L92 heads, forged pistons
Originally Posted by skipperbisket
Erik, why the .070" bore? is that as "small" as you feel comfortable with running these big intake valves? might have to get a set of those off you soon when i come get that block. for stock stroke ofcourse (strokers are for pussies!!!!!)
what do you have against 4.0 stroke?????????
Originally Posted by racer7088
Th L92 reliefs are different with a much larger intake valve and wider valve spacing. I have recut several and with no cylinder head milling and certain cams you still might get away with a regular piston anyway but they definitely will hit earlier and on the outer edges of the OEM reliefs when they do.
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?
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?
Originally Posted by Cop Car
ok i spent 30 minutes searching all over and i never found information.
since the L92 heads are a diffrent angle, what kind of forged pistons do you need to run on a 4.00 inch bore motor.. and where can i find these expensive parts?
since the L92 heads are a diffrent angle, what kind of forged pistons do you need to run on a 4.00 inch bore motor.. and where can i find these expensive parts?
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.
Last edited by WizeAss; Jan 25, 2007 at 08:28 PM.
Originally Posted by Cop Car
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.
Originally Posted by Forteen3GT
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?????????
what do you have against 4.0 stroke?????????
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.
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FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by Forteen3GT
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?????????
what do you have against 4.0 stroke?????????
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by Cop Car
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?
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?
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
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
what about these .. only shows big bore , wonder if they do the same for their 4.030 6.0L sets
Originally Posted by racer7088
The 4.070 is for the actual L92 blocks at .005 over.
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------>
Originally Posted by 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
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
Originally Posted by skipperbisket
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.
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. FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
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.
Originally Posted by 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.
Frank
Originally Posted by 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.
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.
