Each mark on the knob represents 1/8 degree of camber (clockwise for positive camber, counterclockwise for negative). Many circle-track cars are set up to make lefthand turns with positive camber on the inside wheel and negative camber on the outside wheel. The torque specification for alignment bolts appears to be as much as humanly possible ft-lbs. All in all, the Tenhulzen 4-wheel alignment system requires quite a bit more finesse than your usual set of toe plates or bubble-level camber gauge. Page 1 of 3 1 2 3 Next > appletree. Surprisingly, Martin and I had a lot of trouble getting the numbers to show up consistently at first. Knowing your car's weight is handy, but knowing how that weight is balanced is critical for a race car and can be measured easily with the Longacre Accuset scale system, which costs about $1,100. A wheel alignment can seem like black magic. Refer to the previous section about scaling and cross-weighting to learn how to level all your wheel pads before you begin your alignment. Wheel alignment is a basic Jeep or 4×4 truck maintenance need. Rob Siegel. Up to a half-degree more positive caster on the passenger side is often used on production vehicles to compensate for the effect of crowned pavement and keeps the vehicle from pulling to the outside edge of the road. A turntable is a "sandwich" made of two plates with a layer of grease between them. While the most popular and common method by Ray Scruggs use strings, I decided to go stringless. This is definitely true if you intend to drive at Pocono Raceway. The next step was front wheel alignment. That’s a valid assumption, as DIY car alignment is considered an oxymoron. Car was running straight, nice print out of specs, no problems. If the front ruler shows a larger measurement than the rear, the wheel has toe-in. If the two arms of the camber gauge aren't perpendicular to each other, the fingers can't grasp the wheel properly and the gauge reads incorrectly. Then we pulled the strings out and hooked them onto the frame so they sat slightly higher than the centers of the wheels. Although primarily known as late-model Mustang suspension specialists, Maximum Motorsports also sells several inexpensive alignment tools, including the caster/camber and bumpsteer gauges we used. It turns out the reason for this is that the slits that make the gauge adjustable are cut slightly too wide, which lets the short arm shift so that it isn't quite perpendicular to the long arm. If the corner-weights vary, there is still some bind in the suspension. But if you enjoy the satisfaction of knowing how to do it yourself, or if you expect to be making enough alignment changes that taking your car to a shop every time would be expensive and impractical, you'll benefit from adding alignment skills to your mental toolbox. Turn the digital gauge on and hold the zero button down until it reads 0.00. Hands-On - Tenhulzen 4-Wheel Alignment System Testing a clever DIY 4-wheel alignment system Posted by Roger on March 26, 2016 Now that we are done assembling and fiddling with the Tenhulzen 4-Wheel Alignment System, it's time to put it to good use. As surprising as it is, the thickness tolerance on a 2×4 is very good, this specific plank measured to within 0.003 inches. Notice that the left, rear, and total weights did not change. Cross-Caster: A side-to-side difference in caster settings. If the rear ruler shows a larger measurement than the front, the wheel has toe-out. Low-cost tricks for a DIY alignment. I purchased one of those life time alignments from Firestone back in 2007. Then came the most tedious part - squaring the strings. Making a 1/2-inch ride height adjustment to the left rear resulted in a 1.1 percent increase in cross-weight to 49.2 percent, which represents 0.8 percent of reverse wedge. The intricate details that were put into both the frame and the handheld camber/caster/toe gauge take away many of the annoyances of doing alignments. Your First AlignmentWith some patience, it's actually very easy and cheap to set your wheel alignment at home. A+ seller and unit. With the Tenhulzen system (as with most string-based alignment systems), this is achieved by moving the front and rear frames so that the distance between the center of the hub and the string is the same across the left and right sides of the car. If you see that the tread on any one tire appears lower on one side of the car, or lower on one side of a tire than the other side, you have an alignment issue . Even if you just want to set it and forget it. All you do is attach the gauge to the wheel and turn the steering wheel until the angled cut is parallel to the bodywork of the car. Caster: The deviation in degrees between an imaginary line running through the upper and lower ball joints and a vertical line running though the center of the wheel hub to the center of the tire's contact patch on the ground. How-to: Jeep 4×4 Front Wheel Alignment. Our testbed is a '90 Honda CRX Si prepared for endurance racing by the team at ProjectCRX.com. This will also help identify bent chassis parts in the future. Alignment shops have very specialized and expensive tools to get the job done correctly. Share. Martin also found that he could bend the gauge with relative ease and force the fingers into the tyre to throw the readings off even further. A single "sandwich" goes under one tire. (Small differences are the result of rounding.). I tried doing the wheel