[MOC] Modern Hot Rod (V8 pushrod)

[JoKo]

Hi there! I d'like to introduce this new hot rod that I built last week. I think it will please the most petrolhead of us. It all started with a new fake engine design. (inspired by @Davidz90 prototype) I build a detailed pushrod V8 and I obviously needed to build a car around it! Hot rod was the obvious choice for an engine like that but I wanted something not only fast on a drag strip but also fast around a race track or on mountain roads. The result is this single seater open-wheel hot rod race car. It features complex independent suspension with heave springs. That means "soft" springs are activated while hitting a bump but hard springs are compressed when downforce pushes hard. This is especially useful on F1 cars or time attack cars with crazy downforce. (more about heave springs: https://youtu.be/lNInCfCkrkE?si=8iLd5RCi501bPpOs)  Because I used motorcycle springs for this role, different spring length set different ground clearance.

When the moc was 80% finished I could not make up my mind about what this car will look like. I finally tried three different versions:

• Road Legal: With lights, grooved tires, small front spoiler 
• Track Day: With slick tires, big front wing, rear wing and diffuser
• Pikes Peak: bigger front wing with paper plane deflectors, roll cage, bigger side skirts and rear wing, and a huge roots supercharger to compensate for the lack of oxygen

Features:

• Fake engine: V8 with central camshaft, pushrods, rockers and valves
• Two speed gearbox
• Independent suspension, heave springs, Ackermann steering

 

Road

 

 

 

 

 

Track

 

 

 

 

Pikes Peak Hill Climb

 

 

 

 

Fake engine & suspensions

 

 

Video

 

 

 

I hope you enjoyed this moc! Tell me what is your favorite version?

If you want to build your own, DM for studio files. No money involved.

Edited October 16, 2024 by JoKo

[Axadder]

Road Legal seems to be the most aggresive to me, so my favourite.

Where did you get Track Day´s tires from?

Any mechanical sketch or diagram?

[JoKo]

1 hour ago, Axadder said:

Road Legal seems to be the most aggresive to me, so my favourite.

Where did you get Track Day´s tires from?

Any mechanical sketch or diagram?

mechanical sketch like this?

you will notice that valve timing is not right. It can be set to be correct on the left or right cylinders but it will be off on the other side. I did an "average" setting.

 

 

The tires are from the 42171 AMG F1. I did not like the shiny aspect of the tread so I took them for a ride on a belt sander (80 grit) until they got this realistic worn look

 

Edited October 16, 2024 by JoKo

[Davidz90]

Wow, really cool! Didn't know that custom, longer connecting rods can be built for the standard piston pieces.

Also, interesting info about heave springs.

[Axadder]

On 10/16/2024 at 4:51 PM, JoKo said:

mechanical sketch like this?

you will notice that valve timing is not right. It can be set to be correct on the left or right cylinders but it will be off on the other side. I did an "average" setting.

 

 

The tires are from the 42171 AMG F1. I did not like the shiny aspect of the tread so I took them for a ride on a belt sander (80 grit) until they got this realistic worn look

 

So, the red and blue cams act like a camshaft, if I understood properly.

The treads looked like 3d printed to me.

Personally I don´t like to grind/cut/modify parts, but I will eventually grow up. 

[mla2]

Love the look of the Road Legal version, very cool!

[JoKo]

7 hours ago, Axadder said:

So, the red and blue cams act like a camshaft, if I understood properly.

The treads looked like 3d printed to me.

Personally I don´t like to grind/cut/modify parts, but I will eventually grow up.  

Yeah, red cams for exhaust and blue for intake. This is the correct place for the camshaft in that kind of engine 

Sanding the tires was not an easy decision but to my relief I think they look better now.

[LEGO Train 12 Volts]

Wow this car is totally cool! 

I like the enhanced version of the motor used in the last part of the video!