Thread: Custom Intake Manifold Pics!!!!

^^ sent you a PM

Yeah if it was flat and smooth on the inside I'd be down one.

i dont see any links or pics of the sr20 bj's manifold

^^
Bj's mani

http://www.sr20-forum.com/general-sr20/22251-fwd-intake-manifolds.html

It's on the other website, think under new members.

what do you mean by flat and smooth on inside are you refering to the velocity stacks not being flush with the plenum? if so that isnt uncommom for the velocity stacks so not be 100% flush with the plenum or patrude out of the plenum itsself on the inside. just look at the full face intake manifold, or magnus, some of their have the same design.http://www.magnusmotorsports.com/images/velocity_stacks.jpg

as far as the runner length personally i would have gone with a big of a longer runner length to mimic some of the higher end intake manifolds, such as the full race design Full race intake manifold image by ciscoscivic on Photobucket

or the AIR design http://www.advancedinductionresearch.com/_borders/200351694759_AIR1.jpg

the majority of intake manifolds that are turbo specific have longer length runners

given that this guy is making them pretty much on the fly, this gives you the ability to have the manifold custom made to spec, so you can mimic other intake manifolds and take the good from them and incorperate it into this manifold

personally i would like to see the short length runner and longer length runner and a dyno shet for both to gives ppl a better perspective of runner lengths.

you would see alot more smooth flow if this manifolds ports and runners were ported and smoothed out.i dont think its a bad manifold but just room for improvment, but again, price is a good thing with this. much cheaper than bj's 950.00 although his is quality, still this could deliver the same results

Since the stacks come out into the plenum, the guy i was talking to that makes these said that they come out 2-3cm. So the runner length is that much longer than what you see there. Not like it matters much IMO.

yeah true, to me the runner length is important, its definitly something to take into consideration with your overall engine build, shorter runner lengths are going to build power in the lower rpm but run out of gains at around peak power. while the longer runner lengths are going to see small gains down lowe but sustain higher peak power up top.

now what does that mean, well the differences in the way the intake manifolds is going to make power persay you are running a sr20det with a gt28rs on it, the turbo application is going to be really responsive down low, so a shorter runner length isnt going to be that needed beucase the turbo is filling the powerband gap that so the intake manifold wouldnt be efficent for that type of application while a longer runner lengths would be better picking up gains mid range and up top where it would be needed.

now say you have a sr20det with a gt3582r on it shorter runner lengths to pick up low to mid range power would be efficent and top of at peak power, so shorter runner lengths on a larger turbo to fill in the gap of power would be most efficent.

so runner lengths matter alot when it comes down to it, the way the manifold makes power is going to be dependent upon the overall application build.

yeah im definetly gonna take a look inside the runners when i get them and do some port work if necessary to smooth out where the weld to the stock runner is and the ports to the head. Ill take some pics before and after when i get it.

Pushing the stacks out inside the manifold helps to keep runner lengths longer and keep the manifold short enough to fit between the firewall and the motor.

Dudeman