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  #31 (permalink)  
Old 12-26-2012, 10:52 PM
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Originally Posted by BuzzLOL View Post
.. I would have used flat top pistons for a cam that size and just added some kerosene or other octane booster to the gas if needed. Yielding 500+ HP. Better MPG for extensive street use. I like to make power with high compression and great heads, self-ported, with backcut radiused valves and radiused seats, rather than an oversized cam like the XR300...

.. Although not a high compression engine, this article shows how an engine with well ported stock heads and a smallish 204/214 cam can make a surprising amount of power:

Chevy Small Block Build - Mildly Amusing - Super Chevy Magazine

.. And this dyno chart compares 11:1 350" (top curve) to 11:1 327" (2nd curve) and 9:1 350" (bottom curve). Both 350's have same cam, 327 has slightly smaller cam. Shows what high compression can do for you:


if you have readed form the start you would have seen that i will be running this cam for my set up comp cam xr282hr-10 with 510/520 lift and 110 lobe sep with 1.6 roller rockers which makes 544/555 lift. not the xr300hr cam . i feel the xr300hr is a bit of a over kill for a street car.

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  #32 (permalink)  
Old 12-27-2012, 03:30 AM
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.. Yes, that's why I agreed with you... use the XR282 cam... or even a smaller one... not the XR300 cam someone suggested... re-read what I said again...
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  #33 (permalink)  
Old 12-27-2012, 03:17 PM
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.. Yes, that's why I agreed with you... use the XR282 cam... or even a smaller one... not the XR300 cam someone suggested... re-read what I said again...
yes flat top pistons would of been better , the scat kit i got come with 19.80cc dish pistons , so i replaced them with the 12.80cc dish ones. i did look at flat top frist but they push my compresson up to 11.1+ , i did'nt want to have the piston down in bore as wanted good quench , so i went with the 12.80cc so i can deck the block to zero and have good quench at .041 and a fair compression at 10:1 . another thing was the cambers in my heads a 65cc so if i had the 75c one's i would of been flat tops.
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  #34 (permalink)  
Old 12-27-2012, 03:23 PM
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.. I would have taken the 11:1 and the 500+HP... and higher MPG...
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