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      06-22-2019, 01:20 PM   #67
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Quote:
Originally Posted by tdott View Post
Got flamed on the fb group for this, was trying to get over the 70% hump:


One of the reasons I almost didn't bother posting this, but support on here has been great so far. Thank you all that have contributed.
What group was this posted on? Most of the facebook community consists of guys who own 335i and lower anyways who think they can gap M3's.
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      06-22-2019, 02:54 PM   #68
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Originally Posted by M3anest View Post
What group was this posted on? Most of the facebook community consists of guys who own 335i and lower anyways who think they can gap M3's.
This is the E9X M3 V8 Owners Club. Yea I wouldn't post in any of those 335 infested groups, would have been even worse.
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      06-22-2019, 02:55 PM   #69
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Quote:
Originally Posted by BigBoosting View Post
Those numbers seem odd, thats what a stock M3 puts down. Of course dyno to dyno comparisons aren't equal, but my car with your same mods made 380whp and 275tq as do most M3's with test pipes and a tune.

If you install the headers and then happen to make 380ish whp its going to look like the headers and x-pipe alone added 40 more hp. When in fact your "baseline" numbers are off for some reason.
Keep in mind the heat and humidity. IMO comparing peak numbers between dynos is worthless. Means nothing because there is too much variance. Before and After Deltas mean much more.
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      06-22-2019, 02:57 PM   #70
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Quote:
Originally Posted by Dave07997S View Post
tdott, what octane are you running?
93 Octane, but I'm pretty sure my tune is for 91 octane, i'd have to double check because I got the tune when living in Canada and 93 is not too popular as it is here in FL.

Last edited by tdott; 06-22-2019 at 05:02 PM..
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      06-22-2019, 05:25 PM   #71
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DYNO RESULTS ARE IN!!

I am happy to say these headers made power over the entire range and sound great in my opinion, it adds raw engine sounds and more motor noises without being insanely loud like a few setups I've heard. My goal is to have a Eisennman Race to replace the CNT racing one day:

+15whp / +8wtq in hotter conditions 96F vs 93F, same 40% humidity


Before & After Overlays:

STD:


SAE:


Notes on the install are on my blog, there were major issues with the length pbonsalb & SAMM3Y called it, the end of the end pipes were too long on one side and required cutting, pictures in part 2 link below:

ebay link: https://www.ebay.com/itm/232627578439

I am planning to have AA in Miami do a custom tune for me in the fall maybe.

Last edited by tdott; 06-22-2019 at 06:40 PM..
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      06-22-2019, 06:19 PM   #72
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Great Job as usual!

Quote:
Originally Posted by tdott View Post
DYNO RESULTS ARE IN!!

I am happy to say these headers made power over the entire range and sound great in my opinion, it adds raw engine sounds and more motor noises without being insanely loud like a few setups I've heard. My goal is to have a Eisennman Race to replace the CNT racing one day:

+15whp / +8wtq in hotter conditions 96F vs 93F, same 40% humidity


Before & After Overlays:

STD:


SAE:


Notes on the install are on my blog, there were major issues with the length pbonsalb & SAMM3Y called it, the end of the end pipes were too long on one side and required cutting, pictures in part 2 link below:

I am planning to have AA in Miami do a custom tune for me in the fall maybe.
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      06-22-2019, 07:25 PM   #73
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Well those results are fantastic! +15whp +8trq to the wheels plus the added sound! Great! I'd be very happy!.... now I want some!!
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      06-22-2019, 08:11 PM   #74
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So it’s +15 rwhp and +8 lbs rwtq from headers and midpipe over testpipes. The CNT rear exhaust was used with the testpipes and new system.

I’d guess a catless x-pipe would be worth 10 rwhp over test pipes and ~5 lbs rwtq.

Based on that, I’d say the headers and “larger” diameter piping midpipe are worth ~5-10 rwhp and maybe ~5 lbs rwtq over stock headers and the typical catless x-pipe.

Still worthwhile for someone chasing every gain or someone who is thinking about buying testpipes or an x-pipe. This outgains testpipes or a standard x-pipe for the price of a standard x-pipe.
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      06-22-2019, 08:50 PM   #75
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great job!!! If you are going to have aa custom tune it, please get baseline numbers so you can see the delta. Peak numbers are awesome, but the midrange is where you will feel the most difference. I thing a custom tune for 93oct will also wake the car up.
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      06-22-2019, 08:54 PM   #76
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Quote:
Originally Posted by pbonsalb View Post
This outgains testpipes or a standard x-pipe for the price of a standard x-pipe.
This is key and the reason I wanted to try these, I had stock mid section with test pipes and wanted to try a catless xpipe setup and those were not much cheaper than this setup, they also didn't have the xpipe design where it is further up like i wanted, only the hard to find MRF or Gintani xpipes have the x further up i think and those are usually pricey when you find one used.

