Transmission Choices?

[jeffy]

I have a Richmond 5-speed Road Race in my ERA FIA with a 3.08 rear-end. This tranny has a 1:1 final. I originally wanted the Richmond Super Street 5-speed with overdrive, but learned from ERA that the shifter doesn't really fit in a Cobra: they said that the installation would sit very high and look like something more appropriate for Herman Munster!



I had thought about a 2.88 rear for a little better cruising RPM, but Rick Lake cautioned me that the stud-axles were a little weaker with that set-up, so I settled on the 3.08. Haven't had it on the road yet, but Jim Holden (who has had several ERAs) had this combo in his FIA and said it was perfect.

Jeff

[xb-60]

Originally Posted by jeffy

I have a Richmond 5-speed Road Race in my ERA FIA with a 3.08 rear-end. This tranny has a 1:1 final. I originally wanted the Richmond Super Street 5-speed with overdrive, but learned from ERA that the shifter doesn't really fit in a Cobra: they said that the installation would sit very high and look like something more appropriate for Herman Munster!



I had thought about a 2.88 rear for a little better cruising RPM, but Rick Lake cautioned me that the stud-axles were a little weaker with that set-up, so I settled on the 3.08. Haven't had it on the road yet, but Jim Holden (who has had several ERAs) had this combo in his FIA and said it was perfect.

Jeff

Going slightly sideways here...Jeff, does your Richmond RoadRace have 27/31 cluster (3.01 first gear) or 22/37 cluster (4.41 first gear)? These give overall ratios for first gear, with a 3.08 rear, of 9.27 and 13.58. (I'm trying to relate it to a WR Toploader with a 3.08 rear)
Isn't your car red, not black?
Glen

[jeffy]

Originally Posted by xb-60

Going slightly sideways here...Jeff, does your Richmond RoadRace have 27/31 cluster (3.01 first gear) or 22/37 cluster (4.41 first gear)? These give overall ratios for first gear, with a 3.08 rear, of 9.27 and 13.58. (I'm trying to relate it to a WR Toploader with a 3.08 rear)
Isn't your car red, not black?
Glen

I'm pretty sure it was the 22/37 cluster (which is for a Ford) with the 3.04 first gear.



Traveling today, tomorrow I can check for sure and give you the other ratios.

I had it repainted.

Jeff

[jeffy]

Glen and Larry-

Just in case you are interested, I chose the following gear ratios with my Richmond Road Race:

1st: 3.04
2nd: 2.13
3rd: 1.57
4th: 1.24
5th: 1:1

Rear-end is 3.07.

Jeff

[xb-60]

Originally Posted by jeffy

Glen and Larry-

Just in case you are interested, I chose the following gear ratios with my Richmond Road Race:

1st: 3.04
2nd: 2.13
3rd: 1.57
4th: 1.24
5th: 1:1

Rear-end is 3.07.

Jeff

Thanks Jeff.
I am thinking of the same rear end ration with a WR Toploader, so my first gear o/a would be 2.78 x 3.07 = 8.56 whereas yours is 3.04 x 3.07 = 9.33
Same ball park
Cheers,
Glen