Arao 32 Valve heads?
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From: Seattle area
Teching In
Joined: Mar 2006
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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
Launching!
Joined: Apr 2007
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From: College Station, TX
I'm no expert, but I would guess that a valve train with 32 valves would be heavier than a valve train with 16 valves. If so, it would lower your high RPM hp and even lower your red line.
Launching!
Joined: Mar 2004
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From: Exton, Pennsylvania
Originally Posted by Shock Hawk
I'm no expert, but I would guess that a valve train with 32 valves would be heavier than a valve train with 16 valves. If so, it would lower your high RPM hp and even lower your red line.
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From: Jamestown, NY
Originally Posted by RussStang
The entire mass of the valvetrain would be more, but each individual part would be less. You could likely spin the engine up higher with a 32v layout.
Since the mass goes down the stability goes up at higher RPMs correct?
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From: Seattle area
I would imagine that engine has a lightweight rotating assembly which coupled with a positive displacement blower makes for amazing throttle response! 32 Valves in and of itself does not make an engine more responsive to the throttle. My Cobra had no where near the throttle response of my Vette. And neither does the Northstar or even the narrow angle 32V V8 in my wifes Volvo.
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From: Seattle area
I just don't get why people assume that 4 valve motors naturally have alot better throttle response. As far as SOTP a motor with more torque down low ie LT-1 is going to seem more responsive to the throttle. M3's have really good throttle response thats even made faster by the ECU but because you have to rev them to the moon they don't feel as throttle responsive as even something like a N/A Cobra or Mach 1.
Just 'cause it is more complex does not mean it is better...that is not true...the more advanced a concept the less moving parts. Stock 4 valve ford heads flow much less than ls1 heads. I have an 03 cobra with 503 rwhp at 14psi with kenne belle blower. Put 14 psi on a 4.8 ls1 with the same blower and you will easily get 500 rwhp. The reason fords need blowers is cause there heads do not flow. The heads weigh 65 lbs each compared to 25 for an ls1...guess what that does to your center of gravity with that extra 80 lbs 30 inches off the ground...makes the front end not want to follow the tires path.
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Joined: Aug 2004
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Originally Posted by LS17000RPM
You've never been in a built DOHC car then.
we get a lot of bike engined kit cars over here and the turbo ones REALLY move! you should see how fast a 1.5ltr Busa engine will rev!
oh and the guys talking about the ford heads, THEY ARE A BIG PILE OF
ford has done a good job one some of there 4 valves heads though. take a look at the duratec head its a work of art!
thanks Chris.
So back on topic, is someone coming out with these for LSx motors? 
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.
and btw, there are a couple lsx's in the 6 sec range with less than 2k hp