Longer 5th gear - Q4 gearbox

[Alfa Patch]

Hi Guys

Dave - did you find anywhere cheaper? I am keen to do this whilst the box is out of my car at the moment.

I am surprised more people havent done this? My car is standard and still has more power than it does gears, anyone with more power must have deft throttle control in order to cruise at motorway speeds.

[Q4-Dave]

Hi Guys

Dave - did you find anywhere cheaper? I am keen to do this whilst the box is out of my car at the moment.

Hi

I have not come around to order these yet, have so many things on the to-do-list that the money seems to run straight through my wallet
and this is not a high priority right now..
anyone else found a better price somewhere?

Steve maybe this would be an item for the Shop, it is a good (and easy) mod and as Alfa Patch says, even standard the car revs a bit too high on highway-speeds!?

[Alfa Patch]

Looking forward to hearing the results of this. Ive now driven the car enough to get annoyed with its low cruising speed again.

Unfortunately there are probably more Q4's than turbo diesels in the UK. Finding a 2.5 gearbox will be fun to say the least!

[mpampis_]

Enrico has already in his product a shorter ratio. Crown and pinion for making all gears shorter
http://scara73.it/motore/motor14.html
Look at the second picture

[mpampis_]

today it was the first ride with my "new" car and i will tell you my opinion about 155 2.5 TD gears. it is a bit tiring at short trips because i need at least 4,5k rpm with 4th gear to change in 5th. i had almost 150 km/h with 4.1k rpm . for a long trip to national roads it is the perfect choice in my opinion

[corriedw]

Gear ratio formula:

MPH = RPM/GEAR RATIO x WHEEL DIA/335

wHeel dia in inCHes
gear ratio = ratio gear x ratio diff

(sorry for HIGHER Case letters, on tHis forum my H,C,V do not work in lower Case)

[mpampis_]

Thanks for that ecuation. I guess wheel diam. Includes the tyre profile too so you mean full wheel cycle

[corriedw]

Yes measure thread to thread(front to back)