Dyno Day SSR

[Billy-cls55]

Alps - I think I will probably go with the 1275 version. I have noticed a small amount of black dust near the pulley so maybe my belt is slipping a little. I guess the best thing would be to do a simple calculation but I don't have my original pulley to hand, can someone confirm the difference in diameter between them?

Okay forget what's gates technical told me they are wrong, the original belt is approx 1300 mm just measured it, the new one I bought is 28mm wide 1274mm long, so the ones you are buying should be fine, nothing in it really.

 

[simon1966]

Okay forget what's gates technical told me they are wrong, the original belt is approx 1300 mm just measured it, the new one I bought is 28mm wide 1274mm long, so the ones you are buying should be fine, nothing in it really.

Cheers Billy - I have just ordered the one Alps has mentioned (Gates 8pk1275es) from UK supplier. Not green though, so won't look as good

 

[Billy-cls55]

Cheers Billy - I have just ordered the one Alps has mentioned (Gates 8pk1275es) from UK supplier. Not green though, so won't look as good

Forget your decats, xpipes, nitros,

Green colour thats what gives me that extra power

 

[simon1966]

Forget your decats, xpipes, nitros,

Green colour thats what gives me that extra power

Yeah - I'm green with envy!

Think I'm gonna have to powder coat my supercharger and intakes too as I'm sure that will give me an extra 10%

 

[DSB SL AMG]

Hi Simon....secondary de-cat, resonator box removed, K/N fitted on mine...

Cheers
DSB.

 

[Billy-cls55]

Hi Simon....secondary de-cat, resonator box removed, K/N fitted on mine...

Cheers
DSB.

Did you ever dyno before exhaust mods? Did you gain any power?

 

[simon1966]

Hi Simon....secondary de-cat, resonator box removed, K/N fitted on mine...

Cheers
DSB.

Hi David

Thanks - reckon a de-cat will be on the cards for me or at least some sort of exhaust mods. I have always thought it needs to be a bit more tuneful as a V8 should be!

 

[SavMan]

Primary decat is the best way, or as Richard did in his CL he fitted 200 cell cats in place of his primary's

 

[SavMan]

I get the feeling Billy is a man on a mission

 

[simon1966]

Primary decat is the best way, or as Richard did in his CL he fitted 200 cell cats in place of his primary's

Paul - I assume you mean Richard with the CL55 off the other forum. His car did sound good but to be honest probably a bit too loud for me as my every day car. I would like mine to be a bit more gruff, as said before I do like the sound of C63's, so I am sure Alps' car must sound good. I have discussed a few options before with Olly, just difficult to know without actually hearing the alternatives. Oh and of course if it can sound better and give bit more power then happy days

 

[simon1966]

I get the feeling Billy is a man on a mission

Second that

 

[Cyclone1]

An easy way to check for belt slippage dust, is to check the underside of the front cover that sits on top of where the supercharger pulley is located. Take it off, give it a clean, run the car for a few days, then check again.

Jules

 

[Cyclone1]

Quick tip on making the car feel alive again, especially if you do motorway mileage and don't get to open it up that often....

1. Get in the car, put the key in and turn to the on position without starting the car
2. Press down fully on the accelerator pedal and hold for 5 seconds
3. Turn the key back to the off position (straight after lifting off the accelerator)
4. Wait for 2 minutes
5. Start the car up and drive

This has probably been posted on here before, but works. It will not affect any maps etc..

Jules.

 

[SavMan]

Here's my experience so far with an E55 exhaust system (including headers) and the steps I have taken

1. Sec decat delete with X-pipe, sound become deeper at 3k+ no difference at low rpm and still very quiet in comparison to a CLS/CL/SL 55K

2. SS "Shorty" Headers slightly increased noise at 2-3k with more burble again still very quiet compared to a CLS/CL/SL 55K

3. 3 inch exhaust with the above SS headers, no Pri or Sec cats X Pipe and standard rear boxes you can hear my car here https://www.youtube.com/watch?v=SpP0Tb9lOiY still not as loud as most CLS/CL/SL 55K's typically hits 102db. I still hate the sound!

3. All above but replaced headers with Long Tube Headers more burble now hits 104db

4. As per 3 but with standard rear boxes removed and "freeflow straight though" boxes added. CRAP what a noise it made the workman opposite EMP jump out of his skin. Sound level 116db, it was to much took them off and standard boxes back on.

So if I was to do it all again on an E55

For performance only not worried about sound

Kleemann Headers, Primary decat, no center box (it had 0.3 bar of back pressure)

For sound only

Change the rear boxes with C63 boxes or open the standard ones and remove some of the wadding (not sure if that is an accurate description but you know what I mean)

For a mixture of both performance and sound that wont break the bank

Primary decat and change rear boxes!

