i was thinking of getting one for my 88 N/A FC but i want to know the ups and downs for it. How hard are they to install and what modifications to the car do i need to make to get it to work? I heard i gotta regulate the fuel pump and a couple of other things needs to be done.

 

If you like smelling like gas and hate turning left, it's the carb for you. Otherwise, steer clear. My .02 The Weber 48 IDA is the carb you want. Hands-down.

A low pressure Malpassi regulator will bring your EFI fuel pump down to carb-usable level. Make sure you run the return line.

 

Do you have a reason for saying that stuff? Got a website for the other carb you recommended?

 

His reason is ignorance.

Installing jet extensions (cheap) solves the gas problem. You will need to install a distributer from a first gen. Get an FPR that can take down the fuel pressure to 6-7psi. Run a search and you will find all the info you need.

 

My Holley runs just fine. I like it more than my old 48mm weber. Its more drivable.

 

I dislike my holley and don't recomend them.

Racing beat can not make vacume secondairys work on a six port for some reason, so they recalled mine and sent me a double pumper with two fuel inlets, for which you can't use the holley fuel rail to feed because if hits the water pump and interfears with the omp linkage. That was just my first gripe upon it's arival. Even with center hung floats they will still starve on hard lefts. In my expariance they are not as easy to tune as a weber style two barell. They are also big and bulky and have tons of linkage by comparison. RB also refuses to set them up properly for ported six port motors (because they don't believe in porting said motors)

They do offer good low end/streight line performance, smooth cruising, and the ability to run nitrous plates and camden superchargers.

Maybe see if you can drive a car with a holley before you buy one. Personally, I wish I'd gone with a weber.

 

So, MWatson...I feel that using a Holley for over 2 years, modifiying the standard racing beat set-up with center hungs, different fuel pumps, eliminating the Holley fuel circuit all together and using weber power plates, gives me more than enough trial and error experience with this carb and KNOW it is not the way to go with rotaries. Going straight with shitloads of NOS is one thing, using a holley on a daily driver caused me way too many headaches, and not just from the fuel vapors pouring into the car. So...shut the **** up.

Anyway. the Weber carbs, either DOCE or IDA (DOCE's are a bit more streetable but not as much fun!) 48mm would be your best be for either carb. Robert at Rotary Shack does wonders with DOCE's. Finding a 48 IDA is pretty easy, bugs use them, all that is needed is a change of chokes, emulsion tubes, jets, to run on the rotary. Racing Beat and Mazdatrix have manifolds. Still recommend the Malpassi regulator for your FPR.

 

alex-7, just make the secondaries work mechanically. i know mine's not 6 port, but that's what i did and i'm sure other's have done it too.

 

Buy an Edelbrock Mechanical Secondary Carb. Problems solved. Truth be told, its a holley style weber. Oxymoron? Nope. Works like a weber, setup like a holley.

Only problem is that you will need to raise it 1.5 inches off the manifold as its throttle linkage will interfere with the waterpump housing. Only solution I found otherwise was to install an FD water pump. Awful lot for a basic carby setup.

I recommend Holley. You can get one alot cheaper than a weber.

You will need, other than the carb and manifold:

Return style regulator.
81-85 Distributor AND Ignitors. 1980 Dizzy makes things easier if you can find one.
12A Throttle Cable. 13B is long enough if you stretch it but not recommended. You would need a REALLY stong return spring to idle.


You will need to wire the fuel pump to a fuel cut switch and run a constant power wire to it. The EFI Pump ONLY works when the engine is running and its receiving a signal from the computer. It will not function otherwise.

You will need to run Premix or engineer your own OMP system. If you abandon the OMP setup, make sure to remove the oil injectors in the housings and plug the holes.

Vaccuum secondaries on a holley will open and operate properly if you use a 1 inch open spacer and a light diaphram spring. Problem with this is that low end suffers.


I have done this 100 times and Im intimately familiar with setup and tear down doing this setup.

 

Just because YOU couldn't figure it out, definitely does not mean it doesn't work. I've been working with holleys on rotaries for about 6 years now (which by no stretch of the imagination is an eternity), and have personally owned and driven 4 separate rotary/holley setups (12a/13b NA/blow through). I have worked on tons of rotaries and v8's with holleys. Jet extensions on both the primaries and secondaris completely cures the hard turn fuel starvation problem.

Your fuel vapor problem could have been caused by something else. I also do not have that problem, so it may have been specific to your setup.

Webers are awesome carbs too.

I will now "shut the **** up"

-Marques

 

That's what I did with my old vac sec. carb. Untill they recalled it and sent me a double pumper. It ran better with the old carb and a screw jammed in the linkage.

 

I have an 85 12a bone stock with a 600 cfm plain stock v-8 holley and it runs great except for it loads up a little when it gets very cold outside. I was told that you had to use a rb holley for a rotary. I have a dual solex side draft set up for a 12a if anyone is interested. I ran great on a ported motor. The only side affect is it sux gas.

 

As far as I can tell, they only mod them to acomodate an OMP.

Premix and run any carb you want.

 

Thats what I did. I picked up a new Holley 650CFM Vac Sec. Carb for like $200 Shiney New. That was a good deal.

 

Me and half the rotary world who KNOW how they run on rotaries...which is not all that great even when running ****....get fed up with trying to get them to run right. I can basically tune the IDA and leave it for most applications I need the car for.

BTW...you were working on rotaries w/ holleys at 14 years of age? Cool...not many 14 year olds I know know much more than girls and XBox!

 

Yes, I was working on them when I was 14. I bought my first and second cars when I was 14.

Xbox was not out yet

 

Yep, it's what I did, and it works perfectly. Keep in mind I am running my Holley on a stock port 12a but I love it. It always starts and is very drivable.

 

Yeah, I'm running a holley on a streeport 13b, and it runs fine. It starts up good, but I need bigger jets because I'm running lean... otherwise, I'm happy with it

 

i'm running a Holley on a streetport 13B and it doesn't run perfect quite yet, but it definitely has hustle. i'm running a little rich throughout the powerband, but i'm going to try a spacer as soon as i can.

i think many people make one of 2 major mistakes when it comes to Holleys and rotaries. they either try to run off-the-shelf (V8-application) carbs or they get too greedy and run much more than their application warrants.

 

that sounds vaguely familiar.

 

I am just finishing up installing an 88 NA engine with the Racing Beat Holley in my project FC. Several have mentioned using the jet extensions for primary and secondaries. Exactly what are these and where can you get them? Can they be machined if one has a lathe? Are they generic or do I need specific ones for each size jet? By the way - my son has a ported 13b in his gen 1 and the RB Holley is perfectly jetted. A good combination of streetability and performance. He loves it.

 

You must get a jet extension/notched float kit. No machining necessary, they simply place the oraphace of the jet in the center of the float bowl. Go to Jegs.com or summitracing.com, they have jet extension kits for 19.88 (you will need two pri/sec). The part number is HLY-116-10.

-Marques

 

Great - thanks! That should cure any hard cornering starvation.

 

Wow theres alot of info on this post... I have an sa with a holly on it. My only grief is that when its super cold (and raining) and when its really hot and i stop for gas I have an extremely hard time starting the car. I know shes running very rich as i can smell it in the cab lol. Any suggestions?