It'* probably dumping the boost through the bypass valve. As to why, I have no idea... but I didn't watch it.. I'll have to do that next time I hit 102 :P



**** Amendment to first post, this was on 93 octane.

I'm sure that'* what it is. Boost dump caused when the computer signals the boost bypass solenoid to kill the power. Possibly tied to engine air temp and knock controls.
I would strongly recommend bypassing your solenoid when not in protective mode.

Do you know how to directly bypass it without disabling it?

If you disable it by pulling the plug, it won't close properly and you can't build boost.

Check out the Forced Induction Area here for info on the bypass. May be in tech-info at the top as well.

No.
It will simply not allow the solenoid to activate.
Under negative pressure, or vacuum, the bypass is open. It has a separate supply directly from the intake manifold, before the supercharger, to the top of the bypass actuator cylinder.
Under positive pressure, or boost, the bypass closes. It will only open if the other side of the can sees a higher pressure.
The boost control solenoid is connected to the opposite side of the bypass actuator cylinder. It is supplied from a vacuum (pressure) line that takes its source from after the supercharger.

So, by simply looping the bypass solenoid outlets, you can trick it into a normally functioning bypass but without the computer contolled over ride ability.

Good times, glad you made the 13 club. Some day I'll be there, anyways I didn't notice this yesterday, I did have one run over 100mph but didn't notice slowing down at the end. Wasn't watching my speed real closely though, so it could of happened but I don't think so for me. Curious to hear more about it and Scotts reply. I'll try to watch for it this week.

I'll give that a shot in about an hour

Thanks for the tip.

OK, I guess I need a different explanation or a picture of where to move each line.

For contrast, I did it wrong and it was not working right so I only saw 4lbs of boost, but it still stumbled at 102/3 and didn't shift into third.

I have a 97 with an Intense PCM and have not experienced this problem.

Cheers,

1st Congratz on the 13'*! Impressive with the minimal mods.

Second, I hit this wall once at the track and once on the way home. At 102 it just stopped climbing, didnt drop, didnt advance, stuck at 102 until I let off the accelerator and then it shifted into 3rd. Valve float was my first thought but with all the valve train mods im not sure this possible unless its a stock lifter problem at those rpms....