Rwd Duretec install what gear box
Discussion
Type 9 will need a custom bell housing (readily available from places like retroford/westfield/caterham as the bold pattern on the duratec is different to the previous 50 years of ford engines. You will also need a beefed up Type 9 from somewhere like BGH as the standard doesn't do much over 180hp and the duretec I guess may be knocking on that. Finally on the Type 9 the first gear is very short and has a wide gap to 2nd so if you are going down that route then a long first heavy duty type 9 is the one to have (or possibly the 2.8 Capri version if you can find one). For the Duratec this is not a cheap option, I'd budget about £1k for it.
There is also the T5 to consider (as in 2wd cosworth and TV use them) pretty bullet proof and designed for higher HP. Still needs a bellhousing but gear ratios and strength are pretty good.
Sorry, no info about the MX5 but there have been plenty used with supercharged and turbo'd MX5s running 200HP+ so looks pretty good on paper. Just need to sort out the bell hosing or adapter plate.
There is also the T5 to consider (as in 2wd cosworth and TV use them) pretty bullet proof and designed for higher HP. Still needs a bellhousing but gear ratios and strength are pretty good.
Sorry, no info about the MX5 but there have been plenty used with supercharged and turbo'd MX5s running 200HP+ so looks pretty good on paper. Just need to sort out the bell hosing or adapter plate.
ugg10 said:
IIRC the Mk3 MX5 has a version of the duratec in it so the latest 6 speed gearbox may fit straight on but don't quote me on that.
Yes you are very correct, the box will bolt straight on, however it will be tilted over by about 10 degrees if you are using the box if the engine is to be upright. Mazda warrant the gearboxes to be tilted by this amount so it is ok to do that...just means you will need to put a bend in the gear lever.As already commented on, you will probably need to use the 5 speed box, as the 6 speed wont go in the chassis of a conventional car.
Edited by JontyR on Wednesday 11th December 10:22
Thanks for the feed back. I was thinking of using the I4 Duratec hopefully achieving around 200bhp. As others have mentions the cost of a bell housing, fly wheel, clutch and type 9 is around 1k, this would seam to be the same sort of cost as using the 6 speed NC box.
http://www.turbosport.co.uk/showthread.php?t=12950...
This interesting build thread shows the box in a car you can see the angle. I guess as the cost are similar it comes down to finding the box that has the better ratios.
http://www.turbosport.co.uk/showthread.php?t=12950...
This interesting build thread shows the box in a car you can see the angle. I guess as the cost are similar it comes down to finding the box that has the better ratios.
You'll get a used one by looking in PH Classifieds (parts) or in the for sale section of www.blatchat.com - you can contact people via PM on Blatchat without being a member.
All of Caterham's currenbt top end cars (R300/400/R500/R620) use the Duratec, and the Caterham 6 speed is the same form factor as a type 9, so any bellhousing that firs a type 0 will fit a Duratec.
Be aware the Cateham box coms with a long nosed input shaft (1.4 K-Series) and a short nose. The long nose ones are harder to find though you can get one from Road and Race Transmissions in Kent - Phil Stewart , Filston Farm, Filston Lane, Sevenoaks, Kent TN14 5JU 01959 525105
All of Caterham's currenbt top end cars (R300/400/R500/R620) use the Duratec, and the Caterham 6 speed is the same form factor as a type 9, so any bellhousing that firs a type 0 will fit a Duratec.
Be aware the Cateham box coms with a long nosed input shaft (1.4 K-Series) and a short nose. The long nose ones are harder to find though you can get one from Road and Race Transmissions in Kent - Phil Stewart , Filston Farm, Filston Lane, Sevenoaks, Kent TN14 5JU 01959 525105
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