[QUOTE=retro_msport]And theres been some long length trumpets used to good effect in the past, hasn't there Graham
[QUOTE]
just a bit!
the shortest was no trumpet,
the longest i tried were 24inch's long, thats not the intake length, thats the trumpet, they gave the biggest and fattest spread of power i ever saw from my engine, the only trouble was if you went 3rpm past 6,300 it suddenly dropped 30 odd bhp
for the most part i used 17 inch as they gave the alround best, until i put in the 336 cam when i had to reduce them to a mere 15 inches long