2018 RevoSlot Discussion

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This topic contains 21 replies, has 5 voices, and was last updated by Radial TA Radial TA 7 months, 3 weeks ago.

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  • #11651
    BarkingSpyder
    BarkingSpyder
    Participant

    Let’s move our RevoSlot posts to this page.

    1) PINION PROBLEMS
    In addition to the slipping on the shaft, both Alejandro and I have experienced dramatic wearing of the teeth/vanes of the OEM pinions. Mine are actually warped, in a magnifying glass they look like jet engine fan blades. Take a look at yours – the inner part not touching the spur may appear thick and flat, whereas the one contacting the spur are thinning and may show stress fractures and bending. Alejandro says Alan has acknowledged this and the spares he is selling are 6.4mm with thicker teeth.

    If your gears are still loudly whining your pinion is probably still in good shape. If they are getting quiet they may be worn. My gears are quiet – but a few weeks ago I was hitting 3.9s; now I cannot break 4.01

    ... Fire up the willing engine, responding with a roar! Tires spitting gravel, I commit my weekly crime... Rush - Red Barchetta

    • This topic was modified 8 months, 3 weeks ago by BarkingSpyder BarkingSpyder.
    #11652

    ALEREAL3D
    Participant

    Ok folks let me be clear

    the problem with my pinion is NO EXCUSE NOW

    I knew the rules from the very beginning and I really don’t care if I have to lose a race for be in compliance with my fellow racers

    Marty already (and I am thankful for)  lend me,  and others front and rear tires (I only use a front set )

    Lets talk, ok,  but rules are rules and needs to be followed,   that will make us grow as a club

     

    Io Ditto

    #11653
    BarkingSpyder
    BarkingSpyder
    Participant

    The replacement pinions that Alan sells ‘look’ good. I have not installed one on my spare motor, but the teeth/vanes are nice and Pineapple/Coke-bottle shaped and with a dry fit outside the car appear to mesh well with the spur.  They also have a little ‘well’ on each end for a drop of Loctite Red or solder.  They are 6.4mm in diameter but have the rounded tip instead of the skinny sharp tip that Alan recommended rounding off (from the OEM 6.7m pinion).
    *****
    This is the OEM replacement from Pendle – appears to be what Alan sells (he appears out of stock today). 6.4mm OD – thick teeth P/N: RS212 RevoSlot Brass Pinion 12t 6.4mm
    https://www.pendleslotracing.co.uk/spares/pinions.html?manufacturer=475

    ... Fire up the willing engine, responding with a roar! Tires spitting gravel, I commit my weekly crime... Rush - Red Barchetta

    • This reply was modified 8 months, 3 weeks ago by BarkingSpyder BarkingSpyder.
    #11656
    chapracer65
    chapracer65
    Participant

    OK.

    • This reply was modified 8 months, 3 weeks ago by chapracer65 chapracer65.
    #11660
    porsche917
    porsche917
    Moderator

    Due to the lack of available 12t BRM pinions from 132Slotcars the rules have been amended to allow the Slot It 12t pinion, part number:  SIPS12.

    #11662
    chapracer65
    chapracer65
    Participant

    Comments about existing rules:

    The rules were posted a month before the race for all to see and comment on.  It was my own fault, because I was so busy, not to have read the rules sooner.  I set up the car at literally the last minute, and did not check it against the rules.

    I understand the issue with later production cars having smaller diameter front tires and the need to change the rules accordingly.  I just think that, with an untrued diameter of 19.65mm, a spec of 19.4mm does not leave much room for truing and a smaller diameter spec would have worked just as well, with everyone setting up to that spec.  As Marty stated, he took measurements after the race to check everyone’s diameter and used those results to decide what the new spec should be.  What was not reflected in those measurements was which cars had the original tires and which cars had the newer, lowered tires.  Also, there may well have been an issue with warm tires recording a larger diameter.  My car was listed at 19.46mm.  When I measured it this week, it was 19.34.  This was not an incorrect caliper measurement.  When the caliper was set at 19.4mm there was a clear gap to the tire.  I will check my caliper against the template tomorrow to see if there is caliper error.  I just think a smaller spec, that everyone would have set to, would have been better.  At this point, as everyone has bought new tires to comply, I do not think it would be fair to change the spec.  Everyone will just need to use extreme care when truing.

    I do not know why there is a spec for track.  To my memory, the only previous race where we had a track spec was when there was a particular slot car with a much wider body and the track was specified to address this.  In other races,the rule has always been that the tire/wheel must not project beyond the body when viewed from above and the rule has worked well.  With identical bodies this rule could have worked here.  Again, now that everyone  has (hopefully) adjusted their chassis to comply with the spec, I do not think the rule should be changed.

    I am opposed to the spec about tire diameter minimum after the race.  This is a spec we have never used and I think  it sets a bad precedent.  To say that the racer should account for tire wear after the race and set up their tires with that in mind is too much to ask.  There are too many variables.  What if it is a hot day and there is more tire wear?  I think if the car is legal before the race, with the proper tire, wheel, diameter, etc. it should not be checked after the race.

    As I said, I understand the need for rules and strict adherence to those rules, especially with a spec series where small variations can make a difference.  With the exception of the post-race spec, I am satisfied with the rules as is and am looking forward to racing.  I just think, in the future, a little more leeway in setting up those specs would  have been better.

    See everyone tomorrow!

    Russell

    #11663
    porsche917
    porsche917
    Moderator

    Russell,

    Good to hear you will be racing with us tomorrow.

