For me, watching old skool N1 Civic races is like channeling ancient Gods and deities. Summon them correctly and they will return… the cars of those races didn’t have large amounts of horsepower, but they can still give a modern high performance street car a good run for their money, so don’t get it twisted.
What exactly is N1 specifications?
Engine and Transmission: the engine and transmission internals must remain OE spec. No dog box and sequential shifters. Baffles are allowed to be installed in the oil pan.
ECU: a lot of teams used various aftermarket/custom ECU’s. They are inspected by the FIA and then sealed with a tamper proof label. Some used the Mugen ECU. Injectors may not be changed. *Thought: I feel the “Mugen chips” floating around stateside aren’t real Mugen specs. Only a few shops in Japan have the exact copy (and legit Mugen ECU’s which they hold on to) of the maps and sell them.
Exhaust: teams are not allowed to change the exhaust manifold. Since the B series came out with a 2-piece header, teams are allowed to change the lower part of the manifold and back. Thus having a exhaust pipe as straight as possible with minimal bends.
Intake and Cooling: teams are not allowed to change the intake manifold, throttle body size nor the filter style. Some rumors say teams developed a higher flow drop in filter or ran with no filter, but don’t quote me on that. Cooling: a full size radiator is allowed.
Suspension and Brakes: the race car cannot change the suspension geometry. Teams are allowed to use coil-overs with any spring rates they want. If the car came equipped with front and rear sway bars from factory, then they are allowed to use them on the car. Brakes: must retain OEM brake calipers. Upgraded pads, heavy duty rotors and braided lines are allowed along with brake ducts. *Fun Fact: A lot of engineers used data from all the races to develop suspension set ups and other parts to specific tracks. Example; Eikoh! Didn’t just make mufflers, but also coilovers that were designed for Nakayama and Suzuka circuit.
Exterior: no aero is allowed in N1. Depending on the rules in an event, light weight hoods are free to use. In the Honda One Make race, light weight parts are allowed.
Interior: Dashboard and front door OE panels must remain intact. Roll cage required.
N1 spec example:
The kanjozokus pretty much run the same set ups at the N1 cars, more or less. However not all have aftermarket ECU’s. The veterans (& ones who know they can get away) use performance ECU’s or a stand alone and even aftermarket camshafts. While the younger generation might only be using the OEM ones.
The spirit is still there. The deities are floating around it. Can you see it? Summoned from tantric mantras and Ngakpa’s, I bring you N1 Magic. This is the brand name of all my one-off parts I have made and designed for my chassis(s) and much more. Just like the Private Runners stickers, they won’t be sold to the public. Personal use only. They are sat with sage and blessed using Ancient rituals and chants. Long live N1!
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