darksom1

Yeah, he does. But I don't know if it was in at the time he did the videos. The videos are in You Tube, just do a search. But there was a big argument about that on here with TLFourplay on this same subject. That's why he did the video to prove his point. Videos are cool as hell!!!!

darksom1

These are TLFourplay's vids for those of you who didn't see them:

Video1
Video2
Video3

Enjoy! I did!

Xpditor

TLFourplay is convinced he has a speed limiter and the video seems to substantiate that on his car. It was he to whom I referred when I said some members and some magazines believe there is a speed limiter. He repeated that to me as recently as yesterday in another thread.

On the top speed threads (we have a couple of them here), no one else has mentioned a speed limiter (IIRC) but talk about reaching top speed in 4th (AT) or 5th (MT), drag limited, at about 152 MPH. They also mention that it takes some time and distance to get up there.

One or two magazines that tested the TL have made a notation on their test data that it is top speed governed. I have been unable to confirm it in the Acura Shop Manual or Owner's Manual and, and this point, I'm not buying it. Other magazines have said the TL's top speed is drag limited to about 150-155.

What I DO know is that speed limiters are usually installed so that you don't overrun the rating of the OEM tires. That would present a legal liability on the manufacturer. Ergo, the Cadillac DTS is speed limited to 111 MPH because they have cheaper, lower rated tires. When you hit 111, the MID tells you such. I know. I have rented them and run the wheels off them on the Nevada desert.

On the TL, the OEM tires carry a "W" rating for sustained speeds of 165 MPH. We have a Coefficient of Drag (Cd) of .29 which is the same as a C5 Corvette.

Theoretically, and experientially, with the TL's horsepower and gearing (not TL-S), the top speed should be around 150 so there is no need for a speed limiter based on tire limits/liability.

I haven't heard anything about the 3.5L TL-S, but I would expect it to do a little better. Keeping in mind that it takes gobs of horsepower to make a material difference at the top end, I would expect the TL-S to perhaps hit 155-160 on a good day with a skinny driver, 2 gallons of gas, 45 psi in the tires, cool temperatures, and a wind at your back.

All that assumes that it is not one of those special models that has a speed limiter.

darksom1

Either TLFourplay is not reading this "mere mortal" automatic shifting thread (for that matter why the hell am I? ), or he has tired of this debate as he said before.

Xpditor

I think it's about 4 a.m. where he is.

I hate cars

Look at the rpms in the video. He was hitting the revlimiter not speed limiter. Then I guarantee an upshift into 6th would probably make him lose speed or at best maintain and not gain any more which again you guys would think was a speed limiter. Governors usually go hand in hand with tire ratings. I'm tempted after this argument to do a run on the 6% downhill grade on my way home this weekend just to prove it has no governor.

vara411

Wicked videos... the man's crazy!

Bearcat94

You look at the RPM's in Video #2 in Darksom's post. 6th Gear, ~5300 RPM, still pulling revs and speedo, then TLFourplay calls "fuel cut off" at ~152 MPH/~5300 RPM

If there is no top speed limiter why does the fuel cut off at ~5300 RPM in 6th gear?

So, are you and Xpditor saying:

It's not a "fuel cut off" and TLFourplay doesn't know it? Or,

The rev limiter kicks in at 6800 in all gears but 6th, where it kicks in at 5300? Or

That even though he was still pulling revs and felt the fuel cut off that is "drag limited"? Or,

That you don't care about evidence, just your own opinion?

Please explain it, because what I see in the video and what TLFourplay says he feels is EXACTLY like a top speed limiter.



BTW - That is a TL-S IIRC. 6MT.

Xpditor

Yes, I have acknowledged that. (see quote) His is a 2007 TL-S and his is the only top speed report I have seen on the Type-S.

All OTHER 3rd generation TLs have not reported a similar experience and no speed governor is discussed in the Acura Shop Manual for the 3.2L engine.

If that "special model" TL, the Type-S, has a speed governor..... as his appears to have, it has not been reported by other TL owners.

I have not researched the 2007 Shop Manual for the Type-S and will take his word for it that HIS car has one, as is (as I said) substantiated in the video.

My suppositions on the top speed of the 3.5L are assuming it is not governed but discussing its theoretical top speed, drag limited.

Do you think the German government might have required the limiter in order to import it into that country??? Nah.

I hate cars

The rpms were barely climbing. Speed had pretty much leveled off before he called limiter. The revlimiter was obvious in the 5th gear vids. When he was calling speed limiter in 6th, it sounded like the engine was still at WOT and not hitting any sort of limiter.

SHaFT7

if you really want to know if it is speed or rpm limited, just jack the car up in the front, and run it out to red in top gear.

note: not responsible if you're actually dumb enough to do this :P

bibledriver

What ever happened to a good ole dyno? Can you not just get a high speed dyno run? Anybody into dynoes around here?

bibledriver

And there is really only one spot that you can see the 6th gear pull.
Dang, looked like he was ready to add a hood ornament

Xpditor

I can hear the cut off in 5th. I can also see the RPMs dipping.

I can't hear it or see it in 6th. But, I can hear him calling "Fuel cutoff. Fuel cutoff."

He should know as he was there so I'm giving him the benefit of the doubt that his TL-S has a top speed governor.

I'm still looking for another one or for a factory acknowledgment of that fact.

TL_S_Driver

this is such crap. the auto shift from 1 to 2 gear is the only thing that i dont like about our SS. i wish i had the option of shifting it on my own but atleast i do see an adjustment at when it will shift depending on how hard i pressing on the gas pedal.

I hate cars

I'm not calling him a liar in any way. I believe he really thinks he's hitting a limiter and I'll be the first to apologize if I'm wrong. I know how frustrating people like me can be on the internet because I've posted some of my kill videos in my other car and had people doubt them. Like I said, the next time I go home (next Friday), I'm going to go ahead and run my 06 5AT on the huge downhill grade and confirm for myself that the 06s don't have a limiter. Not that this does anything for the TL-s debate.

I've topped mine out before at an indicated 152mph (probably in the upper 140s realistically) and while holding it there all it took was a barely percievable incline and speed would drop a few mph. Took a very slight corner and it dropped also.