Why are folks in this forum always tripping about dyno numbers. Dynos are nothing more than a tuning tool.

Get that thing on a drag strip and that will tell the tale.

Of how good you're driving skills are... not of how much power the car is making

Indeed but still you wanna see numbers helps show you the improvement

Just a long shot, but maybe check and make sure everything is bolted up properly. Your gains do seem really low with those mods. I could understand if it were just an exhaust upgrade, but something is definately off here.

That thought actually came to my mind, how do I check and make sure of that?

I really do not think his numbers are that off, His bolt on mods before tune should have got him 10-15 WHP and the tune would add about 15WHP more Which would put him right around 300WHP or so,. I made 298 WHP 240 WTQ fully bolted( Stock cats) tuned. Also AT 7 spd..

The guys with the 30HP over stock untuned is what crank HP, No to go off topic but there is no way you got 30 WHP untuned with I/E. Just IMO

So you really think it's a tune issue? Would love to net at least 300 pluse hp

Your baseline numbers 267 hp is consistent for a stock 7AT. I would have guessed 290-300 hp with your mods pretuned.

Did the tech use the same correction factor?

You definitely need a dyno tune so report back when you do.

Correction factor? I really want a dyno tune, but tuners here are not full capable with 370z, as a matter of fact they have not tuned any 370z yet so they don't know wht to expect as of yet and I don't want my car to be the ginne pig for them

Negative ghost rider. MPH in the 1/4 doesn't lie and it's for the most part a pure power number. More power, more MPH.

ET, now that is a gauge of how good a driver you are, especially in a manual trans car.

Ask me how I know.

I do think thats all it is, You would be amazed on what numbers you can see from a tune, Typically 15 WHP but sometimes a little more depending on the car. I'm making really good numbers on my SC kit through my AT :)

Thank you for your encouraging words I just hope that a use will fix this and further more hope that an e-tune will be enough

You could always check for codes even though you don't have a check engine light. My 350 was throwing a knock sensor code but wasnt throwing a cel and that was killing some power for me.

Every Z is different with mods, and the AFR will never just be lean or just rich - it's usually a mixture of both throughout the powerband. Before my tune my car was running really lean in the low-end, high 14s/low 15s. After 3K RPM, the AFR got richer and hit 13s. But after 5K RPM the mixture got pretty rich and was in the 11s and sometimes high 10s. With my current tune, AFRs should be in the lowish-12s across the board.

I'm going to re-log the car and look for timing adjustments that can be made, as well as any possible flat-spots in the AFR (anything outside of the 12 range past 1500RPM, basically).

Edit: Also dynoing nearly a year later negates the purpose of comparing dynos, even if the temp and machine were the same.

There are some things that just don't add up that we already know and I don't think looking at traps will be any benefit. This was on a dynojet with similar weather and temps. If we could see a graph or get you a/f read, this may help. There has been more than a few people who have gained 25-35hp to the wheels tuned and untuned with similar mods. Either the dyno is not reading correctly or it's your car.