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 Boost Gauge Help. - L67 Motor  

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noob_tastic
  • noob_tastic
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Post #1 post 10th May 2012 - 02:29 PM
I need help with my S/C V6. I have installed a boost gauge and after several attempts I found a vacuum line that produces a positive boost. The problem is that its not reading right. I have a 10 psi pulley on and I only get boost readings of 6-7 psi. I have the line connected to the fuel rails. have tried the one under the snout and it did nothing, -1 was the highest.


Thanks in advance, Noob.

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Wraith
Post #2

The better spot would be the vacuum line in front of the supercharger down the bottom.
newsky06
Post #3

QUOTE (noob_tastic @ May 11 2012, 08:29 AM) *
I need help with my S/C V6. I have installed a boost gauge and after several attempts I found a vacuum line that produces a positive boost. The problem is that its not reading right. I have a 10 psi pulley on and I only get boost readings of 6-7 psi. I have the line connected to the fuel rails. have tried the one under the snout and it did nothing, -1 was the highest.


Thanks in advance, Noob.



i had the same problem with my supercharged vt spac. but i was only running stock boost.
when i first hooked it up, i used the boost tee thing next to the fuel reg and it was only 1, maybe 2 psi.
then i changed it to the the port under the blower snout, and still only 1, maybe 2 psi.

then i adjusted the boost bypass valve solenoid, which is the thing next to the fuel reg. after that i was reading 5-5.5 psi all day every day.


but, with a 10 psi pully, i would only expect to see 7, maybe 8 psi on the gauge less if u have a good flowing exhaust and or roller rockers.

Wraith
Post #4

I wouldn't be teeing into the vac line for a fuel reg though. You want to make sure it has a good vacuum reading.

noob_tastic
Post #5

QUOTE (newsky06 @ May 11 2012, 08:28 PM) *
i had the same problem with my supercharged vt spac. but i was only running stock boost.
when i first hooked it up, i used the boost tee thing next to the fuel reg and it was only 1, maybe 2 psi.
then i changed it to the the port under the blower snout, and still only 1, maybe 2 psi.

then i adjusted the boost bypass valve solenoid, which is the thing next to the fuel reg. after that i was reading 5-5.5 psi all day every day.


but, with a 10 psi pully, i would only expect to see 7, maybe 8 psi on the gauge less if u have a good flowing exhaust and or roller rockers.


How did you adjust the boost bypass valve solenoid? Its the one thats between the supercharger and the throttle body right?

noob_tastic
Post #6

ok guys. hi have bypassed the solenoid and changed the vacuum for the boost gauge. seems better, but still only getting 6-7psi. its a digital boost gauge from supercheap. i have a hsv exhaust and a K&N panel. any ideas?

newsky06
Post #7

QUOTE (noob_tastic @ May 12 2012, 05:05 PM) *
How did you adjust the boost bypass valve solenoid? Its the one thats between the supercharger and the throttle body right?


there is 2 10mm bolts to back off, then pull it up as far as it goes or push it down as far is it goes. i cant remeber. sorry.

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