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

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Old 07-27-09, 02:10 AM
  #106  
Dave600hL
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Originally Posted by caymandive
The reason we went with 245/40/18 is because it's close to the stock size but just a tad shorter which equals quicker acceleration without incurring an extra gear change. There is no benefit in going with a taller diameter tire or anything wider with the grip the 245 width drag tires offer.
That used to be the case with manuals, but I would believe the gains made would be worth the extra gear change when it is a quick as it is??? But I have not done a quarter mile since I was in my teens and I have no idea where on the track the last change is for the F.
Old 07-27-09, 04:22 AM
  #107  
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Originally Posted by oztiks
Are you running the 18x8's or 18x8.5 IS rims? I'm not having much luck finding either.
18x8.5's. I found mine on ebay. You can pick them up for about $140 each with the buy it now option.

Last edited by caymandive; 07-27-09 at 04:43 AM.
Old 07-27-09, 04:47 AM
  #108  
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Originally Posted by Dave600hL
That used to be the case with manuals, but I would believe the gains made would be worth the extra gear change when it is a quick as it is??? But I have not done a quarter mile since I was in my teens and I have no idea where on the track the last change is for the F.
Nope! I tried my drag tires that I used on my IS350 that had 245/35/18's and due to the smaller tire diameter With an approximate tire diameter of 24.78 the car indeed requires an extra shift right around 110mph mark. I was having to shift 4th to 5th right before the end of the quarter mile which was costing me time. 245/40/18's hit the sweet spot and allow the car to remain in the top end power band.

Check this out.

Stock:


With 245/35/18:


With 245/40/18:

Last edited by caymandive; 07-27-09 at 05:04 AM.
Old 07-27-09, 07:44 AM
  #109  
oztiks
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cayman - AWESOME information!
Old 07-27-09, 12:58 PM
  #110  
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That spreadsheet looks might familiar...
Old 07-27-09, 01:25 PM
  #111  
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It should! I got it from our much appreciated Tech Info Resource.
Old 08-16-09, 03:12 AM
  #112  
oztiks
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Just an FYI, suffered "Catastrophic Solenoid Failure" .. heh heh. Apparently NOS make notoriously **** solenoids. After about 20~ total uses, my (NOS) nitrous solenoid ate itself along with the NOS purge. The NX systems purge was the only one still working (except the NOS fuel solenoid)

Needless to say, all the NOS solenoids are being (well, already have been!) removed. Having some other stuff done as well (bottle mount changes, oxygen sensor install (finally!)....

If anyone has any good suggestions on bottle warmers please let me know. I was looking at NX's fire & ice product but it is "out of production".....
Old 08-20-09, 09:15 PM
  #113  
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All NOS solenoids have been removed. NX all the way for now. Bracket mounts have been redone and new, better brackets are being installed. Bottle warmers arrive tomorrow... getting close!
Old 08-20-09, 09:24 PM
  #114  
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Originally Posted by oztiks

If anyone has any good suggestions on bottle warmers please let me know. I was looking at NX's fire & ice product but it is "out of production".....
I dont know if your willing to deal with the hassle but I have always been a fan of a good blow torch
Old 08-20-09, 09:29 PM
  #115  
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Something I came across a few days ago... and kinda knew already:

http://www.dragstuff.com/techarticle...e-heaters.html

Propane Torch

Even though heating bottles with a propane torch is a popular method, it's dangerous and can get people hurt.

Aluminum starts to melt around 800 degrees and applying that much heat for too long in any one spot can weaken the bottle causing it to rupture. Think!!! We're talking about an aluminum (which melts easily) nitrous bottle filled with an oxidizer at high pressures and applying a torch (filled with fuel) to it - not a wise idea. Don't even consider using a torch on a carbon fiber bottle.

There are more reasons, besides the obvious safety issues, to not use a torch to heat your bottles. Many tracks have outlawed this practice and some sanctioning bodies such as IHRA, AMA/Pro-Star have as outlawed it as well. Those telltale scorch marks on a bottle may also prevent you from getting the bottle refilled at many locations.
Old 08-21-09, 12:01 PM
  #116  
Joe Z
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Glad your replacing the failed parts... with

Any issues arise with the Engine due to the failed parts??

Where you able to get anymore drag runs in with the NOS, when it was working?
Old 08-27-09, 07:23 PM
  #117  
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Originally Posted by Joe Z
Glad your replacing the failed parts... with

Any issues arise with the Engine due to the failed parts??

Where you able to get anymore drag runs in with the NOS, when it was working?
Wow.. they have an emoticon for nx here.. nice

No, there are no apparent signs of engine damage from the NOS solenoid failure:
Basically, the solenoids NOS make are ****, especially when used in conjuction with a progressive controller. It eats them in a handful of runs. Pretty disappointing. Even my PURGE solenoid disintigrated, apparently they can't handle anything more than 975PSI.
Old 08-27-09, 07:28 PM
  #118  
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So.. an update:

I was previously running on a single NOS nitrous solenoid and a single NOS fuel solenoid, and two more nitrous solenoids: one NOS purge, one NX purge. Guess which was the ONLY piece that lasted? The NX.

The above configuration has been replaced completely, i now have (single stage, progressive):

2x NX nitrous solenoids
2x NX fuel solenoids

2x NX nitrous purges

The whole system was re-jetted and re-tuned. All I will say right now is 5XX HP and 5XX TQ!!!!!

I have a show this weekend (Saturday) so I will likely get pictures, etc, from there and do a more detailed writeup and share actual dyno numbers. I also am hoping to get some track runs in.

I only got to use the system for a little bit today (got it back late last night), but it freaking MOVES.. can't wait to track it!
Old 08-27-09, 08:34 PM
  #119  
fleadog99
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I can't wait for runs and times along with video would be nice. Way to go. sounds scary fast. Now just make sure you have grip when you do runs. That seems to be the biggest problem when adding that much HP and TQ to these cars well to any cars for that matter.
Old 08-27-09, 09:41 PM
  #120  
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Still going to have grip issues, sadly... running on the 19's with PS2's and my 1.5"~ drop


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