Since my thread "Any Truth to This" has mysteriously disappeared, i will bring it back.
The Magnaflow is said to add a minimum of 10 hp. But with pulley being on, then adding the magnaflow it was dyno tested and only added 5 hp.

Randy seemed to disagree with this. Stating that with the alta intake and magnaflow exhaust gave about 17 hp and adding pulley gave an extra 16hp on top of that.

Some have also said that the magnaflow was one of the least effective with the pulley and that the Borla Sport would be a better option.

Can we get to the bottom of this please. Tnanks in advance for your replies.

 

I have thought the same thing, and we need to keep this in the 5 recent topics list, until we get a good firm answer.

 

I don't want to hijack your thread, but does anyone know about the Scorpion exhaust. I think I saw a thread on MINI2 stating that it was "super" at flow through. (I can't find it now) Davebret's, comments about the Borla "race" have got me wondering also. I do not know how or if we can get a real answer to these questions. It seems everyone has their opinion, but who knows for sure?

_________________
Bradley

 

I would like to see some pics, and some HP numbers on the scorpion. I haven't seen anything on it yet, but have heard that it is really good.

 

It's not an opinion its facts. Based on Dyno testing. We will know the truth, just a matter of time

 

^Hopefully sooner then later.

 

apparently not sooner...damn it

 

What DID happen to that thread? I'll repost my dyno run comparing pulley/chip to pulley/chip/magnaflow:

 

Only 5 hp from the Magnaflow (with pully) might seem like small improvment, but what do any of the others do when a pully is added?

I've had the Magnaflow on for a while, and will have the pully done soon. I'll be quite happy to keep 5 of the 10+ hp I gained back when I got the Magnaflow.

 

i don't hv a magnaflow but i do have a pulley & exhaust and i'd like to share some of my experience with these mods.

from stock car to pulley & ecu, huge diff.

then when i get the supersprint exhaust (without center pipe), not much diff. i'd say but the exhaust note changed dramtically.

then i had the header & race pipe (center pipe) installed to my already ecu & pulley'd car.......huge diff. again....

my point is that if you're to get the pulley & ecu mod in the near future, the hp gain from a single item is not important anymore as long as you hv the complete setup....i think borla, mag or supersprint or quicksilver will all do their job and the diff. won't be that noticeable anywayz.......just pick the ones that you think you like the best.....forget about the hp gain numbers.

 

I'm still waiting for information that copares the merits of the Magnaflow versus the new Borla Sports exhaust. I recall someone connenting that the Magnaflow is potentially more restrictive wiht highly modded cars but I have not seen any numbers that back that up or at least show that there is something better out there.

Randy, can you clear this up?

Thanks,
Jim

 

thus the reason for my post.

 

I wonder who deleted the other post, and why?

 

my 2c from a layperson perspective:

free-flow exhaust enhances breathing or engine airflow.
pulley enhances air flow.
other mods may also enhance airflow.

Regarding measuring each components effect on dyno: first of all, dyno runs may vary a lot, based on athmospheric conditions, airflow through intercooler etc..
Since the differences you are talking about are so small (a 2 hp difference at about 200hp is 1%), you could only truly state something about such changes when you did many runs and a statistical analysis that takes into account variability between runs.

That aside, I would expect a different effect based on other mods:
at some point, you can only increase engine breathing through mods by so much, and other factors will have a greater effect on restricting breathing (valves, ports, header, etc...).

What is really restrictive? You could converesely argue that the pulley mod yields, say 18 hp with a given engine config and test config, but when you go from stock to a, say Borla exhaust, the pulley will only yield an extra 15 hp.

If you add up all individual mods and their hp gains, you could theoretically fab an engine with 250 hp, but put all of the mods on one engine and you may find only half the gain.

So, bottom line may be that some mods work better with others, than other mods, and that is one of the two issues here. The othe rissue may simply be that the more mods you add, the less each will add to the hp compared to what tha mod alone would do on a stock engine.

I think. ???

