4.4FD 8400rpm vs 4.785FD 9000rpm

[jugbugz]

Ok, I was playing around with Mfactory's calculator just to see where my setup was at compared to stock and also get some ideas for future mods to my gearbox.

As I input 4.4FD 8400rpm vs 4.785FD 9000rpm, I noticed that top speed had recovered a fair bit to compensate for the loss of top speed from the 4.785FD.

I mean, most of us have 9000rpm from generic/custom ECUs etc.

1. So, what does that graph tell us exactly?

2. Does the gap between the 2 lines mean the amount of acceleration we gained?

3. More power band? The Pink line I drew is at 6000rpm so we can see the difference in top end.

Mfactory?

 

[MFactory]

Yes, by increasing your revs, you can basically "recover" back the lost top speed when you switch to a shorter final.

The graph is basically used as a tool to determine the speed of the vehicle at a certain rpm, and can be used to compare 2 different gearing setups side-by-side.

With regards to powerband, the graph does not show this as you can only calculate this in conjunction with a base run. This is actually a feature we are working on for the future though

You can actually view a pre-made graph of gearing vs power comparisons on our Final Drive and Close Gear product pages.

 

[jugbugz]

Yeh, since we're always used to looking at dyno graphs... this graph messes up my head a bit when I start to think about it.

I guess, as long as you have 9000rpm, then shortening your higher gears wouldnt affect so much after all.