FITECH EFI Coolant Temp Sensor Calibration- Tuning for BETTER MPG 

Yeah But!!!

Hope to see you along the way or at the show!

The O2 sensor may not be letting me dial in like I want!

Thanks Bryan!

Haha! You might be onto something Will

It started that way to me as well Glenn!

Thanks for the tips. I had been playing with the timing and I do know it spark knocks under load at approx 38-40 degrees. I am still running the stock distributor so a more modern Pertronics may be in order. I'll keep messing with it and keep Y'all posted.

@@OldeCarrGuy There should be a lot less load at cruise so are you referring to having to give extra throttle as load? If this is what you're referring to then there should be a vacuum drop with added throttle backing off the vacuum advance. Total timing should be around 32° to 36° wherever your engine likes it to be. Vacuum advance will add even more timing at cruise when there is less load at lower rpm where it will pull more vacuum. Total timing should be set with the vacuum advance disconnected just like idle timing is set. If you have a non-factory cam then you shouldn't set your timing at a idle setting. You should be setting it at a total timing setting. Wherever the idle setting lands is what your idle setting will end up as. You'll possibly want an adjustable vacuum advance canister to add or limit timing when the engine is pulling vacuum. A factory distributor is set for the certain factory combo it was originally installed in. When you change what the factory did you have to start from scratch to make your custom engine combo happy. Using a factory distributor sometimes you will need to open up the slots or shorten them on the mechanical timing advance to limit or add movement if the idle timing is to high or to low if your engine doesn't like where it ends up because not all factory distributors are the same. So if your engine starts hard because there is to much advance at idle with the total advance set where the engine likes it the mechanical advance slot needs to be lengthened. If there is enough idle timing the slot needs to be shortened. There is a really good pinned thread on the subject that goes more in depth on v8buick. With the first 3 letters of comment, if I wrote it proper yt would make what I wrote disappear.

For sure!

Thanks for playing--we have some lovely parting gifts...😆

Thanks herm

I had been playing with the timing and I do know it spark knocks under load at approx 38-40 degrees. I am still running the stock distributor so a more modern Pertronics may be in order. I'll keep messing with it and keep Y'all posted.

Definitely. Headers need to be removed for that! 🤨

And Ryan's advice!

Definitely!