OER Carbs for Datsun 510, with L20b. vs. Mikuni.

[510SSS]

Hi, I was wondering if anyone has any further information about utilizing an OER/SK racing 40/45mm carb setup for a modified L20b. Does it require a specific manifold, can any weber or mikuni manifold be used? Do velocity stacks adapt to work with OER carbs. Does anyone have any experience with tuning these carbs, did you have trouble getting them jetted properly?

 

Would a simpler dual Mikuni 40/44 setup be preferable in terms of ease of installation/tuning? When using Mikuni carbs, will they fit with a dual master cylinder in place? Which is the best Manifold for Mikunis; Harada, Cannon, Datsun Comp?

 

-Thank You-

[RandyWanger]

I've got a set of OER 45mm carbs on the Kameari L4 intake manifold (L18 but a 2L one)

 

 

I ordered it as a set, new from Kameari Engine Works in Japan, fast delivery and not too bad price wise shipped to Europe with VAT and DUTY added.

 

The OER is a copy of the Weber, so any manifold suited for that will work with the OER, getting jets will be easy too as the Weber ones will fit.

As for tuning, I've not got that far yet as my engine is still in bits.

['70dime]

A few links to help you with your quest for knowledge. I got a SK setup also, cant wait to get them running.

 

http://www.racetep.com/tepoer.html

 

http://www.zccjdm.com/catalog.php/azcarbum/ct27192/O.E.R._AKA__SK__DCOE_CARBURETORS

 

http://www.zccjdm.com/catalog.php/azcarbum/dt84283/pd1938012/A_OER__SK__RACE__DCOE__CARBURETORS_

[shacks510]

Any L series DCOE manifold will work. The Mikuni manifold, although difficult to find, is the best one to use because it is short, which allows more clearance for velocity stacks and air filters. All other manifolds are longer, and after putting the carbs on with air filters, you'll run into issues with hitting the brake master cylinder. I've seen people using Canon manifolds with the nipple cut off the brake master bleed screw because they were that close, and that was with short air filters. With your dual master setup you'll probably still run into clearance issues even with a Mikuni manifold. Mikuni manifold also has risers for a throttle linkage, of that's what you choose to use. Most like the center pull because it's easier to deal with, but I haven't had problems with the linkage.

[Doctor510]

They more closely resemble the Mikuni than the Weber, they are a really good carb.  Check the carb/manifold joint for vacuum leaks.

[oldskoolvws]

The SK OER carbs were meant to be a fine line between Weber and Mikuni. It was supposed to be the best of both worlds. Less finicky, long term tuning, great power, easy adjustments. I have a few sets.

[Stoffregen Motorsports]

The Nissan Comp manifold makes the best power, but it is hard to fit. When I install those on a 510, I relocate the master cylinder reservoir with a kit from AP/Tilton, actually you can get them from Wilwood.

 

And I would also look for soft mountsnd centerpull linkage.  Best two mods to dual carbs that I can think of.

 

Two pics below show different manifolds. They both have soft mounts and centerpull linkage. The first pic has a Nissan Comp maniflod and th master reservoir relocated. The second pic shows a Mikuni manifold.

 

 

[banzai510(hainz)]

the nismo manifold i put the put the back funnel on the disc sander. to shorten it to prevent from hitting the master cylinder.

They used to sell a single resivoir model for this I think. I had one but sold it.

 

Im sure the back funnel is air impeded but mine works good enough for a 1960s tech motor

[Stoffregen Motorsports]

Yeah, I also put a small notch in the rear air horn to clear the master.

 

I would never use the single master to get this intake to fit. That's taking the car back to 1950's technology.

[worksnaDELUXE]

I have OER but my car is not running yet. I'll let you know how they are, if it ever gets running.