Sandrail Tech
This forum is for strictly sand rail technical questions and advice.
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246 topics in this forum
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https://weddleindustries.com/gear-calculator https://weddleindustries.com/sites/weddleindustries.com/files/downloads/Current Gear Availability 4-1-21.pdf There are a few ways to sort out what gear ratio will work for your specific application. Most trans builders tend to work with a "common" set of ratio's that they know most people are happy with when using common engines and power numbers, but you the individual can make some determinations on what might work for you car the way that you drive it and where it is mostly used. Most typical sand cars will never see more than 100 MPH. If you want the most performance from your engine, you can start by figurin…
Last reply by richard h, -
- 1 reply
- 146 views
If anyone would like this copy of the magazine hit me up. Perhaps your car is main topic. Text me 626 327 6816. I will hold them for a week.
Last reply by Poule43, -
- 20 replies
- 583 views
So in a nutshell, I built up a Honda j35 block and put it in my car. I test started the engine and everything seemed fine, so i decided to take it to the dyno to have it tuned. On the first pass the car lost oil pressure and can't seem to get the pressure above about 15psi even while running the rpms up. Mine, and the guys at the shop, first thought was a bearing had spun. I pulled the oil pan off and check all the rod bearings and the main bearings, all of which look perfect. Other than that what other possibilities am I looking at for loss of oil pressure? I installed a new oil pump when I built up the block. So that is a possibility, but I would like to bel…
Last reply by Rockwood, -
- 58 replies
- 1.4k views
What are the differences between the sand car, dual sport and the prerunner? I am looking at one with 1 5/8 tubing, 2” hollow spindles is it considered a dual sport?
Last reply by Turbodon, -
- 1 follower
- 13 replies
- 183 views
I was going into my old pictures, so wanted to add all the pics of The Desert-Dynamics pictures,
Last reply by Turbodon, -
- 1 follower
- 22 replies
- 523 views
So I kinda stole @Turbo_Manx_Maniactopic on Subaru belt slip. (I thought/wish that’s all I was doing as well-fixing slipped belt!) Stoked he’s back up and going! So no where near the end. But here’s everything to date. subaru 2.0 turbo 8-9lbs (creeps to 10 before settling) link ecu lemv5 bought used buggy 5years ago. Built 2008 Two issues -single fan, ran hot(low cfm-820ish) -starting issue. Cold or hot did not matter . If it did not start on first revolution I would most likely have to give it a shot of starting fluid. Start right up. Checked spark, injector pulse, injectors tested, new spark plugs, clean file filters, fuel pum…
Last reply by Jammer75, -
- 2 replies
- 109 views
used to have several great threads with spring rates, so whats everyone got on their car? also include the car specs and weight 🙂 heres what mine was.. desert dynamics dual sport, setup midengine 3245lbs FRONT kings 2.0 coil carriers 2.5 triple bypasses 14-350/12-250 REAR king 2.5 ext reservoirs 16-500/16-500 3.0 triple bypasses.
