A good friend of mine in Kansas just sent me 3 Holley 94 carbs for free. Here is my question..I haven't messed with these carbs in over 50 yrs..Is the CFM on the 94s the same as on the 97s.??..About the only differance I can see is the Acc. pump is on the inside and not on the outside as on the 97s.. And why is the 97s so much more popular than the 94s...But since they were a gift,, they will be on the car anyway..
There is more than one version of the 94 style carb. The highest flowing ones would be the "ECG" style that came on '56 292 engines.
With the 97 you don't have to disasemble the carb to change jets. The jets are just below the float bowl behind some plugs. You also can change out the power jet. I think that the 97 and the 94 flow about 150 cfm. If you measure the throttle ****erflies I think they are the same. I believe 2B runs 2 94's and he seems to make that flathead go like a bat out of hell. Are you going to run them on the 194? if so a couple of those would be about 300 cfm, just right. Roy
Yea I'm going to use 2 of them on my 194+" motor.. I told Rocky tonight that I'll take a picture or two.and see what ya think... BTW.. I have a ECG carb also....But not to use....
I remember reading something on the main board a year ago or so, that 97's are all mechanically controlled inside, and 94's are vacuum. This is what made the 97 so popular for the hop up crowd- no goofy vacuum signals. I don't remember now if it was only the power valve in question, or if there was more to it than that. It'd be worth a search for that thread.
Thanks.. I'll check into that.. Not sure just how much, if any vacuum this set up will have.. I have that CRS on this deal... Hey Roy,, These have the plugs in the float bowls to take out and get to the jets.. I'm happy with them....
Power valve on the Strommie works off a linkage rod & pivot (it runs the acelerator pump too). When the pump gets far enough down it's bore it hits a plunger that opens the p***age for the power enrichment jet. That, I've always been told, is why the Stombergs were preferred over the Holleys for multi carb setups, they always open the power valves consistently, and no vacuum anything to blow out (I have a pair of 81's I'm tinkering on). FWIW I have been told by some of the locals that run hopped up A & B bangers that the '97 is somewhat too big for them (just over 200 cubes). I have no idea how hard or what they have tried to tune them, but they claim the engine will 'pause' if you are cruising and gas it, before it takes off like a house affire. Not sure that's a problem in a rail car, that and you probably are willing to wind yours quite a bit tighter than they do theirs.
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