it stalls . . .

[Chaplin]

Yes, we are talking about 2 different things.

Jet extensions- From the sumimt catalog- (I bolded the relevant language)

"These Holley main jet extensions feature a new design that actually screws into the metering block. The main metering jet threads into the end of the extension, moving the fuel entry point for the main jet out into the the fuel bowl. When it's in this location, it cannot be uncovered preventing a lean condition during periods of extreme acceleration or braking."

And yes, Holleys have the same problem.

As for the a/f ratio, your dyno sheet should have a line with the a/f mixture right on it. To measure it at home, you need to get an exhaust gas analyzer and stick it in the tail pipe or install an O2 sensor in the pipes and take a reading with that.

[bnewell]

Rob ~ did you call Keith??

[scootter]

I had the same problem with my Holley HP 1000CFM with road race floats and jet extensions. I ended up buying a BG 850 and still had the stumbling problem in hard corners. I hooked up my A/F meter to see if was leaning out or running rich in corners. It was flooding in corners. So I keep lowering the floats till it stopped, but that ended up being a way to low. I set them at the lowest point in the sight glass. It isn't perfect but it is close. Keep in mind when you raise or lower the floats, it will change you A/F at idle. The best place to test it ended up being a parking lot at a business park on the weekend.
Scott

[rsimoes]

Originally Posted by bnewell

Rob ~ did you call Keith??

Yeah, but he told me to call Quick Fuel. I did and they were no help. Kind of surprising.

[bnewell]

thats too bad Rob. If one of my venders continually fails to provide support after the sale, I start looking for a new one. In my business, customer support is #1.

I hope you get it all worked out.

[Stentor]

Originally Posted by rsimoes

Yeah, but he told me to call Quick Fuel. I did and they were no help. Kind of surprising.

With the money that you spent on your engine with Keith, I would get back on the phone, and I would talk directly to him (not one of his employees).

With as many engines as he builds for Cobras (and installs through his shop in TX) this is surely not the first time a customer has had this problem. He also needs to know that Quick Fuel was of no help at all to you.

[cdnus]

I have a pro systems carb that does the same thing.
It came with extentions & whistles, I've had the floats up & down without any noticeable difference. I now accept that I just have to blip the throttle when it occurs.
It is definately a sloshing problem & cleans instantly when the throttle is blipped.
I have noticed that the whistles do not seal very well in the jet blocks & considering sealing them with epoxy. at this point I am not sure the problem is serious enough to warrant it.
Please let me know if you find a solution.

Craig