So I finally installed the cruise control switches on my '07 Base 350z (DIY Guide here, for anyone interested) to enable map switching once I got tuned. I just finished up my tune today at Motiva, and everything is working! This was done on a dynojet, but it seems like i'm relatively low in WHP & torque in comparison with the other naturally aspirated HRs here. What do you think?

Dyno Tune : $750

Mods
- NISMO R-Tune Dual Intakes
- Agency Power 3'' Single Catback
- Motordyne Y Pipe w/HFC Attachment
- Motordyne ART Pipes

 

You should be in the 290 area with those bolt-ons at least on an SAE dynojet.

 

18hp from the tune? If so that's fantastic. Also please do not get involved with the hype of dyno racers. The only thing from a dyno you should take is baselines vs mods tune etc. people can set up dynos however they want. Make them read higher so kids get happy and send their friends to them and give them a 300hp z/Civic.

 

When they asked me how much I was expecting I said close to 300, and they looked at me like I was crazy. The only reason I said that was because of the other dyno sheets other members have been posting here with similar modifications

That's true, but I was starting to think maybe something is seriously wrong with my Z if my numbers are that low. This shop is very reputable in the Southwest region, so maybe their dyno machine is calibrated very accurately to not give those type of readings - Either way, I'm not entirely sure

 

Your before graph is worthless, there is a break/spike in the torque line and they stopped the pull early. Car looks like it gained pretty well, and there isn't much you can do about the final numbers, take the car to the track and look at the trap speeds, will be in the same range as most HR's with mods (106-109), and you will know your power is in the normal range. Dyno numbers are pointless.

 

You should have checked the H.P before moding. Many times some mods reduced H.P. Telling you that your H.P. is low for an HR doesn't do a thing but make you feel bad.
At this point, I would recommend the same advice that previous poster gave you. My 04Z PURE stock did 99 mph in the 1/4. My moderately moded 08 does 108/109 mph. Go to the track. If you do 104/105 mph, you're fine.....

If you say that you don't want to go to the track for a test, or you're not such a good driver, then do this.
Make a copy of your H.P. chart. White out the the H.P, curve & H.P. numbers, then just draw one that goes over 300 H.P. & of course write down 300hp to 310hp & that should solve all your problems.

 

$750 for uprev holy crap i paid $500

 

Overall, i'm pleased with the gains that I made. It feels like the power is definitely there, and so far there is no indication of anything being wrong with my car. It has 23,000 miles on it, and the car has always been meticulously cared for.

I would have liked to have dyno'd before modding. You're completely right, this is probably my biggest regret so far. Foolish of me

I do plan on taking the Z out on the track; It's a sin not to. I find myself taking a lot of cruises outside the city down curvy roads/mountain runs and this is where I really get to push the limits of the car, but not in such a controlled environment (such as the track). The only counter-argument I have towards comparing results is driver mod, i'm sure that plays a big role as well.

This was for a dyno tune. They charged me for adding 5 (4?) maps at $25/ea, which was sort of low because I was not aware of that ahead of time when I talked to them over the phone and before dropping the car off. Basically, hidden fees.. Overall, my experience there was not so great, but it was the only option I had at the time..at least with my particular goals in mind.

 

A few days prior to the dyno tune, I had to disconnect my battery when I removed my steering wheel (to prevent the airbag deploying), could this have caused a drop in power because the ECU was reset and the drive cycle(s) weren't completed in time?

 

That would not affect the tune

 

i understand that the dyno is just a tuning tool, but its still upsetting to see low numbers to comparable cars.

i was a little sad to see my full bolt on de,minus headers, make 258hp and 252 ftlbs on the dynojet.

 

I understand now that there are so many variables involved and several different factors could have affected those numbers. At the end of the day the car feels great, and that's all that counts. Next step is to take it out on the track and see what happens

I just thought of another question though - since I was tuned in Albuquerque, NM, if I move to a different part of the country, will I require another tune for the sudden change in elevation/altitude?

 

maybe is the combo of parts or it could be and improper break in of the engine? im pushing 295 with motordyne art pipes/ tdx exhaust and injen cai with no osiris tune...

 

^ that

 

I'm the 2nd owner at 23,000 miles..I sure hope this wasn't caused by an improper break in of the engine. When I purchased the vehicle, it appeared to be mint/all stock. Since then, i've only put 900 miles on it. In all honesty, it's really discouraging to see such low numbers. In fact, i'm willing to bet I have the lowest of all the HR's right now (including stock one's). I know dyno numbers are just numbers, but what if there is seriously something wrong with my car? Or if I take it to the track and it doesn't perform as well as it should?

I honestly have no idea what went wrong, I thought I did the right thing by going the Motordyne route. I also went with a single because i'm sticking with N/A. There's no CEL/SES light on, and the only thing I could blame would be the intakes. I guess time will tell... ugh

 

Also depends when u did the dyno runs + what dyno used. I was pushing 285rwhp in Texas summer @ around 100+ temps with humidity (right after it rained) on a Mustang Dyno, which runs lower results than a Dynojet. I'd expect my numbers to be much better during this time of year ;o

I will say your results are a bit low for the mods you got. You could ask the shop what other ppl say about their results as well. My tuner told me his Mustang Dyno runs approx 10% lower results than another competitor shop's Dynojet. Told me some guy had a turbo RX7 pushing ~500+ @ competitor's shop, but only pushed ~450 on his machine. If everyone @ the shop you used is running lower results, then don't be too worried. Again, it's just a number. You need something to compare with on a similar basis.

 

like 1/4 mile?

 

Wasn't too long ago and it was about 30 degrees with no humidity. It was also done on a dynojet..

I'm going to try on a different dynojet here soon to find out

 

Elevation is probably the reason for the lower numbers. Before and after increases look great. I wouldn't worry about it for a second. Enjoy your newfound Power

 

From Google Earth it shows Motiva at about 5100 ft in elevation. That's high altitude and enough to lower your readings by a good amount.