[stillclaimndp]

Originally Posted by hl0m4n

if you look at rips dyno the 2nd one is with ss exhaust only, and for the magazine it shows two setups, one with connecting and x and then a complete which is what i have...

that's weird then...

[stillclaimndp]

Originally Posted by O-cha

Then why would you say an exhaust leak would help horsepower, but feel free to comment on any of my posts, in a PM because this is not the place for it. But I would love to hear what you have to say.

Also threatening people on the internet? Interesting.

^ yeah i threatened to not give you the benefit of the doubt going forward, i wonder if i can be arrested for that? I was making a point that this was not likely caused by a exhaust leak, if you think it is voice your opinion, don't belittle me.

[sdwilly]

Originally Posted by Terry335

If you want a louder car or better sound, it's worthwhile. If you prefer to keep the car quiet, I would not say the performance gains are worth the cost/hassle of it. Not to mention the potential warranty problems. Only if you want every last 10rwhp.

Interesting, thanks for the info.. More and more I keep leaning toward the Borla (seems to be the quietest of the bunch).

[sdwilly]

Originally Posted by hl0m4n

if you look at rips dyno the 2nd one is with ss exhaust only, and for the magazine it shows two setups, one with connecting and x and then a complete which is what i have...

Fill up with 89?

[hl0m4n]

Originally Posted by O-cha

Then why would you say an exhaust leak would help horsepower, but feel free to comment on any of my posts, in a PM because this is not the place for it. But I would love to hear what you have to say.

Also threatening people on the internet? Interesting.

guys can we please stay on topic , i really don't know what is going on...

[stillclaimndp]

Originally Posted by sdwilly

Interesting, thanks for the info.. More and more I keep leaning toward the Borla (seems to be the quietest of the bunch).

how much for the borla?

[O-cha]

Originally Posted by stillclaimndp

^ yeah i threatened to not give you the benefit of the doubt going forward, i wonder if i can be arrested for that? I was making a point that this was not likely caused by a exhaust leak, if you think it is voice your opinion, don't belittle me.

I'm sorry I guess I misunderstood you when you said;

Originally Posted by stillclaimndp

if anything an exhaust leak would probably make more power...

Clearly you were saying that it wasn't an exhaust leak and not that if anything an exhaust leak would probably make more power... how could I possibly have though this.

I'll make no more posts on the subject though as not to further derail the thread, you should do the same.

[stillclaimndp]

Originally Posted by hl0m4n

guys can we please stay on topic , i really don't know what is going on...

sorry about that, i think sdwilly has the most likely answer thus far "fill up on 89?"

[ArmyBimmerDude]

Originally Posted by hl0m4n

i found two dynos/reviews on the exhaust
1. http://www.e90post.com/forums/showth...persprint+dyno
2. http://www.e90post.com/forums/showth...persprint+dyno

seriously are 1hp? what can be the problem?

So based on that article, just the SS exhaust should give you 10 more rwhp and with DPs/SS exhaust you gain 20rwhp.

[hl0m4n]

Originally Posted by stillclaimndp

sorry about that, i think sdwilly has the most likely answer thus far "fill up on 89?"

93 octane

[stillclaimndp]

Originally Posted by O-cha

I'm sorry I guess I misunderstood you when you said;



Clearly you were saying that it wasn't an exhaust leak and not that if anything an exhaust leak would probably make more power... how could I possibly have though this.

I'll make no more posts on the subject though as not to further derail the thread, you should do the same.

you aren't listening, just talking, like always... i said argue your point, don't take a personal shot. which you continue to do

[stillclaimndp]

Originally Posted by hl0m4n

93 octane

maybe the 40-45% increase in humidity then... many people have run slower quarters on high humidity days like maxboost when his v2 only took off 1/10 of a second in the quarter vs 1.47

[sdwilly]

Originally Posted by hl0m4n

93 octane

As odd as it seems could there be something restricting the flow? An obstruction in the pipe? Don't know how that would be, but based on the previous dyno's I don't see how you would lose power either.

[sdwilly]

Originally Posted by stillclaimndp

how much for the borla?

Seems to go for about $1000, it's just a rear section though. If I remember correctly NPDAN had dropped his car off at Borla to get a fitting on the secondary cat delete pipe last week.

[Dan335i]

IMO the only way you will see worthwhile hp and trq numbers from a cat-back exhaust is if its used in conjunction with supporting mods.Like increased boost,tuned or upgraded ecu,full turbo back exhaust,meaning down pipes,etc. Otherwise your paying for a better exhaust note.Personally i love the stock exhaust sound.

[radgator1]

Something isn't right. There is no doubt that SS exhaust is much more free flowing than stock with includes a second set of cats and crimps and bends. I wouldn't be surprised if you got some less than stellar gas. I remember way back in the day when Shiv was doing the installs and dyno days there were a few cars that made really bad numbers compared to the rest and some of it was shown to be from poor quality gas. I think some were guys with Mobile and maybe arco and when they repeated the dynos with Shell they saw much better numbers.

You might try also try doing the before and after with an ecu mod. Pick up a JB2 and slap it on since that is the most bang for the buck out there Of course this is assuming you still have the stock exhaust and dont mind putting it back on to re-dyno. Since just about everyone who is going to buy this exhaust is also going to kick the boost up a bit, testing with a piggyback is going to be more real world anyway.

[hl0m4n]

something def isn't right. i mean 1whp? anyone else help please.

[sambonator]

I would reset your ECU as well, by disconnecting your battery for like 30 minutes.

[Rips335iCoupe]

I think there are too many variables here to determine what the issue is. You should have done this on the same day. Here is my dyno, done the same day. First a base line (everything stock) for my car was done, then exhaust put on, then dyno’d again. This is what the SS exhaust gives you on that day, on that dyno. I would expect about the same from your setup.

The first line is the base, the next one is with the Supersprint exhaust, the one following is the Turbo Tuner, and the final one is with the RPi intercooler.

[hl0m4n]

i never heard of disconnecting the battery for an exhaust. anyone else input on what can be wrong?

[stressdoc]

Weight loss may be the best benefit from mod exhaust with stock engine. Go titanium!

[T Bone]

hl0m4n, I am not sure how the other people derived 20whp (or whatever) for the exhaust only, so I think there is definitely some degree of level setting of expectations that we need to do.

For a NA car, I would expect 0-2 whp for a cat back exhaust for a BMW. For a turbo car, I would expect 2-5 whp with a stock BMW motor.

If we view your results in that light, the dyno runs are within normal variance for all dyno runs which means if you have the level set of a 2-5 whp gain, your exhaust is working properly.

SS exhausts are awesome quality so I would doubt it is a product issue - I think it is just the nature of the beast of having a stock motor. I would honestly try to dyno the car on a different day, perhaps with the engine running a bit cooler.

It is probably not what you want to hear but your exhaust system is awesome and will yield more benefit if you tune.

I know you want a dyno chart to validate your mod, don't let these set of charts bother you. Go in on a different day.

I would also ask your vendor about the methodology on how they derived the 20 whp number!

Good luck bro.