RPM's

PoisonDart74 said
As far as the curve is concerned, that's up to you on the spring selection, if it 'feels' better then go with it, if not swap back. It's one of those things you gotta play with to get right.

In fact, the whole timing curve and carb tune is one of those things you've got to 'feel' what it likes, you keep going till it doesn't like what your giving it, then back it off.

Make sure to check your vacuum advance setting as this is damn important to get good mileage! 48-52 total by the time it quits pulling. Ported vacuum works best on my setup, manifold feels spongy. You can adjust the canister with a 3/32? allen wrench inserted into the vacuum port on the canister, 1 turn is 1HG, clockwise add, counter-clockwise subtract.

Your on the right track with the carb, I still think you should check the plugs; hell pull em' after it cools down and look at the base ring, if it has 1 full turn of color your good. I know you can get real anal about reading spark plugs, but you can get close by just scoping them out at your leisure.

What carb are you running?

You know that is one thing I forgot to check. I will see where Im at with the vacuum hooked up. I ended up hooking it to ported vacuum also. Im just not convinced about the manifold vacuum and everyone says to hook up there. Thanks for the tip on the turn amount while adjusting it, thats good to know and will help make it easier to adjust. Im running a Holley 670 Street Avenger.

cannucky said
Sounds like you've found it to me , fill it up drive it for an hour then refill and do the math on your mileage . I would do it twice once around town and once down the highway , try not jumping on it during the highway run just find an on ramp gas station and go 1/2 hour from full there to an exit then loop back to the same spot refill and do the math , I bet you get at least 12 mpg .

I will do this when the weather gets better. Suppose to be raining here the rest of the weekend.

nm9stheham said
Sounds like you had all the fun today! It'll be interesting to hear your mileage now.

It actually was a lot of fun today. Everything went well.

fishy68 said
Sounds like you made some good progress and got real lucky with the dist. It's one of the MP distributors that has the Mallory type advance which sure makes it nice. Only thing is I would have expected it to like lighter springs than what you used but if it's running good leave it be. Check your mileage like Cannucky said. That's the only accurate way to tell what it's really doing. What the fuel gauge says isn't accurate usually. The one in my Cuda will go about 150 miles before it drops to 1/2 tank then it drops from 1/2 tank to empty in about 80 miles. Fuel gauges on our old stuff generally isn't linear so that's why the only accurate test is like Steve said

I could easily try those lighter springs again, but it seemed to be all in around 1500. I still have to have the fiance sit in the car as I rev it to let me know what the rpm's are when its all in now. I may have to switch back to those pink springs again. I was so damn happy when I saw that adjusting plate in it.. That makes it so much easier!!!

Im using after market gauges (Speedhut) and I can adjust the fuel gauge to full and empty. So Im hoping that is accurate, but I will do the old school math the next time I fill up. I just have to stay off the throttle.:burnout: