3800 wow check out my scan...

[phat_ridegt]

i just got the 2.8 tuned it last night completly. zzp tuned for the 3.0 and i just used a 2.2 to get it just right for the 2.8. when i put the 2.8 on it saw like 4-5*kr. now after adjusting fuel its 0*. the 3 blips of knock on this scan are now gone after messing with it one more time but i didnt log that scan.

anywayz, look at the boost, max is like 13.19 but it seems to start at like 10 then 11 then 12, then drops down then back up, is that normal or is that the belt slipping? i have a zzp belt and oversized tensioner.

http://www.scandepot.net/viewscan.php?pk=1894

Click to read more...

 

[syP]

Try a belt size down... or get the s/c idler that Ron Vogel makes

 

[phat_ridegt]

does it look like slippage?

 

[syP]

Yes because as the RPM's raise.. the supercharger spins faster and faster... boost doesnt cut off in our cars... unless there is slippage

 

[phat_ridegt]

hmm maybe ill try rons solution.

the same thing was happening when i ran a 3.2.....

 

[syP]

how loose is the belt when you sqeeze it?

 

[phat_ridegt]

its not. it seems very tight. maybe i should try a whole new tensioner. with 85k it wouldnt be the first one to go out

 

[phat_ridegt]

anyone? does the timing/o2's seem alright. i was under the ASSumption that my timing around 18-20 makes up for the high o2's???

 

[GTPPWR]

what is your afc at? it does sound like slippage, mine did that with a 3.25...went from 10 to 14 back to 12 and then 16 all throughout the rpm range. a good way to tell is your coolant tank. see any black dust on it? anyway I'd opt for a new tensioner, oversized tensioner pulley, and Ron's mod.

your o2's could be a bit better.