with stock cat and 80mm single i get 8-9.4lbs boost

 

when I had stock cat and stock exhaust, i was seeing 7.5ish...

 

interesting...
I know AP2's have a larger occurrence of spikes and creep.
I see ZERO spikes also but it never goes past 7 pounds on my gauge...

 

define spike for me.

when its boost related.

 

When it hits nine really quick then drops down and levels out to seven and a half. Just "spiking" and then leveling out.

Were you seeing these higher boost levels from 4K to 9K continuously??

 

not from 4 to nine, more like 5,600 to about 8. (AP2)

 

Mine hits 7 at 4K and holds perfectly still to 9K. AP1/stock cat/70 single

 

WOT correct?

mine climbs to 9.5 around 5,500 and stays there until I let off the gas (8k)...

 

Wot or even half throttle, its the same in my car. (at or slightly after 4K RPM).


Before I was boosting 6PSI with stock cat and exhaust, so the exhaust added 1 PSI. I bet the test pipe would add another two or three just because the stock cat is pretty restrictive.

 

Cool... I haven't tried a half throttle when I got that high on the RPM chart.