Last reply by Dzrtrat1111, -
- 1 follower
- 5 replies
- 213 views
I am working on an old-school street-legal buggy. It is on a shortened pan. The front brake hoses are shot and the Master Cylinder is shot also. It has drums all the way around. I am going to change the rear Wheel Cylinders to 7/8" (stock is 3/4"). I want to increase the braking power on my large rear tires. I want to avoid using a proportioning valve...never used one. It had cutting brakes and I think they are coming off (not sure that I want them on the road). Here are the Qs: Should I change the size of the front WCs to 3/4" (the fronts are 7/8" stock, rear 3/4 stock). I am thinking that might be an improvement. I see that the Master Cylinde…
Last reply by Stinky, -
- 2 followers
- 11 replies
- 175 views
I have Rugged radios and car-to-car in my Rail and SxS. Both cars have the typical headsets. I don't currently wear a helmet in the Rail but am now thinking I should start doing so. If nothing else to set example for my kids. And I've always been confused why the SxS came with headsets when you have to wear helmets? Anyway, what is the best way to be able to wear helmets and use the radios? Is it best to buy helmets that have speakers and mic in them or is it easy to retrofit helmets with the needed equipment? Where does one buy the equipment? I'm in Oregon so I can't just go to vendor row in G and visit the booths to get what I need. Might also be nice to have speakers w…
Last reply by Nic, -
- 1 follower
- 10 replies
- 225 views
I have a 9" stage 2 clutch, 6 puck I bought from Outfront in my Manx, it had a CNC 5/8 Master and the normal CNC pulling slave. I've had the clutch fail (hydraulics) several times with no pedal, so I decided to replace it all after rebuilding the master & slave several times. As CNC doesn't exist anymore, and I want new rather than rebuilding yet again, I decided to try the Jamar 5/8" master and slave. As I hoped, it all installed very easy. All the bolt holes and dimensions matched up to the CNC. The issue is that even though I matched the master size, the pedal is much harder that it was with the CNC. It feels more precise, meaning there is not much slop in fee…
Last reply by Turbo_Manx_Maniac, -
- 2 followers
- 79 replies
- 3.9k views
Well, things are going in the right direction... I’m putting things back on the car. This is about as stripped as it got: I got the transmission and new CV’s back from the builder a few weeks ago and installed the trans and new CVs and bought new axels because there was some question as to if they had been turned around... and for good measure, I stopped at Kartek for some washers and stub axel bearings and they sold me a new set of one piece chromoly stub axles. One piece stub axles Great big fan for my 14” X 14” setrab oil cooler We did the math and used a calculator …
Last reply by Bobalos, -
- 1 follower
- 7 replies
- 201 views
Kartek is months out of solid core and gun drilled 930 300m axles, especially for length I need. Anybody have any 25-1/4 long 28 spline or know a reputable place with them in stock?
Last reply by Spark2678, -
- 11 replies
- 445 views
LS 425 with a Whipple 4.0. I use to have 9-10lbs. End of last year noticed power down and boost was almost none existent. I found a tear in a rubber boot where the boost line from the gauge tee's into supercharger and fuel regulator. I replaced the boot and checked the lines as best I could. I only see around 5 lbs now. Anyone have any Ideas on what's going on? Much appreciated.
Last reply by SANDFORME, -
- 1 follower
- 27 replies
- 691 views
So I completely rebuilt my new to me dunebuggy.com car last summer. And I had my engine gone through by a shop here in phoenix but it is a rebuilt LS7 with stock bottom end with heads cam and intake. I know this engine isn't the best to boost just wondering what my options are. depending on my options might just put it on a bottle 🤪
Last reply by J Alper, -
- 1 follower
- 8 replies
- 197 views
I just got an old-school sand/street car w/a swingaxle trans. Would there be any advantage to replacing the VW style lugnuts with studs? Every other car, and trailer that I've had, has had studs.
