HP estimate with new setup
12-07-2015, 04:28 PM
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HP estimate with new setup I just bought a set of ported 243 heads that will be going on the car either this weekend or the next. With the MS3, LS6 intake and re-tune, what do you reckon my WHP would roughly be? This will be on a mustang dyno. other mods are lid, SLP long tubes, non-catted SLP exhaust and 3.31 gears. intake flow #s:
.500- 292cfm
.550- 300cfm
.600- 311cfm
.650- 321cfm
.700- 324cfm
They are also milled .002'' dropping the chamber size to 65.4cc. 2.00/1.55 valves
.500- 292cfm
.550- 300cfm
.600- 311cfm
.650- 321cfm
.700- 324cfm
They are also milled .002'' dropping the chamber size to 65.4cc. 2.00/1.55 valves
12-07-2015, 04:31 PM
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243 heads have a 64cc chamber volume. Not sure how to mill them to 65+ cc.
Assuming you meant something like 62cc, I'd say 440-ish
Assuming you meant something like 62cc, I'd say 440-ish
12-07-2015, 04:57 PM
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If the chamber were reshapped you could have to mill them to get that volume.
Flow bench numbers without test procedure specs mean nothing and with those specs mean little. If flow bench numbers meant much LS3 heads would be worth 25% bump in power but they manage a third of that, maybe at peak and less at other points.
You have a bench racer's delight let us know how it works.
Flow bench numbers without test procedure specs mean nothing and with those specs mean little. If flow bench numbers meant much LS3 heads would be worth 25% bump in power but they manage a third of that, maybe at peak and less at other points.
You have a bench racer's delight let us know how it works.
12-07-2015, 05:08 PM
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Just trying to get an idea. They were CNC ported and milled. Even if they were virgin 243s, they would still be a drastic improvement over the stock (minus valve train) 853s on it now.
12-07-2015, 05:13 PM
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These same heads apparently made 480 WHP on a stock bottom 6.0 LQ4 with ARH headers, NNBS truck intake and smaller comp cam.
Granted, that's a 6.0L and was probably a Dynojet not a Mustang Dyno.
Granted, that's a 6.0L and was probably a Dynojet not a Mustang Dyno.
Last edited by rugbyguitargod; 12-07-2015 at 05:18 PM.
12-07-2015, 05:44 PM
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480 on an engine Dyno. Probably closer to 510 with my intake and cam (dude was running a custom comp cam with close to .600" lift, but less duration than the MS3 and was using a truck intake).
Factoring 12-15% drivetrain loss I am guessing 445. With the mustang Dyno that it gets tuned on, I'll say 410.
Factoring 12-15% drivetrain loss I am guessing 445. With the mustang Dyno that it gets tuned on, I'll say 410.
