Post Evosport Stage I dyno
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Post Evosport Stage I dyno
Dyno'd my car post Stage 1 (Pulley + ECU/93 + SL55 Splitter) yesterday on 93 octane. 325 HP and 329 TQ. Not quite what I expected. I had done a pre-mod dyno three weeks ago which came out at 288 HP and 294 TQ (on 91 octane). The tests were done on the exact same dyno machine, by the same employee (of The Dyno Shop in Santee).
I notice that the air/fuel mixture drops from 12.0 at 5700 to 11.8 at 5800; 11.7 at 5900 and 11.5 at 6000. Any ideas?
I will post the printouts if anyone will tell me how.
I notice that the air/fuel mixture drops from 12.0 at 5700 to 11.8 at 5800; 11.7 at 5900 and 11.5 at 6000. Any ideas?
I will post the printouts if anyone will tell me how.
Newbie
Joined: Feb 2004
Posts: 16
Likes: 0
Exactly! what I just posted why the MPG can get better. Leaner fuel mixture gets better MPG , AND more power. However "rich is your friend". Boosted motors should run a little richer IMO due to the maifold pressure and dynamic pressures of the engine. High 11 is fine IMO.
You still had close to 40 RWHP added why were you bumbed?
You still had close to 40 RWHP added why were you bumbed?
Super Member
Joined: Jan 2004
Posts: 538
Likes: 2
From: Silicon valley
Audi C7.5 S6
A/F ratio sounds right for a street car.
If you have lots of money and can afford to replace the motor, then one could tune it leaner to 12.5, but I would NOT do this.
Fuel makes the mixture cooler and less likely to detonate.
Enjoy your power. By the way, the fuel grade and temp can make a big difference.
Don
Fuel makes the mixture cooler and less likely to detonate.
Enjoy your power. By the way, the fuel grade and temp can make a big difference.
Don
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Lazy pig of a C32
Based on Evo's estimates, I was expecting more like 340 hp out of the sow. Anyone have any ideas why I am producing less than the estimated 50 rwhp gain and why I am producing more TQ than HP (when the stock ratings have HP substantially in excess of TQ)? Give me your knowledge or I will find you and pour STP in your gas tank.
MBWorld Fanatic!
Joined: Dec 2001
Posts: 1,553
Likes: 1
G
go dyno again after a few a hundred miles or so and see what happens ..maybe it was the temp in the shop? my dyno was on the low end of the scale compared to some others here but i ran a 12.9 (no pulley upgrades etc) in the quarter which is keeping me happy for now to stay away from mods
Trending Topics
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Thanks Silva and Ronnie for pointing out the painfully obvious: You spent the same $ and got more HP. Gloating BassTurds! (Now figure out why my hog is running slow!)
MBWorld Fanatic!
Joined: Sep 2002
Posts: 2,923
Likes: 3
Mercedes Benz
well
breathe in breathe out vomit!
Your car is FINE. The AMG Kompressor motors are known for a large discrepency in power. Some make well more than the claimed 349 stock while others make 10% less than the claimed number. The law states the car has the right to be 10% down on power and not be defective.
Your car is about spot on for power figures and remember Cali gas is = to donkey ****!
Some 5.5L Kompressor motors make 540hp stock while others make 469 hp. My fingers are crossed for my next car!
Run the numbers....340 is a great figure!
Your car is FINE. The AMG Kompressor motors are known for a large discrepency in power. Some make well more than the claimed 349 stock while others make 10% less than the claimed number. The law states the car has the right to be 10% down on power and not be defective.
Your car is about spot on for power figures and remember Cali gas is = to donkey ****!
Some 5.5L Kompressor motors make 540hp stock while others make 469 hp. My fingers are crossed for my next car!
Run the numbers....340 is a great figure!
MBWorld Fanatic!
Joined: Feb 2002
Posts: 1,038
Likes: 1
C32 AMG
Vomit: When K&N filters come in, bring the car back we will dyno your car again.
My guess it just needs some more miles.
Also the size and capacity of the dyno cooling fans is very important. If there is not enough cooling, DME will pull timing out at the top.
If you a chance e-mail or fax me your dyno run. Thanks.
My guess it just needs some more miles.
Also the size and capacity of the dyno cooling fans is very important. If there is not enough cooling, DME will pull timing out at the top.
If you a chance e-mail or fax me your dyno run. Thanks.
MBWorld Fanatic!
Joined: Dec 2001
Posts: 1,553
Likes: 1
G
Re: The 185 mph 1/4 mile (Evil K. attempts the Grand Canyon)
Originally posted by Vomit
You did a 12.9 stock quarter? Were you on a 6% downhill grade?
You did a 12.9 stock quarter? Were you on a 6% downhill grade?
yes stock with just drag radials and on a official track not some g-tech time
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Post-EvoI Dyno
Thanks for the info people. The issue is not so much the absolute HP figure (325) as it is the less-than-expected Stage I gains (37 HP). Had my car been generating 275 HP before the mods, a post-mod reading of 325 would have been fine. Since I was already pulling 288 HP before the mods (on 91 gas), 325 HP (on 93 gas) does not thrill me. By all accounts, everyone is getting at the very least 50 HP from the same mods. Evosport seems like a well-run business with smart people, and I am sure that they (and all of you!) will help me figure out where the other 13 or so ponies went.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
HP
Thanks Vadim for agreeing to look at the dynos. I have faxed them to you. If anyone else wants a copy of the two runs, email me a fax number and I will send them to you.
