EC 550 Injector Install and Review
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Joined: Dec 2009
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From: SOCAL
2004 E55
An 80mm TB is not 80mm, closer to 78mm. This has been discussed in the past.
If someone wants to mod their car, so be it. EVERY single person here that has done the TB mod has reported back with positive results. EVERY one of them. Every little bit helps, even if the TB shave was worth 10hp, 10 here, 10 there, it all adds up. It is worth it to some, perhaps not to others, but there is no need to knock what you have not even attempted.
There are those that believe tires/wheels will never improve handling, a dyno is not representative of mods, that more airflow does not matter, that exhaust is a waste, pulleys are not proven,etc,etc,etc,etc. There will always be those in one those camps.
If someone wants to mod their car, so be it. EVERY single person here that has done the TB mod has reported back with positive results. EVERY one of them. Every little bit helps, even if the TB shave was worth 10hp, 10 here, 10 there, it all adds up. It is worth it to some, perhaps not to others, but there is no need to knock what you have not even attempted.
There are those that believe tires/wheels will never improve handling, a dyno is not representative of mods, that more airflow does not matter, that exhaust is a waste, pulleys are not proven,etc,etc,etc,etc. There will always be those in one those camps.
No if you get the CORRECT 80mm TB it happens to be 80mm
and you make some mighty big assumptions on what I have and have not done, to my 55 or any other car I might be involved with. (Love your edit, you originally claimed that I'm stock... Don't be so sure of that)
I know what works and what doesn't work, nothing special about the E55's motor, it's just an airpump just like every other motor...
Last edited by AMGPilot; Sep 12, 2010 at 10:29 PM.
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Thread Starter
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From: Toronto
CLS63 PP
I love how everybody on a forum thinks they are the expert on YOUR car. People are either not reading or not getting it. Like when someone tried to tell me my car did not get a 42whp gain from the bolt on of the Nameless headers, despite the fact that I dyno'ed it, rolled it off the dyno, bolted on the headers, and re-dyno'ed within 3 hours on the same dyno with the only change being the headers. I am not claiming a ported TB made 40whp. I am saying that the combination of the mods I added over the weekend "feel" like a 40whp..or rather should I say 40wtq, since you can't "feel" hp as hp is just a math equation, while Torque is a force. I will dyno on saturday and let you know how accurate my butt dyno is then.
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From: Philadelphia, PA
2008 A8L, 2002 996TT X50, 2009 X5
The OP makes a good point, and I think the critical responses aren't acknowledging that he's simply stating "hey it feels like X". A lot of things can make a vehicle "feel like" it has more power, even when there isn't any (e.g. Sprintbooster).
The responses are correct though (IMHO) of the technicality that injectors should net zero HP or TQ gain if your prior AFRs were well tuned (and sounds like they were) and if the injectors weren't a major limiting factor for the applied fuel/timing map. Maybe a tiny bit of HP up top, only if the injectors were a fueling limitation with your other mods - but 40 rwhp would be unlikely. Same with plugs - might make the car run smoother, feel better, but if the gap and temp range are the same as stock, should have no material difference on power/torque. The shaft grind? Maybe a couple hp or few ft-lbs, but probably not many. So, we're left with the new tune - which is the "X factor" here, and could be the major difference in both "feel" and actual output.
Do you datalog? If so, do you have logs of timing and fueling during WOT?
The responses are correct though (IMHO) of the technicality that injectors should net zero HP or TQ gain if your prior AFRs were well tuned (and sounds like they were) and if the injectors weren't a major limiting factor for the applied fuel/timing map. Maybe a tiny bit of HP up top, only if the injectors were a fueling limitation with your other mods - but 40 rwhp would be unlikely. Same with plugs - might make the car run smoother, feel better, but if the gap and temp range are the same as stock, should have no material difference on power/torque. The shaft grind? Maybe a couple hp or few ft-lbs, but probably not many. So, we're left with the new tune - which is the "X factor" here, and could be the major difference in both "feel" and actual output.
Do you datalog? If so, do you have logs of timing and fueling during WOT?
MBWorld Fanatic!
Joined: Jul 2005
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
My car feels fck fast if I have not driven it for a week or 2... but nothing has changed. Thats why we use dynos.....
Thread Starter
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From: Toronto
CLS63 PP
Stock: 406whp, 452wtq
Headers: 448whp, 476 wtq
185 Pulley and Tune: 500whp 575wtq
Injectors, Porting, Plugs and new tune: TBD
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From: Toronto
CLS63 PP
Will probably go either this or next Wed. Want to get a trans flush done before I go as it's shifting a little rough. If I can cut 1.7's on my 20"s like last time out, should go well into the 11's
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From: Lafayette, IN
2008 ML63 2009 SL63 2010 Alpha 7 GTR
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Joined: Apr 2009
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From: Lafayette, IN
2008 ML63 2009 SL63 2010 Alpha 7 GTR
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From: Vancouver, BC
CLS55 AMG
hey there, i'm doing a similar set up as yours, but I'm not going with a 185 pulley, doing the s/c pulley when it's released. would you recommend i got with the colder plugs on my car as well?
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From: UK
E55K AMG
thanks for the info
good luck with the next dyno run after your last mods in your list
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From: Puerto Rico
2005 E55 AMG
Well, I dyno'd before and after my EC injectors and I LOST 8whp. Granted, I can say that it's the difference between one day and the next so 8whp is nothing...but it only proves what I've said since the beginning that no one here has GAINED 20-30whp by installing injectors. If they gained anything at all it's because the tune changed towards being more aggressive, but it's not because of the injectors.
