Progressive TB linkage

Viperwolf1 · Feb 18, 2010

I got tired to the overly sensitive off-idle throttle response of my 65mm explorer TB. I made some measurements of my pedal travel, drew up some ideas, and made a trip to the hardware store. I found a cheap pulley with a steel wheel about 1 1/2" in diameter. I cut about 40% of the wheel off so it would not interfere with the kickdown cable at full throttle. It took a little experimentation to determine the proper mounting position so to gain full use of the available throttle travel. I think this just might work.

broncnaz · Feb 18, 2010

Good idea. If I remember correctly my 87 BII had a similar setup from the factory

Broncobowsher · Feb 18, 2010

I did the same on my old Projection. Instead of your wheel I found some junkyard engine that had a bolt on cam and by welding bolts to it that lined up with the holes in the throttle linkage I made it a bolt on.

MarsChariot · Feb 18, 2010

Excellent iea. I have been waiting for someone to come up with something clever. That very problem has been bothering me. Let us know how well it works.

Viperwolf1 · Feb 18, 2010

MarsChariot said:
Excellent iea. I have been waiting for someone to come up with something clever. That very problem has been bothering me. Let us know how well it works.

I hope to try it out soon. My Bronco's been down for repair and upgrade for a while now and I just got the trans and tcase back in. I'll post up the results.

sprdv1 · Feb 19, 2010

Nice job on that man

Viperwolf1 · Feb 28, 2010

It works pretty damn good. Feels just like my my modern truck now. I can actually slowly accellerate from a stop. I highly recommend this for anyone using the 65mm throttle body. No more snapped diffs for me.

Bronco_69 · Mar 1, 2010

looks good.

have yopu modifed the pivot point on the gas pedal yet? it is WAY differnt then a modern efi engine.

Viperwolf1 · Mar 1, 2010

Bronco_69 said:
looks good.

have yopu modifed the pivot point on the gas pedal yet? it is WAY differnt then a modern efi engine.

Nope, stock pedal. I don't see any need for that now.

NJB71 · Mar 10, 2010

Viperwolf1 said:
I got tired to the overly sensitive off-idle throttle response of my 65mm explorer TB. I made some measurements of my pedal travel, drew up some ideas, and made a trip to the hardware store. I found a cheap pulley with a steel wheel about 1 1/2" in diameter. I cut about 40% of the wheel off so it would not interfere with the kickdown cable at full throttle. It took a little experimentation to determine the proper mounting position so to gain full use of the available throttle travel. I think this just might work.

Hey Viperwolf, how is the expirement working?, noticed my Throttle is beastly on the efi set up, 70mm explorer TB, was the mod easy?

Viperwolf1 · Mar 10, 2010

It's working great, no problems. Much more throttle control right off idle. It's almost like having a lower first gear. It's easy. I had to drill two holes in the BCB throttle lever, lengthen the throttle cable (actually cut the sheath shorter), and I had to add a throttle return spring.

NYLES · Oct 13, 2010

Me likes!....

bigmuddy · Oct 13, 2010

progressive TB linkage

Viper did you still have the standard explorer linkage on the TB? I converted mine to the mustang bracket using the Lars mod. And can you explain how you extended the BC throttle cable.

thanks Ben

Viperwolf1 · Oct 13, 2010

bigmuddy said:
Viper did you still have the standard explorer linkage on the TB? I converted mine to the mustang bracket using the Lars mod. And can you explain how you extended the BC throttle cable.

thanks Ben

This TB was converted to the mustang lever before the BC kit was installed. I have also done this to a standard explorer TB with the BC kit. The standard explorer TB went faster but probably because I had a good idea of what I was doing the 2nd time.

The BC throttle inner cable is a little long to begin with. With a new one the length may be ok. If the inner cable has been trimmed already you can extend it by pulling the inner cable back and cutting the sheath the amount you want to extend the inner cable. Make sure the sheath is going to be long enough first.

bigmuddy · Oct 14, 2010

Ok I think I got it. I am running the explorer TB with the mustang linkage installed and actually have the BC cable kit sitting on the shelf. So it sounds like I am good to go after I find a pulley?

Thanks Ben

Progressive TB linkage

Viperwolf1

electron whisperer

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broncnaz

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Total hack

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