    The point with the tires was to keep the outside diameter to a minimum diameter so the car is not riding lower to the track thus lowering the center of gravity and giving someone an unfair advantage.

    Tire wear is not as excessive as everyone seems to to think.  Let’s see what it looks like in a before and after measurement for all cars tomorrow and see how much actual wear everyone gets.  Like I said earlier, I ran for three hours on well trued rear tires and completed the first race and am still within the rules by a big margin.

    Lets look at tire wear tomorrow and I will see if the rules need to be modified any more than I already have.

    Let me explain why track is an important measurement.  On heavier cars like the RevoSlot’s a wider track can give the car more stability in the turns.  Wider track could result in better corning giving one car an unfair advantage.  That is why I am so concerned about it.

    Let’s see how everyone does tomorrow with the rules and see what if anything needs to be changed.

     

     

    #11664
    chapracer65
    chapracer65
    Participant

    Marty

    First of all, as I said previously, except for the post-race inspection (a rule we have never used and, I believe, a bad precedent moving forward), I do not think any of the rules need changing.  That horse has left the barn, and there is no point now.

    As for the tire diameter and track, you missed the point I was making about the tire diameter and track.  Of course, tire diameter is important; that is a given.  In addition to the center of gravity, it also has a big effect on downforce.  My point was why the specific tire diameter was selected.  Any spec would have worked.  Everyone would have worked to that spec and it would have been a fair and level playing (racing) field.  If a diameter of 19.25mm had been selected, those with the later, smaller tire would not have to buy and true new tires.  Those with the  original tire would have had to get new tires in any case.  With an untrued diameter of 19.65mm, a 19.40mm spec requires great care in truing the tires.

    Again, with the track, it is clearly understood that a wider track is better; everyone knows that.  My points about the track are twofold:

    First, it is a stock spec.  The car should have the original parts, slight production variances should be allowed.  Barring, of course, an issue like the tires where, perhaps, a different axle spacer was supplied.  With an otherwise stock car, like mine, that was slightly out of  spec, it is difficult to machine the spacer to a smaller width, while maintaining a smooth and square edge on the spacer.

    Second, the rule we have traditionally used is that the wheel/tire should not extend beyond the body when viewed from above.  That would have worked fine here, especially with identical bodies.  Also, again, going forward, are we going to change the track specs for future series?  If we have a track spec here, are we going to have a track spec for Group C?  NSR Rally?  For accurate measurement, we would need a template for each series, if that is the case.  Is that what we are going to do?  The only time that I think we need a track spec is if there are significant variances in body widths between car models.

    My issue now is whether how the way specs for this were created will be applied to future series.

    Still looking forward to the race today.

    Russell

    #11665
    chapracer65
    chapracer65
    Participant

    I agree with the point Randy made about post-race inspection.  I am not opposed to post-race inspection.  I am opposed to post-race disqualification.  A post-race inspection that would give a heads-up that the car would not pass inspection for the next race would be helpful.

    #11669

    ALEREAL3D
    Participant

    Good afternoon fellow racers

    I am about to get some pairs of tires rears and back for the revo slot thing

    I was wondering… because I checked that for ordering a pair or three the shipping is exactly the same will anybody be interested in some tires eventually and help paying the freaking 11 dollar ship rate?

    Please let me know

    thanks

    I am still in disbelief of what happened this past Saturday (now you can start your comments ) LOL

    #11691
    porsche917
    porsche917
    Moderator

    Alejandro,

    I will take four packs of 4.  I will also cover any expedited shipping so they arrive quicker if at all possible.  Please confirm with me.

    #11772
    Radial TA
    Radial TA
    Participant

    Alejandro, if you still have room order me a set of front tires.  Thanks, Randy

    #11789

    ALEREAL3D
    Participant

    I ordered 3 sets of rears and two sets of fronts

    Anyone needing just let me know Please

    Yesterday I totally dismantle the Revo to clean and inspect everything

    I clean the bearings again and they were really dirty, but this time I blow them with the airbrush and alcohol until I felt the outer race spinning with the force of the air

    I hope this will really clean them. I oiled all again and will assemble  later

    The Slotit  pinion is in very good condition ( that’s an improvement all must try to  do )

    So far this car is the one in which I have made the more laps ever on a race and I am really happy with the handling of it. As all of us, I am looking forward to the next race.

    Best regards

    Alejandro

     

    #11790
    Radial TA
    Radial TA
    Participant

    I bought POWER SHOT Electric Motor Cleaner Spray at Hobby Town Sunday and cleaned the RevoSlot Porsche today.  The axles, bearings, and spacers all had black deposits, most of which had gotten hot and compessed, but cleaned off OK.  The parts run much freer including the front end.

    #11838

    ALEREAL3D
    Participant

    Good morning to all

    If the tech plate doesn’t fit on your rear track of the Revo Slot car

    DO NOT REDUCE THE SIZE OF SPACERS

    until  being  totally sure that the bearings are completely seated on the

    red aluminum standoff

    I was surprise when assembly my car again and doesn’t pass tech on the 63 mm back track

    and when check everything the bearings wasn’t completely seated.

    Best regards

     

     

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BarkingSpyder

BarkingSpyder

Overhauled a Simca engine & tranny, 2 IH tractor motors & go-cart by 15. Aspired to be Ed Pink, Smokey Yunick, or Wernher von Braun-instead became a sound engineer and worked at NASA by 24. Current gig = software engineering & project management best-practices SME