• Protip: Profile posts are public! Use Conversations to message other members privately. Everyone can see the content of a profile post.

My NSX finally has forced induction...but it's been a long road...

Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
Well folks, I now have forced induction, but not in the way I was expecting. Grab a beer, it's long story time!

I posted a short "thank-you" post on the NSX Prime FB page a few days ago, but here's the full story.

My goal was reliable power.


I purchased a used Comptech supercharger now a little over two years ago. I knew I was going to have bad luck with it when the supercharger was lost in shipping. It had fallen out of the box and was lost. I had to track it down. Because it had a unique identifying number from being rebuilt, I was finally able to locate it at a UPS lost items facility in Utah. I received the blower a week after I received the partial shipment.



After that, it sat....and sat...and sat. I took time to gather up supporting parts, including the very last Comptech targa holder and rear shock tower brace for targa ever produced before Comptech went out of business, an AEM meth/water kit, AT Motorsport phenolic plate to allow methanol to be injected after the blower, B-Line CAI, and gauges.



After everything sat for more months because of my work schedule, I finally drove to Source 1, near Cincinnati, in May 2019 for the planned install and tuning of my kit. Unfortunately, the install was not to be. It turns out that the blower had not only been damaged in the past, it had been shoddily repaired, including a bolt hole that had apparently broken off, then was (poorly) re-welded. Sure it could have been installed, but it would have leaked and would have been difficult to tune. I was advised, and I agreed, to cancel the installation. I only had the CAI installed. (Recommend! Induction should is as crazy as a turbo!) I then sold the kit, which I clearly labeled as damaged. I lost over half of what I paid for the kit. My über-rare, brand-new Comptech parts were quickly snapped up as Comptech was closed for manufacture by the time this happened. My other parts were more slowly sold off.



I learned a valuable lesson: have expensive parts inspected by someone who knows what the f they are doing. Had I done so earlier, I would have discovered sooner that I bought a hunk of junk. I’ve never outed the seller as I genuinely don’t think he realized what he was selling. In reviewing his posts on the Prime FB group, he’d indicated difficulty with tuning with the supercharger, and was concerned about a lack of experienced NSX tuners in his area, prompting him to sell. I suspect the supercharge was damaged prior to his ownership given the appearance of the repairs.



So what next? I was (I hope, understandably) bummed about the situation. I looked at options including trading in my NA2 for a NC1 NSX. I nearly traded for a local 2017 with 14k miles that had been sitting at a local dealership for months, with asking price in the $120s. While mulling things over, I was making preparation to attend the 2019 NSXPO.



A couple days before NSXPO, I received a DM from Brian Urlage at Source 1, who’d helped me through the supercharger situation as noted above. He was taking his own, personal SOS twin turbo kit off his car. It had around 8k miles on it, very little mileage. He offered what was essentially a “friends and family” price on it. The SOS TT system is an excellent, turnkey, reliable kit and I could not say “yes” fast enough. Went on to NSXPO.



As it happens, purely by chance, Chris Willson of SOS asked for a ride in my car as the group was headed off to the Air and Space Museum for our tour and group picture. I availed myself of the opportunity to discuss my situation and to ask about what would be required for my 1999 to use the SOS kit successfully. This led to his briefly test driving my car and recommending a new clutch sooner than later, and high-flow cats. My clutch has been jamming in lower gears for the last two years…and Chris’ suggestion was that the shift fork was damaged. Needless to say, after conversing with Chris, I paid Brian for his kit, and took advantage of the NSXPO discount to buy the a new SOS Sport 350 clutch and high-flow cats.



I dropped my car off at Source 1 in early November, knowing that it would be a few weeks before they could get to my car. Since the end of the driving season was nigh, I could live without my car for several months. In addition to the twin turbo install, I had the new clutch installed and other assorted maintenance done “while Ryan was in there”. I had the master and slave cylinders replaced. (Note: I had the master and slave cylinders replaced in 2019, at my local Acura dealer—not sure if parts or install were faulty, but the master was leaking at the time my car was taken apart, so the job had to be done again. It was likely adding to my shifting issues.) Install was completed, then there was trouble with the Infinity 6 that was installed. It took over a month for AEM to respond and send a new unit out. My climate control unit finally died while at Source 1. They sent my CCU to Brian Kiehnau for repair.



