NSX 600WHP turbo project

Hi everyone.
You proably know me /joined on this forum on 2008) and my car, but i would still like to represent it to you and tell you the whole story about it.
I am the Austrian owner of yellow Acura NSX C30 year 1994. Last year i decided to go for 250HP nitrous shot so i went to dyno tuning service in Slovenia for remapping the car.


Car on a dyno
http://i332.photobucket.com/albums/m337/tunerc/Fotografija399.jpg
We had big problems with injecting more than 60% of nitrous shot as engine was capable of digest only 60% of 250HP nitrous shot (NX direct port system), remaining 40% of nitrous shot was still in the intake manifold.
What we could get from the car was 373WHP and 417 Nm of torque (307ftlbs)
http://i332.photobucket.com/albums/m337/tunerc/NSX22.jpg
dyno plot is stock NSX and nitrous powered one (same car)

The car was runing very good and i was happy with it, but this year i decided to go for something meaner-turbocharging.

After several months of talking to different companies about purchasing a turbo kit we decided to go for Angus /AP-X custom turbo system. Thanks to all companies who have replied to us, but this is the decision we made, AP-X which will be powered by genuine Garrett GTX35R turbocharger.

The engine block is already at Larrys Auto Machine (www.larryspower.com) where they are installing Darton 93mm (so overbore) sleeves and pistons are custom ordered from CP with 93mm bore, 9:1 compression ratio and skirt coating, for less friction.
Also at the last moment we decided to go for better rods as we were a bit affraid that stock titanium rods can go bad as they have a decent mileage done already. So we pick Pauter X beam rods.
This power will be controlled by AEM EMS standalone ECU and Slovenian tuning company called TUNERC will do the job on their Mustang dynamometer MD-250 as they did my car before and many my friend's car with good results and witout any problems so we've built a trust in them. They also passed ACP course at EFI University in California four years ago so we are sure they know what are they doing.

This is what i wanted to tell you now, at start, but how the things will move on i will let you know from time to time. I just hope that the companies who sleeve our block, who make our pistons, rods and turbo kit will do their job fine and in advertised time.

Thanks to all.

Good luck with the build, I can tell you from personal experience that 600rwhp will result in an insanely fast and fun NSX!

Keep us posted,
Brian

Are you going with a GTX 3582R?

Which injectors/clutch? Any trans upgrades? 600rwhp is where driveshafts and tranny's start to come apart.

kookoo4nsx: yes, that turbo.
injectors will be RC 750cc and 60psi of fuel presurre with high flow fuel pump.

Transmission and axles will be stock for now as we will use boost by gear system and this way we will lower boost at low gears.
Even if we reach only 550WHP we will be happy as those numbers on a Mustang dyno means that will be more than 600 at dynojet or similar inertia dyno.

RPS twindisc clutch

Good luck and if you are near Rijeka you can give me a call.

from my experience , i can tell you that you will be needing some serious FAT tires in the rear with a good suspension and of course big brakes. when i switch over to high boost setting 14psi @ 625 whp E-85 , things go by soo fast that its scary

I've been down that path before. I've been through the entire spectrum up to 650 whp. It will cost you twice what you expect and once you starting hitting 600 whp, be prepared for all sorts of things to start breaking. The transmission, axels, engine mounts... just to name a few. Glad you went with new rods as the titanium stock rods will snap. You will absolutely need wider tires (to get any use out of anything beyond 500 whp), and a very stiff suspension (unless you like to bottoming them out.) I would keep in budget a brand new motor; ask anybody who has been past the 600 whp mark who hasn't blown their engine. Oh and brakes... you'll realize how completely inadequte the stock brakes are after around 550 whp. And don't even think of tracking your car with stock brakes and 600 whp unless you've updated your life insurance. Just a few pieces of friendly advice. :smile:

Ok ThX Vegas:redface:

I think for the setup you are discussing, personally I think 550-600 whp would be just fine. Like I mentioned before, I had minimal problems at around 550-600 whp, then when I went past... BAM then it was like everything started breaking. It could have been just timing or bad luck, but I found it really starts pushing the limits of the NSX chassis and reliability. Can it be done, sure and there are people who are doing it. But for some reason it doesn't seem to be linear on the number of problems going from 550-650 whp as it is from say 400-500 whp. But best of luck to you on the build! :smile:

What do you think is limit for transmissions and axles?We will use boost by gear system and this way we will lower boost at low gears ,I think that's gentle for axles and transmission.

It's hard to say because every NSX is so different. Also it really depends on a lot of different factors. For example if you are driving on stock sized street tires, then your drivetrain won't see a lot of stress because your "break point" will be at your tires (fruitlessly spinning and burning out).

For me, I had a widebody with very thick 305 R-compound Toyo R888 rear tires. It transferred a lot of torque to the axles and transmission so somewhere in-between 600-650 whp I broke my axles and could see/hear the tranny starting to go. However, I was also doing a lot of 1/4 runs and some very hard power shifting and clutch dumps as well so I'm sure that didn't help either.

You might be ok depending on how you drive and your tires. You could do what I did, and just run them until they break and then replace them. Snapping an axle isn't a catastrophic failure like throwing a rod, so there isn't as much liability running it until it breaks.

My new setup should make around 800 at the wheels......having said that it will be tuned down to 550ish because anything more than that on the street just isn't any fun

.....plus I'm tired of breaking stuff

My sleeved 3.2 L
Cp Pistons
Pauter Rods
and more:redface:

Who did your sleeves (golden eagle, AEBS, Darton etc)? Did you retain stock bore? Machining looks great your motor should be a nice monster.

doesnt look like a golden eagle sleeve or darton sleeve. I am guessing AEBS T sleeves, since I had them on my old B series and it looks identical.

There are darton sleeves .
Stock 90.5m bore to 93m (9.2:1 CP Pistons)

do you mean that you shipped the engine to US to do the work?

where are you from in Austria? I'm from Italy and I'd like see your car once is completed

yes to usa(larryspower.com)i"m from
austria

NSXZERO said:

There are darton sleeves .
Stock 90.5m bore to 93m (9.2:1 CP Pistons)

Click to expand...

wow, I have never seen darton sleeves like that before. Then again I havent been looking into sleeves for a very long time.


EDIT:
Like I said theyre AEBS sleeves:

http://larryspower.com/engine/AcuraNSX-AEBS.html

unless someone on here recently had their nsx engine sleeved at larryspower with aebs sleeves.

hmmmm,orAEBS sleeves

darton sleeves are generally like this:

http://www.nsxprime.com/forum/showthread.php?t=129267

yes ok.i dont no,sleeved by larryspower!

Angus Turbo with Gtx35r