S70T5

Hi

Thought I should share my dyno results for anyone who wants to compare before and after mods.

Its a 2003 E55 amg with 105 000km.

Standard, no mods at all. Dyno at flywheel.
Power = 334kw
Torque = 667nm



Removed the 4 cats, installed knfilters and left s55 intake pipe.
Not worthwhile, didnt get much more power.



Power = 339kw
Torque = 689nm



I then fitted a Eurocharged sc pulley and loaded an ec tune as well.

power = 375kw
torque = 742nm




All these readings are flywheel. Went to another dyno which gives wheel power figures

Power = 325kw at wheels
Torque = 697nm at wheels

Manuyc

Nicely detailed

viren.89

so 325 kw at wheels is 435 whp
697 nm would be 515 lb/ft
I am not sure if these are good numbers or not considering all you got is a S/C pulley and tune.

Manuyc

I didn't log much info like you did. I did a lot of work then dynoed mine

S70T5

It seems about right, based on the dyno graph on Eurocharged's website. Eurocharge state 442hp at wheels for pulley and tune.

If I convert kw to hp
http://calculator-converter.com/conv...calculator.php

325kw = 441 hp

I got 328kw and 684nm on my 1st dyno run, but operator printed the 2nd run. 328kw = 445hp

Whats interesting, is the fact that the 4 cats are not restrictive, had I known, I would not have had them removed as the gains were minimal.

FinanceMike

The manifolds are very restrictive. I picked up almost 40whp by installing Kleemann headers. The rest of the exhaust is very well made by the factory. Removing pieces is mostly sound improvements.

S70T5

Im waiting on a quote from TNT Exhausts to quote on the headers.
Here is an example of what they made for a c63.
Scroll further down in the post to see the locally manufactured units.
http://www.carforums.co.za/viewtopic.php?f=7&t=46783

ajm55

I have TNT headers on my 55k. They yielded a 20wkw gain (tested on two dynos) - and that's at Johannesburg altitude. Best value for money mod I've done so far.

S70T5

AJM55, do you have pics of the headers before install ? Im in Cape Town, was recommended to go with tnt as they do a good job. Can get it made here in cpt but they need the car for 2 weeks to fabricate it. TNT has a template already, which would only mean a 1 day install.

ajm55

I should have pics pre-installation. Will try to find them. It'll be easier for me to email them so let me have an email address please.

S70T5

Thanks, pm sent

S70T5

Got a quote for the headers. The price with fitting equates to about $ 800, would have been less if I was in the same city as the manufacturer.

Exotic-metal55

Nice dyno info and detailed run info.

Looks like SA has several nice custom header fab options.

chawkins2001

Nice one boet, what part of Cape Town? I am from the Fresnaye-Bantry Bay area and went to Camps Bay High.

Once you get that beast setup, take it up the coast towards Landudno and open that sum b***h up!!!

Crissus

Wow 800$ for a set of Long tube headers?
I want a set too! :-)

S70T5

I live in Lansdowne. I dont go much to Camps bay side, only when I have to do some work at my bosses house/villa, www.campsbaybeach.net

Crissus, you can fly to Johannesburg, pick up the headers for $ 570, plane ticket should be about $750. Get to see another country for the same amount as buying headers online. Stay for free using www.couchsurfing.org

KraljAco

What's the name of the company who made you that headers?

S70T5

Headers were made by www.tntexhausts.co.za

Installed headers yesterday, ran dyno today, previous dyno run was done in 3rd gear but different dyno operator on same dyno says it must be done in 4th. Power and torque are both down, and the graph is not smooth.
Power wheel = 303kw
Torque wheel = 673nm

Crissus

Arent those numbers way off?
In the upper part of this thread i read about 510HP at the crank after pulley and tune... I don't know but for my CL 55 AMG thats just 10HP above the stock rating...
Even for the E55, thats just a 34HP increase at the crank.

Stock rating CL55 AMG Kompressor: 500HP (DIN) and 700NM (DIN)
Stock Rating for E55 AMG Kompressor: 476HP(DIN) and 700NM (DIN)

Weren't the smaller SC pulley and EC tune supposed to produce more like 50HP at the crank?
I read multiple times that with smaller SC pulley + Tune, 82mm TB, Headers, looped-rail+550cc injectors, power would be 600HP at the crank.

For your header problem:
You need to get a tune for it adjusted.

S70T5

The car is after all 10 years old with 105 000km
Stock it made 454 hp at crank, with decat, kn, sc pulley and tune it makes 510 hp at crank. Hard to compare cars with so many variables like fuel quality, compression status of each cylinder, condition of spark plugs, injectors, fuel pump, etc. Over stock its about 13% increase in power.

I just cannot understand why the car is making less power with headers.

I went to another dyno today, to get a dyno run with afr. This is flywheel kw. I however reset my ecu before I did this run, also iat were 15 degrees cel less than yesterday. Although cant compare the 2 dynos, the graph shape is much better.

power = 408kw

3000rpm = 12.8 afr ( -5.5 timing ) - 33 deg cel iat
4000rpm = 12.2 afr ( -10 timing ) - 38 deg cel iat
5000rpm = 11.7 afr ( -22 timing ) - 42 deg cel iat
6000rpm = 11.1 afr ( -15 timing ) - 50 deg cel iat

S70T5

Found a fault, the exhaust shop removed the coil packs to fit the headers, they mixed up the wiring on one cylinder. I rectified it.

Did 2 dynos runs, one 45 mins after the other, dynotech and jdmworx. Dynotech = flywheel, jdmworx = wheel

Dynotech - 382kw - iat started at 48 deg C, power would have been higher if the fan was used earlier to cool it down.
Jdmworx - 332kw - iat started at 32 deg C, did one run at 50 deg, power was at 328kw.

Graphs are also smoother than last time. Overall got 7wkw more after headers, I think the plugs are old, will get 1 step colder and a new ic pump.

C32owner

Geepers mate, only 7kw more... That's pretty bleak when MBH is offering money back guarantee with no less than a 40whp increase with just their headers

S70T5

I suppose it doesn't show much gains on the dyno but the car certainly does feel fast. Using a Samsung galaxy gps, shows 0 to 200km/h in 12.7 sec.

C32owner

Wow nice,that is moving some.. Well after my poor gains after installing upper pulley and supposedly doing a custom tune I only got 15RWHP gain. So your 7kws is now quite a bargain in restrospect!!!

AutoLuxury

Hmmm those numbers seem a bit off. You will need to get tuned for those headers.