DIY hitch for a street driven track car.
3 Attachment(s)
It came up on another thread but I felt it deserved its own thread.
This is what I made see pictures. Attaches to spec Miata tow eyes. 1) The whole hitch and all the mass associated with it can be installed or removed by 2 bolts in seconds using a crescent wrench. 2) I think it will work with my planned DIY underbody treatment and rear diffuser as well. Bob |
A note to others since I see you already have it- Run Grade 5 bolts on your setup. The hitch WILL flex, and grade 8 bolts shatter, while grade 5 will flex with it.
Your setup looks great! |
Interested in making me one? :D
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Originally Posted by chpmnsws6
(Post 592904)
A note to others since I see you already have it- Run Grade 5 bolts on your setup. The hitch WILL flex, and grade 8 bolts shatter, while grade 5 will flex with it.
Your setup looks great! I got the hitch receiver and tubing from a welding shop that makes things like trailers and hitches. Bob |
1 Attachment(s)
Resurection per a recent tire trailer thread.
Bob - To be clear, in the attached picture, part "B" slides up in to part "A"? I assume you leave "A" bolted to the tow eye all the time and remove the rest by unbolting the large bolts that pass through the lower hole in the tow eye? |
Originally Posted by Scrappy Jack
(Post 676231)
Resurection per a recent tire trailer thread.
Bob - To be clear, in the attached picture, part "B" slides up in to part "A"? I assume you leave "A" bolted to the tow eye all the time and remove the rest by unbolting the large bolts that pass through the lower hole in the tow eye? The hitch slides up into the two small recievers easily and dosnt slide down while your putting the bolts in. Bob |
Originally Posted by bbundy
(Post 676233)
Correct. The little reciever parts that remains bolted to the car don't weigh very much though.
The hitch slides up into the two small recievers easily and dosnt slide down while your putting the bolts in. Bob |
Originally Posted by Scrappy Jack
(Post 676256)
The more I look at hitches, the more I realize that is pretty damn clever. Maybe Rennenmetal would be willing to build something comparable to be sold with the tow eyes.
Bob |
Yeah I need to find someone to build me one for sure.
Happen to have some measurements from when you built it bbundy? |
Originally Posted by flier129
(Post 676281)
Yeah I need to find someone to build me one for sure.
Happen to have some measurements from when you built it bbundy? I also have a bike rack design worked out that uses the outboard attachment at the tow hooks. It holds two bikes with fork mounts so no bikes swinging around by the top tube beating against the body of the car nothing touching painted surfaces of the car and you can open the trunk without pulling the bikes off. It is light weight as well. Bob |
Originally Posted by bbundy
(Post 676259)
Sombody should make it for sale that is for sure.
Bob |
I'm going to make one of these for myself! Thanks Bob. :idea:
I wonder about liability if it went into production though. How strong it really is mounted to tow hooks. You know some yahoo would load up way to much weight, use aluminum tow hooks and have things go bad. Said yahoo will just happen to be an attorney. :eek: |
Originally Posted by cueball1
(Post 676503)
I'm going to make one of these for myself! Thanks Bob. :idea:
I wonder about liability if it went into production though. How strong it really is mounted to tow hooks. You know some yahoo would load up way to much weight, use aluminum tow hooks and have things go bad. Said yahoo will just happen to be an attorney. :eek: I have a neighboring welding shop that would make them if I gave the guy the measurements. |
Originally Posted by Vashthestampede
(Post 676508)
Whoever decided to take on producing these would have to test it to the max to insure safety. You'll stand out enough towing with the miata, last thing you need is to have the fucker snap off and smash the guy behind you.
I have a neighboring welding shop that would make them if I gave the guy the measurements. Bob |
bbundy, what you have done there is beyond clever. Very well done. Yes someone should produce this. Flyin Miata decided there is enough of a market that they paid someone to do FEA on a lightweight hitch they now offer. Hard Dog has been selling them successfully. If yours removed 90% or more of the weight and is good for the lightweight track tire hauls we all need, I think it's a no brainer.
Well done. |
Details on the trailer you will use?
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My problem with producing this is you're shooting for a market somewhere between the DIY option of roughly $50, and FM's cost of $225. Not much room there.
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Originally Posted by jbrown7815
(Post 814664)
Details on the trailer you will use?
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Originally Posted by curly
(Post 814695)
My problem with producing this is you're shooting for a market somewhere between the DIY option of roughly $50, and FM's cost of $225. Not much room there.
It's just they have all followed the same design concept in doing so in permanently attaching a big chunk of mass to the car. With this concept the design doesn't have to be light and wimpy to reduce weight because all the mass comes off in seconds, it’s not permanently attached to the car. It works slick. I have been using it for a number of years now. Bob |
Originally Posted by curly
(Post 814695)
the DIY option of roughly $50
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