cousin_ed

after reading much of the bisimoto turbo cam thread, i noticed that alot of you seem to think the factory manifold is the reason the SOHC hits the "hp wall".

why?

are the runners too long?

the plenum too small?

restrictive?

promote reversion?

this guy made 436whp on a ported stock IM.(race gas)

http://www.homemadeturbo.com/forum/i...topic=100937.0

if you were to fab your own intake manifold, what would be ideal for a z6?

short runners with velocity stacks raised inside a larger plenum with the ports smaller than that on the head and throttlebody to decrease reversion?

what about an idea like this?



using this design on a d-series, you could possibly rout your cold side under the oil pan and up to the TB.

this design looks like it would promote an equal "fill" of all the cylinders but seems as though reversion would be a problem.

i am a big fan of super short piping!!!

what do you guys think?

the intake manifold/ head/ and exhaust manifold are the keys to power. if we can all concentrate on what makes more power on a D, we can help overcome this "wall".

i am currently building a forged z6 with everthing coated you can think of.
bearings crank pistons rods valvetrain etc.

i am shooting for a 400hp reliable setup. the more efficeint my engine is, the less i will have to push it to make that much power. what i am saying is that if you can design a good manifold/head/valvetrain combo, you may noy have to rev as high or run as much boost pressure on a similar setup with a stock or ported stock parts. thus meaning the engine may be safer to operate and may even last longer (that also depends on lots of other factors).

anyone experimented with custom intake manifolds for a D?

chrisdavis6

Very Interesting, bookmarked.