Just curious but I see we have a stickied post for the sound clips and even pics...but how come we don't have one with HP and TQ gains?? Wouldn't that, other than sounds, be a motivating factor of buying a particular exhaust?

Just my $.02

Zac

 

How bout you start one?

 

Just might have to... just need to make up my mine though on which one to get....

 

please start 1 and explain to people 2 get a dyno b4 they put it on and after and make sure all the dynos are the same and by the same tuner in the same altitude and weather and this list can keep going. Fail

 

It doesn't necessarily require that everyone be at the same altitude and weather. The important part would be to have a dyno if possible prior to install and during the same day have the dyno after install to see if there was an increase.

If there are enough people with the same exhaust we can form a general idea of the increase ( or decrease) of HP and TQ for each exhaust.

 

True... Though if you have a dyno prior to the install and after the install of the exhaust can be a measurement.

The biggest problem would be if someone did a dyno when they first got the car and then 6 months later get a dyno after an install then with temperature playing a factor could throw the numbers off alittle. But you would still get some kind of generalization of the performance to be expected if there are enough people to submit dyno's of the car after an install.

 

I can understand how some people will say that it won't matter because of x,y,z. But if we get enough people to get dynos we can make a pretty good database on which exhausts are worth the money and which ones aren't.

I for one don't want to buy an exhaust on the sounds alone but wouldn't like to get a good performance increase along with the money spent on an exhaust.

What good is it to be loud but can't back it up???

 

I was interested in possibly seeing one due to the bassani exhaust stating the TQ gains. I wonder what other exhausts were putting down on a dyno that are somewhat comparable to the design.

 

Ages ago there were a few "exhaust shootout" articles written up in some mags. SportZ mag or something had the best one with dynos and stats.

Generally speaking though, besides going FI most Z mods provide minimal gains. The variance in dyno types alone can offset those #'s completely. Plus we now have 3 different VQ engine variants in the Z so things are going to be off based on that as well.

 

Well it was worth a try to collect data on the exhausts and which Z people had with the dyno...but hey at least I tried to suggest a pretty good idea.

 

Do you still have the article, I remember reading it, it was a good read.

 

You may have a good idea, but the flux of people in and out of the "VQ" world is very large, so not everyone has seen what you have seen. And even if you have seen everything, I would not trust your opinion, without some proof to substatiate it. No offense to you, just think of it from a "newbs" point of view.

 

Regardless of magnitude of performance enhancement, its still a deciding factor in the decision making process, that as a consumer I would like to know.

As for engine variants, thats simply another variable. As long as all the variables are known, and the changes in variables are minimized what is the concern?

 

This is all I could find...a cached HTML version of the PDF:

http://209.85.173.104/search?q=cache:ZOFUiP2Z1ZwJhotos.freshalloy.com/gallery/d/10146-1/0000000007.pdf+350z+exhaust+shootout&hl=en&ct=clnk&cd=3&gl=u s

 

Post up the evidence to support that? That's all I am asking. Not that I don't necessarily agree with you, but otherwise I have to take your word, and invariably there will we 9 other people they claim a different story.

 

I think that what the thread starter wants to accomplish, is a comparison based on hard data, not our personal preferences. There's a fairly new article out in the market, where they add a spacer, an MREV2, a Stillen catback, and a Stillen intake, all power gains are dynoed immediately following the installation. It provides solid data, independent of personal preferences, that we can then use to make a buying decision.