alignment myself. - I am making a long trip, so I cannot wait and decided to do the REAR Alignment myself. While doing that I completely removed the subframe and replaced all the stuff in the front suspension. Verify your procedure by weighing the car, jacking up one corner, and rechecking the corner-weights after settling. A tire's traction is always greatest when the largest part of its contact patch is in contact with the road surface, and static camber can be dialed in to keep the tire perpendicular as the chassis rolls in a turn. Overall, I would recommend this system to anyone who has previously owned or used a toe gauge and/or camber/caster gauge. We just couldn't get the fingers to grasp the wheel consistently. In order to get an accurate toe measurement on the car, the strings need to be perfectly parallel to the true centerline of the car. DIY Wheel Alignment It’s Easier Than You Think! Adjust sway bar end links for the new distances to mounting points and reconnect. As for me, I plan to make this system a staple in the garage for use with both our race cars and street cars. Although a bit more advanced and requiring more expensive tools than a basic alignment, we've also included information on measuring and adjusting bumpsteer and scaling and corner-weighting a car-techniques that are critical to properly setting up any race car or high-performance street machine for optimum handling. Multiply whatever it says on the gauge by 2 to get the caster angle. Factors affecting wheel alignment In theory, all four wheels should be perpendicular to the ground and parallel to each other. DIY car Wheel alignment. Reconnect Sway Bars. Thread starter chard; Start date Apr 28, 2009; C. chard Well-known member. Find 2 places on your wheel that are 180 degrees apart and have the same run out measurement. Many oval-track racers run even higher amounts of cross-caster on the outside wheel to help the car turn down to a lefthand corner. Camber adjustment is very straightforward with the Tenhulzen gauge. Then turn the wheel until the angled cut on the other side is parallel with the side of the car. Now that we are done assembling and fiddling with the Tenhulzen 4-Wheel Alignment System, it's time to put it to good use. Most gearheads understand the basic definitions of caster, camber, and toe, but when it comes to actually measuring or setting these wheel-alignment specs, the easy solution is to bring the car to a professional shop. Then stick the gauge on the wheel and read the number that shows up. If Tenhulzen were to re-engineer this kit using thick aluminum or steel plate like my Longacre alignment tools, I would probably revise this recommendation to include absolute beginners. If the top of the tire tilts inward as seen from the front, camber is negative; if it tilts outward, camber is positive. Tilting it side to side can affect the camber readings. Practice makes perfect, as they say. A really good DIY check can be found here: DIY QUAD ALIGNMENT There are also quite a few on YouTube. Refine your settling procedure until your results are repeatable before making any changes. Cross-Camber: A side-to-side difference in camber settings. See Also. But once we got it, measuring the toe was a very straightforward process. Ackerman is desirable because it helps the front end turn in to the corner. Although this probably has to do something with the fact that Martin weighs 200 lbs and is mostly made of muscle, there is something to be said about the relative flimsiness of the gauge compared to some of the other camber gauges I've used in the past. * Center the steering wheel before measuring and setting the toe, and make all adjustments without moving it. Yes and no. on March 26, 2016. Do-it-yourself wheel alignment guide. Most critical is having a flat, level spot to work from, and as you'll read, we've come up with a simple way to accomplish that so you can set alignment in your garage, shop, or even at the racetrack. Last year I overhauled an 5hp19fla automatic transmission and replaced. Up to you. Aligning a car may seem like one of those voodoo sciences that makes no sense if you've never actually seen it done, but as we learned by doing in preparing this article, the process is really quite straightforward if approached logically. * Some toe-out on the inside tire in rebound can help corner entry by creating an Ackerman-like effect as the car turns in. Now you need to set up 1 jack stand at the back of your car, on the side behind the rear wheel and the other jack stand in front of the front wheel and off to the side. Tips on Setting Alignment* The effects of the various alignment settings interact, so adjust caster and camber first. However, if you’re repairing steering and suspension parts, you may throw off your wheel alignment. Scaling Tips* Always measure cross-weights with the car in race-ready condition with all fluids full and driver weight accounted for. Only physically moving or adding weight can change the distribution within the car. Due to the nature of how suspension systems work in production cars, there is a standard order of operations for aligning race cars: The ride height and corner weights had already been set, so we skipped right to the caster and camber. Toe must be set last. Adjust jack to position a-arms to current ride height, Center the steering rack and start measuring to either toe in or out. 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