AKMEE Engineering baseline dyno 1991 NA1 Acura NSX 365/258 to 368/263 whp/ft-lbs

[GhettoRacer]

Happy new years from San Francisco! The 20 years old NSX is still getting mad love out here... all kinds of people complimenting the car. — at Ghirardelli Chocolate Factory.

http://www.youtube.com/watch?v=ubk5JxgaKAQ

 

[GhettoRacer]

CTSC really does have a nice curve. We could not tell where the VTEC was engaging. Could you?

The car has been on the low boost CTSC (Comptech SuperCharger, which is a Lysholm 1600 unit sold as Whippe in USA) for over 11 years. Originally the fuel was taken care of by rising rate FPR but around 2007 we changed it to AEM Series 1 EMS and added a fixed rate FPR and installed 550 cc RC Engineering injectors. About 2 years ago the stock engine finally gave up at ~120k miles, smoking a lot and when the engine was finally torn down ring were all cracked.

About two weeks ago I baseline the car (check out the video above) and then we decided to play with the tune a little bit. We did a quick 2% richer, 2% leaner change (to the overall map) to see what it would do and it easily picked up 5 ft-lbs across the power band. The car don't have an UEGO in car yet we are getting that next so I can street tune it a bit more (mainly for fuel efficiency, and also I think the ignition map could probably be a bit better for on/off throttle transitions)...

I've been daily driving the car for the past 2 weeks and noticed it smokes like crazy after getting on it WOT, then closed throttle. I'm pretty sure we need to install a PCV catch can... in about 200 miles it burnt 1.5-2 court of oil! Currently researching the best solution for that...

 

[L_RAO]

I've been daily driving the car for the past 2 weeks and noticed it smokes like crazy after getting on it WOT, then closed throttle. I'm pretty sure we need to install a PCV catch can... in about 200 miles it burnt 1.5-2 court of oil! Currently researching the best solution for that...

I'm sure you've looked into the Endyn catch can...have you asked Larry if it can be modified/rigged to work on the NSX?

Nice dyno graph.

 

[ScienceofSpeed]

How is your rear crankcase breather currently set up?

-- Chris

 

[GhettoRacer]

I haven't had time to take a look because the owner was/is thinking about selling the car and he haven't been all too excited about further mods to the car but I'm trying to convince him a these are necessary upgrades and will greatly enhance the performance/reliability/value of the car.

Anyway, I think it has completely stock PCV setup. Been really busy and haven't drove the NSX this week. It's just chilling. Actually I should mentioned that, in the current tank of gas, I did not get on the car at all. After half of tank (~100 miles) all 100% cruising miles, I am quite a bit surprised to see that it has still burn 1 court of oil. :-( Looks like there will be no escaping doing a compression and leak down test... that's going to SUCK on NSX. It's super easy on Honda 4 cylinders...

 

[ScienceofSpeed]

I ask because on boosted cars, the rear breather can be an issue from oil being pushed out from the baffled chamber in the valve cover from crankcase pressure. Usually with a turbo car, this line will simply be vented. It would be good to look at this as the oil consumption you mentioned isn't normal with a healthy engine. Hope that helps.

-- Chris

 

[GhettoRacer]

Some might be wondering about heat soaking on CTSC. The car was fully warmed up so, the numbers were extremely repeatable... you can see:

My buddy that operated the dyno (Dave, owner of DNR) tends to not worry about low end (he's a drag racer) too much so he usually starts at 4000-4500 rpm... I usually like to start at 2000 rpm and pull through and I always use the same starting point... just a note. Also, the peak # varied slightly because power peak is at the top... and not all the pulls were past 8000 rpm.