Billet Aluminum Carburetor 950 Base Plate Holley, Quick Fuel 4150 Dominator 4500

Anyone here ever use one? How well does it fit the 4500 intake?

After fighting with transfer slot positions and lengths (especially on older dominators) and based on a couple of recommendations from some carb builders, I am using the BLP dual pattern plate. If you are comparing it to other plates pay extra attention to the transfer slot (width, length and position) in relation to the throttle blades-BLP seems to get this right and it will pay some dividends setting up the carb. It is a nice piece, I use it on my Quick Fuel 950 annular main body. I will say that I have never bolted it to one of my 4500 intakes but I could as the carb is already out and I have a M1 4500 under the bench.

Thanks Clovis ...i was not aware that BLP sold theses base plate ,I'll look into BlP's website and see what they have to offer.
P.S ...sense you have that carb all ready off ,is it possible to set it on the 4500 intake and check alignments....Thanks.

I recently bought a BLP billet duel pattern base plate for my 1000 cfm 4150 carb. It is a high quality product. In comparison to the Holley billet plate I am replacing it matches transfer slot location.
I'm going to run this carb on a trick flow 270 head / max wedge size intake with a 4500 flange. It is not assembled yet so i can't comment on how it runs yet but so far so good.

Thanks

It looks like you may need a spacer. This is a low deck M1 4500, so not sure how close all the 4500 intake patterns would be, but for this one you will either need a spacer that is cut back or do a little grinding on the intake.

Thanks for the pictures Clovis i wondering which 4500 series intake they fit? i have an Indy intake, 4150/4500 adapter anyway just trying to keep it as low as possible. It's only 1 /2" difference.

This is an M1 RB intake with 4500 carb pad. The 4150 carb with dual mounting pattern does need a little grind on the sides to clear the levers as others have shown. I used a 1/2" thick plate with cutout/reliefs to clear the carbs 50cc accelerator pumps.

Now, that I think about it, I have an Indy 440-3 on my race engine, so I'll try to snap a few pictures tonight to see what kind of clearance issues are there.

We make an adapter for using a 4150 on a 4500 intake...Basically just to make a transition from the large plenum opening on a 4500 to the smaller 4150 and also adress the accel pump and linkage. I have a Bob Book 4150 that has both patterns in it on the 64.

I have made a few "adapter" spacers forthis kind of swap. They have always worked well.

It seems to work on the 440-3. The intake is cut back a little on sides which give it the clearance it needs to sit flat.

Thanks Clovis for the pictures: up: I run the 400-3 intake, so there shouldn't be a clearance issue. Did you check for full throttle motion for clearance?

Can you do it, yes in any number of ways. There was a time (maybe still is?) where certain class rules outlawed dual pattern baseplates. Just keep that in mind because being able to run your car in many classes is good. The other concern that I'll air is; sell the 4150 and put a 4500 on it.

The 4150 on mine was for some NSS class. But I am done fighting it and will be selling off me Book 4150. Worked ok for my deal but the Braswell 4500 that replaced it was almost .2 quicker on my junk...

Well i looking at using what i have ,also this is for a blow though setup.

Sorry, I didn't check full throttle. The engine is sitting in a corner taped up so I was too lazy to take the tape off the intake. I'll either go down this afternoon or tomorrow for you.

The linkage will clear.

Thanks, Clovis You have been helpful

It doesn’t appear to be available any longer, but Quick Fuel sold a spacer to remedy the fit/interference issues.

https://www.holley.com/products/discontinued_product/parts/300-4145-1ALQFT