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About stumpalump

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  1. I was fooling with ride height yesterday and was wondering what your take is on it. I’ve heard that you want 30% of your shock travel compressed at ride height but I see a lot of cars lower in the rear than in the front. How do you set yours and why?
  2. stumpalump

    Engine Swap Ecotec 2.2 to 2.4

    I have just a little bit more power with the 2.0 supercharged LSJ version. I like the stage 4 pressure plate with a 6 disk clutch. I can stay full throttle and downshift if needed and it slips and hooks up just right. Reallly nice if you want to shift on a long power slide or blast up a climb and bang down a gear while under full power. It just feels right because the heavy pressure plate is really fast and the disk slips just enough to be smooth under full throttle. Hopefully you have a great shifter like a pro am that you can really trust. You know its right when you can shift it without lifting up or down and the transition to full lock up comes on like a dirt bike or an automatic when you side step the clutch. The 4 puck will do the same thing but only under full throttle shifts without lifting. You have to let the cluch out slow unless you are under full power or it just grabs. Try the 6 disc and your stage two and if slips too much when you beat it then up the pressure plate not the clutch disk.
  3. stumpalump

    2" Hollows

    Combos should be welded over a hole so you can weld the inside and the outside. If done right then they don’t fall off. The plate that the spindle or hollow is welded too can break off the rest of the spindle. The whole spindle and not just the stub or hollow takes a beating on all cars. Here is combo that broke in right front of me Thursday that was made right and was beaten for 10 seasons with 10.50x15 STU 3 rib. 4 seat LS car that hauls ass with a fast driver. I’ve heard that if they get too hot during the weld they break like this or that there was a small run of combos and a lot of them broke in the same place along the step. In this case it was just run hard for a decade with a big azz tire on it. You can see it was cracked for a while. It got run over by the back tire and did not bounce up but trust me if you see a wheel come off crank the wheel and get away from that bouncy mofo before it hits you in the face.
  4. stumpalump

    Front tire size

    Fixed thanks
  5. stumpalump

    Front tire size

    They buff or shave off the outside treads to save weight and give it a pointy profile in the center to work in the sand. Speaking of weight....From what I’ve read here over and over Baja Pros are heavy. The Thing has 28 pound tires? Thats light as hell for a tire that size and beef. I want to borrow a set now....The 8.50 STU tripple razor weighs 23 pounds used so call it 24pounds. A spun aluminum non beadlock rim is 8 pounds for 31 pounds total. Post more tire weight please. 8.50 STU Razor is 24 pounds BAJA Pro 35” shaved is 28 pounds.
  6. stumpalump

    2005 tech 3 mid engine

    That shock has a steep angle and new mounts would be best. Swing by pad 2.5 on thursday or friday. One guy there converted to coil overs. He can tell you all he went thru trying to get air shocks working and what to expect if you swap to coilovers. Look for a group with white van and a white Dodge truck among the class A’s. Post up some more pics of your front end.
  7. stumpalump

    Flutter on rebound side?

    Very Cool! Thanks! The foam bump stops are on the way but I did not mention that. I do want the car to be stiff so I can huck it sideways at will. Turning breaks are for pussies imho. LOL. I’ll back off the rebound and throw one or two of my extra small shims on the compression side as you suggest. Thanks but what is the ifp plunge? I set the internal floating piston in the resivior to the middle when I rebuilt and filled them. Is that what you are talking about? I was never really clear on that pistion anyway because I read different things. Worst case is I’m bringing a vise and a buddy has the complete Fox shim kit that I can use.
  8. stumpalump


    Primer http://www.steel-it.com/polyurethane-stainless-steel-coatings-10 FWIW Rustoleum makes a similar paint product as well. https://www.rustoleum.com/product-catalog/industrial-brands/high-performance/urethane-coatings/steel-tech-aerosol
  9. stumpalump

    Flutter on rebound side?

    2.0 fox coilover front 10” 150/250springs. No bypass or limit straps. I blow thru the travel when running hard. G-outs or down hill onto the flats I have to slow down and bang 2nd gear. 3/4” preload just barely gives it enough sag so I do not want stiffer springs. I may run almost no preload and am OK with that. Compression valving is being changed from standard Fox #60 valving to, #75 so I can run a little harder. I thought this stiff stack might make the chop bad so I added a mild flutter between the large disks. .9” diameter .01 thick shim. My first rodeo with a shutter. The rebound is stock Fox #60 and is going to #75. With no straps it tops out. Not hard but I know when it does it so I thought I’d move the rebound the same amount as the compession to keep things even. The pic was with a 200 pound upper before I went to the 150. It sat way too high.
  10. stumpalump


    Recomended four coats plus the primer. http://www.steel-it.com/images/documents/steel-it-polyurethane-application-instructions-for-motorsports.pdf
  11. stumpalump

    Flutter on rebound side?

    I read to run a flutter on compression but not rebound. Why not? Also I read to go stiffer with the rest of the stack when you flutter? 15% stiffer sound right?
  12. stumpalump

    8" wide wheels with paddles

    Randy just had his 12” beadlock rims cut down to 10” by OMF. I did’t even know they could do that. Runs a comp cut 33 blaster and it looks and works bad azz on his very light car 1700lbs. His tires got a little taller in the center but also bulged out at the sides a bit. The tread cords really don’t grow much taller contrary to belief because the cords hold their shape. Radials dont grow at all on a narrow rim. My next rims to fix my off set problem will be non beadlock spun aluminum 12x15x3.5 back spacing. If anybody has a set laying around I’ll take them. I’ll put a 12x15 inner air beadlock in it and run 7-8 psi. Nothing soaks up the chop like low air pressure but they get too much side roll. Inner air, Staun or Coyote internal beadlocks suport the sidwall of the tire. They are magic on a jeep but a pita to install and maintain so they are not common. I can run 50 mph with 6 psi in the 35” tires with internal beadlocks and the jeep handles fine because the inner air beadlock is at 32 psi. I’m going to put them on the rail once I get rims. Anybody try internal beadlocks on a rail or have a set of rims that I need?
  13. stumpalump

    13.00 plus vs 13.00 what's the difference?

    Tell us what car, aproximate weight, motor and HP and most important what tranny. Do you like to drift and slide or do you like that conected planted feeling that lets you work your motor to the max? Since your asking and 75% of cars run way more paddle than they need I’d bet the 13 will do it or trim the hell out of the plus like I do on my 1764 pound car with 275 at the crank.
  14. stumpalump

    Front tire size

    2 guys in our group broke spindles and wound up rolling the cars trying to 3 wheel it out of the dunes. I think it’s important to adjust out the preload on the rear before trying to 3 wheel one. All this reminds me to install an intrusion bar in the windsheild opening. A bouncing tire, wheel, hub, spindle, break rotor and lug nuts are heavy enough to kill you if you are behind the car it breaks off of.
  15. stumpalump

    Howe power rack problem

    I thought all that stuff was rebuildable by yourself? https://www.mckenzies.com/products/howe-rack-pinion-seal-kits

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