That's strange, considering that 0-60 magazine only threw down $1,600 for the Greddy exhaust -(source winter 0-60)

 

I'm not sold on those numbers but time will tell. I only gained 22 hp on my WRX STI with a complete helix/invidia turboback exhaust, and aspirated cars typically gain more over non-aspirated cars when it comes to exhausts and decreased back pressure.

 

remember this is a V8 with restrictive stock exhaust and we did 12 runs on the dyno to get the best average numbers...but if your not sold...can't do much to convince yah...lol

 

What does this mean? It makes no sense.

 

You're dealing with forced induction vs. naturally apsirated and 4 less cylinders in a boxter 4 where a freeflowing exhaust is crucial. Two different beasts. 25 rwhp is huge, especially on something that is tuned to maximum parameters from the factory.

 

This is seriously overstating what the factories do. No manufacturer short of Lotus tunes for best power at WOT. They all tune over-rich for safety and to reduce warranty claims. There is EASILY 5% missing in any Scion/Toyota/Lexus factory tune, so fixing the AFR will net quite a bit of power with no other changes. The risk is, if anything goes wrong - bad fuel, dirty injector, partially clogged fuel filter, etc., you will likely lose your engine because the one cylinder running lean will run REALLY lean and blow up. With the factory tune, you can suffer through some issues and still have a running engine with a MIL and a CEL identifying a problem instead of a MIL, CEL, and cracked head or block.

Saying any OEM tunes to "maximum parameters from the factory" isn't very accurate.

 

There's a phone number listed, if you don't believe it, call it.

Lou

 

Like I said, turbocharged cars regardless of size typically respond better to aftermarket exhausts from my experience. I gained 22-25 hp in my STI (and 70 ft lbs. of torque when tuned with ECUTEK and installed by I-speed in So Cal) and only 12 peak HP on my REVO tuned B7 Audi S4 with a complete Milltek (resonated) exhaust. I know all cars are different, just going by my experience with my past cars. 25 seems like a lot in my opinion especially without a tune. I personally wouldn't throw down that kind of coin again for an exhaust that will in my opinion be lucky to gain 10 hp and only saves six pounds from OEM. Not trying to attack anyone or Joe Z, just giving my opinion and experience so please refrain from attacking me and warning me about not being a team player because I disagree with respected CL members and vendors.

 

Psh...with all due respect I think the real issue is being missed here...

Why dont OEM's polish the exhausts!?

Seriously looking at how much better the Joe Z exhaust looks it makes the OEM unit look...well just not look good. I know its a great exhaust but look how much cooler the Joe Z unit looks under there!

On a premium car such as the IS-F wouldn't it be worth it as an extra selling point to communicate to the particular enthusiasts like us that they are going that little extra step?

I think Lexus should look at Joe Z's exhaust for inspiration.

 

8speed

^^ Jesus... "my, my, my, my, my, my, my, my"
Your Opinion is based on nothing regarding the IS-F.

We never claimed 25 rwhp..
This thread is about the install & pics !!!

Please refrain from posting in here..

Do NOT hit this button...


Joe Z

 

Um, I never said I didn't believe it.....if you read my response again I stated that it was "strange".

Thanks though

 

we get the idea.

i don't think flipside was trying to attack you; he was pointing something out that you might have overlooked. let's not get too worked up over different opinions.

to refernce crazyMPG's post:

if an average increase of 25 whp from 12 dyno runs isn't enough evidence, then i wonder what else is?

word.

 

Sorry for the insinuation BTW, is this the GReddy exhaust and tips everyone is talking about? If it is, the tips don't look so special to me.

http://www.youtube.com/watch?v=wm0z3ABhKAg

Lou

 

So I guess from now on I will just have to take vendors word that the gains they are promising are the gains we should expect and that the consumer shouldn't question and error on the side of caution. Take the SRT intake for example that claims over 20 RWHP, or Milltek exhaust that claims over 30 hp (only gained 12 in my Audi S4). Some owners in here actually reported losses from the SRT intake I can list numerous examples of people getting hung out to dry by erroneous performance gains just to sell a product.....so forgive me for being criticial!

 

This was posted before, I still like the sound of this exhaust. Low, nasty with a heart beat, when you jump on the accelerator, almost a Ferrari scream....."get out of my way".

http://www.youtube.com/watch?v=B85k_E90OZY&NR=1