lsx 930hp
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Originally Posted by dreambird
possibly the highest naturally NA ls engine ? www.maxchevy.com 454 lsx
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Originally Posted by XLR8NSS
Those are C5R heads with some extras welded on for the extra bolts.
I dont think so man....I've seen the welded on boses and thse aren't them..Are you saying you know this for a fact?
http://www.maxchevy.com/tech/2007/ii_7-lsx-1.html
Matter of fact i'd bet money that they are the new heads....Look at the castings!!!!The look nothing like a c5r head..
Matter of fact i'd bet money that they are the new heads....Look at the castings!!!!The look nothing like a c5r head..
Experimental C5R head demonstrates a hand-ported combustion chamber (left) that was used to develop the CNC program for the seriously revamped casting. Opposite it, the chamber is finished from computer tape. Combustion chambers are a scant 27cc. Stealy used 0.051-inch thick Cometic MLS gaskets to seal the aluminum heads to the iron block.
Originally Posted by sr71bbjr
!The look nothing like a c5r head..
Since the first of the LSX-specific cylinders heads was not quite ready, the C5R casting needing some surgery. Four aluminum bosses welded to the bottom of the casting were drilled and milled to receive the extra studs in the LSX block. Compare these ports with those of the modified head.
Originally Posted by sr71bbjr
I dont think so man....I've seen the welded on boses and thse aren't them..Are you saying you know this for a fact?
From the page.
Originally Posted by BLK02TA
From the page.
lol well if thats the case the bosses look alot better than these...I still think the are the new castings..
https://ls1tech.com/forums/forced-induction/688160-6-bolt-afr-heads.html
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From: Rockfield Kentucky
Hi Guys
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
Originally Posted by Robin L
Hi Guys
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
So Robin...... any idea on the ETA for the GMPP 6 bolt heads????
Kyle
Originally Posted by Robin L
Hi Guys
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
First the bosses were welded to new castings prior to heat treat or machining. They started as C5R castings.
The "experimental" head was the head that we cut and ported. We used that head for development. 1 Port was cut, another hand ported and another CNC'd.
I am currently switching to a revised set of C5R heads. They have larger cumbustion chambers and wider intake bolt spacing as well as other small changes. Like the C5R heads they are not optimum for our large cubic inch nitrous combination. These heads were cast with the additional bolt bosses. This head will probably not be released.
GMPP is currently working on a version much better suited for large cubic inch LSX engines. I am sorry that I cannot discuss that head at this time.
I cannot wait to see these heads!
Robin
D.J.