Baron von Marlon
Member
I've found a Jag 2.88:1 LS Diff for reasonable money - does anyone have any practical experience of what impact this will have on the performance of a V8 P6 fitted with an LT77, please?
Plugging the numbers into the following link:
http://johnmaherracing.com/calculators/ ... alculator/
It drops 70 from 2400 to 2250 RPM, which will make cruising slightly easier, but will it have much of an impact on acceleration? I'm guessing not, purely by looking at the numbers, but so often theory is different to practice
I'm planning on using it with the 3.5 engine initially, with the ultimate goal being a 4.6, which is the rationale behind doing the swap in the first place. The 3.5 currently puts out extra torque with the 3.9 heads and cams, but will it be enough to cope with the lower ratio? I know that the 4.6 will have no problems whatsoever.
One last question - if upgrading to a 4.6, would it be worth upgrading the brakes? If that's the case, I might forego this particular diff, in favour of finding an XJS diff, complete with discs and calipers, instead.
Any advice welcomed - all my mechanical experience so far has consisted of fitting parts that were designed to fit the vehicle concerned
Cheers,
Martin
Plugging the numbers into the following link:
http://johnmaherracing.com/calculators/ ... alculator/
It drops 70 from 2400 to 2250 RPM, which will make cruising slightly easier, but will it have much of an impact on acceleration? I'm guessing not, purely by looking at the numbers, but so often theory is different to practice
I'm planning on using it with the 3.5 engine initially, with the ultimate goal being a 4.6, which is the rationale behind doing the swap in the first place. The 3.5 currently puts out extra torque with the 3.9 heads and cams, but will it be enough to cope with the lower ratio? I know that the 4.6 will have no problems whatsoever.
One last question - if upgrading to a 4.6, would it be worth upgrading the brakes? If that's the case, I might forego this particular diff, in favour of finding an XJS diff, complete with discs and calipers, instead.
Any advice welcomed - all my mechanical experience so far has consisted of fitting parts that were designed to fit the vehicle concerned
Cheers,
Martin