i currently have 3.55s and im debating if i should go with a 3.08? my car is a DD and it has 620rwhp..what are your thoughts/opinions?
i currently have 3.55s and im debating if i should go with a 3.08? my car is a DD and it has 620rwhp..what are your thoughts/opinions?
im just looking for better gas mileage!
im getting 17-19 city (out of boost) 25 hwy
I believe C6Zs come with 3.27s and Vipers come with 3.08s. I don't know of anyone with a Cobra that has tried 3.08s, but I'd imagine with your HP level it shouldn't bog off the line. You will definitely get much better traction and have longer gears which is great for the street. 0-60 in 1st gear will be a good time I'm sure!
Someone needs to compute the speeds. When power goes up even only to 500 1st gear is WAY to short and 5/6th gear... well they aren't really that much of an over drive to start with. I absolutely hate the ratios the 03 cobras came with.
Gear MPH
1st 61.7
2nd 92.1
3rd 126.2
4th 164.0
5th 205.0
6th 260.4
Axle ratio 3.08 and RPM@6500
Tire size was 295/35/18
One thought I had since these "higher rear gear" threads have come up. Our cars are known to have a very tight piston to wall clearance, hence the no boosting in 5th and 6th gear. These gears really lug the motor and generate alot of heat because of it. Lowering to the 3.27 or 3.08 gears, wouldnt this cause the same now to happen in say 4th or 3rd if you dont pull 2nd all the way to the top? Maybe not so much 3rd, but def. 4th gear? I may be way off my rocker or nuts for thinking this but figured I would ask. Granted these would only be a concern with stock motors with stock pistons/wall etc with no mods. Any thoughts on this guys?
It would be more stressful than a stock geared 4th gear pull but not as bad as 5th/6th. Those overdrive gears do not stress the engine because of the additional time in the gear but rather because of the additional stress it causes to "chug" on the engine from overdriving it (each rev not creating 1 rev at the tailshaft of the trans. This stress finds the weak point in the engine. I.e. Piston to wall clearance. I quoted this from a tuner hope this helps.
It would be more stressful than a stock geared 4th gear pull but not as bad as 5th/6th. Those overdrive gears do not stress the engine because of the additional time in the gear but rather because of the additional stress it causes to "chug" on the engine from overdriving it (each rev not creating 1 rev at the tailshaft of the trans. This stress finds the weak point in the engine. I.e. Piston to wall clearance. I quoted this from a tuner hope this helps.