In my experience when you install a turbo, Vtec isn't quite the drastic change that it was naturally aspirated. The boost just seems to over compensate for the vtec cam lobes. If you have access to a Honda PGM tester or HDS, you can go in to the data list function, and look to see if the solenoid is coming on at the appropriate RPM. I'm assuming that you're engine is built if you are running 25psi. 373 whp seems kind of low for that much boost. What is your compression, and what other parts did you have installed. Lower compression pistons could give a lack of VTEC feeling. Just some random thoughts for you.

 

Are you running the stock cams on an FI setup?

If so, there's one problem.

 

You won't be able to use any OBDII scan tool such as a PGM or HDS tester, Hobbyholic's car has AEM EMS, OBDII is not supported.

 

My car is stock standard, got 60kms on the clock.!!
service the car every 5000km ..!!

 

Do you have any idea what you're talking about? The stock cams work fine with FI.

 

Stock cams work just fine.

 

 

Obviously they work great.

For a car making that kind of power with a turbo, he needs more duration to get any feeling of VTEC anymore. Definitely a much more aggressive cam.

Never did I say the cams were incapable.

 

You do know that a S2ki member has pushed 600+hp with stock cams?

Properly tuned Turbo VTEC engines don't have the huge power spike in VTEC, they just deliver smooth power throughout the RPM range.

 

The secondary lobes have a higher lift as well as a longer duration. When the transition from the primary to the secondary lobes occurs, the combustion chamber sucks in more air and fuel mixture, hence a bigger explosion and thereby resulting in more hp. Turbo or no turbo, there should be some kind of gain at the crossover point. Maybe not a whole lot, but there should be some kind of gain. If Hobbyholics dyno shows a straight curve from before, to after the crossover point, something may be askew, then again, I'm no expert.

Full blown race S2000's don't even have VTEC crossover points. They just have one profile for intake and one profile for exhaust. The profiles are such, that the motor won't run (or very well) below 4,000 rpm. The racers always keep the motors reved up above 6,000 rpm's anyhoo.