A few comments about my pre and post-Evo mods runs: The barometric pressure was higher for the post-mods run (30.11 vs. 29.85 for the pre-mods run), the vapor pressure was higher for the post-mods run (.36 vs. .27 for the pre-mods run), the intake air temperature was higher for the post-mods run (71.3 F vs. 60.7 F for the pre-mods run), and the gear ratio was lower for the post-mods run (43.09 RPM/MPH vs. 61.19 RPM/MPH for the pre-mods run). As for the gear ratio issue, I had instructed the shop before both runs to do it in 3rd gear, as this is what I had read on the forum. Was one run done in 3rd and the other in 4th? Would any or all of these factors explain the relatively low HP gains from the pre to the post-mods dyno? I know that the 10 degree intake temperature difference would affect HP somewhat, but how much?
A few comments about my pre and post-Evo mods runs: The barometric pressure was higher for the post-mods run (30.11 vs. 29.85 for the pre-mods run), the vapor pressure was higher for the post-mods run (.36 vs. .27 for the pre-mods run), the intake air temperature was higher for the post-mods run (71.3 F vs. 60.7 F for the pre-mods run), and the gear ratio was lower for the post-mods run (43.09 RPM/MPH vs. 61.19 RPM/MPH for the pre-mods run). As for the gear ratio issue, I had instructed the shop before both runs to do it in 3rd gear, as this is what I had read on the forum. Was one run done in 3rd and the other in 4th? Would any or all of these factors explain the relatively low HP gains from the pre to the post-mods dyno? I know that the 10 degree intake temperature difference would affect HP somewhat, but how much?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Simonlam understands my point
Simon, you were at 318 with just the pulley. I am at 325 with another big chunk of $$$ spent besides the pulley. That's my point. It's as if I basically got the full thirty horses out of the pulley and a few out of switching to 93 octane, and that the $ spent on the ECU and the SL55 intake did not accomplish much. I have put more than 300 miles on the car since having the work done. When would one expect the sleeping mares to suddenly awaken? FYI I have not driven the car gently since the mods.
I realize that I am whining incessantly, but hopefully you all can understand my point. If I would have been happy with "30-something" additional HP, I would have just done the pulley.
I realize that I am whining incessantly, but hopefully you all can understand my point. If I would have been happy with "30-something" additional HP, I would have just done the pulley.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Thanks Vadim!
Thanks Vadim (Evosport) for getting back to me on my dyno results. I continue to believe that Evosport is an excellent shop producing and installing excellent products at good prices. Your attention to customer concerns is admirable.
It sounds like my dyno shop down here maybe was a little "clueless." In particular, I do not remember seeing any cooling fans placed in front of my vehicle at the time the test was being run. If the timing was retarded by the computer as a result of engine heating, this would certainly explain the low HP figure (and would also explain why my "seat of the pants" evaluation of the modded car is alot more than 37 HP). Also, it looks like they used "standard" HP figures instead of SAE and did the post-mods dyno in 4th (rather than the requested 3rd). I will take the car back for re-dyno in the next few days & will post. I never realized dyno testing was such a touchy issue. Hopefully, this info will help others to avoid my mistakes/problems!
It sounds like my dyno shop down here maybe was a little "clueless." In particular, I do not remember seeing any cooling fans placed in front of my vehicle at the time the test was being run. If the timing was retarded by the computer as a result of engine heating, this would certainly explain the low HP figure (and would also explain why my "seat of the pants" evaluation of the modded car is alot more than 37 HP). Also, it looks like they used "standard" HP figures instead of SAE and did the post-mods dyno in 4th (rather than the requested 3rd). I will take the car back for re-dyno in the next few days & will post. I never realized dyno testing was such a touchy issue. Hopefully, this info will help others to avoid my mistakes/problems!
Senior Member
Joined: Aug 2003
Posts: 411
Likes: 0
From: Hong Kong
c63
I got 367 HP in 4th gear.
(Pulleys + Powerchips + IC + SL55 full intake + Dual Exhaust <no mufflers> + 98 Octane + Gold Mobil One 0W50)
Weather: 20 c
Miles: 18750
I sent my own computer to Powerchips directly.
(Pulleys + Powerchips + IC + SL55 full intake + Dual Exhaust <no mufflers> + 98 Octane + Gold Mobil One 0W50)
Weather: 20 c
Miles: 18750
I sent my own computer to Powerchips directly.
Last edited by simonlam168; Feb 26, 2004 at 09:35 PM.
Member
Joined: Feb 2004
Posts: 83
Likes: 0
C32 and 98 C5 Vert
This dyno thing has gotten out of hand. If you really want to know how much HP you are making:
1. weigh your car
2. goto a drag strip
3. get a mph in the 1/4
based on the weight and mph you get a very good reading of actual hp.
The dyno is a tuning tool, not a measure of your cars performance.
BTW: I have a heads/cam C5 corevette that only dynos 371 but runs 120 in the 1/4.
1. weigh your car
2. goto a drag strip
3. get a mph in the 1/4
based on the weight and mph you get a very good reading of actual hp.
The dyno is a tuning tool, not a measure of your cars performance.
BTW: I have a heads/cam C5 corevette that only dynos 371 but runs 120 in the 1/4.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,645
Likes: 2
From: San Diego
2002 C32 Black/Charcoal
Re-Dyno
Hey CS: Haven't done so yet. Shop where I had it done has agreed to give me a freebie. Will probably do it next week (and make sure that they use some cooling fans this time). I'll post the good or bad news. Am also going to the dragstrip with Dink this weekend, we'll post our times next week.
