wpgrexx

would it be possible on an NA. to make a custom manifold that would have less bends and rotate the tb around the other way(drivers side). My plan is to shorten the runners and bring the secondary injectors closer to the block. my idea for this is kind of an extension on another idea shown on here a few months back, where he actually relocated the secondaries to where port actuators are. my thinking behind rotating the tb is to straiten out the runners. the stock manifold does like three complete turns, i want to take those turns out and widen the intake passages. i want to raiswe the amount of air coming in. and with an safc it should be able to balance out the desired a/f ratio.



so basically tb to plenum to just one turn down and into the block, so like a u shape attached to the plenum and the secodaries right before the intake opening. the maniflod would look like a carb manifold but just attached to a tb instead

bingoboy

just curious, but where would you put the air flow sensor?

rotarygod

iTrader: (1)

You are referring to my intake manifold (one of them). Easy to build what you want. It will be tuned for more high end power above 4000 or so. Below this, even with the 6 ports still working, you will lose low end power. There is no way to straighten the intake runners out and still keep low end power relatively high. You are shortening them and that tunes for higher up. You will have to cut and extend all of the afm wires to relocate it. Since the computer was not tuned to this setup it will not be tuned perfectly for it however you can get some really good results. It is possible to build a new manifold in either the single or dual plenum configuration (stock) and still have long runner but be straighter than stock. It would be a plenum on the other side of the engine bay facing the drivers side with runners extending directly out the back. This way the runners would only turn 180 degrees instead of the added 90 degree upturn it has now. This setup may not yield any noticable gain for the time and effort involved. Go check out www.sdsefi.com look under the how-to's section at building custom intake manifolds. They have a custom fabbed 2nd gen manifold done exactly like you want it. Theirs has an aftermarket ecu (obviously). That would be the proper way to do it.

banzaitoyota

Intake Manifold link

For the lazy NEWBIES who don't know how to search

Samps

Wonder what kind of numbers that SDS system puts out combined with their EFI? Only problem is they need to use the dizzy.

wpgrexx

thanks for the input guys. `i will keep researching, but the feedback is positive so it seems like maybe worth venturing into during spare time in the winter. cant drive it anyway damn snow!!! thanks for the links too, maybe I can incorporate all the ideas into a good finished product. i WOULDN'T USE STAND ALONE YET SINCE I CANNOT AFFORD IT YET AND IF AND WHEN i CAN A NEw engine (sorry for the caps ) would be the priority, than so on and so on down the never ending list. Instead I would use the safc since i already have one.


I would probably need to make a couple tries at it to find a good lenght of manifold to try and make a little power down low, but its a rotary and with my mods already, low end power is not what I am going to get a lot of. Time to do some reading.

wpgrexx

the sensor would need to be relocated, just move stuff to other side, no big deal some wiring etc, probably a mounting bracket for the afm. my battery is already in the trunk space is no issue.


hey Banzai, r u reffering to me as the newbie that doesn't know how to search?

banzaitoyota

"hey Banzai, r u reffering to me as the newbie that doesn't know how to search?"

Think of it as a pre-emptive strike, As sure as the sun rises; someone will ask where the intake manifold page is again

wpgrexx

yeah, most likely a couple of people will ask. Just checked out that link that rotarygod gave. pretty cool manifold. yes that is pretty much what i had in mind just small differences. i don't like their filter location at all, i will think about it lots and maybe try and draw up my idea and than post it somehow. i would lie to see some outcome of their manifold though, they don't even say how it worked, but they gave great detail for construction. I think i might make my runners a little longer to try and bring some torque down low. Is there any way of figuring it out, like a formula or something, besides just making it and testing, or do I have to get some 30000$ computer design program?

KiyoKix

Very VERY nice design going there (on the Subi EJ that is, I'm not too keen on the FC designed one but hey it works )...even has velocity stacks. I'm kinda surprised at how "easy" it is to make one. If only I had the time right now I'd do it...but I am studying and making sketches for the future. I've always thought about the intake side of the engine just like the exhaust side, and that EJ manifold just added fuel to the fire ...okay I'll take my smiley *** on now. (sry I had to do one more...just seemed like the right way to end the post)

KiyoKix

Hi my name is Mr.N U. Guy and I was wondering if you guys have any info or page links for designing intake manifolds on the FC? Thanks ahead of time...great site!

Rotorific

iTrader: (1)

That actually looked alot like a b18c5 intake manifold design...

KiyoKix

I remember the C5, but don't remember it's design...may the Honda gods strike me down.

Rotorific

iTrader: (1)

Same design as all honda intake manifolds but the C5 has longer intake runners

KiyoKix

That's the only difference??? Damn, I would've thought it had something else different (different angle for the injectors anything).

Liquid Anarchy

iTrader: (2)

Why not just use a TII intake manifold? It seems to be the same shape you want, w/ a lot less work.

KiyoKix

Anarchy has a point, I'm sure it'd be easier. BUT I think if you're going to go through the effort why not try to make something better, if not just fab a TII IM.