Pictures of Custom Intake manifold ideas

[Ondonti]

Hey, here are some pictures I took looking at my possibilities for the new intake.

The first would sit as close to the distributor (shortest runners that will fit) as I can fit. 5" diameter tube (probably requires massive hood modifications).





My other option, and one which I like better because it would create a simpler Engine bay and would mean the manifold would not get in the way of the front valve cover.....
Go with REALLY short intake runners (like a big block Ram intake).

I would cut the runners down till they were still sticking straight up, then put the manifold on top of that. This would mean it would be impossible to use the stock bosses that bolt the upper manifold to the lower manifold, so what I would do is cut down the bosses till there is about 1/3" left. That should leave me room to use Studs and a nut on top that fits between the intake flange and the plenum. A wratcheting wrench would make this plenum easy to remove.

here are pictures where I marked the upper plenum on the bosses with "whie out" to show where I would cut down the plenum bosses for bolt it down.

This design would kill a lot of low end power, but I realy like the idea since Im not interested in low rpm power in this car.

I could raise the plenum a little bit with some sort of velocity stacks but they are very expensive, and I have NO IDEA how you would attach them and then weld on the plenum since its not a "box" plenum.
The plenum would sit a little lower then it does in these pictures.

[m90daytona]

where are that lower and upper plenum from?

[Ondonti]

They are from a montero. It requires no modification to fit with the Thermostat on the passenger side. Remember with the way I have it set up, it leans over the front valve cover unless I end up cutting it all off.

I think this will open up a LOT of power from what I have seen on the australian boards. Plus it will give me an excuse to try to build a direct alky setup in the runners and even get away with a small wet shot of nitrous before the throttlebody (50-100shot). With this intake I would not be so scared of distribution problems

[roguetrip]

that dang pipe is too big, you shouldn't use anything over 3" pipe and i'd think your better bet is to run a short runner setup. I was thinking of just finding a way to custom make the 3" tube run lenth wise right over the lower manifold maybe 2" above it and weld some smaller tubes to the side of the 3" that feed to the lower intake holes, and you could angle them for more velocity impact when boosting.

I want to know what the lower runner is off of :)

[Ondonti]

that is all from montero. I have cut and hacked it up with hammers and grinders.

5" pipe is not too big for what I want to do. . I am going for a large plenum. You wont see a super high HP turbo car with custom intake that doesnt have a giant plenum.

I was shooting for soemthing between 80-130% of engine capacity when it came to plenum size. Proper air mixture is very important for me so this will help a lot. Looke like I got about 125% of 3.14L

I do think the short intake would also help because the air would have a straight shot to the intake valve rather then going around any nasty bends.

[Reaper1]

I agree with what he's doing. I too aim for about 100% of engine capacity as far as plenum displacement goes. My idea was to use the bottom portion of the Mitsu intake(I suppose it is similar in design to this one) with a huge plenum on top of those short little runners....

I say go for it!

[Ondonti]

I realy was not liking the longer runner with the huge plenum over the intake manifold. This idea made me a lot more happy, and will make my engine bay sexier + easier to work on.

[roguetrip]

Well, even at 5" short runner setup should just clear the hood, this would also clear up the valve cover issue. Now for the fuel rails you probably weld some brackets to the 5" pipe and just use that to bolt the rails down

[Ondonti]

The lower manifold has some bosses on it that I an probably use to hold the rails down if I modify them. There are 2 of them on each side and they stick out the side of the runners.

I think it would look awesome to open the hood and see that intake manifold right in the middle.

[Reaper1]

I had an interesting idea that used the Chrysler lower, a 3" pipe on top of each bank of runners with either dual t-bodies or a Y'd T-body manifold with a curved balance tube at the back. The dicplacement of each tube would have been 1.5L(length would have been modded to achieve this) with air horns on the inside on top of each runner(the runners possibly shortened to get rid of the last little turn they make for a straighter shot to the port.

The other idea I've been trying to get right is a center-feed plenum where the T-body would be able to feed the whole plenum equally....but this has proved to be a challenge...at least to me...

[Ondonti]

bah, everyone wants to copy my twin log idea I posted on the 3.0 list a year ago. ;)

[Boogieman142]

I will be building a custom intake but it will have a m90 on top of it.

[Reaper1]

Man, you better keep digging! I came up with that idea back in 2001 or so IIRC...

I've had a LOT of cool ideas that'd be neat to try...just no time, money, or resources to do it...so I'm stuck to drawings on napkins and crap...:(

I'd have one hell of a sweet single turbo set-up by now if I had the 3 above mentioned things!

[Ondonti]

Your mother came up with that idea.

[irocelectric93]

Reaper your tona is pretty sweet as it is keep that in mind...it does or did run 12s. Brent...no need for your mom stuff.