Re: [Amc-list] Overdrive gearing.

[Wrambler242@xxxxxxxxxxx]

Yeah, but, I bet my 4.0L will break it!!!!!!

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5

 -------------- Original message ----------------------
From: Tom Jennings <tomj@xxxxxxx>
> On Tue, 22 May 2007, Wrambler242@xxxxxxxxxxx wrote:
> 
> > The only choice I can find for a replacement set of gears
> > for the T5 puts it at .81 overdrive ratio, this would put
> > me knocking on the door of 2500 rpm at 70 with 3:42's leaving
> > nothing leftover for faster cruising.  > I may try the 3:73 axle
> 
> Ha! I got you all beat!
> 
>  		1st	2nd	3rd		2nd OD	3rd OD
> RPM	CFM	MPH	MPH	MPH		MPH	MPH
> 1100	47	08.6	13.8	22.4		19.7	32.1
> 1250	53	09.8	15.6	25.5		22.3	36.4
> 1400	59	11.0	17.5	28.6		25.0	40.8
> 1550	66	12.1	19.4	31.6		27.7	45.2
> 1700	72	13.3	21.3	34.7		30.4	49.5
> 1850	79	14.5	23.2	37.7		33.1	53.9
> 2000	85	15.7	25.0	40.8		35.8	58.3
> 2150	91	16.8	26.9	43.9		38.4	62.7
> 2300	98	18.0	28.8	46.9		41.1	67.0
> 2450	104	19.2	30.7	50.0		43.8	71.4
> 2600	110	20.4	32.5	53.0		46.5	75.8
> 2750	117	21.5	34.4	56.1		49.2	80.1
> 2900	123	22.7	36.3	59.2		51.8	84.5
> 3050	129	23.9	38.2	62.2		54.5	88.9
> 3200	136	25.1	40.0	65.3		57.2	93.3
> 
> 
> That's for the 63 American, 195.6OHV, 26" tires, 3.77 axle,
> T-96 twin-stick. OD is .70.
> 
> If you don't mind splitting 2nd and 3rd with OD (would probably
> add only a "few" seconds to your 1/4 mile ET) you can pretend
> it's a 4-speed.
> 
> Note all that heavy breathing going on. CFM is total motor
> pumping assuming 75% VE. What's that, 1/4th of a small Edelbrock?
> 
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