XutvJet

Na, I understand that, we all post our bests, regardless of conditions. I was just saying to somewhat accurately gauge gains/losses of a modification, one should correct their times to SAE conditions to do a comparison.


I used to be an avid drag racer and it always irritated me when people would make wild claims about their catback, intake, *insert worthless modification* and how it dropped their ET by .4 of a second and gained 3mph. BUT in reality, the gains solely came from a better 60 foot and much better atmospheric conditions. BTW, I'm not saying you're doing such a thing.


ISF owners should really inform themselves about DA and also come to face the truth that some tracks are just faster/quicker than others for no scientific reason at all. I've raced all over the US and found this to be frustratingly true. The same even goes for lanes at the strip. One lane always seems to kick out slightly better ET/MPH than the other for no apparent reason.


DA has a massive impact on a car's performance, especially when the DA goes negative. It's free power and the cheapest modification out there With the same car, modifications, 60 foot, and most importantly track, I could a see a difference of .6 seconds and 6mph between running on a 90 degree day with 5,000' DA vs a more typical day with 1,000' DA.


It just pays to be informed and it will take the sting out when most ISF owners realize that their car with the same mods is "only" going 12.5-12.7s@112-114mph with the same 60 foot, but at a different track and under more common DA like 1,000'-2,000'.

Drok149

^^^^ I understand where your coming from and there are just so many factors to consider with how much a mod helps. One factor you haven't considered is the KCLV, which is huge when calculating how much a mod helps. I was just giving my opinion on the tune and regardless of DA I think it has proven it works very well.

Ltaboso

I was wondering why this thread died....after learning about the low KCVL=low dyno numbers and finding a solution for this (reset again and re-learn the car with high load),i dont see anymore feedbacks if the car imlroved or still not.....any more results?

Mach Tuck

What are you guys using to monitor these values? I have an Android. What app and what plug in OBDII BT device?

One side question regarding the BT OBDII devices: can they run the Toyota/Lexus vehicle settings like the Techstream cable can do?

liquidtek

The only way to check the KVCL is with techstream on a laptop, Techstream related options & information wont show on basic phone apps. Phone apps are good for reading intake temps, timing ect.

Rickna

iTrader: (3)

BT will connect with an ELM 327 device, but it will not provide all functions of TS.

ShadowISF

iTrader: (10)

FINALLY got to the dyno!

Short and sweet: Thanks to some members here for helping me out with this process and especially Josh @ Meraki Autoworks and Rafi and Simon @ RR-Racing for making this possible.

Here are the before and after tune results:

BEFORE ( I / H / E ) - 399.41 max whp 382.32 max torque

After ( I / H / E / RR TUNE) - 414.41 max whp 391.39 max torque

15 WHP GAIN

The tune WORKS!

Ltaboso

which redline did you get? 6800? 7200?

ShadowISF

iTrader: (10)

7200 redline.

Meraki Autoworks

iTrader: (8)

Remember to dyno in 6TH gear guys!!!

& you're welcome Jason. :P

-Josh

MileHIFcar

Is the Transmission part fixed yet where the converter will stay locked up to the 7k or 7.2k redline without disengaging at 6800 with the tune??

ShadowISF

iTrader: (10)

That has not been fixed yet. I believe RR Racing is still working on it.

MileHIFcar

^^^Ok thx....

bnizzle87

Great numbers, Jason! Without the OBD handheld to tune the F, having the physical ECU tuned is the only option- and it works as advertised! For those that don't have the ECU tuned yet, it might not be a bad idea to purchase it and the new RR Racing intake together so you only need to have it retuned once. Outside of a SC, this is probably as maxed out as the IS F will get, which is more than what we as owners could have ever expected a few years back.

ShadowISF

iTrader: (10)

Thanks Brian!

Yeah it wasn't that bad sending out the ECU. It was a bit scary but RR Racing has very good communication and their turn around time was ridiculously fast. I sent mine in on a Friday. They tuned the ECU and shipped it out Saturday. I got it back Monday.

Also, as what Brian said, for those of you who are thinking about getting the tune and are in southern cali, you should get the rr intake and tune together or you can just get the tune by itself. Apparently, RR racing will be able to tune the ECUs when they come for the Lexus of Escondido meet, so you don't have to send them out.