last year. Working great!

[2KSexsei]

BTW, the engine is going is a front engine alcohol 1/8 mile rail

[00Beast]

Here's Intense's Hardcore engine page, they sell Diamond pistons. Not sure on the price, though. Over $100 each, ouch.


http://www.intense-racing.com/Merchant2 ... y_Code=PBF

How many HP are being planned? That will ultimately decide what your plans are. Like the old saying goes, "How fast you can go is directly proportional to how deep your wallet is."

[2000Silverbullet]

Go forged.
They are more expensive but are much stronger than powdered. The OEM pistons are powdered and they will break under high loads and cycles. Powdered are better than cast but forged are the best.

[willwren]

Paul, stock L67 pistons are forged, not powdered. S3 rods are powdered, S2 timing gears are powdered, but not the pistons.

[2KSexsei]

I am not going for a ton of power, my main goal is consistency. I am not really worried about E.T. or insane trap speeds. I am not looking to build a high dollar balls out engine, just looking for somewhere to start. I know the engine will be way way low compression for alcohol, but i don't want to have to worry about smashing valves either..

[2KSexsei]

00Beast, The wallet isn't very deep at the time being, I modeled up the chassis for the rail using solidworks and have sent the Material list for the chromoly to a couple race shops around, and have located a transmission I can borrow for next summer. So, I guess I will see where I am at for an engine budget at that point. A buddy and I are currently in the process of writing up a prgram for the CNC lathe to notch the pipes(because we are lazy like that).

[2000Silverbullet]

Paul, stock L67 pistons are forged, not powdered. S3 rods are powdered, S2 timing gears are powdered, but not the pistons.

Funny, I read somewhere that they were. That and the thin land area above the top ring contribute to the breaking around the top perimeter like yours and many others have.

So not only metallurgy but actual design of the piston makes a big difference.

[2KSexsei]

Not to change the topic here, but I just bought a complete L67 with 80k on it, the shop I bought it from says it has a bad bottom end. The blower was bought from GM less than 5K ago. I paid $300 for it.. Think I did good? or is that high?

[00Beast]

Not a bad deal, considering a new S/C is expensive.

[2KSexsei]

About what does the blower run if a guy were to go to the dealership to get it?

[Wes]

I asked the dealership out of curioutity one time......its ridiculous. It was in the $1500 range. direct from magnuson i believe the guy said.

[2KSexsei]

Wow, Thats alot of cash.

[01bonneSC]

Just curious as to why you are running a 6 in a rail car? I know its different and all that.

[2KSexsei]

First off, just to be the oddball. Second, these engines are extremely reliable, and in the world where being dead on run after run is all that matters.. It's great.

[99bonnieSE]

i'm kinda interested in this. Post some pics of when she's in!

[2KSexsei]

It is going to be awhile before I get anywhere on it. I am being sidetracked and spending my free time working on a program to produce an intercooler plate similar to the one the W body store sells..