Tell me how to do a WOT.
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Northstar Engines and System Technical Discussion Discussion, Tell me how to do a WOT. in Cadillac Engine Technical Discussion; I read how to do a WOT on the CadillacOwners.com webpage, but I think I am confused. How exactly should ...
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    dp102288's Avatar
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    Question Tell me how to do a WOT.

    I read how to do a WOT on the CadillacOwners.com webpage, but I think I am confused.

    How exactly should it be done? I would like step by step instructions. From what I understand, I should let the engine warm up, and then take it to the highway. Then bring it up to about 55 mph. Then I should drop it in second gear, and floor it. Then let off the gas.

    This seems so unsafe to me. I am afraid that by dropping it in second, the RPMs will jump too fast, and that could crack my N*. Then floor it?! This thing kills me when I put it half way down. And what do I have in my ETC, and L37 or LD8?

    Is this what I have to do? Am I missing something? I really would like to do one, as I read that it is good for the eninge rings, and cleans out some of the carbon.

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    Re: Tell me how to do a WOT.

    WOT is just when you depress the accelerator fully.

    In other words, FLOOR IT! It shouldn't matter what gear its in, as the whole point of the WOT is just to make sure the engine gets clear of all that carbon build up. The N* is a performance engine, and every so often, it needs to be taken to its limits. You'll see lots of cases of old people bringing in their northstar devilles, etc. and the engine will have tons of build up because old people never do WOTs...

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    Re: Tell me how to do a WOT.

    Here's what you do, drive the car around for like 20 minutes or so. make sure the coolant needle is straight up, meaning around 200 degrees or so. then make sure you are on an empty road, say highway speed limit 55 or 65. (i do mine on 55 highways) but if you are particular about your speed hop on a 65mph speed limit one.

    once on your desired road/highway make sure no one is behind you or around you. (i usually do my WOT's in the left hand lane) then once the conditions are right, get the speedometer to 55. once its at 55. put the car into 2nd gear, and put your pedal to the metal, in other words give your calve muscle a stretch haha. look in your rear view mirror to see if there is any brown soot coming from the exhaust.

    keep your foot pressed to the floor until your tachometer hits the red zone and automatically down shifts. you will feel this shift. after you feel this shift, let completely off the gas and let the car break itself back down to 55 mph. once at 55 press your gas peddle to the floor and check again for brown soot coming out the exhaust, keep repeating this procedure until there is no soot coming out.

    once there is no soot coming out you have likely gave your engine and exhaust a good cleaning. do this cleaning/fun procedure about once a week, i say. some recommend more, some recommend less. once a week is fine for me.

    oh btw, your engine is the L37 engine,

    here is some info. about your engine from wikipedia.


    "The L37 was the original Northstar. It is tuned for responsiveness and power, while the later LD8 is designed for more sedate use. The L37 code has been used on all high-output tranverse Northstars, even as the exact engine specifications evolved.

    The original L37 was specified at 290 hp (216 kW), but 1993 production examples were rated at 295 hp (220 kW). The engine topped out at 300 hp (224 kW) from 1996 through 2002 on the STS and ETC models, making these some of the most powerful front wheel drive cars ever built, the most powerful title still belonging to the first generation (1966-70) Oldsmobile Toronado with 385 hp/475 ft·lbf. in 1966-67 (425 ci, 7.0 L) and 375 hp/510 ft·lbf (400 hp/ 500 ft·lbf. with W-34 option code) in the 1968-70 (455 ci, 7.5 L) Toronado."



    if you have any questions just ask

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    Re: Tell me how to do a WOT.

    There really isn't any need to do WOT at cruising speeds. When I first got my car, it was carboned up. I got rid of the carbon, with WOT, on highway on ramps, and from traffic lights. The only need, is to get the RPM's up. You can easily do this in first gear, from a stop or a roll, as you can from 55-65. When enterring a highway on ramp, let's say RTE 287, as soon as you get clear, floor it. If you are carboned up, you will hear what sounds similar to pre-ignition, and if you look in the rear view mirror, you will see a grey/black smoke from the exhaust. If you hear and see nothing, your engine is in good shape, and you can stop doing it. Now you can do WOT in succession, until it is cleared, or you can do as I do, and do it over several days (if the engine is heavily carboned). The key is to get the engine clear of carbon. There are may ways to do it.

    Don

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    Re: Tell me how to do a WOT.

    Quote Originally Posted by fpmesiIII
    once its at 55. put the car into 2nd gear
    This will shoot the RPMs very high won't it? I am scared of the sudden increase will hurt something. Is this safe?

    Quote Originally Posted by fpmesiIII
    keep your foot pressed to the floor until your tachometer hits the red zone and automatically down shifts. you will feel this shift.
    Downshift? I though in second the car only stays in second. Please elaborate.

    Quote Originally Posted by Dadillac
    WOT, on highway on ramps, and from traffic lights
    You just floored it?! Wouldn't this make my tires screech and then the traction control will kick in? I can't press the pedal halfway without some kind screeching my tires.


