x182dan
SHO Member
well I found out the reason why my car is so SLOW. The secondaries never opened because of a vacuum leak. Any ideas how much hp or torque I gained by having the secondaries back?
how much hp and torque is lost if the secondaries don't open?
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I know PEAK TQ is under 4000 rpms, So you probly lost little to no torque.
Hp i know PEAKS at 6400ish rpms, So you probly lost maybe 60ish hp?
I mean its hard to tell. Only way would go on a dyno, run one run with the secondaries. Then unhook the switch and make another run.
-Mike
Hp i know PEAKS at 6400ish rpms, So you probly lost maybe 60ish hp?
I mean its hard to tell. Only way would go on a dyno, run one run with the secondaries. Then unhook the switch and make another run.
-Mike
ohfosho
ontario SHOwner
well if you unhook the switch, the secondaries will be open all of the time. whereas they would be opening at near 4000 rpms normally.
there is no way besides mechanical means (taking off the return springs, or jamming the linkage so it stays closed), and vaccuum to keep the secondaries closed
i had my secondary controler unooked for a good 3 months after i last installed the intake...the connector got behind some stuff, and lost in the mess, therefore i missplaced it. but the car seemingly ran fine, i just didnt notice 'a boost' at 4000 rpms. and i got a code. so i checked and found my problem, and now its working great and i can feel a difference. definetly more low end TQ, there will be no difference on the top end seeing as though they are already fully open anywhere after 4k rpms... maybe 25 Ft. Lbs of Tq lost by disconecting, but my butt-dyno could be wrong...but no chance of losing 60 HP! wel on second thought, if you are destructive and hate your car, and therefore do something to keep your secondaries closed all the time, then i guess you would lose near 60 HP, maybe more...what are the secondary plates? about 1 and 3/4" diameter? well you would lose 6 times that, flowing into you engine.
just unhook the electrical connector on the driver side rear just under yet attached to the intake...beside the black cylinder with vacuum hoses in and out of it. feel for your self, no damage can be caused by doing this.
there is no way besides mechanical means (taking off the return springs, or jamming the linkage so it stays closed), and vaccuum to keep the secondaries closed
i had my secondary controler unooked for a good 3 months after i last installed the intake...the connector got behind some stuff, and lost in the mess, therefore i missplaced it. but the car seemingly ran fine, i just didnt notice 'a boost' at 4000 rpms. and i got a code. so i checked and found my problem, and now its working great and i can feel a difference. definetly more low end TQ, there will be no difference on the top end seeing as though they are already fully open anywhere after 4k rpms... maybe 25 Ft. Lbs of Tq lost by disconecting, but my butt-dyno could be wrong...but no chance of losing 60 HP! wel on second thought, if you are destructive and hate your car, and therefore do something to keep your secondaries closed all the time, then i guess you would lose near 60 HP, maybe more...what are the secondary plates? about 1 and 3/4" diameter? well you would lose 6 times that, flowing into you engine.
just unhook the electrical connector on the driver side rear just under yet attached to the intake...beside the black cylinder with vacuum hoses in and out of it. feel for your self, no damage can be caused by doing this.
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jedhead
New Member
The secondaries would not open up after I finished installing Stage 1 Cams in the SHO. The car felt much stronger in the mid rpm but torque would drop off fast at 5000 rpm. I thought weird. A few days later we went to a meet in Bakersfield. That is when we discovered the electrical connector to the switch that opens the butterflies was disconnected. Huge difference in power past 5000 rpm.
Bob
Bob
Whiner
Cptn. Realistic
From you video, it sounds like your secondaries are open.
sdpatt
Sr. SHO Engr.
The secondaries are closed by vacuum applied to the vacuum actuators and opened by the combination of the release of the vacuum by the electric solenoid and the force of the return springs in the actuators.
x182dan
SHO Member
Whiner said:
no sir they won't trust me. I have a cone filter and when I race again I will show you how loud it gets when they open
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