the_indian_kid

The wait is over, finally; Modern Horse Power (American Racing Headers) installed on the C63 Coupe 507. Has a catless setup, retaining the stock resonator and mufflers. Re-tuned with the Eurocharged ECU tune. Videos just don't do justice..real life is always better, of course. 2 links to the exhaust clips. Enjoy.

P.S. Thought some of you may get a kick outta the picture..

Magno507

sounds so good!! lol at first video .. bloke almost shat himself

Ihopaz

Sounds Awesome! Any dyno numbers????

the_indian_kid

Thanks guys. No dyno #s yet, crossing my fingers for Sunday at Eurocharged. She pulls quite hard, pretty noticeable until you get used to it haha.

Ihopaz

Yeah keep us posted, this is the last N/A mod next with out doing heads and cam on this AMG.

Curious to see how they measure up to some other brands claims, especially since I have eurocharged tune also.

For the videos were you in C or one of the other modes?

the_indian_kid

Will try to keep up with my own threads; pretty bad for doing so. I was in M mode with complete ESP off I believe. Such a slide show I tell you.

Ihopaz

I have second cat and resonator delete now with straight pipes to an x pipe and I thought mine was loud compared to most aftermarket exhaust systems and sounded mean. But holy sh*t man that thing sounded crazy! Did you ever do a before dyno?

the_indian_kid

It's honestly the way I want it. It is not loud under normal accelerations, moment you gun it, the angels are being awakened. I never did a dyno on the car. However from social media posts, the 507 with the EC tune, I believe pushed 448 WHP. I'm hoping to be well shy of 500 WHP.

Ihopaz

You think WELL? I would hope just shy of. What do they claim as the RWHP added?

the_indian_kid

I suppose I worded it wrong..woops. But according to the website with their ECU tune (MHP):

"110-115rwhp/70-75rwtq SAE gains on U.S. 93/98 RON when paired with our matched v3 CDT"

Ihopaz

Here is the reason I say this and I could be totally wrong but I was told by eurocharged like on my P31 and they said just like a 507 the tune would still only give us about 540hp. So if those guys are seeing those numbers I think most companies I was seeing I thought would expect 40rwhp out of their long tube headers that you should be at the 500 mark or really close!

BLKROKT

FYI those hp gain estimates are measured from a base C63, not a P31 or 507.

INS1GNIA

The guy in the first video was completely unprepared lol.

Ihopaz

But what I'm saying is Eurocharged told me there would be no difference on a P31 or a 507 as the extra hp is basically a little warrantied tune from the factory. And when we tune our P31 or 507 it erases that extra power it does not at the extra 90 or so over.

Kriston

Realistically you will be between 460-480 WHP. Which is on par with most with headers.

WESLEY KAY

Awesome! I just threw MBH headers on my white 507 coupe. They are insane!! I hooked it up with the Eurocharged V5 tune. I'm curious what your numbers will be. Subscribed!

Ihopaz

Man, I just love the sound of this, it sounds like a rapped ape! My two neighbors are both stuck up Porsche dbags, so this will go great with the new Viper I already modified loud as sh*t too.

Magno507

Do long tube headers change the exhaust note dramatically ?

the_indian_kid

Magno507, yes it does. It sounds amazing, had few bikers and lot of random people off the streets complimenting the exhaust note.

Bazman

Based on my 507 with headers and tune you should be around 485rwhp. No way will you be at 500rwhp+ unless the dyno is really friendly. 500rw will take heads (easy top 500 then) or a bunch of incremental other tweaks like throttle bodies, filters, air box, upgrade rest of exhaust etc.

odonnks

Bazman, did you get any dyno results before and after the tune alone? From what I've read here the majority of the change to a 507 with a tune is the increased throttle blip during downshifting.
Would you agree with this?

Thank you !

Bazman

Definitely disagree. While you will not see the same gain on a 507 as you will on a base C63 you will still see a worthwhile gain. Base C63's have 80% throttle lol. Hence a retune simply makes that 100% ;-) oops, did I say that out loud and remove the mystique?

My 507 is right hand drive so already has the ROW air box without the charcoal filters as OEM stock:

Stock 507 - baseline 432rwhp
Tuned 507 - 460rwhp
Add DPE hand finished and coated headers and cat delete then retune - 485rwhp

It may be possible to reach 500rw now by simply adding rest of exhaust upgrade, Renntech bigger airbox and throttle bodies - however the combined cost of all that would be better spent on Weistec heads that will add a lot more power.

JPaul63

I have never seen a tune only C63 even on race gas put down 460rwhp unless the dyno was very optimistic and you were dynoing in 0F air.

Ported heads will gain you 8-12rwhp, this has been proven, with 70% or more of the gains coming from the valvejob. The factory heads are that good.

There are plenty of bolt-on C63s rocking 500rwhp without going into the motor. No offense but i find your posts to be quite misleading as to what's actually been proven to work vs your theories.

Bazman

Misleading?

Theories?

I just quoted actual real world data, how is that either misleading or theory?

My tuner is regarded as one of the best in my country, a tuner other tuners go to when they have problems. He built his own dynos, sold them to many other tuners. They are known to be conservative. I could lay down a misleading 500rwhp by going to a dynojet near me. I have done so in other cars and compared so if you want to test me I'll back it up. The 460rw for a tuned UK 507 is not optimistic, it is on the upper end of what they do, so I just have a good one.

re Heads real world results - seems to vary based on what else has been done... might be only 20hp on a stock motor, but that'd still be enough to get me 500rw.... but then on checking I see the MHP air intake system can make 30hp so if that was true would be a cheaper way to get there and much cheaper than Renntech. I see you have a carbon fibre air intake, headers and a tune and claim 501rwhp.... good for you, that just proved my point. Thank you.

bhamg

This. Of course, I've seen an 80 rwhp spread on dyno results posted here for essentially the same mods, but 500 with the normal bolt-ons is simply not a realistic figure, at least on any dyno I've ever used.