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Originally Posted by Do Work Son!  I hear ya, but i would love nothing more than to hit some et. in the tens and be able to bragg about a complete stock block and head setup. I'm only setting aside 1,500 for heads, and i want to see how far OE will go. |
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Originally Posted by Mike@TEA The power numbers they use to advertise their kits are actual flywheel horsepower and torque figures from a superflow 901. What they do not advertise is what other components are used to get those numbers. Those were made on a stock shortblock using their kit with an LS-6 intake. The same kit with a fast 90 will also produce 540 flywheel HP. I am posting 2 dyno graphs of all 3 of their kits one is with the LS-6 intake and one is with the fast 90/90. This is very good/accurate information that shows what power levels do with regards to camshaft changes and intake manifold changes. The heads on this motor were also unmilled and left at 64cc and stock Gm head gaskets were used. Enjoy.
LS-6 Intake http://i67.photobucket.com/albums/h2...packageLS6.jpg
Fast 90 Intake http://i67.photobucket.com/albums/h2...mpackage90.jpg
How much does 540 FWHP translate to at the tires ? 460-470 with a 228 cam! Imagine what would happen if the heads were milled to 58-59cc and and 240 camshaft is installed. You would probably make 570-580 fwhp which is exactly what all the 490-500 rwhp guys are doing with these heads. Those packages are very well thought out and proven but may be a little on the conservative side for most people on this site. It is my understanding they were designed to deliver good power with good driveability and still be easy to tune. The TFS 215 is about as good a head as can be bought for the 3.900 bore engines 5.7 engines regardless of what this flowbench or that flowbench says. |
In the Summit advertisement they say this kit will make 515 hp. with 10.5 compression. My question a stock LS1 is not 10.5 compression is it??