Hi All

I've purchased a couple of k&n bolt on filters for my newly fitted dellorto 40's, do i have to have ram pipes as well as filters?

Cheers
Leon

if you want more low down power fit long trumpets or if you want more top end power fit short trumpets its your call hope that helps a wee bit cheers Paul

Or do what the do on many bike engines. Have 2 shorter ones on 1 and 4 cylinder and 2 longer ones on 2 and 3 cylinder. Helps balance out the available torque.

To run a pair of webers or Dellortos without trumpets is like eating a cheese sandwich but without the cheese!!
Length and diameter does make a difference and running without any is worse as it corrupts the airflow over the aux venturi. This make for a difficult car to calibrate the fueling on cruise and very low throttle openings.
Hope this helps

Cheers men, some usefull info there.

Has anyone got some basic jet sizes to get the engine running, its on a 1660 crossflow.

This shoud help you.


http://7faq.com/owbase/ow.asp?HowDoI%2FTuneWeberCarburettors

Here's some flow information, on my 45's I replaced open 60mm trumpets with 75mm K&N's, and 16mm trumpets, 0.5 bhp difference max on the dyno.
Rescued attachment trumpet design.JPG

Any idea where i can get ram pipes for a decent price?

Cheers again!

No such thing I'm afraid, I bought 4 used off here for £25, then had to buy the other 2 new, £11 each didn't seem bad untill P&P and VAT was added, just over £30.