eddie meyer hi rise intake problem

i just installed a eddie meyer hi rise intake and now the motor has a dead spot right around 1000 to 1200 rpm's. Is this normal for a high rise since there's more vac*** in such a tall intake or can i advance the timing. Please help! Heres some pics.

 

Don't know what's causing your problem,but it ain't the intake manifold.

 

It sounds like the vacuum advance on the stock distributor isn't going to work for you with dual carbs.

 

Hi Dug !

 

Hey Eric!

 

Why do you think that there is more vacuun with a high riser?

I would be looking at the transition from idle jets to main jets and thinking carb troubles .

traderjack

 

I was thinking less vacuum but I was only making a guess. I've never run a flathead with duals with a stock distributor.

 

Common consensus seems to be that a stock 8BA dist. wont work very well with duals..
94s are also renowned for an annoying off idle stumble..

searchy search.....your friendy learny helpy thing!

 

was running two carbs on the old low manifold and it was VERY responsive,i didnt change the idle or air/fuel jets, so I was thinking more air betwene carbs and block,ie, more va***e, I did however, retune carbs sence,at idle, and lost a lot of delay but theres still a dead zone.I guess it just takes longer for the fuel to get to the cyliders?

 

Is that a Speedway intake? I read somewhere on the HAMB that a guy had a problem with his repro Eddie Meyer from Speedway.

I think he had to resurface and port match stuff to get a nice seal. Maybe you have a vacuum leak too?

 

That would be my first guess, did you use new carb and manifold gaskets when you did the changeover?

 

its not a repop, my dad gave it to me, he bought the thing in 1964 for 25 bucks and never used it so I talked him out it. I did use all new gaskets when i did the swap,I guess its like runnin a tunnel ram, no low end, but after 1300 1500rpms, o boy! I think I'm just going to have to live with it, and chang my driving habits. Hey thanks for all your help, Im new to this, and any new info helps!

 

I'm running a repop EM high rise on my 8ba with two of the new 97's, no flat spots anywhere.
If anything they are noted for low end street perfomance. I'd vote vac*** leak also. Are
the gaskets between the upper and lower manifold new ? It'll **** vac*** there too. Also whoever mentioned the stock distributor is right, it doesn't lend itself well to multi carbs, you might make it work but I don't think you will ever realize full potential with it, I'm running a mallory cent. advance.

 

I had a similar problem with a dead spot with my Hexagon Tool intake and two 94's. It helped a lot to use an air cleaner with filter, rather than running without any restriction. Maybe worth a try...

 

I ran two 97's on a hirise Weiand and always had to have the idle turned up to about 1,000 to make it run. I thought I had to live with the problem caused by the tunnel ram-type intake. Not so. It was a carburetor problem. Then I sent my carbs to Uncle Max for rebuilding. Now I have smooth sailing from idle at 500 RPM all the way up to "HOLY ****" RPM.

 

I am uncle max & I approve of this message.

 

cool, maby Ill retune carbs and check gaskets as far as a new distributor, any suggestions?

 

is the EM intake a different mounting angle than the low rise you had on it?? this could effect the float level of the carbs if it's a significant difference

 

no, the angle is the same, the carbs are closer togrther by1 1/2 inchs so i had to shorten the rod. but both are still open/closed at the same rate

 

forget worrying about the distributor, remember that they were running those distributors many years before they came up with better,(?), distributors.

You might need better if you are into 5,000 rpm stuff, but you could never tell it on the road.

But it on a machine, see how it looks, and then forget it!

All my opinion, of course.

traderjack

 

It looks like you using Holly '94's? What size power valve are you running? Do you have them both pulling together or on progressive linkage?

 

You may have to step the power valves down on the Holleys. I ran into the same problem getting them to stop stumbling off idle. If you running a pair then you will have to do that.

 

I am willing to bet a 100 bucks that you need to change the arm on the accelerator pumps on the carbs to give it a little more fuel. The flat spot happens when it leans out right when you open it up off idle. Let me know, I am curious, Joe

 

BUT, did you replace the gaskets between the tower bases and the manifold body?

A friend had a 32 3W with a hot flattie with that manifold and had problems until we replaced the tower to manifold gaskets, then ran and drove in all ranges very well.

 

ok ,I feel a bit silly,but I found the problem, accelorator pump, moved from #2 to #3, no more flat spot! thanks for all your help!