ERZ to motordyne ART pipes
 

I am making the switch from the ERZ/CNT test pipes to the motordyne ART pipes, mainly because my dyno with the erz test pipes seemed a little low and they produce alot of rasp, some have said the art pipes have noticeably less rasp than most test pipes. I will post both dynos with erz and with art pipes once they art pipes are installed.

In for before/after results.

me too!

sounds interesting

Got this done yet?

Looks like he did according to his sig.. Now we just need a comparison review

Yes the conversion was done, just waiting for my retune to get a good comparison. I also switched my k and n intakes to the stillen gen 3's, I actually had another dyno done but that was with the tune for the k and n intakes and erz test pipes, before the conversion it put down 298, and after was 290 but that was with the other tune, I'm going to my shop to get retuned tomorrow will make another update. With that being said is it common for me to get those lower numbers with the supposedly better parts in the stillen and art pipes because it was tuned for other parts?

doing a dyno on different days, regardless of what you have changed or changed nothing can be vastly different

you can go back every month to the same place with the same setup and each month your dyno will read differently.

most places that always ask for comparative dyno's always ask for them to be done on the same day in quick order with as little variability.

I believe you've messed up with the intake change, the MAF sensor doesn't really like aftermarket tubes/disturbances.

I believe in tooth fairies and the hoards of childrens' teeth that they covet.

I believe i can fly?....

+1 Dyno's need to be done same day, possibly around the same time. There are too many factors that can change your numbers when you go different days and times

Well I'm going tomorrow so we'll see if not I'll have basically new gen 3's for sale

You can see variation on the same day too -- intake air heats up, engine oil heats up, etc.

So long as you are looking at SAE corrected numbers on the same type of dyno (ideally a dynojet, as they are all calibrated the same), the comparison will be meaningful and informative.

Do you have a graph of the runs? What kind of dyno?

Dynojet I'll upload em tomorrow

In for results

I'll sub

Ok dyno has been completed final numbers with the stillen intake and motordyne test pipes 297whp 253 tq, the guy tuning my car said he tried and tried but couldn't squeeze anything else out of that set up, he told me that he thought the y pipe could be causing to much back pressure or something along those lines, and at an h or x pipe would be a more ideal setup for my car...any thoughts. O the 297 was also the last pull of the day so the car was very hot

Top Speed exhaust uses a y-pipe? What size is it?

Edit: Oh wait...Top Speed uses OEM y-pipe? That's definitely a pretty pointless exhaust then. You just wasted money dynoing a car while using the worst and most restrictive part of our OEM exhausts.

It's not the oem y pipe and its 3 in, but even if it was why would you think that it would be pointless to do a dyno when I have other bolt ons?

Wait so u lost 1 peak hp after all that? What about mid range? What about tq? afr's? Can u somehow throw the before and after dynos up for comparison?

im confused.

I don't have the dynos right now I'm back in school and I am away from my z I'll post em up this weekend but yes I did lose 1whp but gained 2tq, the tuner seems to think the y pipe is causing the lower gains because my stock dyno was with the nismo exhaust and it is an h pipe

I wouldnt worry too much about that man.

Like i said and others said, dyno's on different days = hard to really compare back to back, unless you run them at some super awesome facility which can control air temps, humidity etc etc. But even then, they could be diff everytime you go back.

For example, if you went back this weekend and just got a dyno, your numbers would be diff. Heck ask em if they will give you one or 2 free runs just to see that out.

One decent way to see how your numbers line up is to go to a dyno day.

2 years ago when we did a dyno day, all the stock Z's posted up numbers within 3 whp of each other.