Back in the Clan
Discussion
bobd said:
3:73 hydratrak diff - this is a must, boot lifter - momo steering wheel- paintshield - and some decent shocks at some stage and Dunlop Direzas for dry days- same as my T350 was specced.
Not wanting to start a diff fight but wouldn't 3.91 be a better bet if you're changing it? I looked at a gearing chart for a long time before deciding this BTW.Targarama said:
bobd said:
3:73 hydratrak diff - this is a must, boot lifter - momo steering wheel- paintshield - and some decent shocks at some stage and Dunlop Direzas for dry days- same as my T350 was specced.
Not wanting to start a diff fight but wouldn't 3.91 be a better bet if you're changing it? I looked at a gearing chart for a long time before deciding this BTW.
Do a search, there's a long thread on this.
IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
Targarama said:
Do a search, there's a long thread on this.
IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
First three ratios are changed Targ.IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
My sums. original at 7K = approx 189.
3,73 (Factory option I understand) = approx 176
3,91 at 7K = appox 163 and a grin like your head is about to fall off.
Daftlad said:
Targarama said:
Do a search, there's a long thread on this.
IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
First three ratios are changed Targ.IIRC the 'standard' Close Ratio gearbox has different first and second gears, but the same 3/4/5 as the normal gearbox - I'm sure others know more about this than me.
With the original diff the cars are geared for 196mph at 7,000rpm (I think I used 7,000 in my calculations). Anyway, these cars don't have enough power to pull this speed. Going 3.91 results in top end droppong to 176mph which I about right. You're now revving higher at the same speed in any gear, therefore fuel economy is slightly worse and motorway cruising means a bit more engine noise due to higher revs.
However, the important bit is that it makes the overall driving experience much better as the car is faster at any speed in any gear due to be further up the rev range - remember these engines product more power/torque up the revs. This kind of change probably wouldn't help a turbocharged car, but its perfect for the Speed Six.
My sums. original at 7K = approx 189.
3,73 (Factory option I understand) = approx 176
3,91 at 7K = appox 163 and a grin like your head is about to fall off.
As a comparison, and this is my personal experience from past modifications. The 3:43 diff is crap and reduces all the acceleration. Press cars always had a quick diff ( may have been removed prior to sale) 3:73 the norm for press cars. Next into the equation is the close ratio box. Taller first gear and less off the mark acceleration, but great on track and once you are in motion.
Best day to day is standard box and 3:73 diff. Press Tamora was ballistic as was my T350. After putting the close ratio gear set in the car was still ballistic, but not as quick off the mark.( read traction permitting) So the car I am getting already has C/R box, but 3:43 diff, so must be a pig from a standing start- hence my choice - for me from experience.
Targarama- I agree 3:91 is the dogs, but its not for me at this moment in time. Although who knows as the 4 litre has more torque than the 3.6 so I feel that in most situations the extra torque will assist in this instance.
Best day to day is standard box and 3:73 diff. Press Tamora was ballistic as was my T350. After putting the close ratio gear set in the car was still ballistic, but not as quick off the mark.( read traction permitting) So the car I am getting already has C/R box, but 3:43 diff, so must be a pig from a standing start- hence my choice - for me from experience.
Targarama- I agree 3:91 is the dogs, but its not for me at this moment in time. Although who knows as the 4 litre has more torque than the 3.6 so I feel that in most situations the extra torque will assist in this instance.
Gassing Station | Tamora, T350 & Sagaris | Top of Page | What's New | My Stuff