tests were done tonight, I actually have some rather unexpected results... im reserving this post for after I take my girlfriend out to explain in full detail o_O

WTF - You mean you are going to keep us waiting while you @#$%## your gf !

+1 on that... but, hey maybe she is that good, so maybe we should not hold it against him :lol2:

Yeah sorry, my girlfriend and I ended up getting a little carried away last night and I didn't get back around to coming on here and posting my results :aroused: my bad..

Alright guys, first and foremost there were a few odd things that added to this test prior to the one we had done before. Air temps at times of testing were 57 degrees, humidity was at 49%, and the he and I were both using kumho ecsta SP tires... Unsure of exact coolant temps, however there was a lot of randomness during these tests.

My car had been equipped with the AP pulley and K&N V.2 intake, his was still equipped with the AEM CAI, SR motorsports clutch and flywheel, UR pulleys, autoexe header, greddy SP2, and RP test pipe. We did 4 runs in each car, and at that point my car was actually a little quicker than it was prior to the K&N intake was installed. Same thing as before, 60mph in third gear, right up until 105 before we were stopping. The difference was slight from the intake, not even half of a car, but it was noticable since we happen to test parts like this constantly. We switched drivers and got the same results.

Next I unequipped the K&N V.2, and we did it again with the AP pulley only on my car. Same starting points, our cars were almost identical after 8 total runs. So we were both convinced the intake did very slightly have an impact in this area of the testing.

Finally, we unequipped the pulley, and I was running completely stock once again. His car was able to pull about 1/2 a car on my car consistantly. 12 runs later, we came to the conclusion the pulley did in fact cause a direct impact, though small, on acceleration for this test.

Here is where things were interesting, my friend had remembered he needed to go in and get his car inspected soon, and he was going to need to put his stock cat back on. So why the hell not? We've been taking my car apart and putting it back together all night for the most part, this would only take a few minutes. RP test pipe gone, OEM cat back in action. He says he wants to see how much he had lost from putting back the OEM cat. So we decided to give it a shot.

Same as before, 60mph in third gear my car was still stock, we go...

he pulls a car and a half up to 105!!! :eek:

Shocked, we do it again and again... his car is performing MUCH better with the stock cat than the RP... Granted I'm sure the gains would be much better with the RP if he were boosted, however to see that it was actually hindering his performance was truley shocking to me. After all that, we decided to wait until thursday to put my parts back on, since we will also be installing my mazdaspeed suspension as well.

Moral of the story? We saw AGAIN the fact that the pulley did have a slight advantage over the stock, but it's nothing to write home about. For the money, it is a decent investment I suppose, as my car does feel more responsive, if only a tiny bit quicker. The real shocker was the RP test pipe, still scratching my head over that one...

Until next time :smoker:

damn

maybe that is where my 9 horses went.

Interesting but puzzling result SE3PSynergy. :scratchhe

for those who didn't know from before... his car is an 04 GT while mine is an 06 sports.. and he has about 75 pounds on me as far as body weight goes ^^

Thanks for the update, great post!

Yeah - well done SE3P . Sounds like you really did a thorough job .
1/2 a car is not huge but the fact that you showed a small gain makes it worth the $.
As for the Cat - that one will have us all scratching our heads for a while .

??

It does exactly the opposite.

1/2 car length is well inside the range of statistical variation, repeatable or not.
This means that it is still not worth the reduced cooling/charging capacity, let alone the expense.

Why are you such a fanbois on this?

Dude you would have to test on a dyno for any real tangible results in order to have a chance of convincing...

dyno's don't mean everything in the world you know... I guess that's hard for you to get over.

I'll say it again as I did originally, I was just interested in seeing if there was any REAL WORLD difference, not but dyno nor mental errors. I can't even tell you guys how many times we kept doing the same thing over and over and over just to ensure we were getting more accurate results. For those who want to claim a dyno is the only way to tell if a part is helping, get off the internet stop reading dyno claims and get out in your car and test for yourself. Finally, if you don't want to acknowledge our means of doing things great, but I was just doing what people had ASKED me to do after my first test was such 'randomness' as well. I'd love to see how many of you would do something like this on one of your few days off just to help people get an idea of what to expect from a product...

MEOW...haa haa haa...

Look...maybe on the planet you are from dyno's do not mean anything, but your fatal flaw is that this is "Earth"...any "Real World" difference will be clearly evident on a dyno...and that will put things into a form people could argue from...you know actual data...

What you are also failing to realize is that you could be biased and simply want for it to work so badly you are just making things up...your credability on the internet is not going to be taken at face value...

Finally, let it go on record that I also have the pulley...but just for the bling factor as its blue! wooo!! But that does not mean that I firmly believe that it works...Maybe the next dyno day I'll swap it in and out and post the results...at least we would have something tangible and "REAL" to argue from instead of getting your panties in a wad just because someone tells you to do a dyno...

Chill out dude...its the interweb...your gonna get a stroke at your rate...

:rolleyes:

Hahaha... how old are you, 12? You have to resort to name calling on the internet? Get over yourself. I'm not gonna bother coming down to your level.

WOW...I mean...WOW...I dont think I even called you a name at all...I cant possibly imagine how you got that...

Yeah...good job trying to maintain any credability and showing off your lack of reading comprehension...

Good Job!

"getting your panties in a wad just because someone tells you to do a dyno"

If that's not an insult I don't know what is.

Um...did you or did you not rant? It's simple..."getting your panties in a wad" is an expression for becoming upset...and not calling you a name...so you are still wrong in that regard and simply reaching to justify yourself...

Look...you flipped out because someone told you to do a dyno and went on a rant about how dynos are meaningless and do not apply to the "Real World"...

If you want to take offense to a figure of speech then be my guest...but it sounds like you got some serious anger issues dude...

Yeah high flow CAT not always a good thing.. sometimes a little back pressure goes a long way. This is kinda why i'm trying to figure what is the best exhaust pipe diameter before i run out and buy an exhaust, though i know improvements are usually minimal but i certainly don't want to spend money to make the car slower.. I had turbo'd intergra initially running a 2.25 - 2.5 pipe, then i switched out to a 3.0 straight pipe.. what a differnce. With a turbo application bigger pipe = WOW!..

2.5 for an NA is what I've read on here...3 if you go FI...

My whole contention is NOT that there is no power to gain at all - apparently you gained something in the order of 2 or 3 HP if you ignore the other variables that could account for this.
Rather, I don't feel the trade off is worth the risk/investment.

Well, this is something we'll have to see over time. Unsure if this will have a negative long term effect or not... we shall see.

The best and most credible results I've seen regarding NA exhaust systems are from TeamRX8 and Speedsource...both are using 3" diameter on factory ports (last I read). But with pcm control.

Interesting...Altho I think they are running different fuel maps...I know Team is running with the RB Racing flash so I think perhaps he is able to take advantage of the pipe? :dunno:

Yeah, this is why I said "with pcm control" but their results can't be argued with, and I doubt Speedsource used 3" diameter because it sounded cool.

Further, they may have taken more advantage of the larger diameter with the pcm work, but do you really think they are flowing that much more cfm from the exhaust ports? They're still NA engines.

Not trying to be argumentative, just more food for thought. For the most power NA, unported block, I'd personally try to follow TeamRX8's template.