4k shutoff

Topic: 4k shutoff (Read 5056 times) previous topic - next topic

Reply #45 – June 08, 2009, 02:10:49 AM

The AOD will stay in od under full throttle at some point. A couple of years ago I could have told you what point that was.

4k shutoff

Reply #46 – June 08, 2009, 10:45:45 AM

Quote from: Dougy_Fresh;276367

i do not have to go WOT to turn 4000rpms, not even 3/4.

this car HAS turned 6500rpm, my brother used to own it and i have personally seen it do it. granted it was in first gear.

Why is it that you think that the rest of us; who have been dealing with these particular car and their nuances for YEARS; are wrong and that you are the only one who is correct?

Accept the limitations of the car. Understand them. Improve upon them.

/thread

4k shutoff

Reply #47 – June 08, 2009, 08:15:57 PM

Quote from: Haystack;276389

The AOD will stay in od under full throttle at some point. A couple of years ago I could have told you what point that was.

Not a stock one...most shift kits won't allow it either...I know....in my old HO/AOD car, 5200rpm in 3rd...would NOT shift into OD...remember governor is 4700...eased off the throttle caught OD and eased back into the throttle...just trying to use enough throttle to maintain speed and it wouldn't happen, downshift right back into 3rd. It just DOESN'T happen.

And even if it did in his car, 150hp is not NEARLY enough to push 3500+ lbs to 160mph.

Sounds to me like a fish story...every time it's told, "it was this big!", your hands get a little further apart.

4k shutoff

Reply #48 – June 08, 2009, 08:42:17 PM

Quote from: Sick88Tbird;276557

Sounds to me like a fish story...every time it's told, "it was this big!", your hands get a little further apart.

Yeah, no, a stock AOD will not go into OD at WOT. 4th gear in an AOD is weak and Ford made it impossible to go into 4th at WOT for this reason. 4th is a fuel economy gear, and Ford (rightly) considers that if you wanted fuel economy you wouldn't have your foot to the floor.

Even if it COULD shift into OD (or if it was a T5 and you put it in fifth), you'd lose top end speed because the car doesn't have enough power to push through the air while being overdriven. Most cars, even cars far more powerful than these (which, sadly, would be "most" cars), achieve their highest speeds in the 1:1 gear (third in an AOD, 4th in a 5-or-6-speed). In other words they're drag limited, not redline limited.

1988 Birdcats are also electronically limited to 110MPH, as previously stated. I think I remember reading a car magazine article years ago in which they managed 123 MPH in an '87 5-speed Turbo Coupe. Anything near 160 mph in one of these isn't going to happen without serious power and aerodynamic enhancements - even if you built a drivetrain to go that fast the car likely wouldn't stay on the ground. Hell, I don't think a C4 Corvette would hit 160 (except the ZR1)...

4k shutoff

Reply #49 – June 08, 2009, 09:39:47 PM

Carm, the '85 Vette was the first one that GM stated could achieve 150+MPH-- 230 HP, a cD of .33 and a 3.07 ring gear out back..... The old ZR1's were capable of 180.

4k shutoff

Reply #50 – June 08, 2009, 10:25:42 PM

Quote from: TurboCoupe50;276369

Your tach's off, Ford EEC cut the fuel at 6250, it ain't going higher period unless you have a chip to increase the rev limiter... There ain't no maybe about the fuel cut, it's just like you turned off the ign sw...

the tach is correct, i had an aftermarket tach in it and just took it out last week because it was pointless to have.

i wish i had a way to prove my story to be true. the car will turn 4k in drive easily. with a 1:1 drive ratio, 2.73 gears, and 215/60-15's which have a rollout of 75" (roughly 24" diameter) that IS 104mph. it WOULD turn 3k EASILY in OD.

i'm not here to argue guys. i appreciate and value all of your input.

4k shutoff

Reply #51 – June 09, 2009, 05:39:55 PM

You did say that it was "without a doubt turning 4k in OD"...but your have now corrected your story to 4k in drive, a.k.a. 3rd gear, a.k.a. 1:1.

I'll buy that...the only way that thing could've been to 6500 however is in neutral and the tach needle continued to move even after fuel cut-off at 6250 due to the inertia in the tach...most tach needles can't stop on a dime...especially stockers and cheap junky ones.

4k shutoff

Reply #52 – June 09, 2009, 06:09:48 PM

i did turn 4k in OD on the night in question

4k shutoff

Reply #53 – June 09, 2009, 08:34:34 PM

OK, this thread is just getting stupid. We all know it's not possible for several reasons:

The fact (and these are facts, not opinion) that an AOD will not shift into OD at or anything near WOT
The fact that the 88 V6 and V8 cars have a speed limiter of 110MPH
The fact that a stock ECU pulls fuel at 6250 RPM [and the fact that an SO will not spin that fast anyway, fuel cutoff or not]
The fact that 155 horsepower will not propel a Thunderbird to anything close to 150MPH no matter what gear you're in (as the math would indicate had you indeed pulled 4K in OD).

These all prove that you didn't do it, but you continue to insist that you did it. This is like somebody getting caught red-handed robbing the Quickie-Mart and being shown the video of himself doing it but still denying it in the face of all evidence. The ONLY way your T-Bird approached 150MPH would be if you pushed it out of a helicopter at about 10000 feet. The ONLY ways your tach showed an accurate 6500 RPM would be if (A) You replaced the engine with a Vtec Honda or some other much-more-modern engine than your lo-po 5.0 lump or (B) You have a manual transmission and dropped it into first at 100MPH (and even then you'd likely just drag the rear wheels instead of spinning the engine that fast).

Go ahead, keep bullshiznitting those who know much better. We'll just have a laugh at your expense and never take anything you say in future seriously anyway...

Now, as Paul said, and since this is just insulting the intelligence of this forum as a whole...

[/thread]