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The Terminator
How-To
How To: Eliminate Boost Drop Off (eliminate boost solenoid)
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<blockquote data-quote="20SVT03" data-source="post: 10544242" data-attributes="member: 11763"><p>OK now I have a problem with this mod. I performed this mod a few months ago and did not notice a huge change except a lot of sputtering here and there, I rarely drive the car. I had a cheaper quality a/f narrow band gauge that monitors the factory O2 sensor. It showed switching so i figured no vacuum leaks maybe just my fuel going bad from sitting for months. I was going to have it checked by my usual tuner, I just couldn't get over the thought that the only thing I changed was performing this mod. I decided to ditch the narrow band and upgraded to a Innovate Motorsports wide band. Well I went racing today and to my surprise about half way down the track I looked at the gauge and saw 16.7!!!!!! I was freaking. I pulled plugs to inspect. No detonation but they got hot, the ground electrode was turning white. I looked over and over for a vacuum leak, I know i have good fresh gas, I even added 5 gallons of C16 from the track just to be sure. Per the instructions on this thread to leave it alone,I still couldn't get over the lower port on the boost dump valve just being open to atmosphere. With the car running at an idle there is no vacuum on that port. (Here's the best part) when i would blip the throttle, sure as sh*t I felt vacuum. So I don't know if my dump valve is bad OR there needs to be an edit to this modification to plug off the lower vacuum port on the dump valve. Anyways I plugged the port and made another pass my A/F stayed 12.5-7 the whole way down the track and I picked up .5 sec. Please someone verify what I'm saying is correct and if I am please everyone who has performed this mod plug the lower port.</p></blockquote><p></p>
[QUOTE="20SVT03, post: 10544242, member: 11763"] OK now I have a problem with this mod. I performed this mod a few months ago and did not notice a huge change except a lot of sputtering here and there, I rarely drive the car. I had a cheaper quality a/f narrow band gauge that monitors the factory O2 sensor. It showed switching so i figured no vacuum leaks maybe just my fuel going bad from sitting for months. I was going to have it checked by my usual tuner, I just couldn't get over the thought that the only thing I changed was performing this mod. I decided to ditch the narrow band and upgraded to a Innovate Motorsports wide band. Well I went racing today and to my surprise about half way down the track I looked at the gauge and saw 16.7!!!!!! I was freaking. I pulled plugs to inspect. No detonation but they got hot, the ground electrode was turning white. I looked over and over for a vacuum leak, I know i have good fresh gas, I even added 5 gallons of C16 from the track just to be sure. Per the instructions on this thread to leave it alone,I still couldn't get over the lower port on the boost dump valve just being open to atmosphere. With the car running at an idle there is no vacuum on that port. (Here's the best part) when i would blip the throttle, sure as sh*t I felt vacuum. So I don't know if my dump valve is bad OR there needs to be an edit to this modification to plug off the lower vacuum port on the dump valve. Anyways I plugged the port and made another pass my A/F stayed 12.5-7 the whole way down the track and I picked up .5 sec. Please someone verify what I'm saying is correct and if I am please everyone who has performed this mod plug the lower port. [/QUOTE]
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How-To
How To: Eliminate Boost Drop Off (eliminate boost solenoid)
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