yh stock nozzles stock cam there was a similar spec fabia but he was running firad 80s and a cam and he only got 279bhp gunna back that figure up on another dyno never really thought you could get past 240 on standard nozzles
Even at 40deg its really the max i would push. Even at 39/40deg its not very efficient as pcp are very high and you are risking pistons. I've got pictures somewhere where they have cracked after prolong use (25 to 30k).
with bigger nozzles you stay well under 39deg as more fuel means even higher pcp.
The trick is to keep the duration window low as possible therefore fit bigger nozzles. Pcp is just one consideration others would be egt, air charge temp, soi (another influence on pcp). You dont want to keep injecting fuel when the piston is on the way down.
Makes perfect sense I read an post on tdiclub about going past 39 degree about its just unburnt wasted fuel just causing heat looks like il get some bigger nozzles don't want to risk any damage
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