@Demonx2 said VVVVVVVVVVVVVVVV
I looked but didn't see if you posted the intake you're running. I have a Super Victor intake with a Holley 850 DP and am working on a hesitation I get when I open the secondaries. As long as I don't go deep enough to open the secondaries, the response is crisp. Front likes a 31 shooter and standard white pump cam in hole #1. But mashing the pedal all the way down and I get a pretty good hesitation. Been working the game of squirter size and pump cam on the rear. It seems to want even more than a 37 shooter and either the brown or bigger cam. I am getting some larger shooters to try.
Wondering if you would share the shooters/pump cams you are using? Mine is a 408, 251/255@050 SFT cam, mildly ported Eddy RPM heads, 28"W tire, 5000 stall conv, guessing car weight at 3100#'s plus me. Best so far is a 7.11 eighth mile. Has a 4.56 axle so no need to spin it up in the quarter...too much rpm 6700+ and the engine does not make power up there.
Thx for any insight!
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So first off i use to have a 3000 stall and i went back to my LD 340 manifold. this winter it will be getting a single plane back on it.
I went up, down, and sideways in pump shots and pump cams. tried every combo under the sum and didn't fix my problem.
Remember You have a 30 CC pump..........no matter what squirter or pump cam you put it......That's all you get!!!
Now that i have said that, put your pump squirters or pump shot back to what the carb came with
2nt you stumble is NOT because you have to big or to small of a pump cam or squirter Period. Your secondary stumble is that you don't have enough primary pump...... think a bout that for a second......... then watch this video.
About 2:20 in the video i do a slow mo of the carb. this is done in gear with my foot on the brake. Noticed the spray volume from the primary and the secondays.......Both are 30 cc pumps......
The problem is that you are using up some of the 30 cc raising up the rpm to stage the car. whack it to the floor and there is not enough squirter left and leave a hole or lean condition because the fuel thru the Venturi has not started to flow yet.
Make sence?
There was Two thing that help and basically fix my stumble after 2 years Fing with my demon carb and building and F'ing with Proform carb.
#1 throttle fineness......Instead of a wack it to the floor board like you want to push it Thru the floor board.........a vary fast but Rolling the throttle to the floor.
#2 I put the stock squirters back in....think they are 33s and changed to the red or pink pump can and put it in position #2.
This cam has a vary slow starting ramp and don't give much pump movement just off idle so there is more for the launch. So its a bit stumble off idle. But delivers all the fuel needed to get the main booster flowing fuel.
I may have to brake down and buy a 50cc pump on the primary side of the carb. but the secondary stumble at launch is gone.
