The other is entry level, do it yourself, back yard Hot Rodding for a couple hundred bucks or free if you're careful. One is the at the very top of leading edge, aluminum, high performance heads for thirteen hundred dollars.
I don't want to turn this into a rant, but there really is no comparison between AFR heads and ported stock heads. Think about that for a minute.THIRTEEN HUNDRED DOLLARS. To summarize, I think 30 to 40hp with both properly ported heads and better intakes should not be a problem.ĪFR heads.the new MANTRA of the FFcobra forum.ĪFR heads cost 1300 dollars. The stock intake will probably hold back your head porting work to the tune of 20hp, maybe more if it's a high mileage piece that's all funky inside with carbon buildup etc. Taking a stab at it, I'd say the 35 to 40hp mentioned above could only be realized with a higher flowing intake system like the Trick Flow street, Cobra, GT40, Edelbrock, or similar.
The better they flow, the more the stock intake restricts them, and the more power you'll make once you rip it off the motor and replace it with something better! How much power the intake adds depends on how well the heads were ported. Knowing those limits and what to remove from where is key. The stock castings can only be taken so far. I'd say it should be quite obvious the level of added power depends on the level skill and knowledge the head porter has. Maybe a few folks out there can get more than that, but not without better, bigger valves, which don't help much since the ports are too small to support them anyway.Ī better intake setup will simply let the port work do it's thing. You can add 35 to 40hp, maybe a little more, to stock heads if you know what you're doing with them.
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