K&N Cold Air Intake Follow Up Runs ! Myth debunked !
11-21-16, 06:49 PM
#31
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Well, at least I was half right! Still some nice times though. As I said, I'm impressed with the 60' times on your IS F. I was consistently cutting 1.8's with my Camaro on street tires. But those tires had sidewall and were more attuned to drag racing.
I'm hoping to cut 1.9's with my RC F. I believe that I could with it stock. The only problem is it will no longer be stock when I finally get the chance to try. I'm too busy with work right now. Work > Play.
I'm hoping to cut 1.9's with my RC F. I believe that I could with it stock. The only problem is it will no longer be stock when I finally get the chance to try. I'm too busy with work right now. Work > Play.
11-21-16, 06:56 PM
#32
Lead Lap
I can't help ya there. I only know a little bit about my RC F and really nothing about the IS F. From what I read about the RC F the times between auto and manual mode appear to be pretty similar. But manual mode wins by a hair. In both runs the car was launched in manual mode. They switched to auto mode after 2nd gear.
That's based on something I read in a thread on here somewhere. I don't have any personal experience as of yet. I also don't know how much is shared between the IS F and the RC F. I know the engine block is the same, but they have different internals and different rev limits.
That's based on something I read in a thread on here somewhere. I don't have any personal experience as of yet. I also don't know how much is shared between the IS F and the RC F. I know the engine block is the same, but they have different internals and different rev limits.
11-21-16, 07:06 PM
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I can't help ya there. I only know a little bit about my RC F and really nothing about the IS F. From what I read about the RC F the times between auto and manual mode appear to be pretty similar. But manual mode wins by a hair. In both runs the car was launched in manual mode. They switched to auto mode after 2nd gear.
That's based on something I read in a thread on here somewhere. I don't have any personal experience as of yet. I also don't know how much is shared between the IS F and the RC F. I know the engine block is the same, but they have different internals and different rev limits.
That's based on something I read in a thread on here somewhere. I don't have any personal experience as of yet. I also don't know how much is shared between the IS F and the RC F. I know the engine block is the same, but they have different internals and different rev limits.
My understanding is the converter is in full lock up in manual mode in my car and can not imagine it is different in your car. I have thought about launching in manual and then moving it over to auto but not sure if this will screw with any of the mapping that changes in the two modes and slow the car up. Ideal would be launch in manual, move over to auto, and then back to manual so you can ride 5th out instead of it shifting to sixth at the 1000ft box which is what happens in auto mode and has to cost a little bit of et..
11-21-16, 07:13 PM
#35
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My understanding is the converter is in full lock up in manual mode in my car and can not imagine it is different in your car. I have thought about launching in manual and then moving it over to auto but not sure if this will screw with any of the mapping that changes in the two modes and slow the car up. Ideal would be launch in manual, move over to auto, and then back to manual so you can ride 5th out instead of it shifting to sixth at the 1000ft box which is what happens in auto mode and has to cost a little bit of et..
11-21-16, 07:21 PM
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11-21-16, 07:23 PM
#37
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It is 4th gear not 5th. Fat fingered it. lol Lexus spent a lot of time on this trans to be able to call it the fastest shifting auto in a street car so I would think they would still be using it.
11-21-16, 07:41 PM
#38
Lead Lap
Okay, I thought you might have made an error. I've never owned a sports car that needed 5th gear before 115 mph.
I believe my transmission doesn't lock the converter until 2nd gear as well. I also have 8 gears, just to see if we may have the same tranny.
I believe my transmission doesn't lock the converter until 2nd gear as well. I also have 8 gears, just to see if we may have the same tranny.
11-22-16, 01:30 PM
#42
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It's good to know that the tranny is the same. I plan to boost at some point so it will be helpful that the IS F has been using it since 2008.
11-23-16, 02:09 PM
#44
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Using density altitude adjustments from yesterday and the runs before when it was warmer it would have made my previous stock best of 12.82 drop to a 12.79 using yesterdays weather. This was using the track elevation of 19 feet above sea level, air temp of 65 degrees from yesterday, barometric pressure of 30.25, and 21% humidity to give me a DA of 698 feet or 98.73% air density. Very good conditions for sure but in a mostly stock car the ideal weather was only worth .03 ( three one hundredths ) of a second. The more mods or power you have the greater the increase from the good weather yesterday.
And BTW - I drag raced for many years starting in the early 90's - IHRA Top Sportsman class. I used DA religiously to dial my car.
11-23-16, 08:41 PM
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I'm confused - 65F, 30.25" and 21%RH is actually 99 feet DA at Bradenton. Also looks like DA on your baseline run was ~1700' That's certainly going to make make more than .03s difference. More like 3 tenths. I posted more detail on the other thread just trying to make sure I understand how you are calculating DA.
And BTW - I drag raced for many years starting in the early 90's - IHRA Top Sportsman class. I used DA religiously to dial my car.
And BTW - I drag raced for many years starting in the early 90's - IHRA Top Sportsman class. I used DA religiously to dial my car.
The numbers I used were taken at the track both times from
a bracket racer I kind of know. I did punch in the wrong weather for that run so thanks. My last run around 3:00 was 70.1 , 30.02, and 25, I need to correct that, thanks . I put the early weather with a manual mode run that I left from idle and it was a high 12.6. My spread from
my first stock runs to my recent ones was never more than 500. My baselines were no where near 1700 ft as I went late in the evening when it had cooled off. A 500 spread is equal to roughly .10 on a good day on a non forced induction or high powered car as you know. Correct me if my math is off but I checked it a few different ways.
Last edited by ISFSCOTT; 11-23-16 at 08:49 PM.