Last reply by azyxzer, -
- 2 replies
- 154 views
I’m upgrading to 934cv’s . 450hp 33 blasters 35 in dirt tires . 2675 lbs car . What are most of you running for axle dia spline ? I’m debating if I need the 35 spline over 33 spline 300m . Never had a issue with 930 28 spline axles . mid I ever add power I do not see going over 550ish at crank. Thanks
Last reply by Fullthrottleguy, -
- 2 followers
- 78 replies
- 2k views
Went to Borrego last weekend, car was running fine. On Sat I let my brother drive the car, we ended up at Rams Hill for a beer. When we went to leave, the car wouldn't start. It would turn over about a revolution and a half and sort of lock up, like it had hydraulically locked. It just kept doing this with no signs of firing up. I tried to bump start it and it started popping like from what seemed like 1 cylinder. I suspected the timing was way off. Skip to tonight, I removed the belt covers and discovered the crank timing mark was about 3 teeth counter clockwise from the mark with all 4 cams perfectly aligned. The cams did not slip, just the crank. I pulled th…
Last reply by FIREMAN, -
- 37 replies
- 577 views
On my twin turbo motor, the outerwears on the K&N filters get saturated in oil at the base of the filter. I am not sure what is causing this, and thought I'd see what you guys think? The filters are newer.... but have been cleaned and re-oiled about 4-5 times now. I know they come heavily oiled from the factory. when I re-oil them I let them sit for a day or so, and then blot it with clean paper towel to pick up an excess oil. I am not noticing any extra oil on the inside of the filter. My theory was somehow air / pressure being blown back out the turbos, causing some filter oil to blast onto the outerwears? is that even possible? It does have a BOV, and the…
Last reply by Justgetnby, -
- 10 replies
- 460 views
My car felt down on power this weekend and could smell fuel in the exhaust. LS3 376/525 with Mefi 4b and CMB harness. Took a temp gun to the primary tubes and the left bank (cyl 2,4,6,8) were only in the 200 ish deg range while right bank were 700 ish deg. Pulled the plugs and found that the left bank plugs looks fouled and right looked normal. I replaced the bad plugs and checked the coils and injector harness connections with no change in the way it was running. A little background, I just finished a full tear down to paint the chassis because it was still raw chromoly and was tired of fighting to keep the rust to a minimum. I painted everything with …
Last reply by Dzrtrat1111, -
- 6 followers
- 249 replies
- 10.1k views
I think it would be nice to have a thread dedicated to all the members running Honda engines. One place to discuss all things Honda. I will kick it off with my current build. Brand new short block and brand new heads. Installed the heads yesterday and now am working on the timing components but having an issue with the timing belt cogs matching up to the drivers side cam gear. any tips on how to align them? They are all at TDC.
Last reply by n2orockss, -
- 1 follower
- 10 replies
- 287 views
I have a 5.3LS built by Alper in my Funco and lately I have to turn the ignition on few times to get the pump to prime properly or it just cranks. Doesn’t happen all the time but sometimes. Anyway I think it’s the pump, not filters. Regulator is fine, it’s new and when running it’s pegged at 60lbs at idle. My fuel pump is a Walbro 255LPH high pressure pump. If I go spend some money and go aeromotive will the a750 be fine? I see some say a1000 but it seems to much.
Last reply by Goatpoker, -
- 1 follower
- 13 replies
- 323 views
I forget who shaves tires in San Diego specifically North County if possible? I have 2 33inch Baja pros that need it done.
Last reply by Readster, -
- 1 follower
- 24 replies
- 593 views
I have a S4S with a Kennedy dual disc clutch. Recently I have been having issues with clutch arm on tranny returning all the way. I can push the clutch pedal in 3 or 4 times than nothing. Go back to Trans and there is a ton of slack on my slave and the clutch arm is half depressed. I can push arm back with my hand but I hear a clunk inside. Anyone else ever have this issue? I take it I’m pulling motor to see if I damaged throughout or pressure plate?
Last reply by Badbar88, -
- 8 replies
- 243 views
My trans has an intermittent leak. If its been sitting a few weeks and I go to fire the car up it will piss trans fluid a good amount. Maybe a cup full, Then after it does that it does not leak. Outfront said many 091 leak unless recently built but this car is old so it will leak and I am fine just topping off. My dilemma is that the previous owner "thinks he was using" Valvoline 90w but not 100%sure since it sat a few years then got it running and duning. Spoke to guys at Car Craft and they said it should be synthetic and thats all they put in their VW trannys. But also said since previous owner used Valvoline then continue to use it. WHAT IF it was not v…
Last reply by Sean@Weddle, -
- 3 replies
- 84 views
When checking/filling oil level in my 002, should it be level with the bottom of the inspection hole? or a certain level below that? Recommended oil weight? I can't remember what Rich told me after rebuilding it a couple years ago
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Last reply by 2turbofords,
