914-6 throttle linkage setup/adjustment, Anybody written it up in detail w/ pics? Options

[campbellcj]

I just swapped-out my pedal cluster for a rebuilt one with a reinforced throttle bellcrank thingie, bronze bushings etc. The clutch and throttle cables are essentially brand new too.

The reason I swapped it is because the throttle-thingie was bent to hell on the old one AND the bushings were shot -- this led to me losing almost an entire day at the track due to inconsistent/sticking accelerator issues (i.e. idle was anywhere from 600rpm to 4K, LOL). It appears the PO decided to install a throttle-stop on the pedal board AFTER the throttle arm thingie on the cluster was already bent to shit. (Yes, I DO have a pedal board and throttle stop on the car.)

Anyways...the cluster swapout was no big deal, although DWD did set in a little bit (I found plenty of gook, spare change etc. under there, zinc-sprayed the area, rewired some of the tunnel and dash stuff, etc.)

Now it seems like the throttle is kind of maxed-out, i.e. I "loosened" several things to get more length/slack but it still barely hooks up without putting a preload on the carb linkage. The cable adjuster at the pedal end looked pretty normal; didn't fuss with that. I loosened the cable adjuster at the trans bellcrank essentially all the way to the "slack" direction. I also slightly lengthened the trans bellcrank to carb linkage rod-end.

So now I'm getting full throttle engagement with what seems like not a lot of pedal travel and the pedalboard stop is virtually all the way out. Is my throttle cable too short for some reason? Or do I just need to basically start over and "equalize" everything again...hence the request for any tips or pics of the procedure. There are so many little adjustable things in this linkage that you get a major chain-reaction when you change one of them.

Sorry for the ramble -- I've been working way too much lately and my brain is fried -- hopefully this makes sense somewhat.

[campbellcj]

Howard, I'd like to check out your custom cable linkage. That sounds cool.

I got mine to a "mostly OK" point just now. The main issue I found was actually the pivot where the rod from the trans connects. The circlip had popped off and the bushing is pretty much shot (i.e. missing) too. The pivot was therefore flopping around all over the place on its shaft. I couldn't find an exact-fit bushing at the local hardware store but I got one that can possibly be modded to fit. I replaced the circlip & washers so the pivot can't move nearly as much on the wrong axis..

It seems like I still need a teeny-weeny bit more cable or rod slack somewhere because it does not snap back down to idle positively/consistently. Sometimes it kind of drifts down or stays at an elevated idle. (Maybe fresh throttle springs would help. Do they wear out over the years?) The linkage does not seem to bind up between the carb idle stops and WOT stops when operated by hand (from the carb end). It easily returns to the idle stops when you manipulate it by hand but only "sometimes" when actually driving. (IMG:style_emoticons/default/confused24.gif)

I got my oil press gauge hooked up finally too. I had hoped to tackle more this week, but work is extremely busy right now. After 13+ hours of work+commuting I am usually too hungry & tired to fart around with the car (IMG:style_emoticons/default/sad.gif)


Car seems checked-out to make it there and back on Saturday. (IMG:style_emoticons/default/boldblue.gif) The drive will be interesting with this ultra-short gearbox (basically full of 3rd gears).