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      01-20-2013, 07:56 AM   #133
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Quote:
Originally Posted by flinchy View Post
ummm


that thread is to do with testin POORLY DESIGNED headers... if you read the whole thing.

look at other tests, they show that headers are a major improvement, especially with forced induction.
The Google search you linked to turns up one or two companies making anything approaching decent headers and a lot of promises that weren't kept. Fact is the S65's stock headers leave very little room for improvement without significant added cost as others have mentioned. Sure you can buy plenty of aftermarket headers that actually decrease overall performance and use lesser quality materials; nothing new here.

And you are dead wrong about engine harmonics; so that's 2/2 for you. It might be time for you to stop dumping on a photo thread if you're not only going to be wrong but be antagonistic at the same time.
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      01-21-2013, 03:07 PM   #134
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so that's what has been making all that noise
LOL
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      01-21-2013, 07:33 PM   #135
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Quote:
Originally Posted by flinchy View Post
ummm


that thread is to do with testin POORLY DESIGNED headers... if you read the whole thing.

look at other tests, they show that headers are a major improvement, especially with forced induction.
Headers historically produce big power for 2 reasons

1-OE was a simple manifold/dump system
2-headers (or manifold even worse) had primary cats built in

Either scenario replacing these by a tuned set of regular headers would yield big gains.

Taking a set of OEM headers with no cats leaves no room to be gained on the stock engine. Add 150hp then I am sure there is room for improvement.
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      01-22-2013, 03:41 PM   #136
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Number one reason why I bought my M3. Yup, just to hear this sweet engine. And you know what, I 'm loving every minute of it.
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      01-29-2013, 07:06 AM   #137
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Wow that just took me back to 2003 when.... had my E46 M3. I had those pics on my computer. That engine is a true work of art!
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      01-05-2017, 07:18 AM   #138
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Originally Posted by Amri215 View Post
Anyone else feel like this thread needs a bump?
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      01-09-2017, 12:06 AM   #139
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kinda makes me sad.
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      01-09-2017, 01:34 PM   #140
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Quote:
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kinda makes me sad.
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      01-13-2017, 11:37 AM   #141
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my head is telling me m4 turbo but my heart and ears tell me to keep my s65. what sparked my love for the car was hearing it in person with the numerous of vehicles racing at Circuit of the Americas. the muffled turbo cars are fast but really don't spark any love.
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      03-27-2019, 09:31 PM   #142
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Quote:
Originally Posted by Munit View Post
You guys, this is the absolute epitomy of a modern day NA engine. From the breathing intake side you have an absolutely perfectly engineered intake path of force fed air with both ram features and cold-air features with no MAf and a big MAP sensor able to deal with large amounts and variances of volumes of air. Then you have a smooth wide open intake manifold path with perfectly spaced and sized intake trumpets leading to 8 ITB-an entire intake pack into the cylinders that has no weak spots or points of suffocation or limited air movement. You have the most efficient high compression ratio cylinder/piston setup making the very most out of each compression stroke and then you have the exhaust breathing out some of the best made headers that rival absolutely aNY aftermarket maker and is better than all aftermarket makers and these are oem.

Essentially you have zero weak spots in engine breathing and exhilation, especially when you put high flow cats or catless-the exhaust piping after the catless/HFc is so straight back with virtually no curves or bends the entire 'air pump" of this engine is just absolutely efficient.

The parasitic losses minimized with disconnected alternator and A/C on acceleration, variable output oill pump based on need and super light engine parts to decrease rotating mass and thus preserve parastic losses.

This machine then produces the finest looking power/torque graph out there, no matter what car you look at. Look at ferrari 360 or 430. NOWHERE near as nice of a curve with a flat torque line spanning 6k rpms and a dead straight linear power curve peaking at 8400 and still climbing if more rpms were given.

WIth the only restriction is regular air filter which can be replaced with a drop in aftermarket and the cats which can be removed with high flow cats/catless, and making sure you add enough octane to let it hit its lofty timing targets by using 94 octane or so, you have an engine in this form of 4 litres putting out 450 hp with thos minor breathing changes, cat delete and air filter change.

The advance knock system means it can ride the knock sensor so closely to always maximize the best timing and come as close to hitting max timing targets much more conssitently than a traditional knock sensor which is far less accurate.

Guys this engine is probably pound for pound the best engine ever made from a purely technological/engineering feat and excercise in making an ideal lightweight high revving v8.

I upped redline to 8700, upped timing targets a bit with Ess tune and a naturally aspirated 450 crank hp motor in a 3600 pound car is just a recipe for a huge win-Nothing will ever ever come close to the aural visceral feeling this car delivers. I promise you with each new generation,e videnced by the new m5/6, refinement takes over and those who have loved traditional M cars will realize a huge part of what makes getting into the M every day, is the raw feeling knowing the engineers built us a race bred monster engine inspiried by true racing pedgree-and now that is special.

SO many cars out performs this on a numbers game with forced inejction but pound for pound in NA form-few come close. Its easy to make big power but there is an art to doing it in such a way where the engine sings a song to you, has a certain feeling and creates an entire experience each time you drive that a regular brute turbo motor simply lacks and will never have.
This reads like pages from Erotica
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