boost????

[silver03cobra]

so I have an 03 with a ported blower,tb,plem. with a 2.82 pulley. I thought I should have 15 lbs of boost. On my buddys autometer it showed 14.5 now I have my autometer gauge on it... it shows 11 ish. What should I have for psi? I did put mine in a dif. spot. Could that be it? or do you think my gauge is messed up?
Thanks guys...

[fazm]

is it a vacuum/boost gauge?

if so, what does vacuum read at idle, and what does the gauge read when the car is off.

[4Jenna]

Where its pulling the source from is also very important, if you have it in a diff spot then yes it would likely read lower/higher.


Gauges go bad aswell.

[AZSonicSnake]

with my pully combo i am suppose to have 14, but do to this wonderful thing called belt slip, i only run about 11.5. i can't wait to get a billetflow non-slip pulley. oh, and my automemter guage agrees with the dyno that 11.5 is all i am getting.

[silver03cobra]

is it a vacuum/boost gauge?

if so, what does vacuum read at idle, and what does the gauge read when the car is off.
20 lbs at idle...... when its off 0lbs...

[silver03cobra]

with my pully combo i am suppose to have 14, but do to this wonderful thing called belt slip, i only run about 11.5. i can't wait to get a billetflow non-slip pulley. oh, and my automemter guage agrees with the dyno that 11.5 is all i am getting.
no belt slip!:laughing1:

[fazm]

20 lbs at idle...... when its off 0lbs...
20 inches i assume u mean.

sounds like the gauge is working.

going to be location, or belt slip

[AZSonicSnake]

no belt slip!:laughing1:

are you sure? i did not think i had any, but after watching the boost pres. and seein the dyno graph, i knew i had some. but was not worried, since my 450rwhp with a 2.80 and an unported eaton has been rather enjoyable. just decided that i would get the billet flow when i got my ported blower. which i will have soon. 500 here we come! :bouncy:

[silver03cobra]

are you sure? i did not think i had any, but after watching the boost pres. and seein the dyno graph, i knew i had some. but was not worried, since my 450rwhp with a 2.80 and an unported eaton has been rather enjoyable. just decided that i would get the billet flow when i got my ported blower. which i will have soon. 500 here we come! :bouncy:

http://www.highperformancestangs.com/forums/showthread.php?t=2473

before i put the bad ass tight belt on

[ASUSMC]

Trust me the belt could still be slipping. My procharger had a belt that was an absolute BITCH to put on and I had some pretty badass slippage.

Also remember its summer, their is less air to go around so you aren't going to be reading the same boost at 110* vs 75*

[silver03cobra]

yea.... but when you watch the gauge it hits 11.5 and holds untill 6300 the goes to 9.5

[4Jenna]

Sounds like some slippy slip

[MinGry03]

Either belt slip, vacuum leak or bad gauge.

Problem: Vacuum leak.

The vacuum leak would make the gauge not work correctly but your blower would still produce the correct amount of boost.

Fix: Just check all lines to ensure a proper connection. Then test with a vacuum tester to see if it holds.

Problem: Belt Slip

Belt slip would make the gauge show an amount of boost that it is currently making +/-. The belt slip would not produce the correct amount of boost that the pulley is made to make.

Fix: Add an auxiliary pulley and or change the belt / belt size.

Problem: Gauges

A bad gauge is just a bad gauge. try your friends again just to eliminate the easy problem first.

Fix: Get a new gauge.

[Lucafu1]

also altitude. i dropped 3 psi moving from 280ft to 3k feet or whatever it is here =(

get a bigger crank pulley =)

[silver03cobra]

i want to.... 2lbs maybe 4?

[Lucafu1]

i ran a 2.76 upper and 2LB lower for the longest. i am now moving up to a 4lb lower and with a good exhaust i hope this combo will be good for me. i would go with a 2lb lower IMO unless you plan on long tubes. oh yeah a port will drop boost alittle imo.

[AZSonicSnake]

2.76 upper and 2lb lower....hmmm...sounds like what i am doing. thanks to a hookup from a cool dude in tucson on the lower. :twothumbsup:

[Lucafu1]

2.76 upper and 2lb lower....hmmm...sounds like what i am doing. thanks to a hookup from a cool dude in tucson on the lower. :twothumbsup:

no problem man! now get that ported blower and install that lower and youll have a sick setup:pepper:

[AZSonicSnake]

oh yea. ordering up the blower this week. :biglaugh:

[silver03cobra]

yea i wish i could have got a great deal on a lower!