throttle valve cable geometry

joeboy said
totally feasible, and a good plan.

The original FAST XFI for the hemi uses a GM (LS) throttle body adapter and that is exactly how mine runs now (LS TB) so there should be a readily avail adapter. I actually have 2 winter projects along the same lines:

1. An old/tired '90 chevy truck that is getting a 5.3 LS motor and will need to control the 700r4 TV cable off the 80mm factory TB.

2. I just snagged a 200r4 for my 5.7 powered Dart, and am going to need to figure out that one as well.

I have read quite about about the TV stuff, and seen the TV made EZ product from bowtie overdrives.

Ive decided the TV made EZ is my backup plan for the truck, (due to cost of their stuff for my beater truck) so my goal is to weld my own tab/bracket to the TB or the truck, and then use that basic geometry to fab a TV bracket to the side of my FAST (aluminum) TB. I had to fab a throttle bracket for the car already just for cable drive throttle with my 727 kick down. Im hoping not to have to change much with it...

Here is a basic diagram of the correct geometry you need for the TV cable, and a few pics of "home-brew" brackets like you would need. A little leg work for sure, and some damn high school geometry, but much cheaper with simple tools...

just food for thought: my TB is a 92mm, and I was worried it would be too much for the 5.7... Its not at all, it runs like a top, and moves serious air, so if you can snag a larger LS TB, I would...

joe

Joe,

Thanks for the response, I had really started to think this forum had died or something. Fast does have a bracket made by Comp to adapt their 92mm big mouth throttle body to a 5.7 hemi. In further research, I have noticed the 3 bolt style original LS1 throttle bodies have an IAC hole above the throttle port that meets up with a hole in the original LS1 manifold. Outside of somehow modifying the throttle body or the adapter plate to port that air back into the original throttle hole it would be impossible to run on the hemi. This leads back to just running the fast 92mm adapter and an aftermarket 92mm 4 bolt throttle body modified with my own bracketry for the throttle valve cable.

Cost is a bit of a wash between the two. I'd have to buy the throttle valve cable kit from Lokar regardless which is around $80, making the rest of the BTO kit worth $90 (to them). A stock throttle body with the IAC and TPS sensors is around $100 on ebay and I'd have to fab my own adapter plate. A total of around $270.

Whereas the fast adapter plate is $65, an ebay 92mm 4 bolt throttle body is around $100 with the TPS and IAC, and the lokar cable is $80 plus fabbing the bracketry. A total of around $245.

The majority of the aftermarket throttle bodies however use what appears to be an aluminum throttle cam, which would greatly complicate the bracketry fabrication and welding. It would however give me a bigger, better flowing throttle body with which the eventual cam and eagle intake possibly would make use of. Lots of ideas, I just want to be sure I don't spend thousands of dollars to have a transmission built and a cable is its downfall.

Ryan

65-440 said
Just curious .... why not run the NAG1 that came behind the 5.7 ?

The NAG1, to my knowledge, requires a multitude of wheel sensors, a factory computer and is also geared poorly for swap applications (exceptionally high (low numerically) rear gears in factory cars for highway mileage). Not to mention it's size not being conducive to fitting in my car, precisely why I went with the 200-4r.

Ryan