Rear end gearing tech question
Gear it to run out of Rs at 65 in second gear; you will be fast like lightning. This will be 5.56 gears.
Or gear it to top out at 60 in first. This will be 3.23s. These cruise at about 2740
Or gear for about 32=4000. This will be 4.30s in first. These cruise at about 3650
Or gear for 2250@65 in hi, or 2.94s
As you can see, for a streeter and a 904 there is no perfect gear to hit all the bases.
Just slap in some 3.23s and get rid of the 2400. To get 4.30 performance, with 3.23s, all you gotta do is pump up the torque to get moving. How much? 4.30/3.23= plus 33% Ima guessing that's about 50ftlbs, so a 3200 to 3000 should do it.
But if you already have the 2400 installed, well I would never tell you to rip it out without at least trying it, especially with 3.73s or 3.55s, lol. And the reason is this; 3.73s are up 15.5% in TM, while 3.55s are up 9.9%, both over 3.23s So that makes the torque deficit a little more bearable.Plus that cam is pretty torquey as is. I ran one like that and loved it. It made huge bottom-end torque at 10.9 Scr.It was a 295-burner with just a 9.44 starter gear.(3.55 x 2.66)
You will need the biggest tires you can fit in the back.
Here's something like mine (which I rev to 7000 all the time); You'll have a wee bit more on the bottom,there; and a lot more on the top, and peaking a little earlier,probably. If you plan to regularly visit the 6400 plus region, you need to do some oiling mods.
This curve was with an HE3037AL 230/237/110cam, NA of course.Here's the link.
#11---360 Dyno Test (Feb 2000)
Gear it to run out of Rs at 65 in second gear; you will be fast like lightning. This will be 5.56 gears.
Or gear it to top out at 60 in first. This will be 3.23s. These cruise at about 2740
Or gear for about 32=4000. This will be 4.30s in first. These cruise at about 3650
Or gear for 2250@65 in hi, or 2.94s
As you can see, for a streeter and a 904 there is no perfect gear to hit all the bases.
Just slap in some 3.23s and get rid of the 2400. To get 4.30 performance, with 3.23s, all you gotta do is pump up the torque to get moving. How much? 4.30/3.23= plus 33% Ima guessing that's about 50ftlbs, so a 3200 to 3000 should do it.
But if you already have the 2400 installed, well I would never tell you to rip it out without at least trying it, especially with 3.73s or 3.55s, lol. And the reason is this; 3.73s are up 15.5% in TM, while 3.55s are up 9.9%, both over 3.23s So that makes the torque deficit a little more bearable.Plus that cam is pretty torquey as is. I ran one like that and loved it. It made huge bottom-end torque at 10.9 Scr.It was a 295-burner with just a 9.44 starter gear.(3.55 x 2.66)
You will need the biggest tires you can fit in the back.
Here's something like mine (which I rev to 7000 all the time); You'll have a wee bit more on the bottom,there; and a lot more on the top, and peaking a little earlier,probably. If you plan to regularly visit the 6400 plus region, you need to do some oiling mods.
This curve was with an HE3037AL 230/237/110cam, NA of course.Here's the link.
#11---360 Dyno Test (Feb 2000)
