Maybe because you are on the drag stripe and with (quicker) reference. With no reference, I feel the car pulls strongly up to 100mph, flattens above but still pulling well in the 110+ range.

 

It's gotta be that wind drag because it's still making good power. I've seen a 2.0T Accord 6MT hit 109 @ 13.11 just being flashed and bolted, which is insane. And I've read that the 6MT isn't any faster than the 10AT in a straight line because the 10AT is already so efficient.

 

My RDX feels like it hits a brick wall at 110MPH. It’s almost like there’s an invisible force preventing it from going faster.

/sarcasm

 

🤣🤣🤣

 

Speed limiter at 111 I think in factory’s ecu programming

 

Toronto Motorsports Park. Bone stock.
14.7 sec 1/4 mile @ 95Mph. Bone stock with 3500km, 3/4 tank of Esso 91 Octane gas, cooler full of Drinks and food in the hatch. For best results turn off engine auto shut off, traction/stability control, set to sport+ and keep in auto shift. No brake boosting required. Just floor it when it's time. This car will not allow you to build boost. I only made 2 passes and the feeling was I could have run it all day yesterday, and 14.7 @ 95 was what it was going to run all day.

 

Not bad! That beats C&D's recorded time by half a second and traps 2mph higher.

 

Try it yourself. I've heard anything from 111 to 113MPH. The needle doesn't go a mm over the 110 mark on the speedo.

 

Nice! My friends messaged me to say that another RDX was on the track! At least now I know what my RDX will do stock.
I'm going to go back to the track when the temperature dips down to see if I can touch 13's.

 

Either their car was heat soaked or they had a lemon. The release of the C&D article was August 2018 so chances are good it was probably heat soaked. Yesterday was a decent day for drag racing turbo cars with temperatures @ 19 degrees C. Mine is a 2020 A Spec with SHAWD so Honda may have since tweaked their tune too.

 

nice runs! both canada. whats the elevation?? maybe check the Density Altitude. also can play apart in how much power and how fast you run.

our fun run. DA was pretty bad kinda humid from a storm rolling in. DA was over 3000 that night. times not too fast on paper

https://www.youtube.com/watch?v=aovwrZSRyrE

 

Toronto Motorsports Park

Density Altitude: 1984 feet
Relative Density: 94.32 %

 

14.1@98mph not bad for this 4,000lbs SUV. 2019 RDX Aspec FWD

 

Nice R/T! I'm hoping to be in the mid 13s this season.
Ktuner stage 2, Prl catless downpipe, intercooler and MSD coils...

 

You all ready ran 13.9?
Man that “draggy” GPS is very accurate too

 

What MSD coils are you using? Are they model MSD 82494? Thanks in advance.

 

Yes sir! 👌👌👌

 

Can you measure any difference in ET or mph due to the coils alone?

 

No problem 😊
I will take some logs.👌

 

Back in the day with small block chevs, those coils (ancestors) would let the engine rev a little further.

 

I found this very interesting. First, I know that without DA Adjusting time/speed, its hard to directly compare two races. Second, are there any other FWD slips? I ask because based on this timeslip, the FWD RDX traps about 4 mph faster than the SH AWD Acura. (Are you stock?)

According to the Acura website, the FWD RDXs weigh about 240 pounds less than the SH AWD. That lower weight helps speed, but not enough to account for a 4 mph difference. I wonder how much the AWD’s extra parasitic loss plays into this. The math would suggest the SH AWD RDX has about 15 wheel horsepower less than the FWD RDX. Does that number make sense? Curious if anyone has discussed this.

 

I found this very interesting. First, I know that without DA Adjusting time/speed, its hard to directly compare two races. Second, are there any other FWD slips? I ask because based on this timeslip, the FWD RDX traps about 4 mph faster than the SH AWD Acura. (Are you stock?)

According to the Acura website, the FWD RDXs weigh about 240 pounds less than the SH AWD. That lower weight helps speed, but not enough to account for a 4 mph difference. I wonder how much the AWD’s extra parasitic loss plays into this. The math would suggest the SH AWD RDX has about 15 wheel horsepower less than the FWD RDX. Does that number make sense? Curious if anyone discussed this.

 

Moderator, please delete duplicate post. Thanks.

 

I'm not stock, I'm just on Ktuner stage 2.
but I wasn't prepared for the test and tune night, I was originally going just to be a spectator!
I had stuff in the back, almost a full tank of gas, spare tire and baby seat etc.
will be more prepared the year coming up.

 

Yeah, that extra weight likely hurt your RDX’s acceleration a tiny bit and did not reflect its full potential. But it is tuned and has a lot more power than stock to compensate. Returning to my initial thought, with a Stage 2 tune (plus an extra 100 lbs or so), your AWD RDX trapped at 95 mph and JuamPs69’s stock FWD trapped at almost 99 mph, with 20” wheels. So, is Juam really stock? Or, did he possibly race at 40°F and needs to density altitude adjust his speed for a proper comparison? (His time slip is dated March 10, 2021 and it could have been cold on the day where he raced). Or, does the SH AWD system significantly decrease wheel horsepower? If yes, by how much? A 4-mph delta equates to a fair amount of horsepower.

 

I'm in Canada 🇨🇦 so in the summer its super hot and humid. I know it was a warm evening and I was doing back to back runs
I think if i took the time to cool down, the runs would probably would be in the 13's. 🤷‍♂️
But I don't want to guess because there are why to many variables that come into play.
my personal goals for this season is to be in the low 13's.
After that I'm trading her in for something that is faster.

 

I posted both, actual time slip and a comparison with my draggy “time slip”. This happened in Central Florida. No I am not stock, these RDX’s are low 15 to high 14 secs stock. FWD will always trap higher than a AWD. There is a AWD Aspec with the same set up as mine and the draggy times are close to 93mph. So regardless of stock or tune there will always be a difference in trap speed; weight also plays a factor, but the main problem with these engines is heat soak. I lost an avg of .5mph trap speed with 20 degrees warmer and DA of 2,500 vs the draggy slip posted here.

I have a Hondata Tune with PRL downpipe.