FE428, cable throttle linkage, brackets springs etc

[KevinW]

Thanks Dan. Yes you're right - the pic shows the assembly works neatly and logically on a LHD car. Beginning to wish I had gone LHD, as I don't think it makes that much difference if you are open-top driving, but my levels of authenticity obsession weren't at their current peak back then. Its a mess on a RHD car, as the gas pedal is still designed for your right foot, but now sits on the outer RHS position of the footbox.

Brian - good tip, thanks for that.

[Luke427]

Patrick, you've just enlightened me!!

Check my other thread - last post on the 'too much power too quickly with 8 barrels' discussion.
I think I have the opposite problem where secondaries open suddenly resulting in a dangerous behavior (the engine develops 560 hp and everything kicks in around 4000 rpm at about 50% throttle, which is quite a surprise).
I'm going to investigate the secondary opening springs.

thanks again

[Luke427]

Patrick this is awesome, I know what to do to fix my brute. I'm exactly in the situation where secondaries open suddenly after a subtle bog, making the car dangerous.

Looks like a pair of Quick Fuel canisters is going to be on my next purchase for the car!

[patrickt]

Originally Posted by Luke427

Patrick this is awesome, I know what to do to fix my brute. I'm exactly in the situation where secondaries open suddenly after a subtle bog, making the car dangerous.

Looks like a pair of Quick Fuel canisters is going to be on my next purchase for the car!

And if you can't find adjustable QF canisters that fits your Holley carbs, just go for their Quick Change kits. I saw your thread on trying to slow her down a bit. Some stiffer vac springs might be "just what the doctor ordered," for around-town driving, at least. With dual quads on there, you'll still have four barrels feeding her even if you have the stiffest "truck spring" controlling your vac secondaries.

[davids2toys]

Great info Patrick, thanks. Will have to look into adjusting my mechanical secondaries. I get the subtle bog then BOOM!

[undy]

Originally Posted by davids2toys

Great info Patrick, thanks. Will have to look into adjusting my mechanical secondaries. I get the subtle bog then BOOM!

You have two accelerator pumps, one for the primaries and another for the mechanical secondaries. If your secondary pump's actuating arm is adjusted wrong and you're not getting a shot of fuel as soon as the secondaries start to open then you'll get an initial bog. The fuel slots in the venturies don't pick up the job until after the accelerator pump has shot its w@d. It's not at all an uncommon problem.

[patrickt]

Originally Posted by undy

You have two accelerator pumps, one for the primaries and another for the mechanical secondaries. If your secondary pump's actuating arm is adjusted wrong and you're not getting a shot of fuel as soon as the secondaries start to open then you'll get an initial bog. The fuel slots in the venturies don't pick up the job until after the accelerator pump has shot its w@d. It's not at all an uncommon problem.

That's why I like my carb. Just one single, simple carb, one single, simple accelerator pump, one single simple vacuum secondary canister. Other than the floats and idle mixture screws, that's it.

[Luke427]

Originally Posted by patrickt

That's why I like my carb. Just one single, simple carb, one single, simple accelerator pump, one single simple vacuum secondary canister. Other than the floats and idle mixture screws, that's it.

Yep, that's a fair point. I was fairly happy with one 750 cfm (but maybe 100 less ponies)

[davids2toys]

Originally Posted by undy

You have two accelerator pumps, one for the primaries and another for the mechanical secondaries. If your secondary pump's actuating arm is adjusted wrong and you're not getting a shot of fuel as soon as the secondaries start to open then you'll get an initial bog. The fuel slots in the venturies don't pick up the job until after the accelerator pump has shot its w@d. It's not at all an uncommon problem.

Well, it is not that anyway, it is adjusted correctly. any other thoughts?