Forged Boost 6.0L 364" /w 6.3" Rods & 402" Pistons, impressions?
Forged Boost 6.0L 364" /w 6.3" Rods & 402" Pistons, impressions? I have all the parts to put together a little different shortblock and I think I like the idea of putting the longest rod I can in the motor without going to far...
I have a stock 3.622" crank, standard 6.0L block, 6.300" Eagle H-beam Rods, Mahle 4.00" (402" stroker shelf pistons) forged pistons...
This would be a standard 6.0" but have a longer rod and would probably work better for the high rpm boost motor project...
Any impressions of the long rod setup?
I have a stock 3.622" crank, standard 6.0L block, 6.300" Eagle H-beam Rods, Mahle 4.00" (402" stroker shelf pistons) forged pistons...
This would be a standard 6.0" but have a longer rod and would probably work better for the high rpm boost motor project...
Any impressions of the long rod setup?
wouldnt it move the wrist pin farther up into the rings making things weaker?
and will the stroker pistons work without the stroker crank?
I know regularpistons wont work with crank, wonder if you can do the other
and will the stroker pistons work without the stroker crank?
I know regularpistons wont work with crank, wonder if you can do the other
You may be in for a problem with an iron block. Wiseco lists the deck heigth of the iron blocks .020 lower than standard LS1' blocks. That will put you .010 out of the hole to start with, before any clean up or deck truing. As stated previously it works out great on a virgin LS2 block though. I don't have an iron block to measure against but I don't think that they would have just made it up either.
Be careful with running the ring package farther up the bore in a forced induction application. Excessive heat will kill the rings, especially in the iron block where the heat transfer coefficient is lower than the aluminum. Coatings will help, as well as proper ring material selection.
pistons are designed to be at a certain deck height based on a number of factors, one of those factors is rod length.
if you use a piston setup for 6.125" rods on a 6.300" rod you are going to have many issues, main one is being way out of the hole at TDC
if you use a piston setup for 6.125" rods on a 6.300" rod you are going to have many issues, main one is being way out of the hole at TDC
Trending Topics
Staging Lane
Joined: Dec 2005
Posts: 75
Likes: 0
Originally Posted by Demon SS
pistons are designed to be at a certain deck height based on a number of factors, one of those factors is rod length.
if you use a piston setup for 6.125" rods on a 6.300" rod you are going to have many issues, main one is being way out of the hole at TDC
if you use a piston setup for 6.125" rods on a 6.300" rod you are going to have many issues, main one is being way out of the hole at TDC
Since he is using a "stroker" piston, the pin height is going to be further up the piston...
As long as his extra length on the rod is matched with the pin height being higher on the piston...There is no way he is going to have the piston way out of the hole...
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo your above statements would be true IF he is using a custom piston, he states he is usings a "shelf piston" , no one to my knowledge makes a shelf piston for a 6.3" rod,
so IF you use a piston for a 6.125" rod on a 6.300" rod it would be way out of the hole.
actually his stated combo is way mismatched; 3.622 crank, 6.300" rods AND 4.00" 402 stroker shelf pistons(402 stroker shelf pistons are setup typically for a 4" stroke and a 6.098 or 6.125 rod), these parts as stated will not work together.
so IF you use a piston for a 6.125" rod on a 6.300" rod it would be way out of the hole.
actually his stated combo is way mismatched; 3.622 crank, 6.300" rods AND 4.00" 402 stroker shelf pistons(402 stroker shelf pistons are setup typically for a 4" stroke and a 6.098 or 6.125 rod), these parts as stated will not work together.
Originally Posted by Demon SS
actually his stated combo is way mismatched; 3.622 crank, 6.300" rods AND 4.00" 402 stroker shelf pistons(402 stroker shelf pistons are setup typically for a 4" stroke and a 6.098 or 6.125 rod), these parts as stated will not work together.
If you would have taken the time to run the numbers instead of just running off at the cakehole you will find the combination is 100% possible. If it's not then someone ought to let the shortblock in my garage know. For all the math illiterates out there:
The formula for finding deck heigth is (stroke/2) + rod length + compression distance = 0 deck height. So let's plug in our numbers (3.622/2) + 6.300 + 1.125 = 9.236 inches. Nominal standard is deck is 9.240. On an uncut LS2 block mine was .008 in the hole before pistons were coated and the deck trued. Totally acceptable. Nominal deck heigth of an LS1 is 9.240
If anyone wants to know the part # for the piston it's a standard Diamond part # 11520. With the 15 cc dish , and 72 cc heads I can get anywhere from an 8.4 to to 8.75 compression ratio by very mildy adjusting deck heigth, gasket thickness or even chamber size.
Originally Posted by 96 Comp T/A
I would have expected more from a vendor If you would have taken the time to run the numbers instead of just running off at the cakehole you will find the combination is 100% possible. If it's not then someone ought to let the shortblock in my garage know.
For all the math illiterates out there:
The formula for finding deck heigth is (stroke/2) + rod length + compression distance = 0 deck height. So let's plug in our numbers (3.622/2) + 6.300 + 1.125 = 9.236 inches. Nominal standard is deck is 9.240. On an uncut LS2 block mine was .008 in the hole before pistons were coated and the deck trued. Totally acceptable. Nominal deck heigth of an LS1 is 9.240
If anyone wants to know the part # for the piston it's a standard Diamond part # 11520. With the 15 cc dish , and 72 cc heads I can get anywhere from an 8.4 to to 8.75 compression ratio by very mildy adjusting deck heigth, gasket thickness or even chamber size.
If you would have taken the time to run the numbers instead of just running off at the cakehole you will find the combination is 100% possible. If it's not then someone ought to let the shortblock in my garage know. For all the math illiterates out there:
The formula for finding deck heigth is (stroke/2) + rod length + compression distance = 0 deck height. So let's plug in our numbers (3.622/2) + 6.300 + 1.125 = 9.236 inches. Nominal standard is deck is 9.240. On an uncut LS2 block mine was .008 in the hole before pistons were coated and the deck trued. Totally acceptable. Nominal deck heigth of an LS1 is 9.240
If anyone wants to know the part # for the piston it's a standard Diamond part # 11520. With the 15 cc dish , and 72 cc heads I can get anywhere from an 8.4 to to 8.75 compression ratio by very mildy adjusting deck heigth, gasket thickness or even chamber size.
I have built these before and it works great, keeps the piston from coming out of the bottom of the bore for better piston stabillity and gives a better ring seal, just be sure to use a hellfire or a stainless top ring.
Whew! I was getting worried there with a few of the random ideas going around..
Ok so it would totally work? I think im going to put this together with the long 6.300" rod, it should make a killer rpm turbo motor....
I'll remember that on the hellfire/stainless top ring...
Ok so it would totally work? I think im going to put this together with the long 6.300" rod, it should make a killer rpm turbo motor....
I'll remember that on the hellfire/stainless top ring...
Originally Posted by stang/cobra_killer
the gasket with .06 clearance isnt going to be enough if you need .01 of clearance because you have to have .06 of clearance to spare
The pistons are lighter and the rods are slightly heavier, not really any significant gain in weight as far as I can tell....
Improving rod ratio, less side load, etc, all good benefits to running the longest rod within reason you can. I see no reason not to build a motor with a 6.300" rod when they cost the same as 6.125" rods...
Improving rod ratio, less side load, etc, all good benefits to running the longest rod within reason you can. I see no reason not to build a motor with a 6.300" rod when they cost the same as 6.125" rods...