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This does appear to be a more serious approach to an actual sports car, vs the touring-like Supra of the 90s. From the descriptions, it'll carve up some serious corners!
Here are my alignment specs from back in April 2017. I had the front toe setting adjusted to 0.00 and ever since then, my front tires have been wearing down evenly for the first time ever (no more throwing out front tires prematurely every 15k miles).
I had some free time earlier today so I decided to have some fun by recording a few revving videos on my phone. I realized I had yet to make this type of video since adding the Megan Midpipes and becoming an "FBO+Tune" IS350.
I'm glad my efforts to find an abandoned location (RIP Toys R Us) to do those revving videos paid off. 😁
From watching those videos a few times, I felt that my phone mic didn't truly capture the tone and loudness of my setup so I went ahead and ordered an omnidirectional mic accessory. I'll experiment to see if it will better capture to exhaust notes in some future revving and WOT videos. 👍
Since having my IS350 for over 12 years I've had lots of fun with my daily drives in it. Though the mileage has been relatively low each year, the odometer is slowly creeping to a certain milestone....
Though I haven't posted much on datalogs in a while, I recently have been back to collecting more data as my OCD continues to be on overdrive as I'm still debating on which of the performance intake pipes should be my permanent setup (3IS F-Sport Intake w/ Sound Generator or 2IS JoeZ intake).
I would prefer to keep the 3IS F-sport intake as I enjoy the subtle burble from the sound generator at high RPMs and would assume that the 3.00" inner diameter of the pipe would hold more volume of air (vice the 2.75" inner diameter of the JoeZ intake) but the JoeZ intake may provide a higher velocity of air flow as it is slightly narrower and without any potential deviation of airflow to a separate chamber (ala the sound generator).
With a similar Intake Air Temperature (IAT) range for both pipes (mid-60s to lower 70s), both the JoeZ and 3IS F-Sport intake pipes varied from 242-246 g/s (with the JoeZ being slightly more consistent on peak MAF g/s which was a similar observation I had a few months back).
However, this morning provided my highest recorded MAF g/s ever as IATs were in the high 50s/low 60s. I took the IS350 on the freeway and did a couple of 3rd gear pulls and managed to consistently record the following with the JoeZ intake pipe:
These MAF readings were significantly higher than any of my previous records (246.5 g/s). As the weather will be equally cool tomorrow morning, I plan on swapping out the JoeZ intake pipe for the 3IS F-Sport pipe and will record my new data under these cooler temps. Hopefully I'll reach a final conclusion on which of the two pipes to keep as my permanent setup.
Conclusion: JoeZ Intake pipe vs 3IS F-Sport Intake pipe
My MAF g/s data analysis between the 3IS F-Sport intake pipe and 2IS JoeZ intake pipe is essentially complete. Within the past two days, I was able to do multiple 3rd gear pulls at WOT testing both pipes in nearly the same weather conditions. Below are some WOT data points collected on the Intake Air Temp (IAT) and recorded MAF g/s at RPMs in the 7000-7200 range:
My impression of the data is that the JoeZ intake pipe is pulling approx. 2-5 g/s more than the 3IS F-Sport intake pipe when IAT is near equal. Peak MAF g/s is also fairly consistent with each pull using the JoeZ intake pipe.
Though I don’t know what the listed MAF g/s readings would equate to in RWHP, based on this latest data as well as my previous research from 2018, there is a small but consistent gain in air flow with the JoeZ intake compared to the 3IS F-Sport Intake w/ sound generator.
I’ll likely still keep the 3IS F-Sport intake pipe as my daily setup specifically because of the sound generator but when it’s time to go back to the dyno or attend a track day event, the JoeZ intake pipe will go right back on.
EDIT (1/30):
For my personnel record keeping, I did some more WOT pulls on a different day to gather more MAF g/s results with the 3IS F-Sport Intake Pipe:
My MAF g/s data analysis between the 3IS F-Sport intake pipe and 2IS JoeZ intake pipe is essentially complete. Within the past two days, I was able to do multiple 3rd gear pulls at WOT testing both pipes in nearly the same weather conditions. Below are some WOT data points collected on the Intake Air Temp (IAT) and recorded MAF g/s at RPMs in the 7000-7200 range:
My impression of the data is that the JoeZ intake pipe is pulling approx. 2-5 g/s more than the 3IS F-Sport intake pipe when IAT is near equal. Peak MAF g/s is also fairly consistent with each pull using the JoeZ intake pipe.
Though I don’t know what the listed MAF g/s readings would equate to in RWHP, based on this latest data as well as my previous research from 2018, there is a small but consistent gain in air flow with the JoeZ intake compared to the 3IS F-Sport Intake w/ sound generator.
I’ll likely still keep the 3IS F-Sport intake pipe as my daily setup specifically because of the sound generator but when it’s time to go back to the dyno or attend a track day event, the JoeZ intake pipe will go right back on.
Yup, I'm using the OEM stock filter. I couldn't find any convincing evidence on the forums that a high-flow drop-in aftermarket filter would have any noticeable improvement in airflow compared to the stock filter. If my assessment is incorrect, I may look into a dry high-flow air filter to squeeze any last bit of air flow into the engine.
Yup, I'm using the OEM stock filter. I couldn't find any convincing evidence on the forums that a high-flow drop-in aftermarket filter would have any noticeable improvement in airflow compared to the stock filter. If my assessment is incorrect, I may look into a dry high-flow air filter to squeeze any last bit of air flow into the engine.
Yeah I've looked at "caymandive" threads he always gets the best results with oem filters. Both for IS350, and ISF.
Are you running the 'secondary' carbon air filter ?
Yes, the carbon filter is still part of the intake system. It was dyno proven in the past that removing the carbon filter will net zero gains and may in fact cause you to slightly lose horsepower as multiple dyno runs had shown (which I believe was also done by caymandive).
01-15-19, 07:32 AM
