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About Scottfunk

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    Project Chummy

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  • Location
    Boise Idaho

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  1. Scottfunk


  2. Same size tires, 4.10 axle, but apparently Allison transmission is quite the different beast than the 48. I love the combination myself. My wife runs a thrift business on the side and she's always buying stuff from auctions. There's an auction house here that has tires often. I literally paid $13 for the set and mounted them at home by hand. If I knew what size I could ask her to keep an eye out.
  3. Guess I'll run the Chummy across the nearest cat scales this weekend. Frankly I have no idea whatsoever what she weighs. Front, back, or total. Thanks for that info. When my wife bought these tires for me they were used, and had a wear ring right down the center from being overinflated so I erred on the side of underinflation to avoid making it worse.
  4. Since were talking tires...I'm trying to figure out what the ideal pressure is but everything I read says check the door jamb. Problem with that is my Chummy is much more like your guys' trucks than what it was originally designed as. The tires themselves say 80psi max and right now I'm running 38. My contact patch is almost a whole square foot. I feel like a few more pounds would be easier on the fuel but if the trade off is premature wear then it's probably not worth it. What psi are you guys running?
  5. Scottfunk

    Quadzilla V2 Custom Tunes

    What I'm looking for is the rest of the settings so I can start with a tune that works well and see if I can squeeze a little more economy out of it. All of this stuff: Power Levels: Timing Fuel Load Timing: Low PSI Timing Reduct: Timing Reduct Scaling: Light Throttle Timing Adv: Light Throttle Timing Load Limit: Timing vs rpm 1500: 2000: 2500: 3000: Timing Max: Wiretap Pump Stretch: TPS Pump max: TPS Pump Min Minimum Pump Tap Fueling Percentage: Pump Low Boost Scale PSI: Boost Scaling: RPM Limit: Power Reduction: 0 PSI %: 1 PSI %: 2 PSI %: 3 PSI %: 4 PSI %: 5 PSI %: 6 PSI %: 7 PSI %: 8 PSI %: 9 PSI %: 10 PSI %: 11 PSI %: 12 PSI %: 13 PSI %: 14 PSI %: 15 PSI %: 16 PSI %: 18 PSI %: 20 PSI %: 22 PSI %: 24 PSI %: 26 PSI %: 28 PSI %: 30 PSI %: But for the default tune. Like if you click on custom tuning and you have your own tube loaded you can see all the settings, but if you look at default it doesn't have an edit button. Perfect. I missed that somehow. Thanks
  6. Scottfunk

    Quadzilla V2 Custom Tunes

    Does anyone know the settings for the default tune in v2 tuning? My truck runs amazing on level 5 with default tune and I'd like to use it as a baseline and monkey around with things from there but it doesn't give you that option.
  7. Scottfunk

    Quadzilla V2 Custom Tunes

    I did some digging and according to nada your dodge ram trucks are around 6000lbs. By my calculations my Chummy is close to 8000lbs. Is that enough to make a significant difference?
  8. Scottfunk

    Quadzilla V2 Custom Tunes

    That's why I went with the 4.10 gearing. I actually have higher cruising RPM's now. I wouldn't have thought 2cm wider would add that much weight but who knows. Sounds like I need to play around with the timing and see what I can come up with. If I ever have to start paying for my own gas I may have to find something smaller to drive. That'll break my heart!
  9. Scottfunk

    Quadzilla V2 Custom Tunes

    Well I recently changed from 265/70/17 tires to 285/70/17 and my fuel mileage sucks now. I swapped gears from the stock 3.54 to some 4.10's and my cruising RPM's are actually higher than before. At 74 mph I'm right at 1960 RPM's, 24% load, and 9psi boost. I do like my level 5 and use that for my dd tune but I'm not using the custom tuning yet...I guess I'm fixing to learn how. My question is two parts: @Me78569 the custom flash you built for my truck to read the trans range off of the data bus, which vehicle do I select in the "select vehicle" menu? The engine is a 2002 non HO. I've read a couple times where you told guys their mileage could be adversely affected by having the wrong vehicle selected. And secondly, is it possible to build a tune that has plenty of power under acceleration but is easier on the wallet under steady rpm and tps? Fortunately I don't currently pay for my own fuel but I just don't believe in wasting. I would be surprised if I'm doing better than 12 mpg right now and it's 80-90% highway miles. Can someone suggest a base tune for me that won't be disappointing between stoplights or between fuel ups? Engine is mechanically stock, externals include FASS150, 5 inch exhaust no muffler or cat, quad of course.
  10. Denny's driveshaft sells the Dana 60, 30 spline 11.4" stub shaft for $85. I'm building a work truck not a crawler so I think 30 splines it's just fine. I'll be using a pair of those with the ttb 50 spindles, hubs, rotors, and lockouts. Total investment $270 without seals and bearings. Probably happen week after next. Let you know how it goes.
  11. Just realized I never posted a picture of the 285/70/17's I put on the Chummy. My wife picked them up at an auction for $13 so they're not exactly brand new but good enough to get an idea of how they look without paying for new ones. And good enough to help me decide to regear to 4.10.
  12. Ahhh that makes sense. Since my quad gets gear indicator directly from the tcm then the gear ratio does nothing at all. I'll have my tcm tuner adjust for tire size and gear ratio and then I can fine tune with the tire size in the app.
  13. Over the coming weeks I'll be collecting parts to do a junkyard free spin conversion. TTB 50 spindles redrilled to match the Dodge unit bearing bolt pattern, 79-87 f250 hubs and rotors, and Ford d60 stub shafts. The last part may prove to be the most difficult piece but I'll be keeping an eye out at the junkyard and watching eBay. Keep an eye out for pictures or see Facebook.com/idahodieselconversions.com for the write-up. Currently featuring disc brake conversion for Dana 70 rear.
  14. I don't have an abs computer, my Allison tcm hands the speed straight over to the quadzilla. Guess I'll have my tcm adjusted.
  15. Ok so I got the gears swapped out and it feels really great. The turbo lag is all but gone, acceleration is insane, and the load seems to have come down some. Only problem is I can't get the iquad speedometer calibrated. According to the calculator at grimmjeeper.com my road speed at 2000rpm with the old setup was 85 mph and the new setup should yield 77 mph. The problem is when I change the gear ratio in the iquad from 3.55 to 4.10 the speed actually reads FASTER. Has anyone ever had to do gear ratio adjustments? What's the deal?