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Thank you. I think I will be ok though. I have a junk old 750 vac secondary carb in the garage and I measured the primary butterflies. They are the same size. I can install them out of it if I need. Thank you for the offer though. Ironically I was looking at an old 600 vac secondary...

Well I may have found the main issue with the idle mixture screw issue on the carburetor. It seems fairly obvious now. It had the incorrect base to main body gaskets and it was blocking flow from the main airhorn to the ports on the base plate. Here is a picture of the base gasket next to...

Yes. I put one on as I was at the parts store buying gaskets anyway and there was some intake clearance issues.

I meant MY Eddy on this engine has no drivability problems. It starts on first crank. Has a nice lope from the cam. No hesitation weather I stand on the gas or slowly apply throttle. Runs smooth up until I shift gears. I was not saying all The Eddys have no drivability problems. I also...

I have no problem tuning a carburetor. I have no problem learning what I don’t know. I am still not sure if there is something wrong with this carburetor that has nothing to do with the normal idiosyncrasies of this model of carb.

I appreciate everyone’s input. The point of going to this carb was not to start an Eddy vs Holley debate. I wanted to go to this carb because I need more cfm for my engine package. The 600 Eddy was just an old carb I had sitting on the shelf. I believe their is slightly more power potential...

This is the carb number I took the picture the other day while I was going through it. The price of the carb, if I decide to keep it is $100.

Even if I do not keep this carburetor, I will be going to an 800 or 850 cfm carb. That was part of the plan since the build started.

I had heard that about using a dial back on MSD. I don’t have an MSD on this car so I should be ok.

Thanks for the advice guys. I was trying to get the timing at different rpms last night and my timing light started acting stupid. I have a Mac tools digital dial back to 0 timing light. I set rpm at 2500 rpm and 33 advanced as I did before. I went to bump the throttle to 3000 and the timing...

Unfortunately I do have a true measured 11.5 to 1. I guess I should have specified that the flat part of the piston was at zero. There is a substantial dome on the piston with a notch for the spark plug.

I am still working on it. I do appreciate the advice. I did follow your advice from those posts. I was unable to get it to run though. After I slightly opened the secondaries I was able to idle it down. That being said even with the primary throttle plates completely closed I still have...

I said 7 to 8 inches

Ok update on the carburetor. I went through the Holley again and didn’t really find anything off. Main jets are 70 in the front and 85 in the back. Power valve is a 6.5. I installed a 1 inch carb spacer for 3 reasons 1 I wanted to experiment with more plenum volume, 2 I needed to gain some...

Ok update. I Technically it is a street car I suppose. It gets driven occasionally around my small town and to the Friday night cruise which basically turns into a burnout festival. It really wants to be a track car though if that makes sense. It it does have a true 11.5 to 1. Zero deck...

You may be correct. If there is a leak it is internal in carburetor. I am going to go through the carburetor to make sure everything is ok and nothing obvious was messed up.

Timing on this distributor is all in by 2000. After experimenting with this carb the other day, the Edelbrock was put back on and it went back to running smooth. I am a little limited on what I can run on total advance because of high compression ratio and pump gas. I run av gas or an av...

Maybe I need to try and describe the Symptom a little better or at least with more detail. When I initially installed the carburetor, it would not idle at all. I could keep it running by holding the throttle open. Using the idle speed screw I turned it in until I was able to release the...

Yes gas is good. All very good information. I will check it that rout when I get back to it tomorrow. I will throw out that the Holley street dominator intake accepts a spread bore as well as a standard bore. I am using the same style gasket for both the Edelbrock and Holley carburetors...

Well the good thing on this 800 is I am not totally committed to it. The guy I got from basically told me to try it out and see if I like it. I was in the market for a carb and price is right. He said it came off his jet boat and was removed for EFI. Obviously I won’t be drilling...

I don’t disagree. I don’t have a problem rebuilding a carb. I am more wondering if there is something specific to Holley such as the power valve that makes it not like this engine. I have a 750 DP on my 340 and runs well, however someone before me drilled small holes in the primary throttle...

i have a fresh 383 bored .060 over. New old stock direct connection 11.5 to 1 forged pistons, Mopar 292 .509 cam. Holley street dominator intake manifold. 906 heads with bowl clean up and port matching. No real porting though. When the motor was completed I did not have a carb for it so...

The performer will perform worse then the factory 360 manifold or 340 manifold. Most likely your 360 manifold has egr. Swapping to the 340 manifold will get rid of it. The main benefit of the performer is weight. I have run my race car with a 340 and stock 340 manifold to 12.01...

Make sure the plunger can slide down in the bore and it isn't binding on anything.

The plunger should have a spring on it inside the carb the pushes the plunger down in the bore activating the accel pump. The linkage pulls the plunger up at idle and moves down when the throttle is opened allowing the spring pressure to move the plunger. Remove the top of the carb and make...

I should have clarified. The Carter mechanical high output pump is not leaking. The electric pump is a pusher pump mounted next to the fuel cell outlet. The electric pump is leaking.

The pump on this car is of unknown brand. It has been on the car for 25 years or more. What is a good replacement pump that won't break the bank? The car has a mild 340 Probably around 400 horse at the crank. estimated. It still has the Carter mechanical pump on the engine.

The fuel pump is leaking where the power wire goes in so I think it's days are done. As far as the carburetor, I have boxes of fuel pump diaphrams and bowl gaskets. Just not sure if I should use them now or not. Will the new ones do the same?

I kind of already know the answer but just thought I might start a thread on it. My Holley 750 DP leaks fuel and my electric fuel pump leak fuel if I let them sit in the garage for a few weeks dry. I went out to the garage and check the fuel in the fuel cell. It was empty so I add a couple of...