I would also say that with the headers, the potential is greater if a tune is done to take advantage of the headers. Others have proved that a custom tune for the headers can make more power over an off the shelf tune.

Last edited by tdott; 06-22-2019 at 09:29 PM..
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      06-22-2019, 08:57 PM   #77
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Quote:
Originally Posted by Camnyc View Post
great job!!! If you are going to have aa custom tune it, please get baseline numbers so you can see the delta. Peak numbers are awesome, but the midrange is where you will feel the most difference. I thing a custom tune for 93oct will also wake the car up.
I agree, I am hoping when AA does the custom dyno and they can do it on their dyno and provide before and after. I will not pay again to do more dynos. Yes 93 for sure, I would consider E85 but i don't think AA plays with that. I also dont want to be stuck with E85 only.
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      06-23-2019, 08:43 AM   #78
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Just read through the blog, nice work. Looking at the ebay link when they line up all the pipes 1 side is clearly shorter than the other. I wonder if all of them turn out like that or it was just a packaging fluke.

Great power gains for the price. For totally stock exhaust guys who don't care about being catless, putting $300-400 into test pipes instead of $975~ for all this becomes are harder pill to swallow.


The ultimate comparison now would be these headers vs the name brands on the same car/dyno. Doubt that will ever happen though.
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      06-23-2019, 09:37 AM   #79
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Quote:
Originally Posted by tdott View Post
I agree, I am hoping when AA does the custom dyno and they can do it on their dyno and provide before and after. I will not pay again to do more dynos. Yes 93 for sure, I would consider E85 but i don't think AA plays with that. I also dont want to be stuck with E85 only.
Also, when is the last time you changed spark plugs and o2 sensors?
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      06-23-2019, 09:50 AM   #80
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Quote:
Originally Posted by Camnyc View Post
Also, when is the last time you changed spark plugs and o2 sensors?
Plugs were done 3yrs ago, about 10k miles. I'm planning to do them again soon.

O2 sensors have never been changed. (That I know of)
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      06-23-2019, 09:51 AM   #81
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Quote:
Originally Posted by 8500RPM View Post
Just read through the blog, nice work. Looking at the ebay link when they line up all the pipes 1 side is clearly shorter than the other. I wonder if all of them turn out like that or it was just a packaging fluke.

Great power gains for the price. For totally stock exhaust guys who don't care about being catless, putting $300-400 into test pipes instead of $975~ for all this becomes are harder pill to swallow.


The ultimate comparison now would be these headers vs the name brands on the same car/dyno. Doubt that will ever happen though.
Thanks, I agree. The down side for most would be the install. The labor to install would probably be similar to a rod bearing job.
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      06-23-2019, 11:26 AM   #82
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Would there be the possibility to mount the Becker headers togheter to an akra evo exhaust line? It could be a good combo
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      06-23-2019, 11:50 AM   #83
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Once again this is inline what others have gotten. A catted header system is probably 10rwhp stronger than just a test pipe with rear cats still in place. The good news is if you look at the dyno it gains that 10-15rwhp from 4500rpm and up, not just peak horsepower.

I never doubted this, the issues is removing the headers every smog test will become quite a chore. The test pipes are really the best of both worlds. If I had a lift I would consider it to swapping it out every 2 years.

BTW bro, beautiful car!!

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      06-23-2019, 12:52 PM   #84
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Nice gains for the price, I wonder how much it would help on a supercharged motor.
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      06-23-2019, 01:25 PM   #85
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Quote:
Originally Posted by BigBoosting View Post
Those numbers seem odd, thats what a stock M3 puts down. Of course dyno to dyno comparisons aren't equal, but my car with your same mods made 380whp and 275tq as do most M3's with test pipes and a tune.

If you install the headers and then happen to make 380ish whp its going to look like the headers and x-pipe alone added 40 more hp. When in fact your "baseline" numbers are off for some reason.
Absolute number comparison are 100% meaningless. All that matters is the delta after after controlling for variables.

Quote:
Originally Posted by SAMM3Y View Post
Well those results are fantastic! +15whp +8trq to the wheels plus the added sound! Great! I'd be very happy!.... now I want some!!
100% agree! Solid gains for sure, even after accounting for the removal of the secondary cats. If one had a lift, this would be a great mod if not for the sound alone.
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      06-23-2019, 02:03 PM   #86
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Hmmm, you're tempting to sell my IPE F1 mid section and pick up a set of these...


How secure do you feel the copper nuts are on there? I noticed the OEM designs has a sort of "countersunk" surface due to the design of the header flanges whereas this design is a flat plate. Do the header mounting studs on the block protrude enough to get a secure fit with the copper nuts?

Thanks for doing all of this btw!
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      06-23-2019, 03:29 PM   #87
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you do not need a lift to put these headers on.
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      06-23-2019, 03:52 PM   #88
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Quote:
Originally Posted by darkbmw View Post
you do not need a lift to put these headers on.
I understand, but it sure makes it a lot easier
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