O.K. Guys and Gals. Here are a few PICS showing the location of the boost bypass solenoid.

Pictured here you see the solenoid located on the drivers side engine compartment. It's the only one there in this PIC.



Picutred below is a close up of the same solenoid. We only need to unlug the electrical connector above those 2 vacuum lines.



Here is a PIC with the electrical connector unplugged, and ready to go with constant boost



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Spiro-"The Greek"
BLK. #1476

Best run to date
12.373 @110.15
Best 60` 1.76
@ 4800 lbs.
On Pump Fuel
_________________________
JDM Engineering- Ford Specialist
_________________________

Johnny Lightning Performance
http://www.webtechnik.com/johnnylightning

"Empty Pockets Racing"Drag Race Team NJ-DE
Spiro99SVT@aol.com
LAUNCH HARD !!!

 

Nice work, Spiro. Unplugging it wouldn't throw any codes would it? Like wheter or not the truck had been chipped? Just curious.

Even nicer times...

 

Searched for another posts regarding and couldn't find.
What does disconnecting the solenoid accomplish?
Thanks for any input!

 

It prevents boost cut-off.



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Nuno Gomes
'99 Red L #413
Superchip R9, Granatelli 80mm MAF, Airaid, Carbon Fiber Dash Kit, Bassani Cat-Back, Performance Automatic Valve-Body, Astro Lid & Bedrug.

 

O.k. haven't studied for my test. Am I experiencing "Boost Cutoff" with it plugged in? Haven't lost boost before.
Is this just a "Drag Strip" thing or an every day drive thing?
thanks.

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99 Red Lightning
PSP Chip
Pro-M Meter
Lowered

 

It doesn't make the check engine light come on but I think it does put a code in memory. But, I've had three chips in, so what's another code?

I drove mine around disconnected and there's no difference, except the boost won't cut out anymore, which could be embarrassing in a street war.

Mine, though, for some reason never cut out while plugged in even when I hit 6k one day on accident. So, I've just left mine plugged in. But others have lost boost several times. ???

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Jim
Black '00
#1,757 built 3/30/00
Clear corners
J.L. Street program
J.L. Stage II ram-air
MagnaFlow Exhaust

 

Hi Guys
Maybe you'll have too disable the solenoid because your chip can't compensate for you. If I do remember correctly some of those Michigan guys posted how they blocked the vacuum line to the bypass valve and left the solenoid connected. If I do remember correctly they we using the Superchips chip. I think a few of their trucks would fall flat under some conditions but that issue is behind them now.

 

I don't know what you talking about by the boost cutting off. I don't think i've ever experienced this. Someone explain this to me better. Does this gain anything at the track. Just wondering

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She has allot of toys on her.
MAY BABIES STAT'S
Built 5/4/99
# 917 of 4000
Best ET. 13.42 at 100.98
best stock 13.96 at ?
2001 ET: 12.???
When the green light drops, the bullsh*t stops.

 

I have a Superchip R9 program and have experience lost of boost from wheel spin during up-shifts at the track. If I remove the connector this will prevent the loss of boost. Superchip was a little close with this over revving setting. If your using a Chip and you loose Boost during a run at the track or street, then remove the plug from the connector during those times. This is an engine safety device to prevent damage from over revving with boost.

Dave


[This message has been edited by BOOSTING-DAVE (edited 01-26-2001).]

 

here is a perfect example of why you need to do this...
i'm at the track doin a burnout...i trip the rev limiter...boost solenoid cuts in...i pull up to the line...green light, i take off..no boost...ran a 15.9...yippie! eek! do youself a favor unplug the f'in thing asap!

 

Yeah but does it hurt anything?

They way you guys talk about it doesn't seem so.

You know that you mention it I think I have experienced this myself. I was driving around town and I laid a patch in the street and didn't get that much traction (cause its cold out) so the truck did its little spurt and then it took awhile for it the come back to life. Is that what your talking about. If so, yeah I do that all the time. Never had that happen at the track. I always put the truck in first gear and do a burnout. Thats the only way to do a good burnout.

 

thats exactly what they mean...

 

Isn't this the same solenoid which vents air out of the supercharger when not under boost, to prevent superheating the air in the SC?

So disconnecting it and driving around, you will eventually melt (overheat/damage) your SC.

I believe this is a drag-strip mod only.

?????

 

This is something you WANT to do in any race(sreet or strip) conditions.It happens on the street but only when you are racing somebody in a slow s10 or something.I had this happen to me to an s10 all supped up.He was running in the 15s and The only reason i even beat him was I got 2 trucks up front.It is very imbarrasing when you need to explain to a v6 s10 that you lost boost!! I dont care If I have to pull over and unplug it at a stop light race,I will cause these are braggin rights you know!!

 

DeaminAboutL- If you look at Spiro99SVT first picture you'll see the solenoid with the connector. The Big looking dashpot thing behind controls the gate that by-pass the blower. Under normal driving conditions the incoming air from the air filter is bypassing the blower via that gate to the intake manifold. Now when we "get on it" that gate moves and allows incoming air into the Blower to make boost. Now if the computer reads a over speed (High RPM's) it turns on that Boost kill solenoid. And that will make the gate cut off air to the Blower. We don't have a "Waste Gate" like turbo's engines to vent off the over pressure (Boost). That bypass solenoid is for the safety of your motor. I would only remove the connector while at the track to prevent Boost loss. There is still one more safety after the boost kill, at some RPM's over the Boost kill (don't know the number) the computer will start shut off gas to cylinders to slow down. From what I read, the M112 has very little drag on the engine when not making boost.

Dave