TinkySD

I decided to run a simulation with the new hondata dyno and see what kind of gains it came back with and I am very impressed what this new found top end power is going to do.

For comparison here is the stock torque curve I input from dyno:



Here are the numbers the sim says a stock tsx is capable of.



I had to toss in some modifiers for the heavy arse stock 17s which skews that data just a tad. Wheels actually affect the 0-60 most with their effect trailing off through the quartermile. I had to adjust for them by adding an equivalent of static weight which will affect the car in just the opposite manner. So we'd expect a slightly higher(within a tenth or two) 0-60 and a slightly lower 1/4 time which puts it right on the mark with what our users have been running at the track. 7-7.2 0-60 and 15.2-4 1/4.



Now we come to the hondata modified tsx. Since we want dyonjet whp numbers and not dynapac numbers I had to eyeball and make some slight adjustments. Thankfully, they had a stock tsx dyno overlayed on one of their graphs that made it easy to determine the change from stock and let me adjust the dyno accordingly. I would have to say I was cautious about the power gains and where possible erred on the side of less power advantage just to not over hype anything. By looking at the curve I think you can see the top end should be even stronger than it is here.




Here is the sim with a hondata tsx




6.07 seconds 0-60 and 14.68 in the 1/4! For the same reason I listed above, regarding the weight modifier I had to add, this should be more like 6.1-6.3 0-60 and 14.4-14.6 in the 1/4. Amazing numbers a full second off the 0-60 and almost that much off the 1/4 mile time. Of course these are just simulations, but I've found they are almost nearly always accurate.

Check out that top speed increase!

Now someone go out and get some light weight 17s and sticky tires and get some really scorching times!

sauceman

Hot damn, 155mph!

Honestly though, I believe it. Lately, with cold temperatures and air density, all I could do was maintain 222kph in 5th or 6th, at 5800 rpm. At those rpms, with the reflash, there are 25 lb-ft additionnal, and lots more torque/hp for another good 500rpm, so I'm not surprised the engine will ride it out for another 20 or so kph, especially in hot summer air (little density). 155mph=248kph...

Dan Martin

TinkyWinky

Very powerful simulations TinkySD.

A question though; is it possible to simulate/predict the gains in performance (e.g., 0-60) as a result of using lighter wheels? Would there be limit before wheel mass becomes negligible?

TinkySD

Definitely -- I'm going by stevtecs rule of thumb here(hopefully he'll comment shortly) after crunching lots of dynos and timeslips in cars in this torque range he found 1 lb of wheel mass is approximately = to 8lbs of static weight loss. That's why I had to bump the weight of the tsx when I ran the sims a couple hundred pounds(based of a standard 42lb wheel and tire package) Of course this isn't exact as witnessed by the slight deviation in the quartermile times from what we have recorded in timeslips.(15.3s) You can never nail down a dynamic variable(rotating mass ) in a completely accurate static way, but 8lbs per is pretty close.

MemRheins

Great Job

really like the look of those #'s

SteVTEC

Holy Hondata, Batman!

I want a TSX again now.


The 8:1 rule for wheel mass wasn't "my" rule of thumb though. I researched it elsewhere, simulated it on a few cars that have heavy wheels stock in cartest, and found it to be pretty accurate. It's still difficult to simulate though because on torque rich cars that can easily spin the wheels at any point in 1st gear it doesn't matter nearly as much. On a 2.4L TSX with 50lbs at the corners you definitely need to take it into account though. That's why when I made cartest predictions on performance before the car was out my numbers were fast. I didn't realize Acura was shipping these things with massive 50lb 17's. Thought they would have been lighter.

Anyhow, here's a gearing/dyno thrust analysis of my stock 1999 Maxima 5mt vs a stock TSX 6mt

Click for bigger pic


It's funny but despite way more torque and slightly less horsepower (190hp/205tq) my advantage on a TSX is actually at the top-end due to the gearing and not the low-end. One would think completely the opposite but that isn't true. Anyhow, with the I/H and Hondata adding all of that top-end along with the rev-limit extension I should now get walked pretty badly, especially from 3rd gear on up where the TSX can stay in the sweet spot. This is definitely a killer mod for the TSX. If/when it's out for the auto it should help those out a good bit also.

Jeff - you need to add the 60' Time to Distance measurement back into the sim so that you can keep an eye on the launches and make sure they're realistic. Other than that, nice work.

provench

My bonus arrives in about 2 weeks ... hmmmmm ... A-Spec suspension? Hondata? Intake? Headers? All of the above (and sleep in my car after my wife divorces me )

JTso

iTrader: (2)

All of the above! You only live once, but you can remarry! j/k

provench

Maybe I'll just price it out for fun

pawcio

I'm sure of one thing all of the above is on my list. The only question is how long
is it going to take me to save enough money for all that.

TinkyWinky

Thanks for the info. Wow, 1:8.

dom

Nice work Tinky now lets get some numbers for the AT.

CGTSX2004

iTrader: (1)

Tinky comes through once again with great info. Can't wait till the AT version becomes available...

Stokeless_TSX

The AT will pull a 16.2 in the 1/4 haha j/k

dom

Stock, yes. But 13.2 w/Hondata

Stokeless_TSX

yea if you get 13.2 in an AT then I will bow down to all AT owners if they can pull a 13.2 with just I/H/E and hondata.