2016 race rules

[countrybumpkin]

I also wanted to ask. I am thinking of building a Racer this winter and was wanting to know what size engine I could use ? Also make best fitted for these ? Is a snowmobile engine a good choice ?
I ran a 440 Herth in my tiger back in the day . what about a 400 liquid cool engine ??
Any input would be helpful !
Also gearing and so on.
Thanks
Tj

It would help if we knew what brand atv you are racing and which class you want to race in. A 400 cc liquid would work but would most likely put you in the modified class with 500cc machines.

[Joe M]

Glad I decided to visit the site. Looks like they're gitting serious about the racing saftey. I'll be making some changes to my machine.

[wedge]

I also wanted to ask. I am thinking of building a Racer this winter and was wanting to know what size engine I could use ? Also make best fitted for these ? Is a snowmobile engine a good choice ?
I ran a 440 Herth in my tiger back in the day . what about a 400 liquid cool engine ??
Any input would be helpful !
Also gearing and so on.
Thanks
Tj

[wedge]

We build dirt and drag cars here at ReWheel. I use .095 on my cages unless its NHRA. then it has to be .120. I would thing the .095 is good for these machines as there not as heavy as a full size car. As long as it is built Rite !! Also remember the frame is Not as thick as the roll bar so the thicker tubing really isn't the weakest link here !
Mounting should be a key point to look into !!
Just my input on this as we turn out 10 to 20 cars a year and yet have a cage failure after 29 years !!

[racerone3]

Shoulder belt mounting is also critical. Ideally they should be mounted at the same height as the drivers shoulders. This is tough in an attv where the frame is the only rigid point. Shoulder belts mounted higher allow the driver to raise out of the seat in a frontal impact, and belts mounted lower than shoulder height can cause spinal compression in a crash.

I won't argue at all on the 120 wall thickness, and as I said it is just food for thought.

[LittleG]

I think more detailed the rules the less decisions the racer has to make. Especially with safety. I think if you went with the main hoop of 1 1/2" and .120 wall you should be pretty safe. My Attex crash roll cage is 1 1/2"x .120 annealed steel and only moved a few degrees when I flipped it. The hard corners made the roll over very jarring.an rung my bell pretty good. The traditional long radius hoops on the Attexes always worked well and should probably be recommended.
Also minimum seat back height for shoulder belts and neck braces (go Kart type doughnuts) should also be considered.

Dave Thanks for working on this. looks real good

Those are great suggestions Jersey we can recommend that but it is up to the driver I mean we will be looking at all cage designs and seats, seat belts cause I never want to see that happen to anyone again.

[Matt O.]

Good work Dave! Thank You for your time and effort.

[jerseybigfoot]

I think more detailed the rules the less decisions the racer has to make. Especially with safety. I think if you went with the main hoop of 1 1/2" and .120 wall you should be pretty safe. My Attex crash roll cage is 1 1/2"x .120 annealed steel and only moved a few degrees when I flipped it. The hard corners made the roll over very jarring.an rung my bell pretty good. The traditional long radius hoops on the Attexes always worked well and should probably be recommended.
Also minimum seat back height for shoulder belts and neck braces (go Kart type doughnuts) should also be considered.

Dave Thanks for working on this. looks real good

[LittleG]

Food for thought Dave. A lot of aatv cages are made from pipe which is much weaker than tubing. In that case .120 wall is probably a safe #. NASCAR and NHRA only require .090 TUBING. A cage made of tube is lighter and safer IE: less susaptable to rollovers due to a lower CG without sacrificing strength. I might also be able to come up with a sonic tester you could use to measure wall thickness instead of the sledge.

Thanks Brian that was the rule from the old book I know Buddy did Dusels R.I.M. cage out of thinner chromoly but that cage as well built as it is twisted during that wreck with mikes son I think it will depend on the material used this is on my list of things to discuss next weekend and then it will be refined. I already gave the thickness a thought from our old stock car days but it has to be tubing and not muffler pipe the other cage I forgot about is that brush guard that argo sells them things crush faster then a beer can in a roll over.

[amphibious drew]

I hear hydromike does free roll cage testing. We could always make that a part of tech.

[racerone3]

Food for thought Dave. A lot of aatv cages are made from pipe which is much weaker than tubing. In that case .120 wall is probably a safe #. NASCAR and NHRA only require .090 TUBING. A cage made of tube is lighter and safer IE: less susaptable to rollovers due to a lower CG without sacrificing strength. I might also be able to come up with a sonic tester you could use to measure wall thickness instead of the sledge.

[LittleG]

Oh. I will

[Don]

My 1 1/2" x .120" wall thickness tubes just got here today. Please be kind, Dave.

[LittleG]

Thanks Jersey I was getting to that . I had to do this twice last night and forgot some things I wasn't happy

[jerseybigfoot]

Good work
Add a ,minimum diameter and wall thickness and material for the cages an roll bars.