Thanks for that review!! I too questioned my engine choice lol, but i appreciate the feedback.
The last use of 5v DOHC was the VW/Audi group, whose 5v four-, six-, and 8-cylinder engines remained in production well into the 2000s, until they were all phased out in favor of 4v equivalents, as the link below explains.
https://www.roadandtrack.com/car-culture/a42307473/five-valve-cylinder-heads/
And regarding the exhaust flow issue:
My hunch is that the exhaust diameter is a whole inch (25.4mm) too narrow.
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Im confused about the flow being used by the exhaust almost at 200% thing. I thought that the lines had to be at or near 100 at the end of the rpm range for economy? Thats how I interpreted the Automation videos.
Thatâs strange, from the engine I saw the flow was about 189%
1 Like
A Car for Sapporo
Itâs judging time!
26 June 2025: Sapporo Head of Car Concepts and Projects would enter his office:
He would notice the akan wasn't the only car to check, so he would continue. After opening another folder he would find the project "Sapporo Daisetsuzan"
After checking the chassis information and specifications, he would say:
âI donât know what this car is supposed to be⌠Why would you put a monocoque on a pickup truck? And again, dual overhead cam with 5 valves per cylinder⌠The bottom end is mostly made of cast, which is good considering itâs a pickup and the average customer does NOT want high service costs. Engineâs pretty reliable aswell. Why AWD and not 4x4?â
Design doesnât look very Sapporo-ish except for the black fascia between the 2 headlights and a bit in the back, but the car does look nice, it just doesnât look good for Sapporo."
Review
So deciding what vote to give to this car was quite difficult because it had the good design and everything but it missed on loads of things that had it become a non-winner.
I donât honestly understand the use of monocoque on a build such as a pickup. I like seeing that even using cast parts you managed to get quite some reliability and power, but sadly not enough torque, that is essential in a pickup truck. This time flow was excellent with everything being under 100%.
I donât understand why would u put a front vented disc with 4 pistons and put just 1 piston in the back.
Same thing as last build, why DOHC-5 
.
Overall the build is good but there were some things that you couldâve refined that wouldâve had made this car a winner.
I also recommend adding a speed limiter considering this is a truck.
Thatâs all for today!
Many thanks to @Ultimate_Billy for their participation in this challenge.
5 Likes
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A Car for Sapporo
Itâs judging time!
4 July 2025: Sapporo Head of Car Concepts and Projects would enter his office:
He would notice on his desk the 2 remaining cars: "Sapporo Kamui and Hayate"
âThese 2 cars both look very good, but engineering wise, there were some problems in the Hayate.â
âStarting with the chassis, it used a partial-monocoque design, which is not necessarily bad, expecially due to the size of the truck (which is relatively small when compared to other pickups).
The flow of the engine parts is messed up badly. The designer decided to use a VVL and Turbo injection, which is kinda crazy if you ask me, but apparently the truck doesnât have any reliability flaw, which makes it some kind of new system that sapporo could use in the future?
The truck used AWD instead of 4x4 which might not be one of the wisest choices, considering the work the truck has to do. Again, why the heck would the pickup use 6 pistons in the front and 1 in the back for the brake calipers??â
âThe Kamui has everything good for a pickup truck overall.â
Review
Man was this final judging harsh. Mostly because the Hayate had it in the design part, but when I saw the engineering used in the Kamui, it was chef kisses. Everything down to the microscopic detail was well made in the Kamui. The Hayate looks way more like a Sapporo compared to the Kamui, but sometimes engineering is better than design. If this wouldâve been a CSC or any challenge that only requires design, the Hayate would have won for sure.
If I had to criticize something about the design, I would say the Kamui has a lack of fixtures on the car and has a very empty back section while the Hayate was overall full of body molding and details.
Final Verdict:
1st Place: Sapporo Kamui by @MrdjaNikolen
2nd Place: Sapporo Hayate by @lotto77
3rd Place: Sapporo Daisetsuzan by @Ultimate_Billy
4th Place: Sapporo Akan by @DuceTheTruth100
Thanks again to everyone who participated in this challenge, hopefully next challenge I make will have more participants 
5 Likes
Well, I would like to congratulate the winner on his first win in Automation challenge.
Iâm very sure that particular placement was quite a surprise, considering how well-designed one particular entry was.
Also congrats on other people involved for participating and hosting and we shall face off somewhere else.
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