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OER carburettor vs. Weber

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Tabcon

Tabcon

Jedi Warrior
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I just recently learned of the Japanese version of the Weber side draft made by the OER Corporation. I was looking into different carb set up's and was considering the Mikuni's or the Weber's, but I wanted polished bodies on the carbs. You can't polish a Weber because the body is basically pot metal whereas the Mikuni is aluminum bodies and is offered in a polished version. Weber did offer the 45DCOE in a chromed version but recently quit making them due to problems. I really didn't want chromed carbs anyway. Not that I have to have polished carbs as I'm more concerned with performance, but I've been hearing some great stuff about the Mikuni set up.

The OER side draft is a carry over of the old SK carb and the Mikuni side draft, very popular with the Nissan "Z" crowd. The are slightly more money than the Weber and offer a few features the Weber doesn't.

Still undecided on a system yet, but it will have to bolt to the Weber Cannon manifolds I just had ported and both the Mikuni and OER's are direct bolt on's.

Has anyone had any experience with either the Mikuni's or OER's?


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Tab,
what ever you do, you will need all kinds of jets and tuning parts whichever you go with. If you do not know about these types of carbs and plan to get an expert to tune them, then it is best to use what your expert is familiar with and has parts for.
I believe the mikuni carbs are excellent but you need to look into tuning parts available and what they cost. Mikuni make excellent motorcycle carbs.

Some carbs are better than others for the street vs racing. Racing is not as concerned about low(er) rpm operation and tuning, than ultimate hp at high revs.
I believe the mikuni's are more of a racing only type carb.

You may want to consider a set of dellorto's since you seem to be more concerned about street driving rather than racing. The dellorto's are reported to be the best carb of this type for the street due to the multi levels of tuning throughout the rev range. Unfortunately, they mostly can only be found in england at a high price and the parts are expensive (but available). You need to find the non-emmisions type. David Vizard considers these the best side drafts and can be almost as good as fuel injection.

I don't care about how they look as long as they work well. Getting these(dual side draft) types of carbs to work well CAN be a nightmare if you don't know what you are doing. You WILL need a book on tuning the type of carb you get if you plan to do it yourself, and you will need to do it yourself unless you drive in the exact same conditions every day-same temperature,humidity,elevation, etc.
You won't care what they look like if the car runs like cr#p.

Vintage racing may not allow newer carbs that were not available at the time your car was made, which may be why you only see webers on older vintage racing cars (it's not because they are better)

Good luck
Rob
 
I have a set of Mikunis I got from PRI and I ended up taking them off because I couldnt get any help from the seller in dialing them in, he never returned my calls and he kept telling me he was getting some new jets from Japan but they never appeared, his so called life time of service kind of disappeared once he got paid. So I got webers, If you want a triple set of mikunis and manifolds pm me and you can give it a whirl. I even had longer shafts made for them so I could trash the crap cable setup

Hondo
 
Ah, now i see Tab, webercarbs.com/redline caries these and they use weber jets. Interesting. Don't know that they would be any good on the street though. I would want some feedback from someone who has used them.
Tuning these types of carbs is NOT just a matter of main jets and accelerator pumps, especially with tr4 motors that work mostly in the mid range 3500-5000 rpm where the torque is.
Rob
 
I've had cars with Weber set ups in the past and they can be a challange. But nothing a bucket full of different jets won't fix...lol.

The thing that interests me about the OER's is that they are supposed to be easier to dial in due to a couple of features that Weber's lack, an externally adjustable float level as well as an adjustable accelerator pump. Other than these features, the internals is the same as the Weber side draft.

The Mikuni's interest me for their simplicity and lack of 1,001 different set ups. Hondo, I also talke with Chris at PRI, and from what I've heard, you're right, a bunch of hype and PR with no follow up or service. Just an FYI for you though, there is another shop to deal with on these other than PRI now.

https://www.v-performance.com/products/air_fuel.html

I've traded a couple of emails with John, the owner, and he seems to be the "real deal", so to speak.
 
Tab
well I got my DCOE's dial in pretty well, so I will check the new guy out and if I feel comfortable I might just swap the webers out and try the mikunis again

thanks for the web address


Hondo
 
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