. Try sending him a U2U, he can definitely help.
It is the straight four duratec youre talking about right? I'm not sure youll necessarily definitely have to fit an aftermarket box..
I'm planning on building a kitcar with a recent Duratec engine + MT75 gearbox.
Some time ago someone mentioned you should need a "HD" type of gearbox. I tried to find the post with the search, but I can't find it
back. What is this "HD" gearbox or are there more RWD gearboxes that can withstand the power of a throttle bodied Duratec ? (perhaps Mazda
MX-5 gearbox ?)
where is flak monkey when you need him .
Try sending him a U2U, he can definitely help.
It is the straight four duratec youre talking about right? I'm not sure youll necessarily definitely have to fit an aftermarket box..
HD = Heavy Duty
Not all HD boxes are the same mind. Have a look on BGH or Quaife's site.
I'm sure the bolt pattern is wrong for an MT75, you need a Type 9's and a new bellhousing.
Rally Design amongst others? sell the bell housing to connect to a type 9 box to a Duratech engine . BGH geartech sell uprated type 9 boxes
You'll struggle mating an MT75 to a duratec as the bolt pattern is wrong and the bellhousing is integral on the MT75.
You will need a type 9 box in good condition at the very least. I have decided to go for a heavy duty one as I dont want to be changing the box every
year. Most installs using the std type 9 rarely see a genuine 200bhp. Also bear in mind that you really want a longer first gear ratio as well and
opting for a HD gear kit is the ideal way to do it.
Bellhousings for the type 9 are about £200+vat from rally design, Burton Power, SBDev and Raceline to name but a few.
The MX5 box will fit as well, BUT it needs to be from the new shape MX5 as the old shape is not compatable. Also they are quite a large box, much
bigger than a T9
David
[Edited on 16/5/09 by flak monkey]
There is the "MT75c" gearbox...basically someone's made a non-integrated version of the MT75 so you can have the stronger gear set of an MT75 with the adaptability of a non-integrated bellhousing. Very nice looking piece of kit, but not cheap...
quote:
Originally posted by flak monkey
You'll struggle mating an MT75 to a duratec as the bolt pattern is wrong and the bellhousing is integral on the MT75.
You will need a type 9 box in good condition at the very least. I have decided to go for a heavy duty one as I dont want to be changing the box every year. Most installs using the std type 9 rarely see a genuine 200bhp. Also bear in mind that you really want a longer first gear ratio as well and opting for a HD gear kit is the ideal way to do it.
Bellhousings for the type 9 are about £200+vat from rally design, Burton Power, SBDev and Raceline to name but a few.
The MX5 box will fit as well, BUT it needs to be from the new shape MX5 as the old shape is not compatable. Also they are quite a large box, much bigger than a T9
If you've ever driven a car with standard type 9 ratios, then you know why....
quote:
Originally posted by Breaker
Sorry for my ignorance, but why should you need a longer first gear ?
I believe the HD just refers to the size of the bearings in the box. I'm sure someone will confirm/correct me on this so a HD box from Ford would
have been fitted to a V6 or diesel?
The BGH gearboxes have uprated bearings and improved oiling. optionally they uprate the selector mechanism and synchro/baulk rings. I don't think
they fit super strong gears when they uprate them as isn't 4th part of the shaft so can't be changed easily/cheaply?
For example the Tran-X uprated box with dog engagement and strengthed gear material is £2650+ VAT !!
1st gear on an MT75 ( 3.9)is worse than the Type 9 (3.6) Type 9 V6 box is better at 3.3 (3.6 for MT75)
BGH now do a heavy duty box based on the V6 gearset with a choice of 1st gears from 2.8 through to 2.2 ish
I know you will have more revs with a Duratec but the much longer 1st is the way to go with the wheel, tyre, diff ratio, first gear ratio sorted to
give about 45 in first and over 60 in second.
This will transform the driving experience.
Usualy with the type 9/MT75 you are juggling a wide ratio box so if you get the lower gears sorted your 4th gear speed is very high and 5th stupid.
You can also get a lower 5th gear about 0.9
quote:
Originally posted by bimbleuk
I believe the HD just refers to the size of the bearings in the box. I'm sure someone will confirm/correct me on this so a HD box from Ford would have been fitted to a V6 or diesel?
The BGH gearboxes have uprated bearings and improved oiling. optionally they uprate the selector mechanism and synchro/baulk rings. I don't think they fit super strong gears when they uprate them as isn't 4th part of the shaft so can't be changed easily/cheaply?
For example the Tran-X uprated box with dog engagement and strengthed gear material is £2650+ VAT !!