300 with gm ls3 head
- Thread starter fastbarry
- Start date
gassercoupe
New member
Hello All
Well this guy did the LS head thing using epoxy of all things.
http://BangShift.com/bangshift1320/mad- ... nline-six/
My problem with the entire crossflow concept is the distributer clearance.
Do they even make an offset one for our engines and how much does it cost?
Nice Meeting You
Well this guy did the LS head thing using epoxy of all things.
http://BangShift.com/bangshift1320/mad- ... nline-six/
My problem with the entire crossflow concept is the distributer clearance.
Do they even make an offset one for our engines and how much does it cost?
Nice Meeting You
gassercoupe":a9v2ehsy said:
You could just go to a crank triggered ignition and Make dist REAL short.
gassercoupe
New member
I will say one thing for sure about the LS head engine.
It is real pretty.
That head sits there like it was always ment to be there.
It is real pretty.
That head sits there like it was always ment to be there.
gassercoupe
New member
I've been doing a lot of reading on the web about the LS3 heads and have learned a few things.
This is the first head that Chevy has put a 3 angle valve job on from the factory. Funny you would have thought they would have done so before now.
This head has really big valves 2.16 and 1.59 and is built in such a way as to require the chamber to be exactly over the bore. So its going to have to be welded up from 6 sections not 3.
Flows 360 cfm intake and 240 exhaust with a pocket port only. So this thing really is a big gun.
I did a lot of talking over the phone with guys that weld up racing motorcycle heads and they did not ever heat treat any of them.
You could consider artificial aging (bring the part to 480 degrees for between 12 and 24 hours) to aid dimensional stability and improve machining qualities. That temp is low enough that your valve seats and guilds should be safe. This applies to any alloy in the 3XX range.
I would consider helicoiling all threaded holes and using washers and shims under the head bolts and valve springs to prevent damage to the softer aluminum.
Merry Christmas to Everyone
This is the first head that Chevy has put a 3 angle valve job on from the factory. Funny you would have thought they would have done so before now.
This head has really big valves 2.16 and 1.59 and is built in such a way as to require the chamber to be exactly over the bore. So its going to have to be welded up from 6 sections not 3.
Flows 360 cfm intake and 240 exhaust with a pocket port only. So this thing really is a big gun.
I did a lot of talking over the phone with guys that weld up racing motorcycle heads and they did not ever heat treat any of them.
You could consider artificial aging (bring the part to 480 degrees for between 12 and 24 hours) to aid dimensional stability and improve machining qualities. That temp is low enough that your valve seats and guilds should be safe. This applies to any alloy in the 3XX range.
I would consider helicoiling all threaded holes and using washers and shims under the head bolts and valve springs to prevent damage to the softer aluminum.
Merry Christmas to Everyone
chopperman69
Well-known member
A guy named Bill in Tulsa sent me these pics a few years ago. I have not seen it in person.
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