speedo problem

Busted Knuckles · 04-15-2011, 10:20 PM

I wouldn't dis you for your choice. A SBC is capable of a lot more performance than the smog-choked stocker. I've seen them punch out over 400 HP N/A with the right mods.

The trans speedo gear simply spins the speedo cable. The trick is to get the speedo cable to connect solidly to the speedo gear of the transmission. Since the Supra uses a two-piece system, you just need to get the short adapter piece modified to fit the the 350-TH

Then, you just need to figure out the proper ratio to get the speedo gear sync'ed to the supra speedo. If you can get a drill hooked up, like 'turbonicsperformance' suggested, you can determine the ratio difference between the chevy speedo and Supra speedo. Use that and the rear end gear ratio to figure the proper speedo gear set for the 350-TH and your good to go.

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04-15-2011, 10:20 PM	#4
Busted Knuckles 12psi boost Join Date: Dec 2007 Location: Atlanta Posts: 300	I wouldn't dis you for your choice. A SBC is capable of a lot more performance than the smog-choked stocker. I've seen them punch out over 400 HP N/A with the right mods. The trans speedo gear simply spins the speedo cable. The trick is to get the speedo cable to connect solidly to the speedo gear of the transmission. Since the Supra uses a two-piece system, you just need to get the short adapter piece modified to fit the the 350-TH Then, you just need to figure out the proper ratio to get the speedo gear sync'ed to the supra speedo. If you can get a drill hooked up, like 'turbonicsperformance' suggested, you can determine the ratio difference between the chevy speedo and Supra speedo. Use that and the rear end gear ratio to figure the proper speedo gear set for the 350-TH and your good to go.