 

yes ofcourse, but what i am trying to find out is whether or not the magnaflow is still the best course of action with excessive modding like pulley, ecu, intake, throttle body, headers, etc. Thanks for your replys. We need to keep digging though.

I am getting too close now.....maybe thats why the last thread mysteriously disappeared.....hmmmmmm HAHAHa

 

>>yes ofcourse, but what i am trying to find out is whether or not the magnaflow is still the best course of action with excessive modding like pulley, ecu, intake, throttle body, headers, etc. Thanks for your replys. We need to keep digging though.
>>
>>I am getting too close now.....maybe thats why the last thread mysteriously disappeared.....hmmmmmm HAHAHa

It would suck big time if the Magnaflow was not the best option for a fully modded car, I got mine based on Randy's testing and the results posted here. Now I want to know as much as you do, if the Borla sport or Magnaflow is the way to go.

X2

 

where does the quicksilver fall in this discussion?

 

Here's what I think I will do and also my 2cents worth. I currently have the Magna and Madness intake, I got from Randy. I will stop at this for now for the following reasons.

1. Wait for glitches in the stock mechanicals to be worked out.
2. Wait for more items and info to come to market.
3. I like the car a lot and when the time comes I will actually have the whole engine and tranny rebuilt with high performance parts so that I can have what ever hp I can get. Of course money permitting, but that is what I'm set on.
4. The little gains that the exhaust and intake gives right now is good enough for me.

Well again, this is me. What you do is up to you.


Peter

 

For past thread on the Borla sports exhaust see
https://www.northamericanmotoring.co...ic=9569&11
AND see this
https://www.northamericanmotoring.co...pic=9885&9
Pay attention to what Davbret posted on information about the combination of high power perf mods on the MCS and which exhaust worked best to allow freeflow of exhaust.
Hartmut at RENNtech mentioned about excessive backpressure being a problem with quicksilver with the full heavy mods and for magnaflow the problem is with intersecting pipes and restriction of high rates of air flow. Apparently the straight through design of the Borla sports tested best (testing by RENNtech). How much I don't know.
Hope this helps.

 

hello all,,,
the exhaust debate continues to go forth

just an observation....
where does the JCWorks exhuast fit into this picture?????
the general consensus seems to be that the JCW package is truly expensive, but i'm sure it was manufactured and tested w/ the all the mods y'all are touting..ie the chip, pulley, head...etc.

wouldn't this JCWorks exhaust possibly be the best match if added to existing mods.??????
i'm sure the price is similar to the qs or borla????
my dealer stated that it would be sold separately...

just food for thought

peace,
d

 

i guess we'll never know.......

 

About the only thing I've noticed now that I am driving
a car without the Magnaflow and the stock exhaust is that
I can hear the radio now.....
The pulley seems to have improved low end pull though. I
am sticking with stock for a while.

 

>>About the only thing I've noticed now that I am driving
>>a car without the Magnaflow and the stock exhaust is that
>>I can hear the radio now.....
>>The pulley seems to have improved low end pull though. I
>>am sticking with stock for a while.

2minis
no more Magnaflow?
why?
cause of the pulley change?
or just too old?

 

>>hello all,,,
>>the exhaust debate continues to go forth
>>
>>just an observation....
>>where does the JCWorks exhuast fit into this picture?????
>>the general consensus seems to be that the JCW package is truly expensive, but i'm sure it was manufactured and tested w/ the all the mods y'all are touting..ie the chip, pulley, head...etc.
>>
>>wouldn't this JCWorks exhaust possibly be the best match if added to existing mods.??????
>>i'm sure the price is similar to the qs or borla????
>>my dealer stated that it would be sold separately...
>>
>>just food for thought
>>
>>peace,
>>d
>>
>>

I doubt that the JCW exhaust is anything good. They need to be relaxed with the design because of things like CA noise regulations and such. You can tell, just take a look at the size of the mufflers on an installed car. They hang down enough to see them. Yuck.

 

See this is what i was talking about. Still no definitive answers. I think eventually taking the battery box and moving it out of the way is going to be the best way to go. Then you can have an exhaust going straight back.