Quote:
Originally Posted by Roberts68
I see what you mean on the T-stat. Since you can't determine if the gasket or cover could have been mishandled, compromised by being unclean mating surfaces etc that lead to failure I understand your decision. I can't help but wonder if that could not have been the case on the rebuild however.
I am in Monticello.
The reason I asked about gearing is I sourced a 12 bolt last summer with 3.55 that originally belonged to a '69 Z-28. I wanted it to still be 3.73 but someone had changed it.
My trans is a TUET11009 /Tremec T56 Magnum, a "close ratio" with a 2.66 1st, .80 5th, .62 6th gear. I am in perpetual build purgatory.
I have done some math or I should say used Tremecs website calculators and really just was curious if 6th will be usable as some people have told me it won't be. Or, at least one engine guru (also old school) told me that it will load up running off idle out of power band or too low on torque curve at cruise rpm etc...
Forgive the thread highjack, and granted you have BIG BBC torque on tap, but could you comment toward this? How do you like it and does this sound like a silly worry?
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Robert,
You have deeper 5th & 6th than I do, and the same rear end gear, so you will be running a little higher rpm than me, but not by much.
We built my motor with torque in mind, for use with the 6 speed. It will cruise at 14 or 1500 rpm ok, but we had to drop the advance to 17 degrees there to completely eliminate detonation at that high load/ low RPM situation. And, I have fuel injection, so we could tailor the fuel & timing for cruising as well. In my case, I can run in 6th, but only at about 65 mph or higher. When traffic dictates slowing below 65, I have to drop to 5th. Frankly, I'd be just as happy with a 5 speed, but that's because I usually don't drive at 70 or above as I am in the metro area most of the time.
You didn't mention what motor you're running, so I can't comment on how it will work, but it will need some torque to pull 6th gear. As long as it isn't cammed too wildly, you'll probably be fine. Depending on what you plan to use the car for, you can always drop to a 3.73 rear gear, but gives you a pretty low 1st, and closer shifts all the way up. I'd start where you are, and see how you like it.
I also had a C6 Z06 and didn't use 6th very much on that either. I viewed it as high speed/ low noise/ fuel economy gear.
BTW, I am in Maple Grove, so close by.
Bill