no power off the corner, carb question

[Everfaster]

3/8 mile banked track, when i come off the corner and step down hard on the pedal the car act's like it's bogging down, then about 1/2 way down the streach it takes off.. runs good deep in,.. sounds good when i let off the gas and when i try to go, it has no power again... now in the shop as it is idling i can see fuel comming out of the sprayers... is my problem flooding and how can i fix it... i am planing on pulling the bowl off tomorrow and spraying down the carb and maybe hitting it with some air to help blow things out... the car as set for 1 yr.
Thanks

[Doug_Guilds]

Sounds like Pull Over to me. Do a search on pull over in the Mini Stock tech forum and you should find a bunch of topics on how to fix it. (some I started probably )

[Everfaster]

ok, that didn't help... i searched and came up with a lot of do a search... any body else got an idea... I pulled the carb apart and every thing is clean and nothing is plugged.... how do you know if a power valve is bad??

[Milford Motorsports]

Do a complete rebuild of this carb.Power valves,acc.pumps dry out get stiff from sitting around,passages get filled with gunk.Don't mess around,fix it right.

[ferd]

The current issue of Speedway Illustrated has an article about troubleshooting carb problems, I believe. They say to try not to out-think yourself because most of the time its dirt or misadjustments. They say that a bad power valve is rare, but Milford is probably right about rebuilding a carb that has sat around for a while. Also check that the fuel lines and vents are clear. Get your baseline settings, including float level, dead on. Check that your fuel pump is delivering adequate pressure, especially during the time you feel the bog. Make sure that gaskets are aligned correctly and are sealing.

[Headhunter]

Clean the carb out good and about all you can do for today is put it back together and set the fuel pressure if you can to 4.5 5 PSI and adjust the float level so that the fuel is about 1/16 to 1/8 below the hole. See if that helps..

Pullover is fuel coming from the accelerator pump system. The vibration of a 4 cylinder motor in combination with the amplifiing effect of being set off the centerline (off to one side) causes a pumping action between the float and the shape of the bowl. There is a cure that will stop this but only past idle. Some people have told me they have made it a little better by using the notched float or the circle track float (same thing) I never could prove otherwise.

That said, I chased a problem that sounds very close to yours and it was caused by a cheap fuel pump that could not deliver the proper amout of gas to the bowl under acceleration causing the fuel level to drop. Once the fuel sloshed back to cover the jets it would go fine when you let off the low fuel level and the gas moving forward in the bowl would uncover the jets do the same thing you have. If you have a cheap elecrtric pump you may want to try a better pump. those little square clicker types dont always pump enough fuel.

[84Dave]

Assume the carb is a Holley? The proper fuel level in the float-bowl has been discussed. Remove the carb, tip it upside down, and look at how the throttle blades are covering the transition slot. It should show about a .020"x.020" 'square' at the bottom of the throttle blade. If too much of the transfer slot is exposed, when you get out of the throttle into a corner, the high manifold vacuum can pull fuel out of the transfer slot & 'flood' the manifold/engine. Get back into the throttle out of the corner & the engine falls flat. Make certain the pump linkage is not contacting the pump lever @ idle. Leave just a touch of 'slop'. At a 45-degree angle, drill a .025" 'kill bleed' in the top of the pump fuel channel in the metering-block. Make sure the squirter is not too large. If the rest of the carb is in decent shape, tune-wise, a #19 or #21 squirter should get you out of a corner on a 4-cylinder. -Dave-

[Everfaster]

Thanks guys, I did just about all of that.. i unhooked the ele fuel pump. put the stock pump back on... disassembled the carb, checked every thing.. looks like the biggest issue was the accelerator pump was making contact with the lever and yes viberation... couple of turns and no more contact. will get a chance to try it out next saturday.
thanks
everfaster