Re: Intake Manifold
 

Why is a box plenum better? I don't doubt you, just curious if youhave info on it?

Re: Intake Manifold
 

id assume a box plenum is just a recatngular shapped plenum as opposed to cylindrical shape...

Re: Intake Manifold
 

.

Re: Intake Manifold
 

very nice man

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

Well as few may notice in posts about IM I'm thinking of fabbing my own. In my searches for aluminum velocity stacks I was linked to a post on H-T for Steel IM and I was wonder what peoples thought on a Steel IM would be.
http://www.honda-tech.com/zerothread?id=1369010
I like the idea due to the fact that It would be easier to fanricate myself in my shop, and materials are a little easier to come by.

They had a good instruction page linked too.
http://www.sdsefi.com/techinta.htm

The site above has alot of other good info on fabbing Turbo manifolds and tuning which I'm sure people have found before.

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

Be sure you angle (prefferably curvve) the section for the throttlebody around 33-40* off center. Be sure to give an inch or two of space after the last runner. (Most opposite of the throttlebody) Otherwise distrobution will be uneven.




Build a huge plenum. Best thing you can do. FI loves a huge common area.

AFA the runners, N/A has to have a balance between small diameter promoting high velocity charge speeds, and having large runners that can flow more with less effort. Go to big, or too small & power suffers. Same for head porting.
The runners also should be tuned to length. That way the sound pressure wave will bounce back through the intake & with the right timing(length), you can catch a returning sound pressure wave to shove air into the cylinder.


All of this is completely different when you're shoving air into the engine. The head & intake runners can be grossly enlarged (If you dont' mind loosing power out of boost). having the shortest runners possible also helps.







A lot of times, the easyest thing to do is saw the stock runners off & simply port them very large. Then build your own intake plenum.


Attachment 37564


Spend a couple of weeks griding & polishing, then spend a week with a tig welding the alu together & you wind up with something like...

http://www.thefilehut.com/userfiles/...e/cameng6e.jpg\

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

Wow that is one sexy and Flashy manifold.

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

That IS pretty dang cool. How effective is a new IM or even just cutting, porting, new TB and rewelding the stock back one together? Is it a project worth taking on?


JP

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

On ours, nothing N/A. FI, 15-25bhp so far depending on how much you're shoving in. (So far...)
Keep in mind that's on a Toyota v6. They're ---- retentive about mods. Short of head porting, or a good y-pipe, they take mods, laugh at them then call you a ------- idiot for trying. LoL! Nothing makes power on them. Such a pain in the ass. But it does save money 'cause you don't have to buy/make much LoL!

So that 15-25bhp is really not something people with other engine's can compare against.

Re: Intake Manifold *Revisted With Ideas and Thoughts"
 

wier, i like the built in velocity stacks