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Anybody ever tinker with the idea of individual throttle bodies?

I got way sidetracked on youtube and came across some videos of some v-dubs that made me think. These guys had some Weber DCOE 45's on their little 2.0L and they made pretty good power, and a lovely noise.

I thought about doing that to my EJ22 since there's no more emissions testing here in MA on vehicles 1995 and older.

Possibly a cross-ram type manifold design or simply straight up with velocity stacks like the old beetles.


Anyone seen this done? I may do it either with Weber's or some Motorcycle carbs if I can find a good set.


-Kurt

There's certainly emissions on cars older than that. My 1990 got tested last time it went in only about 3 years ago. I thought it ended at 15 years old (and my car was on the line), but I've heard conflicting answers about that. But if it is true, you'd be good to 1993.

Aside from that, I doubt carbs would beat the MPFI except for maybe a certain rpm range and throttle response (and I agree it would look damn cool). However, if you're talking fuel injection with individual throttle bodies, you could probably get some better high rpm performance. It all depends on how you'd tune the trumpets and program it, but I think your best bet would be short stacks for higher rpm capability. The question would be if it would be worth the money.

The emissions laws are changing. I apologize, I thought they already changed, but as of October 1, 2008 all OBD-I vehicles are exempt from the emissions test. No more dyno, no more rev-test for AWD vehicles. The only Mass state inspection they must undergo is a safety inspection. OBD-II vehicles simply get plugged in and the car will tell the computer if everything's OK. The only emissions-related test that pre-95 cars must pass is an opacity test
Here's the site: http://www.mass.gov/rmv/inspections/index.htm#top

back to the subject at hand...
For simplicity's sake, I would like to go with the Webers.
The point of the project is to do it fairly cheap and be unique in the final outcome. A couple extra horsies wouldn't bother me, either...
Going with carbs, however expensive, seems to be the cheapest option, considering I'd have to go with some type of engine management to convert to speed density and buy injectors and so forth.

keep in mind your fuel pressure would be too high for a weber, i would run 10psi max, instead of the 30psi you have now. You can install a regulator but i wouldn't recommend it since your fuel pump may cease at an early age. To do it complete i would drop the pump out of the hangar, extend the pickup, and mount a pull style in line fuel pump lower than the tank. Keep in mind that multi port fuel injection will always make more power and have better economy than throttle body injection and carburetion.

I thought of ITBS for a Subaru as WRX TGVs can be converted to ITBs complete with injector bosses super cheap & bolt right onto Phase II MAP cars.

The other issue would be an ignition system, if the computer doesn't have all the right inputs (TPS, IAC, MAF, MAP) it should drop to limp home mode and retard timing...

this is kind of funny that two people would think of ITB at about the same time. i was looking thru my import mags and came across an Acura with it and thought well since im not doing a turbo mybe i should try this. maybe we can be the first two guys on here to do it and get the N/As some reputation

I'd still do it if I could find some cheap webers or find an easy way to convert to MAP using TGV'd intake mani. It'd be fun, i think...

and it would be cool as hell

Looks like I should step in here, especially for requirements for running CARBS.

1. Since are ignition systems are different from distributor types, then an electronically controlled and trigged type would be necessary.

2. Custom Intake manifold for either a single or dual carb setup is necessary, for either the WEBER DCOE for a single which can be inclined to 30 degrees IIRC. Or use of WEBER IDF. I'd go no bigger then the 44 or 45s in either.

3. I proper fuel pump can take car of the fuel, it's a high volumn low pressure pump you need, no more then 4 psi.

4. Tuning can be a pain, which you need to take into account displacement, what kind of Cam and where it will be making power for rejetting them.

Trust me it's not worth the hassel in doing it in our engines, since our engines are distributor-less.

Also they are not very cheap, a set brand new goes for nearly 8-900 dollars, and you still need a manifold and throttle setup.

I'd get a couple TB's off something else that has a dual plate TB. or get like 4 geo metro TB's lol. cut up a manifold and weld on some flanges. or you could get some bike ITB's. there are a few v twin bikes that you could take a set for either side or just try and split apart a set from a 4 banger.

It is very easy to hook a distributor to a ej22. An older type ford escort disty will bolt in with very little customization to the flange I beleive. You bolt it to the cam slot behind the engine in the head. There is a plate there blocking it right now.

I know of a few vw guys running dual weber ej22 set ups around 160-170 horse. And if you run with a ej25 you can break 200 N/A.

If you really wanted an improvement, and wanted ITB's, it isn't difficult, just time consuming and probably not super cheap. Ideally you would want a throttle body and o2 sensor (wide band would be ideal) on each cylinder and a custom manifold. Possibly a megasquirt to control it (can a megasquirt handle four independent inputs?). That setup would get you ideal mixture in each cylinder which should get you the best possible performance. Possible, but a lot of work.

If someone does this, please do it with standoff injectors.

Example: http://www.youtube.com/watch?v=GsKNbsDq ... re=related