So i now have the Vortech v2 t trim before i had the si trim on the 2.87 pulley laying down a good 430whp no that i have put the t trim on im making 300whp how the heck did i loose all that power when all i changed was the blower
mods
ipp 8.8:1 block
stock heads
Brian crower stage 2 cams
ID725cc injectors
Kinetix Race Manifold
Pmas
aam fuel rails
aam return
walbro 255pump
Uprev tune
2.87 pulley 32 cog and whatever the stock cog on the blower
Mishimoto FMIC 30x12x3.5"
berk test pipes
greddy exhuast
1 step colder plug

 

Are you making boost? Check all your couplers, you may have a loose one.

 

yes it hits 7.81psi i holds it till redline

 

You should be making alot more boost than that, like 14-15psi. Double check your couplers. I bet that is the issue. Also it could be belt slip.

 

i have the extra pulleys for the tension and the couplers are all tight with new clamps, do you think the cogs need to be changed?

 

NO!

You have a Boost Leak, or Belt Slip........

 

not sure if you should own such a setup with comments like "hits 7.81psi and holds it to redline"

find your leak/slip, fix it.

 

lol for real.

 

hey i was going off the dyno sheet for psi.. im not that big of an ******* about it

 

can you post the dyno sheet?

 

Make sure you still have all your teeth left on the cog belt as well. As OldManZ350 said post up a pic of your dyno graph as well if you can.

 

^Agree check your set-up throughly! I have the SI v2 with a stock 3.33 pulley and im making 11psi.

Like Ice Cube says, "Check yourself before you wreck yourself!!"

 

belt slip

 

no clue about FI but i bet these guys know there **** so im gonna say belt slip to sound smart

 

but for real OP you def have belt slip or leak someplace. how much boost were you making before?

 

i concur....super chargers don't "hold boost". Max boost is at max rpm. It should always be climbing and linear.

 

Ya ill get the sheet up on here it's weird as **** I've never seen it do this before it hits good boost to like 4k then flatline even the tuner was a little baffled..

 

I wouldn't be baffled. It's not holding pressure somewhere or the belt is slipping. Check belt first the look for boost leaks second. Should be a simple fix once you find it.

 

FWIW, did you ever push on the valve in the BPV? if so, that ruins it and it could easily not be holding boost. Has to be sent back to vortech for rebuild.

Sounds like nothing was touched though besides just charger swap. If your idle vacuum hasnt changed, then the leak must be between the tb and the supercharger outlet.

 

Ya I took the valve over to Vortech and dropped it off for a rebuild they said if that doesn't fix it to maybe try the mondo valve and ya the vacuum is exactly the same so I'll recheck the belt