 

[simon1966]

Sounds like a mixture of both would be good then Paul. Olly had suggested opening up my rear boxes and removing some of the internals, but I would someone else to risk it first!

 

[Cyclone1]

Simon,

Given the mods you have then I think you have some sort of restriction occurring at 2250rpm to around 4.5k rpm, the graphs show all of the other cars have a similar shaped curve for torque and power and this is with slightly differing mods, yours is the odd one out. It changes just before the point where the engine is trying to deliver peak torque. All I can think of is plug / lead related or something in the ECU causing the restriction, however it is likely to be something fairly simple.

Out of curiosity did the other runs show this same trait?

Once this is overcome your power / torque will be the same as mine and Billys.

Mods wise I have a smaller supercharger pulley, secondary cats replaced with an X Pipe, resonator removed, Contitech 8PK1275 belt and recently fitted standard paper filters. Plugs have done 40k so need doing soon, passenger side cam cover is leaking so needs doing soon soon also and the display is now showing service overdue.....if it doesn't rain...lol

Plans are to fit an upgraded heat exchanger so that the car maintains it's power for longer. Am pondering the cheaper cooling option of the BMW or similar reservoir mod. If I ever go for a slightly larger crank pulley then would also look into headers. The only other items to do are the one's that Billy has done which again support maintaining the car operating at peak performance.

Jules.

 

[Cyclone1]

Sounds like a mixture of both would be good then Paul. Olly had suggested opening up my rear boxes and removing some of the internals, but I would someone else to risk it first!

Alps's car does sound really good, very different to other 55's with a deeper sounding '63 style crackle to the exhaust note.

If you just wanted to enhance the sound then this is a great option to go for if you can find a set of C63 boxes.

What you need to do is to arrange a mini meet with the cars you want to hear, then you can decide for yourself more easily It's also a good opportunity to get a few of us together. There might be a Santa Pod meet coming up soon that has been mentioned on here?

Jules.

 

[simon1966]

Simon,

Given the mods you have then I think you have some sort of restriction occurring at 2250rpm to around 4.5k rpm, the graphs show all of the other cars have a similar shaped curve for torque and power and this is with slightly differing mods, yours is the odd one out. It changes just before the point where the engine is trying to deliver peak torque. All I can think of is plug / lead related or something in the ECU causing the restriction, however it is likely to be something fairly simple.

Out of curiosity did the other runs show this same trait?

Once this is overcome your power / torque will be the same as mine and Billys.

Mods wise I have a smaller supercharger pulley, secondary cats replaced with an X Pipe, resonator removed, Contitech 8PK1275 belt and recently fitted standard paper filters. Plugs have done 40k so need doing soon, passenger side cam cover is leaking so needs doing soon soon also and the display is now showing service overdue.....if it doesn't rain...lol

Plans are to fit an upgraded heat exchanger so that the car maintains it's power for longer. Am pondering the cheaper cooling option of the BMW or similar reservoir mod. If I ever go for a slightly larger crank pulley then would also look into headers. The only other items to do are the one's that Billy has done which again support maintaining the car operating at peak performance.

Jules.

Thanks Jules

You will have gathered my knowledge is pretty limited which is why the help from you guys is so much appreciated. I will also be getting an upgraded HE. I will get my car hooked up and get some data logging soon so hopefully that will shed more light on whats going on.

I am going to the next Eurocharged event being organised by Acid so hope to meet up with a few more of you guys then,

Cheers Simon

 

[Billy-cls55]

Simon, I was thinking if you get some throttle body cleaner from halfords, you will need one holding the revs and one spraying, once done run for 5 mins, put it back together, disconnect the battery for 5 mins, reconnect, reset your windows and go for a drive, I think possibly you have a dirty TB.

 

[Alps]

hey si, its difficult to know how loud any exhaust mods are going to be, i decided to ry a bit at a time and the c63 rear boxes sound good by themselves, i still think a little louder would be nice, but then id kick myself if it started droning on the motorway.

as for power, i would concentrate on getting things like plugs, leads and gaskets out the way, also any leaks that are starting to show.

I have now done both the cam breathers, i left the gaskets as they were not leaking, rear oil seal, plugs, leads and replaced the paper filters with k&Ns.

you dont have to do everything at once, ive slowly done these bits over the last year or so.

keep a look out for some c63 rear boxes, they are still pretty scarce, but as there are alot of c63s around, they should come up now and then.