Quote:
Originally Posted by RET_COP
Sounds like your in a nice spot--just drive it. I have that combo and if anything a change to 3.55 because of the aluminum FW I have is something I may do, but with your TQ of 570 and no bucking and you want Back Roads AND Interstate driving I think you should stay. If you change the 5th gear to .64 you could then bump it up but 570 TQ !!? yikes
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I have a pretty good amount of duration in the cam but I'm guessing the 112LSA has something to do with it not bucking. The engine dyno is what was showing the 570TQ
Quote:
Originally Posted by jhv48
If you go for the .64 fifth gear, you're going to hate the 1000 rpm drop when you go from fourth to fifth. I switched from the .64 to the .82 as I was tired of having a useless fifth speed. Granted I could cruise at 75 mph with the engine barely running, but when I wanted some spirited passing, I had to drop to fourth. Now I turn 2600 rpm at 70 mph and my engine is right in its happy zone if I want to accelerate or pass.
Leave it as it is.
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If I went to a .64 you would need to run some pretty stout gears. After looking at the gearing calculator the 3.73 might be about as far as I would be willing to take it with the .82 5th. 70MPH with the 3.73 would leave me about 2800rpm which isn't too bad. This may be the least expensive thing to try first. Brent said throw the 4.10's in it but I think I do too much higher speed cruising for that.