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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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vaccum and boost retard question for SC!

  • Thread starter Thread starter Ny Mustang Guy
  • Start date Start date May 26, 2006

Ny Mustang Guy

Founding Member
Dec 10, 2001
322
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0
Queens Nyc
May 26, 2006
#1
  • May 26, 2006
  • #1
im in the middle of installing my SC.. w/ BOV as a bypass... and Msd 6A w/ the MSD Boost Retard Box (I Had an msd 6a and I bought the SC w. the MSD Retard box that goes along with the 6a..) The BOV tis a Greddy type RS that I can use also as a Bypass valve
NOTE: I HAVE A '90 5.0 in My car..Ported Cobra lower/upper, 65mm TB (for now), 24lb inj(for now) Ported Polished E7 heads (came that way), 70mm MAF, AC delete pulley, smog delete pulley, E Cam, 255lph in tank pump..and engine wise...thats all I can think of right now. Yes I have a 24lb FMU..and It is a Powerdyne 6lb Headunit (that I plan to go 9-10lbs with down the line)

1.It looks to be a vaccum line on the BTM Box... where is a safe spot I can tap to.. or connect it to??
2.I have a GREDDY TYPE RS BOV/BYPASS.. that I am using as a bypass that seems to have a vaccum on it... where is a safe spot i can put that to??
3. Where do I connect my boost gauge.. right now I connected it to the T in the firewall in the spot where the AC Vaccum line used to go.. is that alright??
4. WHAT DO I SET MY BOX TO RETARD AT?.. there is a knob on it that you can start the retard at... and I also have the knob that goes in the car of where to set the retard at... What is a safe setting for 6-7psi?? On the Box (The manual says usually 2 for starting on the box) and the retard switch that goes in my car?

Sorry If i don't explain it right.. really tired from working on the car today.. THANKS!
 

QUIKSVT

New Member
May 19, 2006
93
0
0
May 26, 2006
#2
  • May 26, 2006
  • #2
I have a 95 Vortech'd Cobra, 6psi...

I run my base timing at 13* ... start point at 3 ... in car controller anywhere from 1-2 ...
 

RacEoHolic330

I like to dress like a pretty girl
15 Year Member
Mar 4, 2003
4,014
1,698
203
Allentown, PA
May 26, 2006
#3
  • May 26, 2006
  • #3
you can splice your boost gauge and line from the bypass valve into any other vacuum line..preferably one coming off the intake manifold. The vacuum tree on the firewall works well.
 

FORCED2DV8

New Member
Jun 6, 2005
458
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0
Grand Rapids MI
May 26, 2006
#4
  • May 26, 2006
  • #4
You want direct or as close as possible to the manifold vaccum, for accuracy of pressure ( boost) or vacum in the manifold.
 
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