Another E9x M3 World Record: 785 whp, 528 wtq

[Lrpe_m3]

[0-60Motorsports]

Thats amazing. Any vids?

[m3london]

Originally Posted by JRV

Those graphs are beautiful! This is such an inspiration for me. I am seriously contemplating once out of warranty to go the LC+mid level blower route. Maybe will have to hit you up sooner or later for local ******

My M3 was at American Racing Headers in Deer Park, NY with Sam's M3.
I did the long tube headers with hi-flow cats and resonators. With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

On a side note the car also gained 3mpg from the long tube headers installation as a benefit on top of the immensely improved engine response through the entire power band.
I'll put up pictures once I get a chance, but suffice to say this is one of the best performance mods you can ever do to the car, and when you do have a supercharger installed the long tube headers gains will be even more

[bmc335]

Damn dude!

[bmwMcrzy]

Originally Posted by m3london

I did the long tube headers with hi-flow cats and resonators. With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

Anyone know what the gains for just hi-flow cats + resonators are ?

[JRV]

Originally Posted by m3london

My M3 was at American Racing Headers in Deer Park, NY with Sam's M3.
I did the long tube headers with hi-flow cats and resonators. With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

On a side note the car also gained 3mpg from the long tube headers installation as a benefit on top of the immensely improved engine response through the entire power band.
I'll put up pictures once I get a chance, but suffice to say this is one of the best performance mods you can ever do to the car, and when you do have a supercharger installed the long tube headers gains will be even more

Wow did you do a before and after dyno?

[ZEEM3R]

You sir, are the king of M3s.

[sebaflex]

Originally Posted by m3london

My M3 was at American Racing Headers in Deer Park, NY with Sam's M3.
I did the long tube headers with hi-flow cats and resonators. With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

On a side note the car also gained 3mpg from the long tube headers installation as a benefit on top of the immensely improved engine response through the entire power band.
I'll put up pictures once I get a chance, but suffice to say this is one of the best performance mods you can ever do to the car, and when you do have a supercharger installed the long tube headers gains will be even more

You've got my attention... dyno sheets?

[Patrón]

Originally Posted by m3london

With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

[Tiz113]

Congrats Iz! You Deserve It!

[steven_s]

Originally Posted by sebaflex

You've got my attention... dyno sheets?

lol got everyone's attention...

[regular guy]

Originally Posted by m3london

I did the long tube headers with hi-flow cats and resonators. With no tune and stock 4.0L v8 the car produced 48-49 (avg from several pulls) more wheel hp over stock and +38 torque.

These results would contradict multiple header developments by multiple companies. RD Sport developed large diameter, short tube, standard diameter long tube tri-y, large diameter large tube tri-y, standard diameter long tube 4-1, and large diameter long tube 4-1 headers. Some configurations hurt power, and at best the gains were only a few (less than 5). Supersprint with a very large $$$ budget played with headers for S65 and gave up because there were no gains to be had. Dinan also spent months on header design and abandoned the effort because there were no gains to be had.

I don't doubt these headers will mildly help a supercharged application. But 50whp on NA with high flow cats just didn't happen. I recommend going to a local dynojet, maybe the one at P1 Motorcars. Get an independent dyno. If you really got 50whp, then it will be obvious by comparing your results to the ones in the s65 dyno database @ www.s65dynos.com. 50whp gain would easily put you at the top of the NA database and would be very obvious.

It's just not very likely that these companies with big budgets who spent months on development didn't find any gains and somebody else found 50 whp.

[Patrón]

from m3london's post, it seems he did a before and after. Perhaps it's just an outlier or their xpipe is producing more power in combination with the headers.

[m3london]

Originally Posted by bmwMcrzy

Anyone know what the gains for just hi-flow cats + resonators are ?

The gains with just a cat and resonator delete aren't that much (maybe 8-10 hp) because the factory shorty headers are so restrictive and there's nothing to smooth the exhaust pulses that yes it'll be louder but the car won't have the balls it should to back up all the noise it'll make.

[m3london]

Originally Posted by sebaflex

You've got my attention... dyno sheets?

