Why is my car not faster?

[whitestang88]

I have a full exhaust, systemax intake (lower only), ported the exhaust side of my heads (basically took out EGR bumps and smothed), a K&N, plus all the free mods and removed smog stuff. My car is a 5spd GT with 2.73s. I ran it with a g-tech pro comp and it would only do 14.7, I was expecting more that that.

What would you do first?

 

[LT1Killa]

G tech is not always the best way to test your car, but a baseline to go by. Take it to the track and see what she does. When you do, let us know.

 

[MustangMulch]

Yeah.. i wouldn't trust the g-tech, especially not the mph. I have one and its not very accurate.

 

[somersdp]

That could be pretty close depending on milege and driving. Not to piss you off but the internal wear of your engine significantly decreases power to the wheels on a high milege engine. The stock gear is killing you!!! And traction on the street is a lot worse than on a hot sticky track. Just my .02!!!

 

[ECU5.0]

i ran a 14.5 at 95 mph....i was pretty disappointed...but whatcha gonna do

 

[somersdp]

Try recalibrating the g-tech and make a series of passes (3). Then take an average of those and go from there. Are the mods you listed the olny done to the car?? And are you still speed density??

 

[whitestang88]

That makes me feel better.

As for the milage, the car only has about 90k miles on it.

 

[whitestang88]

No, its converted. and yes those are the only mods, when I bought it was completely bone stock and from the original owner.

 

[somersdp]

What is your timing set at and fuel pressure??? Also what is your TPS at?? Also was the MAF sensor used when you got it??

 

[whitestang88]

The timing is set at 13-14 degrees, I am not sure how to check the fuel pressure, TPS @.98 and the MAF was used but I am sure that it is good since it came from a running car.

 

[somersdp]

Clean the MAf sensor wires with a q-tip and some rubbing alcohol. Our drag car picked up 3 tenths by cleaning a filthy MAf sensor. If possible pull the sensor out of the housing and cleaning the wires will be much easier. If not spray some contact cleaner on the 2 wires, but they must be dry before starting the car back up. Hope this helps.....

 

[somersdp]

Also have you checked your codes yet??

 

[whitestang88]

What do you mean by pull the sensor out, just take it off the fender. I don't think that I have ever cleaned one of these and always thought there was only one wire.

I haven't checked the codes since engine light has never been on.

 

[SuperStang83]

I think the biggest problem is your gears....that intake and headwork is only killing your low end, you need some gears to take advantage of your high end!

Jakob

 

[somersdp]

The plastic box on the top of the housing is actually the sensor, not the big round aluminum housing. The plastic box should have 2 screws in it and the sensor comes out. If the screws are the original ones they are tamper proof and you need special hex bits to get the sensor out. If not pull the sensor out and there will be 2 wires. If not, take the whole sensor and housing out of the car and hold it up with the screen side facing you. Look very close inside the screen at the top just under the black box and you will see a hole with 2 wires in there. Those are the sensors!! Spray the cleaner on those wires if possible

 

[whitestang88]

You are probaly right, I would like to install some 3.73s. How much do you think that would take off my time if I were to go with 3.73s?

 

[whitestang88]

Can you drill out the screws to get in then replace after?

 

[whitestang88]

Also what is the wire that is in the middle of the big aluminum piece?

 

[ECU5.0]

the 3.73's will only help if you can get traction...otherwise they will kill you because your 60' time will suck

 

[whitestang88]

How do I check my fuel pressure?