What do you think of these gears with a 4.9 fd.



Final Gear 4.900................RPM(shiftpoint..............MPH.............RPM Drop

1st Gear Ratio 3.230............9,000..........................39.66

2nd Gear Ratio 2.105............9,000...........................60.86...............5,865

3rd Gear Ratio 1.458............9,000...........................87.87................6,234

4th Gear Ratio 1.107............9,000..........................115.73...............6,833

5th Gear Ratio 0.848............9,000..........................151.07................6,894

 

that'll give you nice acceleration but your cruising rpm's are going to suck

play around with this gear ratio calculator: http://www.fatboyraceworks.com/gears/

 

I cant seem to find any info for a ukdm s9b gearbox

Dose anyone know of any websites that list the ukdm s9b gear ratios.
Because i am not sure if it has the 4.2 or the 4.4 FD(or it might have something els) some people say it is 4.2 and some say its 4.4

Any info will be most gratefull.

 

tell me this. what is your cruising rpm at 128kmh?

 

I dont know because the s9b box came with the b18c4 which is standard.
The on in my car at the moment is a y21 and i know what the ratios are.

And how was you going to work out the ratios?

 

128kmh = ~80mph. with my gsr tranny im at 4krpm @80mph. so if you were close to that it'd be safe to say the tranny's would be similar.

 

After hours and hours of searching i have found this http://joooe.webhs.org/vti/specs.html

And it had to be rubbish news i have got a 4.266FD