ridered3
Low Talent Wheelin
Understandable there for sure, especially to avoid any potential warping issues.
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Last Call Guest on these Group Buy Deal Items from Baja Designs
Build Broken4 Racing 4500 Class Build
- Thread starter broken4_racing
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With the weather jumping up above freezing, I took some time off the chassis this weekend to work on the axles. I wanted to do all the grinding and rust cleaning outside the shop. While I would love to have 9" axles put in here, I just can't swing it in the budget. I am trying to focus my money on the items that are harder to change later such as PDM, Digital dash, etc. Its been a few years since stripping my last 05+ housing and I definitely forgot how much work it is.
I will be building my own trusses and all the brackets with the plasma table I have borrowed. On my last axle trusses I used 3/8" top plate with 1/4" side plates. In the past I have always gone for beef vs weight savings and I am trying really hard on this car to work on that. With that in mind, Ill be using 1/4
"x4" top plates and 1/8" side plates with the exception of the front face of the front axle which will get 3/16 due to the ram. I think this should be enough since most of the 9" trusses I looked at from the race manufacturers (bomber, miller, etc) and they seem to use all 1/8". Do you guys think that'll be enough?
I will be building my own trusses and all the brackets with the plasma table I have borrowed. On my last axle trusses I used 3/8" top plate with 1/4" side plates. In the past I have always gone for beef vs weight savings and I am trying really hard on this car to work on that. With that in mind, Ill be using 1/4
"x4" top plates and 1/8" side plates with the exception of the front face of the front axle which will get 3/16 due to the ram. I think this should be enough since most of the 9" trusses I looked at from the race manufacturers (bomber, miller, etc) and they seem to use all 1/8". Do you guys think that'll be enough?
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Progress has definitely slowed over the last few weeks. I've been working on the final weld out and the gussets. Not the best welding, but it'll hold for sure. Just not as pretty as some of yall's work
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After the welding was done I threw it back up on the table to check straightness, and I'm very happy. The car stayed very straight and square. The only 2 locations that moved at all were the outer skid tubes pulled up about 1/8" and the door bars pulled in about 1/8" as well at the node. Overall very pleased with how it came out, I was worried with not having a jig for it.
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WiscoF100
Well-known member
A racer who got me into racing KOH said,
“These cars are built with tape measures”
Ultra4 is about fortitude and driver skill not how straight a car is. Cause it won’t be straight anymore in front of the Jumbotron.
Your work is killer so far
“These cars are built with tape measures”
Ultra4 is about fortitude and driver skill not how straight a car is. Cause it won’t be straight anymore in front of the Jumbotron.
Your work is killer so far
welndmn
Well Done Man
Big, it's funny how I see people build a frame that is with in 0.010, you take one jump while racing and it's moved.
I do say strive for perfection, but don't let it get in your way either.
WiscoF100
Well-known member
welndmn, nailed it. Yes, set the bar high but don’t let it bring you down either 
Craftsmanship 🇺🇸 or 🇨🇦 for Mitch
What are your truss plans? Are you going for box construction or open frame? I believe in 3/16 or less construction and I fall somewhere between the purpose of a truss is a link mount and anti smiley face axle structure.
Craftsmanship 🇺🇸 or 🇨🇦 for Mitch What are your truss plans? Are you going for box construction or open frame? I believe in 3/16 or less construction and I fall somewhere between the purpose of a truss is a link mount and anti smiley face axle structure.
Ghetto Fab.
No idea what I'm doing
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I don't think I've ever seen anyone use a chassis fixture that would prevent warping. None of them seem strong enough for that. They are mostly just tube location devices. You do the best you can with what you have.
Have really enjoyed the vids on social! Keep at it!
Have really enjoyed the vids on social! Keep at it!
