IS F (2008-2014) Discussion topics related to the IS F model

Drag Run Results.

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Old 11-28-11, 02:23 AM
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Rider
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Default Tire pressure for drag racing?

Gna hit the strip today and would welcome some tips! whats the optimal tire pressure? lets hope it hits low 12s. mods are I/H/E
Old 11-28-11, 04:25 AM
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MRxSLAYx
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What type of tire are you going to run? Do you know what the weather is going to be like?
Old 11-28-11, 05:39 AM
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Rider
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PS2s.. 18-20 degree Celsius
Old 11-28-11, 06:01 AM
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caymandive
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Originally Posted by Rider
PS2s.. 18-20 degree Celsius
Considering track prep varies you might just want to try and play with pressures and see what works best for you. I'd personally start around 32psi and go down from there. At those temps and your power level it's going to be a hit or miss with traction on street tires.

I say, if the sun is out heating the pavement and track prep is descent, you shouldn't have a problem. Good luck!
Old 11-28-11, 09:47 AM
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Dv8tion388
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Originally Posted by caymandive
Considering track prep varies you might just want to try and play with pressures and see what works best for you. I'd personally start around 32psi and go down from there. At those temps and your power level it's going to be a hit or miss with traction on street tires.

I say, if the sun is out heating the pavement and track prep is descent, you shouldn't have a problem. Good luck!
^
Start high like James says and go from there. Experience & feel will dictate if you need to lower the pressure.
Low 12's isnt as easy as it sounds, but good luck!

~Dv8
Old 11-28-11, 12:11 PM
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Rider
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Default Drag Run Results.

Decided to drag the car to find out if the headers actually added performance due to low dyno results as discussed earlier. Results are Below. Wanted to shave off another .2/.3 but started raining towards the end. Next time hopefully.
Old 11-28-11, 12:48 PM
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thread needs to be moved... but 12.5 1/4 mile.. awesome!!
Old 11-28-11, 12:50 PM
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Justin2JZ
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Were you able to get the ideal tire psi?
Old 11-28-11, 12:58 PM
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MRxSLAYx
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Starting at 32psi is going to do more bad than good IMO. Proper PSI is really tricky with street tires because you really dont want to get them too hot...

I would start somewhere between 22-26psi (cold) and move your way down from there. You will have to keep in mind that after your first run, the pressure should go up a few PSI.

Remember not to get the tires too slick. If you are able to hot lap, only do an extremely short burnout so that you can get any excess rubber off the tires.
Old 11-28-11, 01:00 PM
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SeanGTS
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Looks like 113.08 mph, do you have a before your headers slip?

Ask around for stock trap speeds to compare.
Old 11-28-11, 01:14 PM
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mcauley
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That's a good time
Old 11-28-11, 02:17 PM
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caymandive
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Threads merged.

Rider, can you give us more details? How many runs did you get in, what tires pressures where you running (hot), weight reduction if any, fuel level, etc.
Old 11-28-11, 02:53 PM
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xjason
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Shouldn't you be able to hit high 11's with those mods?
Old 11-28-11, 03:00 PM
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madastep
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xjason , you won't unless you have a drag radial with those mods. and then it depends on the racer/track/conditions of car and track
Old 11-28-11, 04:16 PM
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Dv8tion388
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Originally Posted by xjason
Shouldn't you be able to hit high 11's with those mods?
One IS-F owner (cayman) under quite possibly the best drag racing conditions breaks a high 11 and its automatically a gimmie for the rest of us now...?

Mid-low 12's with intake, headers and exhaust. Grip, altitude and weather all play a huge role.

Rider:

The mid 12's is a great sign that your horses are there...

~Dv8


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