Arao 32 Valve heads?
well isnt that neato lol.
fastest lsx i've heard of was a guy running like 6.80's at 205 mph with a blown/tt setup pushing 16xx hp. he posts on here sometimes, forgot his name.
fastest lsx i've heard of was a guy running like 6.80's at 205 mph with a blown/tt setup pushing 16xx hp. he posts on here sometimes, forgot his name.
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The N/A Cobras flow better than people believe, I talked to HP about a TT system when I had mine and was amazed at how a little 4.6 could put out as much power w/o a whole lot of boost.
Robert's 2001 Cobra is bone stock except for the HP twin turbo kit, the gauge package and sub-frame connectors. HP Performance did the installation on this car, and Robert drove it 500 miles back to Dallas/Ft. Worth, TX, where he is from. The car pulled strongly on the dyno, registering runs of 479 rwhp / 498 rwtq @ 7 psi, 510 rwhp / 542 rwtq @ 8 psi and 517 / 530 rwtq @ 9 psi
And 9 psi isn't really anything on those motors, and these are with pump gas!
A good meth injection system and intercooler and even more power is possible on pump.
Robert's 2001 Cobra is bone stock except for the HP twin turbo kit, the gauge package and sub-frame connectors. HP Performance did the installation on this car, and Robert drove it 500 miles back to Dallas/Ft. Worth, TX, where he is from. The car pulled strongly on the dyno, registering runs of 479 rwhp / 498 rwtq @ 7 psi, 510 rwhp / 542 rwtq @ 8 psi and 517 / 530 rwtq @ 9 psi
And 9 psi isn't really anything on those motors, and these are with pump gas!
A good meth injection system and intercooler and even more power is possible on pump.
Hell for the cost of those heads would be half the funds i would need to buy an LS7 crate motor or build me a nice 408 or 427. And on a side note i bought my car for 9500 dollars and its just scary to me that i could go out and buy a set of heads that are damned near the same price of my car. Just my .02
as far as the heads go, i'm assuming the valvetrain is what makes the difference between a 2v 4.6 @ 8 pounds of boost making 415 at the wheels and a 4v 4.6 making 510 at the wheels with 8 pounds of boost.
i saw an 03 mustang gt with a kb blower on it making 415 at the wheels, needless to say, i wasnt impressed.
i saw an 03 mustang gt with a kb blower on it making 415 at the wheels, needless to say, i wasnt impressed.
just a thought just my .02 cents on the video with the 406 sbc w/the 32 valve heads maybe the engine displayed such great throttle response because it didn't have a flywheel or flexpalte on it. just a thought
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video of that 6 sec ls1 powered camaro.. one bad bitch for sure
video of that 6 sec ls1 powered camaro.. one bad bitch for sure
Originally Posted by rubin
http://www.nelsonracingengines.com/p...nes-tt427.html
does anyone know where the spark plugs are on this engine? theres a picture of the heads and it looks like theres no hole between the headers
does anyone know where the spark plugs are on this engine? theres a picture of the heads and it looks like theres no hole between the headers
HTH!
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Originally Posted by Ted J
They are similar to a Hemi where they are in the middle of the combustion chamber. If you look at the valve cover off to the one side, on the LSX head pictured in the link in the first post of this thread, you'll see that the plug for the spark plug is off to one side a little.
HTH!
HTH!
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Originally Posted by goodol'93z
just my .02 cents on the video with the 406 sbc w/the 32 valve heads maybe the engine displayed such great throttle response because it didn't have a flywheel or flexpalte on it. just a thought
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Originally Posted by Sunset'01Z
as far as the heads go, i'm assuming the valvetrain is what makes the difference between a 2v 4.6 @ 8 pounds of boost making 415 at the wheels and a 4v 4.6 making 510 at the wheels with 8 pounds of boost.
i saw an 03 mustang gt with a kb blower on it making 415 at the wheels, needless to say, i wasnt impressed.
i saw an 03 mustang gt with a kb blower on it making 415 at the wheels, needless to say, i wasnt impressed.
Remember that the 4V heads are the main difference in the engines, they allow the flow that actually lets them make power over 5500 rpm. And N/A its good for 60 hp PI to 32V. But the 4.6 2V heads are really setup for torque its one reason why some ford motors sucks so bad. OHC engines that are tuned to try to be OHV engines when they grow up. You end up with an engine like the 5.4 in the F150. Its a slug anyway you put it, slow to rev and a lower redline and power peak then the Generals OHV motors.
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Originally Posted by Sunset'01Z
what about the 99-01 cobra heads? what's the difference between those and the B heads?
Launching!
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Originally Posted by LS17000RPM
Yea, those Ford 4.6 DOHC heads are real piles... that's why John Mihovitz uses stock B heads fully race ported in his 6 second, 2000hp 4.6 which btw is faster than any LS1 car in existence.
Originally Posted by LS17000RPM
You've never been in a built DOHC car then.
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Originally Posted by LS17000RPM
Yea, those Ford 4.6 DOHC heads are real piles... that's why John Mihovitz uses stock B heads fully race ported in his 6 second, 2000hp 4.6 which btw is faster than any LS1 car in existence.
have a look at the inport market, EVERYONE is porting stock heads be it for race or street. there are very few aftermarket head about.
thanks Chris.
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As far as production heads go the B and C heads are actually pretty good. When the 96 Cobra came out the LT-1 was in full force so they had to do something to make 1.1 liters less displacement engine make power.
no one has mentioned the ZR1 32 valve engine. It made a whole 405 hp and ruined the handling of the car with the excessive front end weight. Tell me about a 4 valve engine that weighs 400 lbs and puts out 500 hp, almost that much torque, and is naturally aspirated. The fact that it is inexpensive and easy to work on are additional benefits. Ferrari's have the hp but no torque. The big mercedes v8s come close but are heavier and very expensive.