Quote:
Originally Posted by Marty68
this is why I asked, I may end up with too LOW of an rmp with 3.42 gears .76 OD
3.42 gears 26.5" tires .76 OD puts rpm at 2142. time will tell if this is ok or not if not shorter tires may not be the best option a .86 od may be
or a lower rear gear such as 3.73 or 4.11 I have frequented the rpm calculator site
|
Experimenting with shorter tires isn’t really an option for you. At 26.5 you’re at the bottom end already.
A .86 o/d would bring you up to 2400 rpm.
That might be an ideal ratio for your motor.
A 3.73 with a .76 o/d gives 2300 rpm and a 4.10 with a .76 gives 2500.
Which way to go depends on your skills and budget. Changing o/d ratio or rear gears can be costly.
A high winding 283 or 327 might like the .86 better. A 383 or bbc could handle the .76 better.
Most times gearing is a lot of trade offs!
For Cadillac al this is all calculated at 65 mph.