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This past weekend I decided to put my 3IS AWD car on the dyno to see what the car makes. I have 74,000 miles and have the RR Tune and Apexi Midpipe and F-Sport axle back. We did 3 runs all in 3rd and 4th gear. Car peaked at 256whp and 236tq which is around ballpark of what I expected (transmission slipped or something at 7000RPM in 4th not sure why). Was hoping to get closer to 264whp as RR states on their website.
I have a friend who also had a bone stock 2014 IS350 AWD and made the 251whp on the same mustang Dyno which is kind of surprising to me. Thought the tune and cat-back exhaust would make more power when compared to a bone stock IS350.
Kinda sounds like your higher numbers over your friends are due to the exhaust and not the tune.
Makes you wonder if you took off the exhaust and went back to the stock system would you get the same numbers as your friends stock IS...then that calls into question the tune...is it actually doing anything.
Does the tune maybe need to be tweaked for your exhaust setup? If it isn't already.
While I'm not disagreeing with the disappointment in not seeing higher numbers over stock, two things. One, did your friend do the dyno run on the same day? What was the humidity and outside temperature at the time you both did runs? Also, doing a before/after dyno chart would probably give you a more accurate comparison, since already being an is350, there is only so much power that can be unlocked in a simple canned tune with minor exhaust upgrades. Better question is how does the powerband across the whole pull look compared to stock, as well as your friends stock. Ideally, you would have done a run before the tune, then after. Peak numbers provide very little useful data other than bragging rights. It would be better to see how your overall power looks now, especially if you had your rev limit extended to 7200. The biggest comparison data that is missing is an initial pull from your non-tuned car.
Kinda sounds like your higher numbers over your friends are due to the exhaust and not the tune.
Makes you wonder if you took off the exhaust and went back to the stock system would you get the same numbers as your friends stock IS...then that calls into question the tune...is it actually doing anything.
Does the tune maybe need to be tweaked for your exhaust setup? If it isn't already.
Tune isn't modified for the exhaust. Its standard out of the box. If anything an exhaust should help make power on top of the tune. On the street, car pulls hard- have beaten A6, STI, G37 (all stock of course) from 60 rolls. I am wondering if my bigger wheels are affecting the results.
Originally Posted by cliffhokie
While I'm not disagreeing with the disappointment in not seeing higher numbers over stock, two things. One, did your friend do the dyno run on the same day? What was the humidity and outside temperature at the time you both did runs? Also, doing a before/after dyno chart would probably give you a more accurate comparison, since already being an is350, there is only so much power that can be unlocked in a simple canned tune with minor exhaust upgrades. Better question is how does the powerband across the whole pull look compared to stock, as well as your friends stock. Ideally, you would have done a run before the tune, then after. Peak numbers provide very little useful data other than bragging rights. It would be better to see how your overall power looks now, especially if you had your rev limit extended to 7200. The biggest comparison data that is missing is an initial pull from your non-tuned car.
It was a sunny dry day. Dynoed at 10am. Powerband peaks around 6000-6800.
Originally Posted by RageRacerM
stock intake?
Yes stock intake. Don't think anything other than a boxed intake is going to "add HP" in our cars.
I'm sure you know the deal. Dynos don't mean much unless you compare back to back runs on the same day. Either compared with another car OR your car vs. your car w/ mods.
The dyno can read 3 horsepower or 3,000 horsepower. All dynos will read different so one reading on one car doesn't tell anyone much. It just tells you the # that dyno is calibrated to read at.
Back in the day my mostly stock 3 series (330 5 manual) dynoed at something like 159 rwhp w/ a tune. everyone made fun of me for that reading. saying my car was super slow and something wrong with it. but they failed to know how dynos *really* work and what they're used for. this particular dyno was known for reading low.
anyway my car would smoke stock M3s on highway pulls on cars that dynoed much higher (around 200rwhp)
It's just that you can't really compare or evaluate cars based on a single reading of a single dyno.
Dynos are best used as a tuning tool on a single car. Nothing more.
Unless you have an 800 beast which will read "high" on any dyno.
TL;dr don't use dynos too hard as a jerk-off tool or bragging tool. it's just for evaluative purposes comparing your car vs. your own car after mods.
I thought mustang dyno produced lower readings compared to a dyno jet ?
Mustang dynos are known for reading a bit low, but don't expect some crazy discrepancy. I wouldn't expect more than a 6-8hp margin from a dynojet dyno.
Mustang dynos are known for reading a bit low, but don't expect some crazy discrepancy. I wouldn't expect more than a 6-8hp margin from a dynojet dyno.
Welp that would put him in the 262-264 horsepower that he was looking for lol
09-04-19, 08:10 AM
Got my 2015 IS350 on the Dyno
