FWIW, in some cases, dyno calibrations seem to be always in a state of flux. In the most recent turbo magazine, they tested several dyno types in one day with one car. Turned out that the Dynapacks read higher than the Dynojet. And the highest of the lot was the Dynamic Test Systems which, btw, is a look-alike of the "notoriously" low-reading Dyno Dynamics dyno. Go figure...

My 2c,
Shiv

 

THANK YOU ALFREIDESQ. Some one finally gets it . The fact that people are ready to go to war over which exhaust is better is something I will never get. You see this kind of thing all of the time, especially on the Subi forums. The best case for al of this crap is on the last pages of tuning magazines where all of the WRX exhausts are compared. I think there are like 13 of them, and 10 of them are within 4 HP of each other. The price for this 4 HP between manufacturers is something that more people need to pay more attention to.

 

I'm absolutely with you on this idea of tuning the car conservatively for street/every day use. I'm totally opposed to running dangerous settings that could result in engine failure..... What makes me leery of taking anybody's word for the safety of their settings is that I don't know how much variance there is between cars... Does anybody know if the EVOs have sufficient levels of variation from car to car so that "safe settings" on one car can cause a motor to granade in another?

As far as the exhaust choice I think they are all very close in ultimate performance and the main concern for me is quietness/quality of sound, durability, and close to perfect match to stock installation. I think it's silly to go to war over which exhaust is the "best"

 

Awe…. Bovine droppings. Buschur has been using his 2wd dynojet for years and tunes customer cars as well as his 7.68sec 2.0L 4G63, because that is what he owns. He is well known to be straightforward, blunt and honest. Your implication that his results are padded intentionally is unfair. Implications by others that he has tweeked the AFR to the edge of doom in order to claim most HP also stink. Few have more experience tuning this engine than Buschcur. Nobody has the resume of success campaigning a 4G63 in Pro Import Class than Buschur. If you have concerns about his baseline numbers, go to his website and ask him about them, but don't imply a disregard for his customer's investment.

These dyno wars are ludicrous, causing confusion and presenting results that in some cases are in-explicable relative to the laws of thermodynamics and physics. I.E. Drop an exhaust on a turbo charged engine and (assuming OBDII is not interfering); get zero HP increase? OK.

One more time, numbers between different dynos for the same car are meaningless; you can't compare them. If you do, your a dork. No two dyno’s will ever read the same for the same car! The gain/losses on the same dyno are all that can be compared. I'm using a $150.00 road dyno and it is just as valid as a yardstick than any other. If another dyno reads higher than the one your using, tough. Until someone starts handing out trophies and cash for “best dyno run of the year”, who cares. The drag strip or track will sort out the best values for performance mods.

Al,
These "discussions" are aways going to lively, but I don't want to lose site that you and incognito and others are finding the best mods path for the rest of us. Thanks for being a pioneer! You guys are "writing" the FAQs for tommorrows owners and it is exciting to see your progress and enthusiasm.

Speedlimit...

 

Thanks

BTW - I want V-bands on my exhuast - thats the only way to go if it has to come on and off the car many times

 

I'm not so sure about this. I've not seen the WRX exhaust roundup, but I remember a RSX and a Celica roundup where there were a large gap between the top and bottom. Besides, you only get 4-12hp on a typical catback exhaust anyway, the low end being the NA motors. So yes, a few hp SHOULD make a difference to most people, especially if it is one of the few mods you are going to do. Now if your going to spend most of your time on the track and are planning on building your whole motor, then a dump tube right out of your DP from under your front fender is all you'll want/need. But for people who don't have a lot of money, who want to keep their warranties and only want a few mods, perhaps 2hp will make a difference to them. That little 2hp difference now, might also make more of a difference later on as the mods do add up for those who do plan lots of mods.

Now, the big question, would I pay $1200 for a Super Dragon Ball Z84 PS9 exhaust made of adamantium that will save 10 pounds and has a cubic zirconium polished 5" tip and will add 10hp or would I just pay $399 for a Maganaflow muf welded on to generic mandrel built pipe that adds 8hp but will only save 2 pounds?

Well, thats for every consumer to make his or her mind to choose. I for one, like having choices. Style, looks and weight are other things to consider. Some people have a cost be damned, money no object atttitude (like the racing teams where this technology comes from) and will pay anything to have an edge, however slight.

 

I second speedlimit!

People need t get off their high horse's with this whole my car makes more HP then your car. The only thing a dyno (referring to the @ wheel dyno's) is good for is true tuning and power gains when adding parts. The gains will always be the same no matter waht the dyno and I think that is what Dave was trying to point out on his dyno. The fact that he gained 90hp at the wheels on a stock motor/turbo/IC with bolt on parts is beautiful. Talk about a sleeper other then the fact the car looks fast from the factory, but still having that car pull up to a viper and take it is hillarious. I hope they break 11's Good luck to them.

 

I'm glad they got good numbers out of their car.. I'd really like to see what kind of numbers they run at the 1/4.

 

You missed my point idiot. When shops post dyno charts bragging about power gains and using them as marketing tools its pretty damn lame when the numbers are off the braggers dyno. I'm not freaking talking about tuning or parts testing on a dyno, I'm talking about marketing and power bragging.

 

Idiot? How old are you? Thanks for your reply which makes less sense that your first post.


Speedlimit.......

 

Yep, I agree that did not make much sense.