52,000 mile re-dyno with greddy TT

phunk

today i had a chance to put the car on the dyno and see where it is. I have 52,000 miles on it now, and beat on it daily... I was curious if it was down any power or not.

2 years and probably almost 40,000 miles ago, it made 524rwhp at 7.5 psi. After a couple weeks, i turned up the boost to 8.5-9, sometimes a little more. I was also curious what it made up there but never really had a convenient opportunity to find out.

the car is my daily driver. the only thing that has yet to require service was the differential mounts. The rear mount blew out a couple weeks ago from too much no-lift shifting, etc. I swapped the mounts out for whiteline urethane mounts. which feel like stock (except not broken). I do think that my engine mounts are toast though, I feel the engine moving quite a bit. Going to swap in solid mounts in the next week or two. Other than that, I literally NEVER work on this car. Its been a rock.

Anyway, it made 586rwhp at 9psi. I really wanted to push it a tad harder just to hit a 600... I probably should have, would have only needed half a psi of boost and/or a degree of timing. Or I could have just waited out a couple hours until the outside temps dropped 20 degree. But its fine for now.

I can say from experience that running your 370z turbocharged, assuming its well tuned and well sorted, at 550rwhp all day every day, is rock solid reliable. But I do think that if I were to put it into severe duty, such as road course driving... I would dial it back to 500rwhp, maybe lower the rev limiter a couple hundred RPM, and go nuts on the cooling system. I imagine needing the best brakes, suspension, and tire setup to manage that.

EDIT: Re-reading my post makes me realize that I left out some important facts for anyone who is really big into number crunching. I did not gain 62HP with only adding that 1.5psi of boost. I also added a little bit of timing above 6000RPM. So when I first got on the dyno this session, I was making identical power at 7.5psi as I was 2 years ago. When I turned it up to 9psi, I was displeased to see it in the 560s because I was convinced that the car was going to be at almost 600rwhp. I would have sworn it was almost 600, and I had even told some people that I thought it was probably almost 600 by now, so I decided to make it almost 600rwhp by giving it the timing I could tell it wanted anyway.

After adding the timing last night, I didnt think to try another 7.5psi pull. but I would guesssssstimate maybe 540 something at 7.5 now.

Attached Images

370dyno.JPG (112.3 KB, 100 views)

__________________