Once done, my car was tuned. The dyno sheet indicates “Dynojet” correction to 453 whp and 381 lb/ft. The dyno was done on a Mustang and the numbers were 411/346.



I was able to pick my car up just before Ohio shut itself down for the COVID-19 response. I am thoroughly enjoying having torque at any rpm. It is…very fast. My first serious highway pull took me to touch over 100 mph before I knew it. The Sport 350 clutch, so far, has been awesome. No chatter, all shifts smooth, no more jamming of the lower gears. Pedal effort is not onerous at all. Highway fuel economy at 80 mph was 18 on my first tank, but then again, I was mashing the accelerator a lot on the 220 mile trip home. I’m still in the process of re-learning how to drive the car.

It’s a new car and I am enjoying greatly. While I still love the NC1 NSX, I can put one off for a while longer.

Thanks to both Brians (Urlage and Kiehnau) and to Chris for their help. I was happy to hand them some money, and you should, too :) .

Here's a link to a POV video I shot a few days ago while driving my newly modded car.


 
Rating - 0%
0   0   0
Joined
Jan 30, 2001
Messages
22,332
Location
Pa
very nice!!! Said in my very best Kazakhstan accent! It is so nice to be able to drive knowing the car is sorted!
 
Rating - 0%
0   0   0
Joined
Mar 15, 2005
Messages
3,137
Location
Plymouth, Michigan
Enjoyed write-up NBob! Congrats to ya - perseverance paid off :biggrin:
 
Rating - 0%
0   0   0
Joined
Jul 11, 2014
Messages
1,432
Location
Chicago, IL
Well-said, Bob. Every so often I get the itch for a turbo. Maybe you will upgrade to an NC1 after all and send your tt to me. I will take care of it.
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
very nice!!! Said in my very best Kazakhstan accent! It is so nice to be able to drive knowing the car is sorted!

Definitely. Key is finding people who know what they are doing, and having vetted parts.

Enjoyed write-up NBob! Congrats to ya - perseverance paid off :biggrin:

Thanks!

Well-said, Bob. Every so often I get the itch for a turbo. Maybe you will upgrade to an NC1 after all and send your tt to me. I will take care of it.

It’s more likely that I’ll add a NC1 to the stable at some point :D .
 
Rating - 0%
0   0   0
Joined
Jul 8, 2003
Messages
2,298
Location
Hole
i've had my SOS twin setup for pushing..8?? maybe 9 years, it's been exceptionally reliable. And I do mean exeptionally. I have tracked the car for thousands upon thousands of miles with the kit and no complaints.
 
Rating - 0%
0   0   0
Joined
Aug 7, 2015
Messages
568
Location
Princeton, NJ
Did you end up swapping your shifter and did it fix the grinding issues?

Great story. I've heard nothing but great things about the SOS TT system.
 
Rating - 0%
0   0   0
Joined
Jan 30, 2001
Messages
22,332
Location
Pa
love the camera on the head.....so alien....so human...so tinky winky:tongue:
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
i've had my SOS twin setup for pushing..8?? maybe 9 years, it's been exceptionally reliable. And I do mean exeptionally. I have tracked the car for thousands upon thousands of miles with the kit and no complaints.

I kept rereading your SOS TT feedback thread before purchase and during the build, and it gave me confidence to keep going. My only regret, is that I didn’t simply go with the TT kit in the first place.


Thanks!

Did you end up swapping your shifter and did it fix the grinding issues?

Great story. I've heard nothing but great things about the SOS TT system.

Didn’t change the shifter and I didn’t have the transmission looked at. I had a minor fifth gear grind with fast shifting. I’ve looked for it and don’t notice it anymore. I also had occasional stuck shifts when downshifting into third and second. Replacing the clutch seems to have resolved that issue. It hasn’t happened even once, and I’ve now got around 500 miles on the new clutch and master/slave cylinders. Other than getting used to not overpowering the clutch in first gear, the new setup shifts “like butter”. Very satisfied with the SOS Sport 350 so far...though some of that is because my old clutch was on its way out.

love the camera on the head.....so alien....so human...so tinky winky:tongue:

Easier than taking one hand off the wheel for video! :D Safety first, as they say...
 
