germeezy1

http://www.nelsonracingengines.com/video_dyno.html

Its in the supercharged section

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

JPMuscle

ah thanks... im an idiot



I dont think Ive ever seen a RPM tach move that fast

chuntington101

Nelson does build some amazing engines! one dya i will own one. lol

rubin the plugs are in the normal locations. they use brodix heads i think.

also heard hes coming out with a 2300bhp LSX soon!

thanks CHris.

JPMuscle

are there any videos of their 702 Giant floating around anywhere

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.

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.

TMar99Z28

After seeing that video of the 32v blown 383 I am really excited to see the results of the lsx version of those heads.

JPMuscle

Since the mass goes down the stability goes up at higher RPMs correct?

germeezy1

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.

germeezy1

I would be curious if true 32V pent roof heads could be incorporated similar to how they made the SHO engine and 3.4 DOHC using a pushrod engine based block.

LS17000RPM

You've never been in a built DOHC car then.

germeezy1

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.

ChucksZ06

iTrader: (9)

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.

germeezy1

Yeah the iron block S/C Cobras seem so much less eager to turn in than the N/A cars. Plus the physical size of DOHC heads a Cobra motor is huge in comparison to the LS1.

chuntington101

good one!

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.

A-man930

iTrader: (2)

Yep, I called it So back on topic, is someone coming out with these for LSx motors?

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.

germeezy1

I wasn't going to say anything.....

Sunset'01Z

iTrader: (10)

can you enlighten me on the B head?

and btw, there are a couple lsx's in the 6 sec range with less than 2k hp