If you contact American Racing Headers directly they can provide more information and my car was dyno'd at JTM Motorsports on a mustang dyno that usually reads a "lower" number than dyno-jet.

I'll post more pictures etc later on today cause I'm on my mobile app right now. but for more information contact:

American Racing Headers
880 Grand Blvd
Deer Park, NY 11729
631-608-1986
nick@americanracingheaders.com

But put it this way, for any doubters on the HP numbers remember these guys can make mustangs go fast, so bmw's are a little easier to work some magic on.

[m3london]

Originally Posted by JRV

Wow did you do a before and after dyno?

We did a before and after dyno and the guys are doing another run today with a triple-step headers and no cats to see what the car can produce. I'll put up a graph when it's all finished. But what I can say about SAMs supercharged m3 is his car was initially dyno'd with a cat less active Autowerke centersection and mufflers. My car was 100% stock before doing ARH's long tube header setup...which is why the number gains are more on my car.
I will add more info as I post up more stuff when I get home (iPhone app is a touch limited).

[Epoustouflant]

Originally Posted by regular guy

These results would contradict multiple header developments by multiple companies. RD Sport developed large diameter, short tube, standard diameter long tube tri-y, large diameter large tube tri-y, standard diameter long tube 4-1, and large diameter long tube 4-1 headers. Some configurations hurt power, and at best the gains were only a few (less than 5). Supersprint with a very large $$$ budget played with headers for S65 and gave up because there were no gains to be had. Dinan also spent months on header design and abandoned the effort because there were no gains to be had.

I don't doubt these headers will mildly help a supercharged application. But 50whp on NA with high flow cats just didn't happen. I recommend going to a local dynojet, maybe the one at P1 Motorcars. Get an independent dyno. If you really got 50whp, then it will be obvious by comparing your results to the ones in the s65 dyno database @ www.s65dynos.com. 50whp gain would easily put you at the top of the NA database and would be very obvious.

It's just not very likely that these companies with big budgets who spent months on development didn't find any gains and somebody else found 50 whp.

^This.

[regular guy]

Originally Posted by m3london

We did a before and after dyno and the guys are doing another run today with a triple-step headers and no cats to see what the car can produce. I'll put up a graph when it's all finished. But what I can say about SAMs supercharged m3 is his car was initially dyno'd with a cat less active Autowerke centersection and mufflers. My car was 100% stock before doing ARH's long tube header setup...which is why the number gains are more on my car.
I will add more info as I post up more stuff when I get home (iPhone app is a touch limited).

The stock headers are anything BUT restrictive. They are so good, that's why nobody can get any gains over them. Average stock M3 is 330 whp on a dynojet. Go hit a dynojet and show me 380whp without any other changes. Triple-step headers sounds like a Tri-Y design to me. Tri-Y header design on S65 produced a monster torque dip around 2500-3000 RPMs.

Here's a comparison of large diameter short tube headers and standard diameter long tube tri-y headers on the S65 with a 4.6L stroker motor. See that nasty torque dip on the tri-y headers?



Here's the same 4.6L motor design with factory headers. Same power as headers.


Here's a comparison of standard diameter long tube tri-y headers with standard diameter long tube 4-1 headers on the same 4.6L motor.



I'll say it again, 50whp gain just didn't happen. If it did, then Dinan, Supersprint, and RD Sport would be in the market already.

[Someone?]

This Guy^ knows his stuff as good as Anyone that deals in the M3 world, Believe him, I do, and like he said S65 been around for a long time and a lot of loot has been spent on trying to make a better header and No One Has done it, if someone did everyone would have um.

[Jinobee]

Originally Posted by RingMeister01

Yah bitch!!

Lmaooo the pic to funny

[IMG]

Originally Posted by M33too

High five!

Links are down, can't wait to see all the images

Fixed !

[IMG]

Originally Posted by MFL

My car gets so ass happy in some scenarios, I don't see how you guys do it without DOT street drag radials.

All depends on how you drive your car .

Originally Posted by r1762

Whoa congrats!

Thanks