over sized crankpully not working

[clean82]

doing the vac line mod isn't going to be enough to hold the ABV closed, the ABV will still leak a little boost. when installing a nevo the best thing to do is take it off and block it up

I stand corrected - Rep point for Wiso

[mullett]

yeah, basically what Wiso said. I played with that, just for the sake of it. Doing the VSV mod allowed me to run about 9-10psi, but it fluctuated all over the place. Removing the thing and capping it ran 10-11 psi (165mm crank pulley), and it was much more linear. If the car isn't making as much power as you think it should, get it to a dyno and check your A/F ratios. Not sure about MAP GZEs, but mine is running extremely rich, a JayCar fuel/air adjuster is in the works now to cure this, and hopefully unleash some more power.

RM.

[wiso]

hey rollamatt just a thought, does your engine have any modifications internally, like hiflowed head, bigger valves etc? cause as Joshtix was saying to me the other day if an engine flows better the boost will not build up in a back log as much so the registered boost will not be as high. Just a thought,

before you changed the pulley was it running 10psi like its supposed to standard?

could your ecu be hitting a boost cut? see if it pops any codes?

[rollamattae86]

There has be no inturnal mods done but i have just done a full rebuild on the motor.

i think i going to try and get a psi reading befor the cooler and see if the cooler is slowing the air flow to much?
might be the problem

before i changed the pully i was getting 8psi

how would the ecu cut boost wouldent i fill that much loss of power?

[wiso]

well on the map engine you ar supposed to be getting 10psi, so if you were only getting 8, there has always been a problem or misreading there, so chances are this has just amplified it

how would the ecu cut boost wouldent i fill that much loss of power?

well the ecu's have a boost cut at 14psi, so if it was hitting that the ecu would be pulling it down limiting it, and no you may not feel a huge loss in power, cause it just brings it down a bit, its not like it cuts boost all together

[rollamattae86]

i was told that a map gze was ment to make only 8psi stock, not 10psi.
what do the vacume lines on the back and front of the charger?
i just have them pluged by running a vac hose from one to the other or i get a vac leak from it.

,matt

[old_mr2]

stock afm gze 7-8PSI
stock map gze 9-10PSI
reason smaller SC pulley from factory

[wiso]

that vac lines could be your issue, i will get a photo of mine and show you how they go

[Ben Wilson]

I've never seen over 11.5 psi with various supercharger and inlet setups (using a 175mm pulley). My car still generated 114kW at 10 psi. Don't worry about what the guage says, if you've got time to read it, you're not busy enough

[rollamattae86]

thanks for all your replys,

what dose the vacumme lines coming off the charger do, the three of them?
may these be the problem because i have the conected to each other with vac hose because i have removed the brown and blue solinoids that they used to run to.

thanks

[wiso]

they all do interconnect to each other, the front and back join via a t peice and the other one (above the filler side) joins to them via the ACV, when power is applied to the acv air should flow in from the intake, (before the throttle body) to the vac lines.

soo i dunno, maybe some sort of atmospheric reading to base it, or perhaps extra air, but yeah you may need that ACV back

[TooF]

they all do interconnect to each other, the front and back join via a t peice and the other one (above the filler side) joins to them via the ACV, when power is applied to the acv air should flow in from the intake, (before the throttle body) to the vac lines.

soo i dunno, maybe some sort of atmospheric reading to base it, or perhaps extra air, but yeah you may need that ACV back

they are used to equalise pressure in the gearcase of the SC.