gutted upper intake?

[Dave]

I've got this whole image of a dual length intake runner setup going thru my head right now, but I'm probably just crazy for even thinking it... once I get it drawn up, I'll post a picture of it, I'm tryin' to work out the details in my head.

does anyone know how much clearance there is under the hood of that motor, if I saw, wanted to increase the runner length by like 2" or so ... I've got so many strange ideas runnin' thru my head tonight..

--Dave.

[blk92z34getrag]

Not more than a couple inches... maybe enough to increase the length by 2"... how are you gonna increase the length? put spacers?

Killing time till you get this thing started!

[Gemmer]

if you look at a 96, the plenum goes back over the spark plugs, maybe gain an inch or so that way? No too sure, would have to take a look in the bay.

[Dave]

well, I was going to build a spacer with some butterfly's that would lead into an empty chamber, remove the stock TB plate, and put in a sepperate TB plate, and use an electric/vacuum controled motoring setup to change the butterfly's so I can get the dual length runner type setup, then tune on a Dyno to find the optimal x-over point to the shorter runners, this in turn would lengthen the runners because of the spacer, and by slowing bringing in the butterfly's, you can make it almost seem is if the runners are getting shorter as the R's come up. it sounds really complicated, but something I do in-deed want to try.

I still want to try the gutted upper intake idea first.

--Dave.

[RednBlack]

Yeah, I'm back on this subject. Couldn't let it go since no one else did. If 2 TBs were used, would you feed all six with 2, or 3 with 1? And could a smaller TB be used? Cause I got several ideas, and they include runners or empty box and maybe both. Look at an Edelbrock high rise. Longer runners and still an open plenum area. Here's another question, Any possibility of mounting 2 TBs on the stock plenum? Would take some machining and welding. Not too much of a chore. Maybe 2 TBs on a Y type of pre-intake. There are some possibilities here. If I could use 2 on the stock plenum, low end and high end gain. (Just a theory) That damn computer may get in the way though. Not sure if a stock comp. will be able to handle 2. And maybe a compromise on the gutting. Keep 10" and lose 5". I could handle a little low end loss for top end gains. Then there's the injectors. Enough gas for that much air? Now my brain hurts...

[blk92z34getrag]

yeah the pre-intake passage would look like an upside down Y. with the one leg being the TB with a devider type thing seperating the two passages (one leading to each cylinder bank). At least that was my idea.

[Dave]

as far as I understand, we never max out these injectors anyhow. There is some room for improvement, but I'm doing all this on a speed-density car (with I had mas-air)

my idea is so strange, imagine the intake manifold spaced up about 2" and attached to the spacer would be a large open chamber sepperated from the runners by a set of 6 butterfly's, removing the stock TB butterfly, and running a large like 70mm, or 80mm something like that just huge closer to where the airbox would be - then move the IAC, and TPS and such. Have the butterfly's on the secondary chamber open as the RPM's increase to "change" the runner length, untill they are fully open, pulling air from both the lowered open chamber, and the stock length runners. it'd be messy as hell looking untill I can finish it up, but hopefully my idea may work.

--Dave.

[dykz34]

The stock fuel injection system is good for 300hp. Don't worry about that.

[RednBlack]

dykz, you are lovin' this. I know I am! Still wondering if the computer can be modded to handle 2. As long as my car is in the air, hell, I might as well think a little! Too bad the 4T60-E can't handle 300HP.

[dykz34]

The computer will be fine regarding two TBs. You just have to make sure the TPS is correct and then you have to rig up the throttle cables somehow. Hardly seems worth the effort.

[blk92z34getrag]

Have the butterfly's on the secondary chamber open as the RPM's increase to "change" the runner length, untill they are fully open, pulling air from both the lowered open chamber, and the stock length runners. it'd be messy as hell looking untill I can finish it up, but hopefully my idea may work.

How would you design this? Do you even know how?

This sounds like trying to design variable valve timing and cam phasing on a 1985 dodge colt... I don't know how you're gonna do it man. Maybe you should enlighten us as to how you'll achieve your ideas with the butterflies.

[Dave]

well, I was thinking I would use something like custom made individule runner type butterfly/tb's and then welding them onto the spacer, and then inclosing them in the large short chamber? I have the finished unit pictured in my head, but I'm still tryin' to figure out how I'm gonna acheve it. I dunno for sure, I'm playing with ideas on paper, and running them by some of my friends at the machine shop.

--Dave

[Lowerd1]

With it gutted that bad it shouldn't be no different than driveing a S2000!

Seriously people seem to love those cars and they have NO lowend torque, all their power is up top. Who knows you may like it, if you have a 5speed.

Also there is only one way to find out if something really works, so good luck and I guess thanks for being a guinie pig!!!!!!!!!!!!

[Gemmer]

gut it yet?

[Anonymous]

I have always thought of something along these lines. But run the ports back and have the horns face the firewall right above the rear cam cover. We would lose low end, but the high end would be crazy. Something I would love to play with later on. I know it is unrelated to your plans, but anything we can do to this pleanum thingy couldn't hurt. Hell the guy puts a box in place of it and gets 240fwhp.