Well, I Am Going To Add Triple Webers To My 3.0L M20…

[E30-TourZing]

Hello Gang!

Its been awhile since I posted. I finished my 3.0L M20 a few years back. The motor has been swell, but my standalone experience has been less than appealing. Exactly what I was hoping would not be the case.

2- year ago I ended up building an entirely new wiring harness from scratch (took roughly 42 hours to complete) and its causing some issues for me now. I recently left my career restoring cars full time and now have a job in a different industry that gives me zero time to spend time working on problem solving my Touring.

My plan with getting MS2 setup is to run ITB's. Based on my issues with electronics, and the fact I need outside assistance, I am looking to simplify my drivetrain while still having the sweet, sweet power and noise of ITB's. My original concept was to do side draft Webers before I was coached into a standalone, so this is my current direction.

I have done some research and based on my motor, DCOE 45mm Webers will be the best for the application. There is a mounting plate which is CNC'd and needs to be modified to host 45mm carbs, but the oil tube is clearly different and there isnt much documentation or opinions on this setup.

Here is the link to the plate - https://www.ebay.ca/itm/361433574358

I spoke with Webco in UK and Pierce Manifolds directly and neither one of them has any added value on the product. This add on is quite expensive to my motor and I want to be a sure as I can about where I am spending my money.

Does anyone have experience with this setup on an M20/E30? Because the profile is smaller, does it help clear the booster now? Are their any photos of the oil tube setup?

Thank you for all the countless times you guys have saved my bacon in the past!

(Photos are of my current setup)

[2mAn]

EFI is always going to be better. You're looking at an easy $2k for the manifold and 3 weber 45s and that money can be given to an expert to sort of your issues

[E30-TourZing]

EFI is always going to be better. You're looking at an easy $2k for the manifold and 3 weber 45s and that money can be given to an expert to sort of your issues

I appreciate your response 2mAn. For sure there is a solution available to keep EFI, but keep in mind this would also want to add ITB's after, so it would likely cost more to go this route. Carbs certainly are not going to be the best case scenario for effectiveness, but it is what I am leaning towards for a few reasons.
- Mechanically speaking, I built the car myself and I would like to continue that path. With carbs I feel pretty available to working on them once tuned. I spend time around vintage 911's often and it amazes me how little they need once dialed in. Year after year with little use of the car or cleaning, they start up after months sitting and two pumps of the throttle before turning the key. They also perform really well under all load conditions.

- They look and sound the business. I am into something unique as long as it functions. I really do not drive my touring often, and when I do I am about utilizing all it has to safely offer me on the street. (driven hard-put away clean)

- I have some carb wizards in my corner who offer great advise and assistance when it comes to these things. Less so with EFI tuning. My good friend who spawned my MS setup no longer lives in the same province and he is a new father which means its difficult to bug him when questions arise.

My hope is the oil tube from the head can safely lead to the block with this plate and that the booster can still be used (even if its a 944/E21 booster)

Can anyone chime in on this product and give there two-cents?

Thank you!

[digger]

Brake booster clearance is largely determined by the angle of the manifold off the head and the total runner length as well as booster being used and if it has been moved.

With Webers you want the runner to follow the port centreline and then start to bend over so the actual Weber sit close to horizontal (for functional reasons) and as this would somewhat optimize booster clearance.


Skifree developed a setup for 2002, not sure how this translate to the e30. The e90 type booster improves things slightly plus its a better setup than the stock e30 booster

https://www.flickr.com/photos/152898763@N04/albums/72157688980425565/

with fuel injection there is much more flexibility in the design

[McGyver]

What's the cost to ditch MS and go with a professional setup like Haltec? I don't know what it's like for a general consumer, but they seem pretty responsive to Mighty Car Mods. Being a major brand, you're likely to find more support for install and tuning.

[82eye]

what would you need a standalone for? on carbs the only thing it could do is time spark, everything else becomes irrelevant. the stock ecu should probably be able to handle spark. if you are running standalone i'd go straight to itbs, once you've tried setting up, tuning, and syncing triple webers you'll be more than ready to embrace itbs and digital tuning instead.

edit: try a couple e21 forums. that's where m20's and triple webers will be found and probably have more relevant info.