ET Performance heads
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From: Warrenville, IL.
ET Performance heads anyone here running a set of ET Performance heads ? Specifically the 215cc version.
http://www.ls1speed.com/catagory.cfm...in%20/%20Heads
http://www.ls1speed.com/catagory.cfm...in%20/%20Heads
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Joined: Oct 2005
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From: Sandwich, IL
Those are the exact heads I ordered. Still waiting for them to arrive but it shouldn't be much longer 
From all the research I did on heads the conclusion I came to was these are the best heads for a stock bottom end LS1. They look fantastic and should slightly outflow AFR205's! I highly recommend these heads if money and time are not an issue (takes a few months to get them).
From all the research I did on heads the conclusion I came to was these are the best heads for a stock bottom end LS1. They look fantastic and should slightly outflow AFR205's! I highly recommend these heads if money and time are not an issue (takes a few months to get them).
Last edited by darrensls1; May 26, 2006 at 08:43 AM.
I wouldn't get the 977 springs if they are still shipping with them. Although I haven't even ran my set yet, I've seen enough complaints about them on here to go ahead and swap them out.
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12 Second Club
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Joined: Jul 2004
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From: Warrenville, IL.
How do these heads compare to a set of Patriot LS6 stage 2 heads which are about a grand less ?
Looking at flow numbers while the ET's outflow the Patriots on the intake, the Patriots actually outflow the ET's on the exhaust. I assume the slightly larger intake valve on the ET's (.020") is where the bigger flow numbers are coming from on that side. Is there more to a good set of heads besides flow numbers ?
Looking at flow numbers while the ET's outflow the Patriots on the intake, the Patriots actually outflow the ET's on the exhaust. I assume the slightly larger intake valve on the ET's (.020") is where the bigger flow numbers are coming from on that side. Is there more to a good set of heads besides flow numbers ?
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flow numbers
Originally Posted by SLPSS01
How do these heads compare to a set of Patriot LS6 stage 2 heads which are about a grand less ?
Looking at flow numbers while the ET's outflow the Patriots on the intake, the Patriots actually outflow the ET's on the exhaust. I assume the slightly larger intake valve on the ET's (.020") is where the bigger flow numbers are coming from on that side. Is there more to a good set of heads besides flow numbers ?
Looking at flow numbers while the ET's outflow the Patriots on the intake, the Patriots actually outflow the ET's on the exhaust. I assume the slightly larger intake valve on the ET's (.020") is where the bigger flow numbers are coming from on that side. Is there more to a good set of heads besides flow numbers ?
Yes, there is a lot more too it than flow numbers,though it is a very easy numerical comparison, it does not seperate one head from another. Take two heads that flow very close to the same and one makes 40-60 more hp. I see it all the time. the 11 degree valve angle and moved valve centerlines allow for a much more efficient fill of the cylinder. The spark plug location, etc. Our flow numbers posted are without a pipe. They are much higher with a pipe.
There was a 383 vette on the dyno at my local shop with a mild cam and 215's. The thing put down 475 on a Mustang dyno. It made a believer out of me as far as the heads go. That thing was sick, and it sounded almost stock.
-Geoff
-Geoff
