NSX Refresh

[dan the man]

Magnificant work. Just read this whole thread as not seen it before...

Excellence comes as standard with you it seems.

[AR]

Just need to lose the nasty cone air filter and re-fit the standard airbox and all will be right with the world

Cheers

Mark

I would not say the cone filter is nasty, but the OEM box would look great on that set up.

[Sudesh]

Yeah I have though about putting the OEM box back in, but I quite like the induction sound! I though it was quite a neat install and I also have a direct cold air feed from the side vent going into the filter. I'm going to take the car to a rolling road some day soon to see what its putting out, and will swap between both filter system for comparison figures. I know CAI systems don't really do anything unless your running allot more upgrades.

[Kaz-kzukNA1]

Hi, Sudesh.

Another great work with lovely taste.
Also, I always enjoy the size and quality of your photos.

I believe your NSX is JDM spec like mine so I would like to share some of the experience from the dyno and rolling road regarding this topic.

Please note that these are based on JDM spec so some of the facts here could be different story on your NSX depending on the country model.

JDM NSX has different mapping compared to other country models.

Due to the stability of fuel spec within Japan, the ECU data will allow us to generate 280PS power and 30.0Kgm torque using high octane fuel for NA1 (3.0L) MT model. Although the official released figure for NA2 is the same as 280PS power (because of gentlemen's agreement within Japan at that time) and slightly increased torque figure of 31.0Kgm, it’s a different story for NA2 on the dyno…. Quite big difference compared to NA1...

All of the NA1 NSX that I measured as well as at my friend’s dyno showed similar power figure depending on several conditions such as weather and so on (as you know). It’s built by Honda.

For JDM NA1, unless you have modified the engine and the mapping, you will find very little gain by changing the parts around the intake box area such as air filter, box, duct. For some of them, you actually loose some torque at lower rpm band.

You can gain noticeable power by changing the header and/or exhaust but even after this modification, the effect of replacing parts around intake box area won’t have big changes on JDM NA1. A few gains were noticed on repeated measurement on the same day but not consistent.

While the car is moving above normal driving speed, the air temperature around the airbox area inside the engine bay is not that high at all. So, you won’t loose power due to the concern over the high intake air temperature above normal driving speed.

I also have experience and some data for using OEM CATS/Exhaust as well but I’ll touch on these on another occasion.

Again, above info is only for JDM NA1 MT standard model and it’s a different story for NA2 owners and it could be different for non-JDM owners as well.

Interesting...

Regards,
Kaz

[Sudesh]

Been working away on another refresh on a uk car.



After doing some initial testing of the car as it stood I noticed the radio volume knob was not seated correctly and had quite a bit of movement, so I removed the knob for inspection




With it removed I could visually see the free play, so I removed the the front plate of the radio and found the volume knob retaining nut, had shifted up the thread and was causing the problem.



I tightened up the nut, put the unit back together and all is now as it should be.

[nobby]

any more pics bud of the work you put into this car?

how are things progressing with her?

[Sudesh]

Done the usual check of cabin Aspirator fan/sensor, and as always was slightly clogged up




As always this was cleaned down and greased and working perfectly now with no annoying ticking noise.

[nobby]

the one in my car must be really bad mate, i can hear it trying to whizz round and stuff .. does not sound healthy at all ...

after a few good miles on the car, starting to notice a couple of things, hopefully nothing too sinister but i will be glad to get her up to you soon ... think she needs some of your TLC

[Sudesh]

I noticed the owner had bought one of the real nappa gear gaiters I had made up with a company in the UK, very nice finish and much better than the nasty "leather look" that came on allot of the NSX's. Only thing I wasnt happy with was the cut off point of the cable tie used, over time it would have damaged the leather, very sharp




So I cut it right back and file off and edges

[Sudesh]

I removed the blower motor for inspection and checked for any build up behind that as, the owner mentioned about a slight moisture problem in the cabin from time to time. I checked the AC drain pipe but it was fine and seated correctly with no blockage and no damp on the floors or door seal damage.



The blower motor was very clean on this car, and behind was very tidy. I then inspected the drain pipe which runs from the scuttle panel and couldnt believe what I found lol