how do they all affect each other?
larger tires (over stock diameter) will do what, "effectively" raise or lower the numerical gear number in the rearend?
or if i'm wrong thinking thats what a taller tire does, would someone mind explaining to me how tire size affects everything

if i want too be near peak power when crossing the traps (is that the right idea?) with a 4.10 gear, T56, and peak power at about 65-6600rpm what tire size would be ideal for me

i'm thinking i want to try a 27x11.5x15 QTP (28 might be too much and i dont want to beat up the fender wells too fit them)
should i look at another size, stick with a 26" maybe....

 

What you need my friend, is this : www.f-body.org/gears

Larger (than stock) tires will make your low (4.10) gear ratio act like a higher ratio (~3.90's for example). If you were already running a higher ratio like 3.42's, you wouldn't want to run bigger tires, 'cause then the overall ratio would act like ~3.23's (roughly). The difference in ratio can come from even just a 1" or 2" tire height difference.

 

Well you can always try the 27' QTP's out. I think you may run a little higher mph with that tire . That 27QTP's should keep you safe going threw the traps. I'm going to try another pair of 26's ETStreets on my car this coming march and I hope it will help me run quicker. The 28's I ran killed my bottom end. So ,I'm sure with the 26' ET Street ,my bottom will return with avengence with abetter 60ft and quicker ET . Good luck to you.

 

thenks fellas

so where do i want to be in the powerband when crossing the traps, peak torque or peak horsepower or redline?

according to that calculator and my peak power or redline, and estimated 1/4 mph, even with a 26" tire i will be safe

but does that take into account launching at 5000+rpm etc.and getting thru some of the gears sooner in comparison to distance traveled (unlike leaving at idle on the launch.....)

and will the 27" tire have a better contact with more sidewall bite then a 26" would have?