Re: Spirit 2.5 and...

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: farna@xxxxxxx
" 
" The 2.0L fours used a 3.58 rear gear in Hornets with an auto, the stick
" was lower!

yeah, but didn't someone say that the 151s and the few 150s had 3.08s?

" remember also that the 58-63 American will be more like a Jeep XJ
" than a Spirit frontal area wise. The fours in those use a 4.10 gear!

true, but the jeep is heavier and performance expectations have risen.
the base 2dr, 2wd, 4cyl/5sp xj se is ~2800lbs, but that's lacking just
about every option available and while i'm sure many price-leader
'strippers' were made, most cherokees had an additional several
hundred lbs of options onboard.  and the later 2.5/150 is definitely
tuned for higher-rpm operation [torque over 3000rpm] than the 4.0 or
earlier fours, with the possible exception of the audi-originated 2.0.

" I'm sure you will agree that may be a bit much, but I'd think
" 3.08 would be way low unless there is a low first gear or an auto trans
" is used.

on the t4/t5, first -is- low, around 4:1.  the sr4 is 3.50:1 iirc.

" The 196s' big strength is super torque right off idle. With a
" little four you won't have that. The fellow I helped out had an old OD
" car, so the 4.11 rear axle. With the Pinto four speed it was great!

the ohc 2300 is pretty good at revving, considering its age.  not
surprising it would work well with a low axle.

" First was a little on the low side, but not bad. Car wouldn't start in
" 2nd unless on a level or downgrade. Don't know for sure, but believe
" the SR-4 was geared the same in 2300 Pintos and AMC sixes.

iirc that's right.

" If to high a gear mileage will go down from having to work the
" engine to much to get the car moving.  At least average mileage.
" Interstate driving might go up, but unless you have long commutes
" wihtout many stops and starts it won't help much. 

 this is true.

" On November 28, 2005 andrew hay wrote:
" 
" > i don't think so!  iirc 4-cyl spirits were geared 3.08, for mileage.
" > i'd stick to that in the american, if mileage is the objective.

as i said, whatever ratio the donor car had - use that in the
american.  that's assuming [reasonably i think] the american's tires
are close to the donor's in diameter.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought