No one is saying Randy is a liar or anything by any means. But for whatever the reason, the dyno results he gets are much higher than the dynos we see here on the East Coast. It very well may be just that they are different dynos. But over our way we see exhausts making about 5, intakes making anywhere from ZERO to THREE horsepower and all of the current exhaust header making NADA! That's where Andy's statement above came from.

 

<<Why would anybody ever buy a magnaflow exhaust?>>
It's a personal choice.....as all of this aftermarket equiptment is...

I bought one.... and sold it . It was toooooo loud 4me and droned, but.... felt like (w/ no actual dyno testing) it produced more power.

Other people here... rave about it and wouldn't trade it...ever!!!!!

If it does what YOU PERSONALLY want it to do ... then....it's a good choice for YOU!!!!!!

Peace,
D

 

>>No one is saying Randy is a liar or anything by any means. But for whatever the reason, the dyno results he gets are much higher than the dynos we see here on the East Coast. It very well may be just that they are different dynos. But over our way we see exhausts making about 5, intakes making anywhere from ZERO to THREE horsepower and all of the current exhaust header making NADA! That's where Andy's statement above came from. :smile:

 

FWIW, European Car and Techtonics each got little to no gain from the Magnaflow system. Randy's claim seems to be the outlier in the data set.

 

>>FWIW, European Car and Techtonics each got little to no gain from the Magnaflow system. Randy's claim seems to be the outlier in the data set.

So what seems to be the norm from MANY sources is: about 5 hp gain from the magnaflow. Now we hear the the European Car mag. says "little to no gain from the Magnaflow system" Who is right??? Who is wrong??? It seems to be common knowledge that on most any car, a free flow exhaust will make more hp. How much can depend on other mods ie; Intake, high flow injectors or bigger carb, etc. Agree???
OK, how can European Car say"No gain"???

 

The Ss stock exhaust actually isn't too bad at all. It appears to have mandrel bends throughout, the only place you could actually free-up hp is in the mufflers. I believe the Magnaflows are a straight-through design compared to the stock setup with is pretty heavily baffled.

 

>><<Why would anybody ever buy a magnaflow exhaust?>>
>>It's a personal choice.....as all of this aftermarket equiptment is...
>>
>>I bought one.... and sold it . It was toooooo loud 4me and droned, but.... felt like (w/ no actual dyno testing) it produced more power.
>>
>>Other people here... rave about it and wouldn't trade it...ever!!!!!
>>
>>If it does what YOU PERSONALLY want it to do ... then....it's a good choice for YOU!!!!!!
>>
>>Peace,
>>D

Thanks Dennis. I'm still lovin' it.

 

apexer wrote:

Read the article for yourself:

http://www.europeancarweb.com/projec...8ec_proj5mini/

:???:

Do a search for "Magnaflow dyno" by RandyBMC. It's interesting to see how his claimed numbers went down over time, while the Magnaflow exhaust design has remained identical.
_________________

1/4 Mile Database

 

Basically looking at that graph and the graph of other exhaust systems, I am beginning to see nearly no gain in the exhaust. A 4hp peak gain within a 250 rpm rev range is inconsequential and could even be related to some fluctuation.

I think a lot of the butt dyno's that everyone is talking about is really an association with sound and it's perceived feel of power. Most magazines show very little power gains from aftermarket exhausts on a wide range of cars. Most times the gains are from full exhaust systems that replace the catalytic converter.

With that said, I would really like to see the effect of Mandrel bends. My guess is that no one will see much difference between a normally bent tube and a mandrel bent tube.

I think the only real basis for getting an exhaust is for sound, looks, and it's warranty.

 

Andy,

I have to dismiss this article's results because they said:

"We were concerned, though, that on every pull the car seemed to hesitate slightly from 6400 to 6800 rpm. On the graphs it was evident the stock ECU pulled back some timing due to possible detonation on the pump gas "

I'd expect the top-end to be where a freeflowing exhaust would yield the greatest results, so their test vehicle isn't capable of showing the true gains of a different exhaust.

That being said, I doubt the 10-15 hp figures as well. I believe the dyno chart of your car is the only independent one I've seen and your gain of 5 whp in the upper rpm's is reasonable in my mind.