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- #129
Thanks guys, appreciate the input! Ya i definitely agree that it will move. My goal for keeping everything close is mostly so that I can get all my panels plasma cut and know that they'll fit. I don't enjoy paneling work to start with, so the easier it is the better
i find them amusing and have to say your line "limited time because i got a hockey tournament this weekend" was so candian, i laughed in real time. keep at it bud youre killing it
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The trusses will be a basic box construction. No speed holes (We race in mud quite often, as much as i hate it). Upper links will be mounted to it and they will also have some internal bracing that gets filled in by the front and back plates. Top plate I have planned at 1/4"x4".
Hahaha thanks! I was deep into the stereotype there without realizing it
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So anyone who is following me over on instagram (https://www.instagram.com/broken4_racing/ - Shameless plug) saw that last weekend I had a bit of an accident in the shop. I made a few mistakes here that I recognize, but thought you guys would enjoy it.
While putting in the drivetrain, the ratchet strap slipped which shifted the weight and ended up ripping one of the bolts out of the head that I had the chain attached to. Shouldn't have used a ratchet strap, and should have had longer bolts. Oh well, mistakes happen. At least nothing was really damaged and I wasn't hurt.
Of course it dented the brand new transmission pan I had installed the previous day... So had to spend some time straightening it back out. Overall got it very close and hopefully should still seal.
While putting in the drivetrain, the ratchet strap slipped which shifted the weight and ended up ripping one of the bolts out of the head that I had the chain attached to. Shouldn't have used a ratchet strap, and should have had longer bolts. Oh well, mistakes happen. At least nothing was really damaged and I wasn't hurt.
Of course it dented the brand new transmission pan I had installed the previous day... So had to spend some time straightening it back out. Overall got it very close and hopefully should still seal.
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ridered3
Low Talent Wheelin
Insert the "Shake Hands with Danger" tune!
Glad you were alright and only ended up with minimal damage that you did to metal and pride.
Glad you were alright and only ended up with minimal damage that you did to metal and pride.
WiscoF100
Well-known member
Did the windshield bars land as you had planned?
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Yup! Came out beautifully. Took me about 3 hours to notch these by hand though
For those that aren't following over on instagram. For these V bars, I decided to bend 1 tube in the middle and double the angle and then chop it in half. Saved me probably 6-8" of wasted tube, but also only needed to do one bend which saved some time.
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Thanks! I really appreciate that. I spent alot of time in the design phase trying to really nail some clean lines.
I think the miller cars also have the bent v bars. I hate the look of the straight bars and how they make a gap at the windshield.
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- #138
May as well throw some more up during 4400 power hour right? Lol
Finished off the tubes in the back of the car. I kept them out for better access to some welds, and I also wanted to see how straight some of those longer tubes were going to stay.
Pretty happy with how they came out.
Finished off the tubes in the back of the car. I kept them out for better access to some welds, and I also wanted to see how straight some of those longer tubes were going to stay.
Pretty happy with how they came out.
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ridered3
Low Talent Wheelin
Looking mighty good!
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Well, I suppose its time for the post Hammers Depression to start hitting.
Made up some of the rear axle mounts. I'm trying to bounce back and forth between a few different projects on the car with the hope that it helps keep me motivated lol
Made up some of the rear axle mounts. I'm trying to bounce back and forth between a few different projects on the car with the hope that it helps keep me motivated lol
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WiscoF100
Well-known member
If the flanges pass the eyeball or straight edge test, then you should be fine. Maybe make yourself some flange stiffeners/girdles? Lots and lots of Rightstuff?? JB weld?
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It is passing the straight edge test so I'm sure it'll be fine lol Ill just buy a new pan before throwing RTV at a trans pan gasket.
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- #144
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ridered3
Low Talent Wheelin
Nothing like "durability testing" in a race environment!Got the engine mounted up into the chassis last week. Pretty happy with how it came out. Should be strong enough, but i suppose it will be until its not
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- #148
Yup! It always seems to find the one weak link that you thought was fine lol.Nothing like "durability testing" in a race environment!
WiscoF100
Well-known member
I like the split tube design on the chassis side of the bushing
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Thanks! On the current car I actually had a 1.75x0.120 tube as my motor mount and sheared it in a race, so I figured 1.5X should be good!
