Hi Neil,
I'm also trying to weigh the diffent systems against each other and found the information given on SDB's website the most convincing.
The biggest gains will surely be achieved with modification on the induction side, complemented with a sports exhaust and a more free-flowing cat + ECU reprogramming. These modifications will already take you near the 200 BHP territory. Mild cams may free another 10 - 15 BHP.
My favorite kit is SBD's 214HP taper throttle kit with cams.
However, Jochen (numog) suggested the Cosworth system desinged for FWD applications. This system features only one (bigger) throttle body but long induction pipes for more torque.
He got me thinking with his advice because I now fear that I'll loose to much torque in the lower revs.
On the other hand he'll have to route the air intake around the rear end of the engine because the induction side of the FWD system faces towards the bulkhead. He'll probably modify the hood "TOK-style" to create a "ram-air-system".
I'd also appreciate comments on this matter.
Another throttle body set- up which is very well worth looking at is the one produced by Jenvey Dynamics ( especially the taper version which packages much better.)
http://www.jenvey.co.uk/ For general Duratec info, the Raceline site is also a useful source of comment:
http://www.raceline.co.uk/products/index.asp?categoryID=1So far as the routing around the rear of the engine is concerned, I've been looking carefully at this myself and my conclusion also is that since the best high pressure area is up against the bulkhead, then the inlet duct needs : (i) to be very close to that area and (2) the length of the duct itself needs to be kept as short as possible, so the 'Supersports cowl' idea may well be the way to go.
I priced the cost of obtaining a half- bonnet with a cowl from a well known Morgan sheet metal firm and the rough cost was about 430 GBP ( If I was happy to use the exisiting half bonnet with the cowl riveted on, then the price was much less
G
