Hi! I have a decision to make on my inlet manifold... I have throttle bodies with 90mm trumpets but the length of these means that I can't get my air box in the engine compartment and cutting the side of the bonnet is not something I want to do.. If I was able to change the trumpet length to 40-45mm then I would be able to fit the airbox and route the pickup in front of the radiator... The throttle bodies I have are 48mm diameter so will reducing the length make that much difference to the performance? Engine is an ST170 with a DTA ECU.

thanks
Dave B

www.jenvey.co.uk -> FAQ
There are some nice infos regarding this topic. I decided for myself that a 90mm inlet manifold would be perfect for my engine (zetec on 45s tbs).

[Edited on 2/10/10 by budha]