Mopar92
Well-Known Member
The 2.94 is a decent gear really. Just don’t expect to outrun much. Ha
2.94 gears with a four speed.
- Thread starter cpearce
- Start date
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I have 380hp create 5.9 with 2800 stall and 727 with those gears. The engine is a bit soft under 2000 rpm but It liveable and still fun. Have to get up to 40 mph in 1st then hammer it to really get into the powerband.
Got to drive in 2nd in town inder 40 mph or it lugs. Imagine with a 408 (that would be like me runnimg 3.55) and a 4 gear would be a lot better.
I only have 1250 lbs-ft to the ground.
360 with 425 lbs-ft x 2.94 = 1250 lbs-ft
I would have to step up to 3.55 to match what you got with 2.94.
360 with 425 lbs-ft x 3.55 = 1509 lbs-ft
408 with 500 lbs-ft x 2.94 = 1470 lbs-ft
Thats the main reason to build a 408 can get away with running way less gear and still be putting a lot of power to the ground.
If you ran 3.55 I'd have to run 4.10 to match you.
Got to drive in 2nd in town inder 40 mph or it lugs. Imagine with a 408 (that would be like me runnimg 3.55) and a 4 gear would be a lot better.
I only have 1250 lbs-ft to the ground.
360 with 425 lbs-ft x 2.94 = 1250 lbs-ft
I would have to step up to 3.55 to match what you got with 2.94.
360 with 425 lbs-ft x 3.55 = 1509 lbs-ft
408 with 500 lbs-ft x 2.94 = 1470 lbs-ft
Thats the main reason to build a 408 can get away with running way less gear and still be putting a lot of power to the ground.
If you ran 3.55 I'd have to run 4.10 to match you.
Yes, very well behaved in first. Certainly not a Prius, but very civilized. This is the 408 yes.
My cam will be a little more aggressive...I was a bit surprised with the custom grind that was ordered but he knew my application and I trust he knows his stuff. And I will be running 3.91s and a 3.09 1st with 26ish tall tires.
That will be fine, I have 28" tires and "currently" 3.55 gears. As it is I can vaporize the tires at any speed until top end of third. Your setup will pull hard. My reasoning for the 2.94 gears is a couple of 400 mile trips planned for season. For local running around and strip time the 3.55 gears will go back in. A word of caution, even 3.55 gears with the 3.09 transmission, first gear is over very quickly. Get a rev limiter.
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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My 360 likes the 3.09x3.23=9.98 starter gear, very nice. But I have overdrive. and the 3.55s hit more targets, so they're staying..
Congrats on getting back safely.
Keep it shinny side up
Congrats on getting back safely.
Keep it shinny side up
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
- Joined
- Jan 19, 2014
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- 24,898
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I know you didn't ask me but,just
FYI
I run a 230/237 @.050 in a 10.9Scr Eddie-headed 367, with a 10.97 starter gear. I can drag the idle down to 550 with a 750DP, in 3.09 lowgear before the bucking starts. That's 4mph for my combo. But I have to retard the timing to 5* advanced to soften the power pulses, to do that; with the Jacob's electronic retarder. After that I have to put a toe on the CenterForce. But I can get her down to about 3mph on a hard level flat surface, slipping the clutch,to ease the bucking. She won't stay running at 550 with any less than 5* thru the 750. Now the TQ I had...........
Taking off with a 10.97 starter gear is almost a dump it and go deal with my heavy flywheel. She has spent many many hours on the low-speed circuits.
My idle timing is 12 to14, power is 28*@2800 and 32/34 @3200/3400, on any given day, and bonus- it burns 87E10 full-time.
BTW,3to4mph would be impossible with the Vcan hooked to manifold vacuum.I'd be riding a bronco,and dragging the brakes,and slipping the clutch; at probably 5to6.
Hope you find this useful
I always find your posts informative AJ. Thanks for directing me towards the 3.09 box. I like it so much I even bought a spare.
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