Intake Manifold *Revisted With Ideas and Thoughts"
Thread Starter
3.0 BAR
Joined: Sep 2003
Posts: 3,751
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.
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.
3.0 BAR
Joined: May 2005
Posts: 1,811
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.
Spend a couple of weeks griding & polishing, then spend a week with a tig welding the alu together & you wind up with something like...
\
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.
Spend a couple of weeks griding & polishing, then spend a week with a tig welding the alu together & you wind up with something like...
\
3.0 BAR
Joined: Mar 2005
Posts: 3,161
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
JP
3.0 BAR
Joined: May 2005
Posts: 1,811
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 ***. 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.
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 ***. 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.
