08-27-2006, 08:51 PM | #11 |
3v's are slow
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Its only pointless when you don't have a cam picked out. If you know in your cam profiles that you considering in your combo, knowing head flow #'s can be valuable.
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08-27-2006, 09:05 PM | #12 |
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but on the other hand there are a lot of people that pick there cam based on the rest of their setup (i.e. custom cam), making decisions on your goals for power curve, fuel economy, rpm range, specific usage, ect ... would be the first things to decide on .. then you have a couple decisions to make about how to go about meeting those goals. Knowing the flow rates is good general info either way imo. "knowledge is power"
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08-28-2006, 08:30 AM | #13 |
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Here's a tidbit of info for you guys:
Roush engine shop tested a 427 with a set of AFR 225's. Then, due to some unforseeable circumstances, needed to swap in another set of heads...DART, which is nearby Roush's shop, got them into a set of CNC 225's. Power was up 26 hp and torque was up 13 ft. lbs (everything else the same). And this was with a head that flowed less by the numbers at each lift.
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08-29-2006, 10:40 AM | #14 |
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Cool!
That is sweet and to think! I was just about to ask what the difference was in the gt-40 cobra and the gt-40 explorer! I was wondering, what year models on the ford explorer have these heads on them? and Do the gt-40 p heads have good enough valve springs for an E303 cam?
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08-29-2006, 03:14 PM | #15 | |
3v's are slow
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Quote:
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2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy |
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08-29-2006, 04:35 PM | #16 |
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IIRC, the first Explorer with the 5.0L (year?) had the actual GT40 heads like the '93 Cobra. Then the subsequent ones had the P's...
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08-30-2006, 10:02 AM | #17 |
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Just wondering. Why did ford make these different type heads? I mean if the heads made for the cobras flows nearly the same as the xplorer heads, why not just stick with one set of heads for V8's. I'm looking at cost and production. I don't get how ford would design so mean different things that are too closely related? I'm also not an engineer or automotive designer!LOL
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08-30-2006, 10:17 AM | #18 | |
3v's are slow
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Quote:
The 5.0 engine ended in the mustang in 95. 5.0 explorers didn't come out until 96 or 97
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2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy |
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08-30-2006, 12:30 PM | #19 | |
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Quote:
On a side note, the other reason why a set of P heads help performance is becuase of the smaller combustion chamber.... 59cc vs. the Gt-40 65cc.
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05-19-2008, 03:09 PM | #20 | |
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You would be suprised what we are doin in class racing with port volumes etc. It goes back to bigger isnt always better, its velocity, and speed that makes HP |
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