Tire size change relative to rpm......?'s

[FastAOD]

Guys i am thinking aboiut going from a 26" to a 27" ET Street. With no other changes, what rpm decrease could i expect?

I searched for online calculators, and all the ones i tried gave me completey different #'s.....Anywhere from a 150-600rpm drop......Does anyone have 1st hand knowledge on this?

Car has 3.55's and currently traps @ 6350 or so....Im trying to bring the revs down to 6000 @ the traps. Stock block/crank/rods = 6000rpm and below is where i live. LOL

Thanks guys,
Miles

[RdRunnr]

Miles,

What converter do you run with the AOD?

[FastAOD]

Eric PI 3500, got any insight as to how much rpm will change?

[RdRunnr]

It would probably bring it down 100-200 rpm or so...I think going from a 26" to a 28" accomplish your goal.

[FastAOD]

Thanks Eric..

[rsw007]

goto the bottom of this page. but it wont count for converter slip if your running non lock-up. but its good for determining different gears and tire combos.
http://www.mustangworks.com/analyzer.html

[FastAOD]

Thanks rsw007 for that link....it helped a bit...

[2MUCHBOOST]

Miles I found this site to be pretty damb close.
http://www.hardcore50.com/members/calculators.htm

[FastAOD]

Hey thanks Ray, im gonna check that out....