on a 2.6" pulley. Why? eaton m45


01' Z24 5 speed
422whp/400wtq
T4 Turbocharged
Built LD9
HP Tuners

maybe you need a differant belt. And because your exhaust flows so good you might lose a little pressure there

2.25" exhaust with a high flow cat and a tsudo 4-1 header. could it be the belt? its kinda tight on there.


01' Z24 5 speed
422whp/400wtq
T4 Turbocharged
Built LD9
HP Tuners

the belt being tight would be better...

i get 7 PSI on the 2.6", most of the time, depending on conditions, otherwise its 6. like he said, since you have a full exhaust you may lose some pressure (RESISTANCE TO FLOW) which is what you want.


2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero

there are a number of reasons why your only seeing that much boost... main reason is most likely going to be your boost gauge is slightly off.. there is no gauge that is going to be deadly accurate.. on average they are out about 10% +/-

I know even my Stuart Warner (which i think are a much better gauge then auto meter) is out approx 1 to 1.5psi less then what the actual boost pressure is

then there is your flow, maybe you have slightly better flow then person "X" who your comparing your boost levels to, maybe the elevation or weather is different from where you are.. there is so much that can effect what you see for boost... and even though your seeing 6psi.. you could still be making more power then some one seeing 7 or 8psi



The First Twin Charged jbody
blue car (R.I.P) - 240whp @7psi..
silver car - 305whp 315lbs.tq @15psi (91 Octane) or 420whp & 425lbs.TQ @20psi (94 octane+Alcohol Injection)
All dynos run on a Mustang dyno