pdv25 Viper vs GTR

[pdv25]

Here is another vid. TRC was not around so vid quality sucks but you get the idea. This is my friends full bolt on GTR on E-85, race was a 60 roll.
We were very surprised by the outcome. We knew the GTR was going to win, but it was close.


http://www.youtube.com/watch?v=4VFMA7NQntw

[mnc2886]

Amazing what a Gen V can do with an accurate IAT!!

What does the GTR dyno at?

[plumcrazy]

yup, respectable

[pdv25]

Amazing what a Gen V can do with an accurate IAT!!

What does the GTR dyno at?

I'm always looking at IAT. It was at 95 degree. The GTR should dyno right around 585-600 on a mustang dyno. It has the same mods as my old GTR but, this GTR is half a car quicker.

[mnc2886]

I'm always looking at IAT. It was at 95 degree. The GTR should dyno right around 585-600 on a mustang dyno. It has the same mods as my old GTR but, this GTR is half a car quicker.


That would give it about a 80 horsepower advantage, but the Viper probably weighs 400 lbs less. Great run for the Viper! Longtubes and you would've won.

[pdv25]

That would give it about a 80 horsepower advantage, but the Viper probably weighs 400 lbs less. Great run for the Viper! Longtubes and you would've won.

Yea I think long tubes and full exhaust and it should be close. A tune would be great also LOL!

[Nine Ball]

At 95F IAT, you weren't at full ignition timing. It pulls timing aggressively beyond 90F.

[FLATOUT]

At 95F IAT, you weren't at full ignition timing. It pulls timing aggressively beyond 90F.

Tony, have you guys thought about wrapping that part of the MAF housing in gold DEI foil/Tape?

[v10tt]

Can a Little of water/meth injection help the IAT issue?

[Resident Alien]

What's the stock final drive axle ratio of a GT-R? I'm guessing well above 4:1

[v10tt]

At 95F IAT, you weren't at full ignition timing. It pulls timing aggressively beyond 90F.

Typically the IAT (Intake Air Temperature) sensor is a thermistor, which basically means it measures air temperature by detecting resistance in the air. It is usually a two wire sensor supplied with a 5 volt reference wire.


As air passes over the sensor the resistance changes. This change in resistance affects the 5 Volts supplied to the sensor accordingly. Colder air causes higher resistance and higher signal voltage & warmer air lower resistance and lower signal voltage. The PCM monitors this change in the 5 Volts and calculates air temperature.

Could a resistor be installed inline in the wire back to the PCM to fake the reading, and keep the IAT below the 90 dg. F mark so the computer never pulls timing?

[Nine Ball]

We used to fool the IAT reading with resistors back in 98-99 with the first LS1 f-bodies. Someone figured out which resistance value corresponded to certain temps, and we'd switch them out at the track. They worked excellent. But, not something you'd leave in place, as the computer really does need to know the proper IAT temps when just driving around. Relocating the IAT sensor somewhere that it would pick up actual ambient temps would be favorable vs using a resistor trick.