Question about overdrive when racing from a roll...

[Bowhuntr11]

So...lets say your in overdrive and cruising on the highway...and all of the sudden a car wants to race you...

Do you just turn overdrive off and let it downshift then go?
Or just punch the pedal even when it is in overdrive?

 

[slammedi'am]

i always take it out of od

 

[ez112]

umm...punch.

But I never race on the highway. 70+mph isn't the best point to race with these hogs.

 

[steeltoe]

OD+WOT=bad news

 

[DSG04Lightning]

OD+WOT=bad news

yeah bad idea.....

 

[FordFanStan]

Roll racing is very hard on an auto trans. I would turn off OD or manually select proper gear depending on speed so it doesn't downshift. Second gear downshifts at about 60-75mph with 500+hp are especially hard on these trans'. FFS

Here is a very old (2005 iirc) video I took with a 60-130mph blast when I was at 445/490 with a downshift and OD off: [ame="http://vids.myspace.com/index.cfm?fuseaction=vids.individual&VideoID=1685421"]MySpaceTV Videos: 60-135mph blast, at 442hp/490tq by FordFanStan[/ame]

 

[BoosT_AddicT]

I think this was what took out my tranny... lol

Was cruising doing 45 in o/d then punched it a few times while playing with a stang.

Who would have thought. Took my o/d out. lol.

 

[MMShaggy]

Always take OD off.

These were from 70mph roll, and a 80mph roll. OD Off without a doubt. Not only is it bad for the tranny its even worse for your Rods.
[ame="http://www.youtube.com/watch?v=NC4YZCZq5ww"]YouTube - Cobra vs Lightning - Street[/ame]

 

[hillman]

do you get worse gas mileage with it off? i thought if you were just cruising around it keeps it from being in high rpms saving gas.

 

[themadgnome]

do you get worse gas mileage with it off? i thought if you were just cruising around it keeps it from being in high rpms saving gas.

Yes you will get much worse gas mileage, if your just cruising keep O/D on, but if you're going to be playing with the go-pedal, turn O/D off.

 

[SNCBOOM]

Yes you will get much worse gas mileage, if your just cruising keep O/D on, but if you're going to be playing with the go-pedal, turn O/D off.

Blah...the only time I have the OD on is if I'm on the highway :banana: Then again I drive a blazer on a day to day basis and maybe 2k miles on the truck per year so I'm always on the go pedal :beer:

 

[Taunto]

i hear ya... o/d+WOT is bad news bears

 

[ez112]

Welp ya learn something new everyday. Didn't know it was that bad on it. I don't feel like putting in transmission number 3. So I'll just do the shut off from now on.

But again. I don't roll race.

 

[LightningClint]

As others have said. TURN IT OFF

 

[1sweetSVT]

hmmm didnt know that. i just punch it

 

[crazy4ink]

I hadn't heard anything about O/D either, so whenever I have passed someone on the highway, I've always just punched it. So are the O/Ds prone to blowing out?

 

[throttle jockey]

As everyone knows, the rods are the weak link in stock block Lightnings. The violent tranny kickdown, huge rush of incoming air (which the MAF cannot accurately measure thereby creating a lean condition) and engine load that occurs when doing an OD WOT blast can be too much for the rods to handle, particularly as you approach the 450-500 RWHP mark which is generally cited as the breaking point for the stock powdered rods. If you are entering a roll race turn the OD off. Once the tranny has downshifted you are in a much more safe place.

Personally I don't even go straight to WOT once my truck has shifted down into 3rd... I prefer to roll into the throttle to minimize engine load thereby reducing the risk of catastrophic failure. Doing this usually means I have to play catch-up in a roll race since the other car is able to put a length or so on me, but I'd rather play it safe and lose the race knowing I most likely could walk them if I were to got immediately to WOT. Fortunately "Belle" has enough nut to usually come out on top.

Also, don't go into OD while making a WOT blast. The shift to OD creates a 1 to 1 ratio (IIRC) which is a huge load on the rods as well. You'll find that many people have joined the VBC doing OD WOT runs.

 

[crazy4ink]

^ Thanks. That sheds some light on things. :beer: