Originally Posted by
costina
55lbs run out of puff at 420bhp sounds like you need 83lbs.
Mine is on the limit at 421bhp at 2.3bar peak on a 34/48 with a afr of 12.5 on a standard engine.
Best get Tony to sort you out.
Didn't know 55's ran out of puff at 420bhp mate, would 83's run ok on a msd mapped 400bhp car? Future proofs mines then instead of swapping when I want to up the power.
I thought 55lbs where an alternative for Bosch greys but apparently they're good for 450bhp