Author Topic: dual carburated m42? (Read 8391 times)

FL318i · « **on:** November 27, 2007, 06:12:39 PM »

has anyone ever done this? im curious about this subject since im a big carb fan, but im not sure if is worth the effort or even if it could be done
any info on this???:confused:

man, i can picture it on my head already to big weberssticking out on the side off the head less wiring and everything so simple......please somebody wake me up if im really dreaming:rolleyes:

PS: if im not dreaming then im going to execute this!!!!:mad:

jpod999 · « **Reply #1 on:** November 27, 2007, 07:41:32 PM »

Go and buy a 1981 Datsun 210. Do it to that.

strad · « **Reply #2 on:** November 27, 2007, 08:13:04 PM »

Of course it can be done. The question is, should it be done, how much would it cost, and is a late model E30 M42 the right place to execute the idea.

I would say no. I don't know where you live, but where I live the smog guy would take a dim view of dual webers on a 1991 car. Not to mention the fuel injection system works exceedingly well, and is very tunable.

I'd do dual webers on an M10 2002 though. That'd be awsome.

Shocker · « **Reply #3 on:** November 27, 2007, 08:43:07 PM »

I think were going backwards here. Why do you want to put a carburetor on a fuel injected car which are like 10 times more efficient and make more power?

FL318i · « **Reply #4 on:** November 27, 2007, 09:17:37 PM »

i just like the carburetors noise and specially the idle, and im pretty sure that as fas as power goes it will be the same or more maybe, my only problem is that im not to bright with the efi wirings and sensors and crap everywhere so i would like something more simple to tune and i dont care what u say men but caqrburetors are easier to tune all you need is a screw driver but this is only my opinion and of course my personal taste, plus i like the doh carburated idea

Q: how would i go about getting rid of the FI related to the ECU, does the computer completely go, or will it be needed for anything??

PS: disclaimer!!! this is my opinion and i dont mean any offense with whatever i might say.

FL318i · « **Reply #5 on:** November 27, 2007, 09:19:51 PM »

ohhh and im in florida so smog wouldn't be a problem strad, thanks for your opinion man!!

turbo_negro69 · « **Reply #6 on:** November 27, 2007, 09:37:35 PM »

Quote from: jpod999;38462

Go and buy a 1981 Datsun 210. Do it to that.

BWAHAHA!!:D QFT!

+1,000,000,000

FL318i · « **Reply #7 on:** November 27, 2007, 10:08:31 PM »

Quote from: turbo_negro69;38472

BWAHAHA!!:D QFT!

+1,000,000,000

i know.... this is becoming another bf.com, i respect everybodys opinion but maybe should i say tham im particulary looking for positive ones?? and no im not joking, im being serious and after all its still an m42 i dont see anyone cracking on people with ITB's

anyways can we keep this thread focus, if we get enough positive info, i know people here dont like the idea but can chime in with their knowledge;)

2002maniac · « **Reply #8 on:** November 27, 2007, 11:23:50 PM »

I remember seeing a pic of an E36 race car with dual webers. I also have seen a company in europe that makes a ITB kit ($$$$) and their manifold was DCOE based so it could be a bolt on ordeal.

I think this is a great idea for a track car, not so much for a street car(not to mention it would be illegal in most states).

Have seen the prices of new DCOE's? Even used they can be pricy. I sold the setup off my old 2002 for like $1100 a few years ago (45's with all the goodies).

2002maniac · « **Reply #9 on:** November 27, 2007, 11:26:29 PM »

http://www.gttechnic.com/gt2_gt3.html

jpod999 · « **Reply #10 on:** November 27, 2007, 11:36:53 PM »

I was serious dude. You'd get so much more props for doing it to a 210. The carb on the A15 in my 210 is so small, dual webers would probably give it some more power, but it would also probably make it run super rich. lol

FL318i · « **Reply #11 on:** November 28, 2007, 06:05:23 AM »

part of the fun is to do it on a car that will be unusual when completed plus if i liked 510 as much as i like my bimmer i would own one instead, but i just tough it will be fun project

Q: how would i go about getting rid of the FI related to the ECU, does the computer completely go, or will it be needed for anything??

tim_s · « **Reply #12 on:** November 28, 2007, 07:29:07 AM »

I think this is a cool idea as long as it's not used daily, else carbs are a bit too heavy on gas. Can easily be done, can get DCOE manifolds for the m42 quite cheaply, then just need a set of carbs. You can leave motronic doing the sparks even if you run no TPS and no AFM, although it won't be perfect. ideally you'd want megasquirt or something to do the sparks.

D. Clay · « **Reply #13 on:** November 28, 2007, 10:28:00 AM »

Carburetors are best at a very narrow RPM Range. That's the main reason a 50 pound penalty weight penalty never got any attention in a lot of racing classes (like IMSA/TranAM and NASCAR) using small block Chevy's. The smaller the engine and wider the power band the more carbs lose to FI. I'm old school so FI to me is fuel injection and not forced induction. V8's as mentioned above were tuned for 6500-8000 RPM.

1991 E30 M42 · « **Reply #14 on:** November 28, 2007, 10:46:13 AM »

Tim hit the nail on the head. With the M42 using a distributor less ignition system you would need something to control the Ignition system, like an MS system, you would also need to put in a different fuel pump.