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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Oct-31-2017, 12:40:16 AM   #1
95bullet
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Default American racing headers Results

Decided to start a new thread to document the install the AR headers I got for my m3. To start I have an 2001 E46 M3 with ~110k miles on it. Was all stock minus a dinan muffler.

After ARH released their new header design I decided to give them a shot and ordered a set.

Now installing these headers turned out to be a little bit of a pita. I had ordered the e36 studs because I had planned to do ebay headers on my car. This made it was impossible to get a socket on some of the nuts. I had to cut down a wrench to get to a couple of the nutss. If you get these headers do yourself a favor and resuse/order stock e46 m3 studs. Now the other issue was the vanos line. Because these headers have a solid flange you have to remove the high pressure vanos line. No big deal. Well the issue was putting it back on after bolting up the headers. I had to bend the line slightly to slide it into place then bend it back to its original position. This can be avoided by sliding it in at the same time as the headers when installing them.



Now tuning. I tune my car myself. I learned how to tune using the information on the coding section of this forum. HUGE shout out to SliM3, p0lar, paffy and others who helped develop tools and knowledge of/for the mss54. Couldn't have done it without these guys. Please don't contact me about tuning your car I just do my own.

Now onto the dyno's

First my cars specs

2001 M3
Dinan muffler
Ar Headers and Section 1
EVERYTHING else is stock

The first line is the cars baseline. Second line is the car with a 5 minute shits and giggles tune with stock headers. Third line is the AR headers with a completely stock tune. Fourth line is the AR headers with my tune. Fifth line is the AR Headers with the air filter removed.




As you can see I gained 50RWHP SAE over baseline on the same dyno! I feel there is more left on the table too. I am not a professional tuner so I'm sure someone else could definitely make a few more hp. I decided to pull the filter out and it picked up a crazy amount of power. The stock intake was really restricting power. I have a Air box which has a different trumpet design waiting to go on that should remedy that issue and give me that power and more all the time. I also plan on doing tms pulleys and a custom 3.5" exhaust. I think I can easily hit 340 REAL NO BS RWHP with this car. Super happy with how the headers preform though. That is all thanks.

Last edited by 95bullet; Tue, Oct-30-2018 at 09:27:29 PM.
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Old Tue, Oct-31-2017, 12:54:52 AM   #2
FK
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Default Re: American racing headers Results

Finally.

I proper documented before and after thread.
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Old Tue, Oct-31-2017, 12:56:06 AM   #3
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Default Re: American racing headers Results

Great results. Thanks for sharing!
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Old Tue, Oct-31-2017, 01:03:38 AM   #4
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Default Re: American racing headers Results

Andddd I'm about to post my results with these headers... lol Waiting on the dyno graphs.

Nice gains! I had no problem using the standard studs.

These produced more torque and hp than I thought they were going to.
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Old Tue, Oct-31-2017, 01:34:57 AM   #5
kippers4brkfast
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Default Re: American racing headers Results

Nice numbers, thanks for sharing.
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Old Tue, Oct-31-2017, 01:53:26 AM   #6
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Default Re: American racing headers Results

Torque?
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Old Tue, Oct-31-2017, 01:55:48 AM   #7
robgill
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Default Re: American racing headers Results

Welcome to the club
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Old Tue, Oct-31-2017, 02:06:06 AM   #8
terraphantm
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Default Re: American racing headers Results

Quote:
Originally Posted by SQ13 View Post
Torque?
You can guesstimate based on the power @ 5250 since power and torque cross there. Looks like he went from 230ish@5250 stock to 245 after, and the gains look larger at the top end. Looks like he has a lot of room to improve his tune down low though since the headers with no tune at low RPMs made more power/torque than the headers with a tune at the same RPMs.
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Old Tue, Oct-31-2017, 02:10:38 AM   #9
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Default Re: American racing headers Results

whoa! thanks for sharing
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Old Tue, Oct-31-2017, 02:12:05 AM   #10
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Default Re: American racing headers Results

Quote:
Originally Posted by terraphantm View Post
You can guesstimate based on the power @ 5250 since power and torque cross there. Looks like he went from 230ish@5250 stock to 245 after, and the gains look larger at the top end. Looks like he has a lot of room to improve his tune down low though since the headers with no tune at low RPMs made more power/torque than the headers with a tune at the same RPMs.
Yeah its running extremely rich down low. Didn't want to waste dyno time dialing that in when I can do it on the street. Here's a graph with torque.

Last edited by 95bullet; Tue, Oct-31-2017 at 02:18:22 AM.
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Discussing American racing headers Results in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)