WizeAss

iTrader: (5)

I assume he has pistons being made with reliefs for a 4.030 bore.... the .070 is more of a custom application for sleeved motors and those going all out and sparing no expense..... am I right about this Erik......... ?

what do you have against 4.0 stroke?????????

WKMCD

iTrader: (2)

I'm running 2cc pistons and Bret cut some fly cutters for the L92 heads.

Cop Car

iTrader: (14)

ok, if you guys want to know specific stuff make a thread. nobody has conclusivly answered anything i dont think...

what would be the specs needed to run forged pistons with L92 heads on a stock bore (4.00) 6.0. how big of a pocket would be needed for the valves, and is anyone making mass production pieces?

WizeAss

iTrader: (5)

TO ANSWER YOUR QUESTION: need custom pistons..... 4.00 bore motors are not the best bore size for the 2.16 intake valve due to shrouding....... get more bore.... the more the merrier.

You will need to cut reliefs in a flat top to make it work. That is what I believe Koenig is doing/saying. No need for a new thread. this is all the same subject.

Cop Car

iTrader: (14)

we all know that the biggest bore possible is always best. but if you go up to a 4.125 bore you shoudnt be running L92 heads.

WizeAss

iTrader: (5)

with a 4.125 I personally would use LS7 heads..... or go with ET big bore heads. 265+ runners and 70cc chambers etc etc...... but heck I am far from knowledgeable about big bore setups.

skipperbisket

iTrader: (4)

new sleeves are unnessecary for a 4.070" bore on a 6.0L block. If Erik thought I could spray the nitrous I will spray on a .070" bore then I am more than happy to, and if that bore leaves the cylinder walls to small then I would stay smaller. Let Erik answer the questions posed to him, you have no idea what you are talking about, let the man that knows the parts speak for himself.

skipperbisket

iTrader: (4)

definatly not always true...

fast98

iTrader: (16)

guys the 4.070 are prob for a honed l92 block.

SUTTERERMAN85

iTrader: (42)

i would have to agree there or possibly bored and then honed anyways.

racer7088

The 4.070 is for the actual L92 blocks at .005 over.

racer7088

The L92 doesn't just have bigger valves it also has wider valve spacing and puts the bigger 2.160 intake valve closer to the bore so it is much more shrouded than a normal LS1 head. The L92 exhaust valve is moved way over against and also even closer to the bore and would probably hit on the outer edge of a normal LS1 relief for sure.

I am having some sets of L92 specific 4.005-4.030 pistons made for the reg 6.0 iron and LS2 block engines and the bigger 4.065-4.075 L92 block bores

cws T/A

iTrader: (3)

http://www.wiseco.com/PDFs/Wiseco-Ch...PistonKits.pdf

what about these .. only shows big bore , wonder if they do the same for their 4.030 6.0L sets

racer7088

Yes those are the ones Brian Nutter was talking about with the universal reliefs and the big bore which makes it easy to get the mega relief on there.

WizeAss

iTrader: (5)

ooops..... I forgot about what you said with those L92 blocks.... that is right. They are 4.065 bore engines......... cool.

So what piston assemblies do you have for a 4.030 bore on the L92 Erik??

nevermind.... i read a little further------>when will you have a set of L92's done for the 4.030 ??? Trying to see how long till my engine makes its way thru your shop? Money is coming this weekend from Billy.

WizeAss

iTrader: (5)

New sleeves would be necessary on a Iron 6.0 block and a .070 overbore.... I forgot about the L92 specific block which is 4.065... like I said it is for those who arent on a tight budget.... my block is less than 600... L92 block is around 1200 ish or so.

I would not even think of going more than .060 on a Iron block even with sonic/pressure testing or whatever they call it. with spray .060 is likely too much ..... but heck I am sure Erik has his facts on this subject and my disagree.

racer7088

No we were all confused on the L92 block VS the regular 6.0 block. We do the 6.0 blocks from 4.005-4.030 usually but have done some up to 4.060 with no problems but I wouldn't usually start there.

StingrayCrazy

iTrader: (5)

Eric, I was planning on using the stock 6.0L 4.000" bore and the L92's since my block is new. Also since I'm going FI I could use the extra meat in the cylinder walls. Any trouble with the stock 6.0L bore clearing the valves?

Frank

racer7088

I dont know but it's hard to find a 6.0 block that is really 4.000 bore as most are at least 4.0010 or 4.0015 that we get. I would do a piston that could work in your block.

WizeAss

iTrader: (5)

thanks for the comment. Some people like to make me look like a fool out of there own enjoyment..... even if I am not as clueless as they seem to think. I dont know as much as some... but I spend more time researching and catching up them almost anyone out there.