Bogging down in hard turns and aggressive uphills?

I posted this on the Tech Q&A forum, but it's related to hard turns, so I hope you don't mind me asking you here.

I have a '65 Satellite with a mildly warmed up 361 (9.4CR and more aggressive cam) with the factory 2bbl Carter on it.

I took her out for a spin last weekend and drove her harder than usual. She handled really well - no complaints from the suspension [FirmFeel hollow front sway, stiffer shocks, 225/70/14 BFG T/A's on Ford 14x6.5 rims, tracked flat and solid in tight turns]

However - in hard turns and heavy acceleration up steep uphills the engine would bog down, as if starved of fuel, until I let off the throttle and nursed the engine back. (I never tried hard acceleration on downhills, that's too dangerous around here).

It didn't bog every single time, never on a flat straightaway only hard turns and hills, it never stalled completely, and it recovered in 2-3 seconds of easing off throttle.

Fuel tank was about half full.

I've never had a bogging like this on any of my Mopars before - and I've driven them just as hard on turns and various accelerations.

I am thinking fuel starvation. Could there be another reason?
What would you all suspect?
- Improperly set float in the carb - not enough fuel in the bowl?
- 2bbl carb and bowl is too small for the demands of the cam under those conditions? (Slap my spare trusty rebuilt AVS 4bbl on it?)
- Faulty (or inadequate) fuel pump? The original mechanical one is still in use. Bad diaphragm? (New fuel pump, or add electric pump?)
- Fuel tank pick-up exposed to air under heavy acceleration? (Do I need tank baffles?)

Thank you,
- Art

PS - I'm spending a day driving against the clock at a local road course June 6th and really looking forward to it. I'll bring the GTV6 this time. The '65 Satty will get a chance once I get her better brakes.

Don't know the answer, but I'd think float level first.

However, if you are tossing it around enough for that problem, I'd suggest to be sure and have a mechanical oil pressure gauge, since the float might e saving your bearings right now. Just a thought.

Float level and the pickup in the tank are the first two things that come to mind. Try it again with a full tank...

Hi JC, I didn't know you lurked over here, Cheers!

Do you mean potential oil starvation because oil is sloshing away from the pick-up? I'll get a pressure gauge installed ASAP and look into it, if that is what you mean. Slowly setting this monster up as a trackable car.

Thanks for your opinions so far, I'll fill 'er up first. I have a new fuel pump and new fuel filter on the shelf, so I'll install those as "low hanging fruit" to try solving the problem. Then I'll go to the auto store and buy me an oil gauge.

Best,
- Art

What fuel pump?

You might be drinking gas faster than it can keep it full. A fuel pressure gauge would narrow it down.

Not sure but the same thing happened to me a few summers ago after letting the car idle for 10-15 mins after some spirited driving...it was fine before and after any time I really hit it hard it would bog and almost die..kinda like hitting the rev limiter in a modern car

The boys here told me it was vapor lock, it never happened again after I put in a phenolic carb spacer to isolate the carb..

Hope this helps..

PLAZ

Hello,

Sounds like the other have said especially knowing it the 2BBL. Those bowls are small. I really don't think adding more in the tanks will do anything. Did someone rebuild the carb and use an auto parts store kit? Many of those have undersized needle and seat assemblies and will not flow enough fuel for lets say exuberant driving. Put old trusty on and my bet problem gone. Kills two birds with one...besides you said that working towards a track oriented car is the goal and you have the carb!

Damon

Thanks again all,
I've not been able to get into the car this week, but I appreciate the suggestions. I'll start with the easy thing: fill the tank. May not be the issue but it's easy. Then I'll see if the fuel pump shows any visual problems. Check the fuel filter too just in case and I'll look at the float adjustment too. The weather was plenty cool when it was bogging, so I'll just keep vapor lock in mind if I run out of options. Since I'm going to install an oil pressure gauge, I'll do one for fuel pressure too. If the above solves the bogging problem, I'll still eventually go to the AVS. But I'll do it knowing what solved the bogging.
Cheers, I'll be on this forum as I look forward to some track time next year.
- Art

OK, filled her up with gas and drove her hard around a little-used traffic circle near my house. The problem didn't repeat.

I notice the gas gauge will change quickly depending on turns, uphills, downhills. So I'm going to work from the theory that the "license plate filler neck" tank design can starve the fuel pickup when the tank gets on the low side..

As this tank of gas gets low, I'll see if I can repeat the problem again.
- Art