Originally Posted by No2fast

Hi,
I hit 21 PSI today. Check light went on. your ecu will adjust over time and the check eng light will only come on once in a while
This really scares me. DTK 62mm sc pulley, tighed1īs DIY wrap kit and gatorback belt. DTK tune and TCU, rev limiter 6700. 20 to 21 lbs of boost ,,remember u r only there for a few seconds
Didn`t expect boost pressure that high.
Fortunately we have 102 octane pump gas here in Germany (about 95 US equivalent). the 100 oct fuel is good in the U S i was running 21 psi on 93 oct
What do you guys think is a safe AFR at this level on 95 pump gas and what not :-) ? Can the engine (rods, bearings) take that level of boost for a long time?
I probabely have to change SC pulley back to 65 mm. Very soon. do you have stacked pulleys if yes what pulley is on the crank,,,178 and 65 or 62 on sc is what most stacked are running

Steven