Quaife Speed Calculator Download
It is a M32 gearbox normaly used in Astra/Zafira 2.0 Turbo. The gear ratios depend on the engine it was used with (Z20LEL or Z20LER).The Astra 2.0 Turbo driveshafts will fit the speedster/VX. The transmission blot pattern will only fit the 2.0 VXT engine not the 2.2possible ratios:170 PS Z20LEL: 1st 3,818 2nd 2,053 3rd 1,302 4th 0,959 5th 0,744 6th 0,614 final drive 3,65200 PS Z20LER: 1st 3,818 2nd 2,158 3rd 1,475 4th 1,067 5th 0,875 6th 0,744 final drive 3,65Edited by jaggeler, 11 July 2006 - 07:26 AM. 1st to 5th are pretty much the same as the gear ratios in the VXT. 6th is effectively an extra overdrive ratio with the engine only doing approx 3000rpm at 90mph. If it's the same as the 6 speed box in my car, it is a bit notchy compared with the F23 and doesn't like very fast gearchanges.
Quaife Transmission
Perhaps they've improved it for the Astra fitment.You'd need to fit a lower final drive, 3.85 or even 4.1 to get any benefit in acceleration from this gearbox. Or a very powerful engine to make use of the theoretical 190mph top speed with the standard final drive.PS Note to self (I should read the previous post properly before posting ) The LER ratios are shorter than the VXT ratios, so that one is a good halfway house between the standard ratios and a close ratio box. Gear ratios in the F28 box look even better than the LER box - giving an 'extra' gear between 2nd and 4th.
Speed Calculator Gear Ratio
Read off your mph at any rpm in any gear. Enter transmission and rear tyre data in the yellow boxes. Tyre diameter is automatically calculated from tyre profile info e.g.
195/55 x 15 = 24.44 inch tyre diameter.This chart is particularly useful when used in conjunction with an engine’s power and torque data – showing what the rpm drop is in each gear when shifted at a specific engine rpm. For example, the default figures in the chart are for a stock ratio transmission as fitted to a Type 1, 1303S (3.88 ring and pinion).Shifting at 5000rpm from 3rd gear into 4th (76mph), sees engine speed drop by almost 1500rpm, to a little over 3500rpm. If your dyno data shows the engine is making good torque after the gearshift and subsequent drop in rpm, acceleration in 4th gear will be strong. For maximum acceleration, as required in a drag race application, best track performance is found by keeping the engine between peak torque and a little after peak power in each gear.