faulty boost gauge???

[Auburnman]

I test drove a new 04 Cobra and I noticed the boost gauge never got above, lets say, 2 PSI. The salesman said it might need recalibration or something like that, but he assured me that the SC was working. But what was odd is that I didn't feel the surge in power that I would expect from a supercharged cobra (in other words, the acceleration was not any better than my 01 cobra).

BTW, I could hear the SC whine, so that part must have been working, but I wonder if the wastegate was stuck open.

Do you guys have any comments/thoughts? Shouldn't the boost gauge read higher? Is there some button to activate "performance" mode?

 

[squire]

No button. My boost gage goes right to 10psi when I put the pedal to the floor

 

[Auburnman]

No button. My boost gage goes right to 10psi when I put the pedal to the floor

You bring up a good point... Do you have to mash the pedal to the floor for the boost to go to max?

Now that I think about it, I may not have made the engine go Wide Open Throttle. However, I did get on it, so it still doesn't make sense to me that the car felt sluggish for a 400hp car.
Is there a certain RPM range that engine has to be above before it makes max boost pressure?

 

[Spanishfly]

I witnessed the same thing when I test drove mine. I asked the salesguy about it and he said he's never heard about anything going wrong with them. Then when I bought it I figured out that the engines are so tight new that it takes a lead foot to get that boost gauge to move. It moves though

 

[stang976]

i thought the roots type blowers have a steady torque curve at make full boost in low RPM??

 

[alfman9]

SVT programs the cars to make little to no boost for the first 200 miles or 20 key strokes. They want the motor to set a little before you go pushing in all that extra pressure. Mine was doing the same thing and that is what SVT told me when I called them.

 

[Auburnman]

SVT programs the cars to make little to no boost for the first 200 miles or 20 key strokes. They want the motor to set a little before you go pushing in all that extra pressure. Mine was doing the same thing and that is what SVT told me when I called them.

Good info...thanks alfman.

It just goes to show that these salesmen don't know jack about the cars they are selling.

BTW: The cobra I test-drove had less than 200 miles (i think it was around 80). So that would fall in line with what the SVT rep told you

 

[Pitch4pd]

The salesman never know anything. The best thing is they even try to lie to the guys that work on the cars. Never trust them on anything technical, I have only met one salesman that truely cared about getting the specs right. It was so refreshing to watch him go thru a service manual

 

[Tat98Cobra]

SVT programs the cars to make little to no bost for the first 200 miles or 20 key strokes. They want the motor to set a little before you go pushing in all that extra pressure. Mine was doing the same thing and that is what SVT told me when I called them.

Exactly as he states.

Its really sad that salesman dont know the vehicles they are selling....

peace

 

[Auburnman]

i thought the roots type blowers have a steady torque curve at make full boost in low RPM??

Can one of you guys answer his question.... I still need clarification on this issue too.

Thanks.

 

[alfman9]

Can one of you guys answer his question.... I still need clarification on this issue too.

Thanks.

When I whomp it, she screams.
When she screams, the little needle jumps to the right like there is no tomorrow.
Torque. We got Torque. A whole lot of Torque.