Rating - 0%
0   0   0
Joined
Feb 3, 2014
Messages
117
Nice! sorry we couldn't see the SC, come to a finish but NOW YOU GOTS TWINS!!! let see the dyno. botton end response must the nice now lole a 911 turbo!
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
Now I’ve got 1500 miles on the setup. I am just driving the shiz out of it. Tune had to be tweaked to allow VTEC to activate with throttle pedal at 25% and that completely rid the car of the little bit of sputtering it had. So much more enjoyable and smooth to drive now...

I need to dig the dyno sheet out and post it...
 
Rating - 0%
0   0   0
Joined
Jan 30, 2001
Messages
22,332
Location
Pa
...was going to ask how its going...very happy for you.
 
Rating - 0%
0   0   0
Joined
Aug 23, 2017
Messages
59
Location
Ile Des Chenes, MB
Very nice, congrats.

how much psi are you running?
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
8 psi IIRC, as are others with this setup and power level.
 
Rating - 0%
0   0   0
Joined
Jan 30, 2001
Messages
22,332
Location
Pa
.so 4 months in...how many miles? and any unforeseen issues?
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
.so 4 months in...how many miles? and any unforeseen issues?

My mileage above was off a bit. I’ve just gone through 1500 miles on the system, when I wrote the post mentioning mileage above, I was closer to 700 miles. No issues at all outside of the adjustment to the tune noted above. No leaks, no nothing. I did a 250 mile road trip last weekend and the only hiccup was intermittent AC...will probably have the climate control unit looked at again when the driving season is done.

Clutch is now fully broken in and I like it better than I did initially. It’s now easier to get into first gear. At first, first gear was more an “on-off” thing, as if the contact patch was tiny. I’m either used to it now, or the contact spot feels a little wider now. I was told to expect some chatter and noise with this clutch, but I definitely do not have either.

just getting to this thread now. congrats on working out the issues... many have us have "been there". you worked with two very reputable NSX shops and it shows!

It was definitely a process. In retrospect, I should have gone turbo from the start. In particular, the cooling solution from SOS is “no muss or fuss”, it comes with the kit, and it’s very effective. I’ve monitored IATs and they are consistently reasonable, no matter how hot it is. The turbo vs supercharger decision was one of those “you don’t know what you don’t know until you experience it” situations.

Circling back to the beginning of the story, the white 2017 local to me, that I almost traded out for, is STILL for sale, still for the high $120s! LOL they must not really want to sell it...been on their lot for 18 months at this point.
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
Here is my dyno sheet. Don’t ask me to interpret all, I am no expert. As was explained to me before I picked up the car, it made 411 whp/346 ft-lb on the Mustang, and the numbers you see here are “Dynojet-corrected” LOL.
c61648e262250aee0c343335f1757548.jpg
 
Rating - 0%
0   0   0
Joined
Jan 30, 2001
Messages
22,332
Location
Pa
since the average NA2 engines listed on prime stock put down 230-250 rwhp you are doing nicely.From my reading the mustang underestimates power and the dynojets overestimate .
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
To make it easier at Cars and Coffee, I just say “450 to the wheels”. Works well enough, I guess. Either way, this puppy scoots.
 
Rating - 0%
0   0   0
Joined
Jul 8, 2003
Messages
2,298
Location
Hole
just realized you also have a ctsv. i had an 09 making 760rwhp at 12 psi. that thing was a goddamned beast.
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
just realized you also have a ctsv. i had an 09 making 760rwhp at 12 psi. that thing was a goddamned beast.

DAAAAAAAAMN. I also had an ‘09 6AT sedan prior to my wagon. Just with an intake, tune, and smaller upper pulley I was making 570 whp, which was plenty for my needs. I’d probably have killed myself with 760 whp LOL!
 
Rating - 0%
0   0   0
Joined
Oct 18, 2015
Messages
1,161
Location
Cleveland area, OH
One year plus update and all is good. At the end of last season, I found a couple drops of oil under the oil pan. However, none since. Oil level is barely below full.

Time for an oil change, though, before my first road trip of the season, to East Meet in NC.
 
Top