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 Post subject: Re: DCMike's V8 Locost
PostPosted: October 15, 2016, 11:22 pm 
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Joined: June 18, 2016, 12:39 am
Posts: 121
Laminar wrote:
horizenjob wrote:
Don't go with too large a head, from what I'm reading people are pushing 600 HP with just the 185 AFR heads, they make 3 sizes larger than that.


That's not 600hp naturally aspirated, though, right? The 185s outperform the 165s on a stock-displacement 302. The only advantage the 165s have is that you can use stock pistons. People like to simplify and claim that smaller heads will result in in better power down low. That's just not true.

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The Ford heads are economical and decent too.


AFR heads will easily make 60+hp over ported GT40 heads, arguably Ford's best setup.

The 165s are better down low, you just aren't thinking low enough. Do a back to back comparison test with an overdrive trans and a 2.73 axle, see which head cruises better. On your soul it will be the 165.


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 Post subject: Re: DCMike's V8 Locost
PostPosted: October 16, 2016, 11:14 am 
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Joined: March 30, 2011, 7:18 am
Posts: 1409
Location: central Arkansas
If you're running throttled, the port size is very nearly irrelevant.

At full throttle and low RPM you might lose something, but it would likely be lost in the intake runner effects. And if the cam is nontrivial, both will be lost in reversion effects. The port is only a small part of the whole system.


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