    Could I just rev the engine in my driveway? Would this have the same effect, or does the car needs to have the transmission engaged to create the high pressures?

    I am sure my engine has a lot of carbon in it, I have never done it (7+ years ownership). Will the smoke/soot create a specticle on the roadway?

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    Re: Tell me how to do a WOT.

    Reving it in the driveway will not work. First off it will hit the rev limiter at about 4K I believe. Secondly, it needs to be under load.

    Placing the gear selector in 2nd will not keep it in second. The car is smart enough to shift when it gets to red line.

    Owners manual says you can down shift into second up to 50 or 55 MPH I believe. Check it to be sure.

    Just start out in second. Slowly mash your foot into it and you should not spin the tires. I nail mine after I get it rolling and never spin them. After it shifts, let it back down. I doubt you create a spectical. It won't smoke that much. Your rapid acceleration will be more of a spectical than the smoke or soot.

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    Re: Tell me how to do a WOT.

    all we are saying is we cant force you to do it. i mean i would do it for you. but in the end you just have to overcome your fear, and Just Do It.

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    Re: Tell me how to do a WOT.

    Ooooooooooh. The car shall shift. Good, one less problem. I will put it into second around 45 to avoid any other problems. I shall try it on Route 1 this afternoon. I will report back soon with results.

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    Re: Tell me how to do a WOT.

    On another note here, when you MANUALLY shift into 2nd at about 55 or so, then floor it, the engine will naturally rev up higher as your speed increases. At just about the redline or a little over it, the engine/trans will UPSHIFT into 3rd, not DOWNSHIFT as a previous poster noted...

    Its important to realise the engine will AUTOMATICALLY upshift to 3rd when you hit the redline.

    Then you let off the gas, the car will slow a bit and then DOWNSHIFT back into 2nd gear. Its this 3rd to 2nd that puts a nice vacuum load on the cylinders and helps to purge any built up carbon and other deposits.Let the speed fall again to about 50-60 and hit the floor again. The engine will rev higher, the car will take off, and do the same thing - once the revs hit redline, it will AUTOMATICALLY shift up in to 3rd gear.

    Rinse and Repeat, as the shampoo says. If there is a lot of crud in the engine, you'll see some white or gray smoke out the back end. If the engine is relatively clean, you may not see anything.

    Depending on the state of your car, you may want to do this once every week, twice a month, or every other day, depending on need and the adrenaline rush you get. And local law enforcement coverage, although one good thing about this is that if you do it on a 65mph highway, you really shouldn't have too much to worry about in that regard.

    Do not worry about the engine blowing itself up. This will not happen UNLESS there is already a failure imminent anyway, which would happen whether you are doing 20 or 70.

    As our guru has noted in the past, Northstars are stress tested by running them at REDLINE for 36 hours straight. A few seconds will not harm your engine.

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    Re: Tell me how to do a WOT.

    thanks for a complete explaination of the WOT. i never realized the UP-SHIFT thing, guess i never really let it get to that point before.

    some one might stickie this tread.........

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    Re: Tell me how to do a WOT.

    "thanks for a complete explaination of the WOT. i never realized the UP-SHIFT thing, guess i never really let it get to that point before.

    some one might stickie this tread........."


    the technical archives states the procedure to a T. but this is a good thread for people who want a little more comfort on doing WOT's.

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    Re: Tell me how to do a WOT.

    SUCESS!! I have seen the smoke, and it was great. Engine must be clean as a whistle as I ran it about 5 times, first 2 were full of smoke. I got my shot when I was on the Turnpike/I95.

    I am glad everyone here had ridded my fear of this, I am a better person because of it. I now realize the sheer amount of power living in the NorthStar. Life is good indeed. I never drove the car like that before, and we both wanted more.

    On the downside, I find myself now driving faster on every single road because I need the speed. I am hooked on this car again, like the first time I drove it. My blood was pumping, and my pressure was up. I was alert and confident that the Caddy would look after me, and I it. I was doing 45 past a closed school tonight, I've got to watch it.

    Thank you everyone. You are a truly great bunch.

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    WOTMODE is offline Cadillac Owners Fanatic
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    Re: Tell me how to do a WOT.

    WOTmode. My name says it all. I'm at 170k miles and floor it daily. These motors can handle 600hp on a stock lower end. Going to red line does no harm.

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    Re: Tell me how to do a WOT.

    Yeah, be carfull. Trying to explain this to a cop will just get you a .

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    Re: Tell me how to do a WOT.

    just took a look at the tech archive on WOT

    perhaps, if a stickie isn't in order, updating the archive is, 'cause there's no mention of the up-shift when holding the tranny in second - it specifies taking it up to an appropriate red-line and letting off at that point to provide the high vacume condition required to clear things out.

    if fact, it says put it in secound to take shifting out of the question "...if you are woried about hurting it..."


    like i said before, first time i've heard about the up-shift out of a tranny held in second.

    i try not to doubt - but to understand

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