OK, so I go to a GTG on Saturday, everything's fine with the world. Pull out of the parking lot to head home, punch it a bit, and .... <nothing> DIC goes crazy, Service Active Handling, Service Traction Control System, Reduced Engine Power and the whole shebang. I limp into a lot up the street, check the codes and find P1278 and a few others, which I clear, and it goes back to normal power and lets me get home. Several times along the way I hit full throttle and each time was shut down with a series of codes and Reduced Engine Power. I left the car overnight. Today I'm up and out with the car, and it makes it 150 miles no problem. I'm thinking I've got battery and/or ground problems somewhere. Right near home I step on it and .... <nothing> It starts all over again. Checked all my codes and it led me to the throttle position sensor, which had great connections and no obvious problems with dirt or water, etc. After doing a bit more digging, I thought I would go check the travel of the throttle plate. Everything I checked seemed to be in fine order, but the codes said that the plate and the pedal were not moving within the same travel percentage parameters. I had a revelation. I popped the hood and squeezed the silicone connector between the air bridge and the MAF, and what do you know? I could feel the Vararam Velocity Stack in there sideways. Pulling off the connector showed the stack to be jammed into the throttle body. No wonder I was getting codes telling me the plate wasn't traveling far enough - it wasn't! So I pulled it out, whirled around the block a few times and it seems my troubles are over. And I was getting ready to take this thing to the stealership!!!

Anyone need a velocity stack? I'm not going to reinstall this one...

 

I've been running a stack for over a year. No problems. Sounds like there was something faulty with your installation. Did you use the little pin/clip to hold it in place?

 

THAT seems to be missing... I'm guessing that one of the last times I had the air bridge/connector off that I knocked it out of place. After putting the stack on the first time, I really just forgot about it. Should have taken more care and paid more attention to what I was doing.

 

I wondered the same thing... I was stupid enough to buy one almost three years ago... I figured why not... Now it's WHY????

Anyone notice one bit of difference? I'm thinking I saw a post once where someone showed Dyno results... 3 HP difference maybe??? and maybe it was worse and not better??

Sorry, don't mean to highjack your post... I had to get that off my chest!!

 

No hijack that I see! I've got to agree - I didn't see any noticeable improvement - just installed it and forgot it. Until now...

 

I think this is the gizmo you're referring to. I scanned this image from a recent catalog of a well known Corvette supplier.

Talk about 'Corvette Tax!' -- 50 bucks for a piece of molded plastic?
(Oddly -- or maybe not -- VaraRam offers this for $34.95 on their site.)

And don't think I'm being self righteous here. When I owned my C4, I plastered on all of the 'easy horsepower' stuff: airboxes, filters, throttle-body inserts, stainless steel cat-back exhaust. IMHO, all I got out of them was an lighter wallet and Borla's trademark cruising-speed drone.

 

I've been thinking about getting one of these gizmos. Glad I caught this thread. Thanks.

 

6-10 lbs of torque - not enough to marginally change the direction of my life.

I'll pass...

But thanks for asking.

 

In this case, I don't think it's the dreaded "Corvette tax", as it's the "Well known Corvette supplier tax". It pays to shop around...

 

Glad to hear you figured out the problem Bob. And thanks for sharing the details.

 

I hope your car didn't swallow the clip...

 

Hate to say it, but that stack sounds like another one of those gimicks like the Hood Seal and the Throttle Body By-pass. If you add them all together, you could get upwards of 30 hp.

 

I'm guessing I lost it when I took the air bridge off the last time, and the stack was just hanging in there with edge pressure from the hose, albeit not very well. And George, I have to agree with you. When I had a C4, everyone ran out to get those $60 bits of aluminum that bolted in the center of the throttle body to give you that extra bit of hp, but I seem to remember reading not too long ago how these didn't work at all. And this is just the next incarnation of the same. Fool me twice...