Well I seem to be getting somewhere on this, but of course the news is all bad. I showed the carb to my local speed shop guy and he said that the carb (R84011) was dicontinued years back and was a piece of crap. Apparently they have plastic floats which constantly bobble. He feels that I won't find a spacer to fit this carb and that having one made at a machine shop would be a waste since I won't be happy with the carb anyway graemlins/sad.gif

Does anyone know anything about these carbs and are they that bad??

Has anyone made their own spacer and if so, how, what was it made from? If I could make a spacer, I would like to try the carb and see how it works.

Oh crap!!! graemlins/angry.gif :rolleyes: graemlins/sad.gif

Robb

On the bright side, I am hoping to post a couple pics in the next few days.

If you are looking for a spacer for between your carb and intake just search any performance website for the temp reducing spacers. They are around an inch or 2 thick. I was just looking at one today but my cleaner is already pressed into the hood insulation.

Well, I've actually solved my problem. The reason I was considering making my own spacer was due to the fact I couldn't find one that matched the base of the carb (alum or plastic). I have since decided to use a Mr Gasket carb adapter. It's meant for a square bore carb to a spread bore intake I think, but if I use it upside down, the taper widens out to match my intake. The reason this adapter will work, is that it's almost straight across between the front two mounting holes.

I finally got an answer back from Holley tech support, and model 84011 carbs are 750 cfm square bore with vac secondaries. As I mentioned, these have been discontinued and apparently aren't much of a carb. We'll have to get it running and try it I guess. My speedshop guy says that they have figured out how to make drastic improvments to this carb by using alcohol carb floats to solve the bobbling issue.

Who knows.... wait and see I guess.

Thanks for all your help.
Robb

I used its smaller brother, the 84010 (600cfm) on a 350 for a number of years with little to no problems.

I did however use the nitrofil road racing floats available from 'The Carb Shop' (aka Brad Urbans carb shop). I also milled off the choke horn, installed heli-coils in the body of the carb (because those normall strip out after a while). Lastly I installed a quick change secondary kit.

The nice thing is you have normal jets in it front and rear, its not a 'jet plate' design. So the only thing your dealing with is jets, the secondary spring and an acclerator pump cam for the adjustments. Thats all, nothing else.

I loved the throttle response. The annular boosters work very well on street cars. The best part of using this carb was the 26mpg I got from using it. Its not junk, its just another carb a few people couldnt figure out......typical of people and Holley's. A carb isnt rocket science, its just something you have to learn if you want to learn how to tune an engine......plain and simple.

BTW, the 84011 is a spread bore and it uses the same spread bore spacers as any spread bore Quadra-bog......nothing out of the usual. I would recommend a 1/2" phenolic spread bore spacer. It will insulate the carb from the inductive manifold heat very well and it does slightly increase the plenum volume. I use a four hole on my set-up to improve the booster signal and velocity.

Holley still publishes their "Performance & Tuning" book for the 4010 and 4011 carbs. Its Holley part number 36-164.

Oh yeah, check out 'Trans-adapt' spacers. They make a few that adapt a spread bore to a square flandge pad.

Glad to hear you liked your carb, hopefully mine will work OK. It is a square bore carb though. Honest.
(Holley response)
Hello,
The 84011 is a 4010 model 750 cfm with vacuum secondaries square bore.

Thanks

Shane Whitescarver
Holley Technical
Service Representative

graemlins/waving.gif graemlins/thumbsup.gif
Robb

HA! :D Nice letter...so personal. That's the same guy that responded to mine...I wonder if he's real.
Anyway, I would just stick with that carb, definatley change the floats out. As for a spacer/adapter, I would try HVH (High Velocity Heads), they make a pretty mean spacer. I don't know if they make an adapter, but its worth a shot and the extra coin. Or any of the others stated above are fine.

Never mind me. I transposed the Model and part number like an idiot. graemlins/clonk.gif

Model 4010 is square flandge and the model 4011 is spread bore.

I think the reason I transposed the two is that I read your problem associated with running a spacer and was thrown off. People use to have problems finding them for the spread bore model 4011 and the model 4010 uses the same spacers as any other square bore. graemlins/thumbsup.gif