Dyno Problems!!!
#1
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06 S55 AMG, 03 SL55 AMG, 02 S430(sold), 05 F150, 06 Ranger, My baby 07 HD Rdking
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Well me and my cousin took our cars to a local dyno shop, we put my S55 on dyno first, then I put the car in dyno mode, then when they tried doing a first pull, they figured after hooking every thing up, that the boost cable wasn't hooked up, to measure sc psi, so after performing first run, without boost, they figured to pull the car off the dyno, to figure out where the boost connects to, so before even moving the car I turned dyno off, then as soon as he pulls it off dyno, my rear wheels just dumped, I mean were slammed all the way down, and the ABC was not working, visit workshop message appeared, and when I opened my hood, the ABC dipstick, that has a small bleeding hole in it, was leaking fluid from that hole, a small amount of hydraulic fluid leaked, and the ABC still not working, tried to disconnect the battery, but nothing, the error message disappears for less than 1 min of driving, then comes back on. The front isn't as bad, but still not balanced, and when I press the raise buttons, nothing comes on, and the car actually drops in the back more, after it slightly adjusts after a little drive. Any idea why this is happening, or what can I do?
Also after fixinng the problem, when I go to dyno the car, what #s should I expect my Air to Fuel ratio to be within?
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Last edited by BallzyS55; 02-12-2008 at 01:05 AM.
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Personal opinion.....when they were strapping things down in the back, they clipped a line.
Man bro, you sure are having bad luck on the car front.
2nd, unless you are dyno'ing at Affalterbach Germany, I have rarely heard of a dyno guy wanting to hook up a boost gauge on a run.
As I told you before, have them clamp the exhuast pipe to snag a wideband Air Fuel and run the darn car. We have guys here that could work for AMG and can tell you straight up if your car is messed up. We just need that dyno chart.
Gotta take the car to the stealer and have um check the lines, then tell the dyno guy to take some Xanax, strap the )#$#($*in car down and run it. If we can see the Air Fuels and the runs, we can at least compare to other guys and see.
PS. Only way I know of getting actual boost is drilling the surge tanks and installing boost guage. Perhaps the other guys know of something though.
Man bro, you sure are having bad luck on the car front.
2nd, unless you are dyno'ing at Affalterbach Germany, I have rarely heard of a dyno guy wanting to hook up a boost gauge on a run.
As I told you before, have them clamp the exhuast pipe to snag a wideband Air Fuel and run the darn car. We have guys here that could work for AMG and can tell you straight up if your car is messed up. We just need that dyno chart.
Gotta take the car to the stealer and have um check the lines, then tell the dyno guy to take some Xanax, strap the )#$#($*in car down and run it. If we can see the Air Fuels and the runs, we can at least compare to other guys and see.
PS. Only way I know of getting actual boost is drilling the surge tanks and installing boost guage. Perhaps the other guys know of something though.
Last edited by Jakpro1; 02-12-2008 at 10:50 AM.
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06 S55 AMG, 03 SL55 AMG, 02 S430(sold), 05 F150, 06 Ranger, My baby 07 HD Rdking
well I guess I'll take it to the dealer, do you think they'll flash the ecu? cause I don't want them to do so before dyno, as I want to get all the facts.
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06 E55 SOLD, 89 300 SE 375,000 miles
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I have to agree with Jakpro. It does sound like they clipped a line. Get it over to the stealer and have them fix it, and send the bill to the Dyno shop
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Unless you already have a vacuum outlet hooked up, there is no need for a boost line. Everything can be pretty much be determined by the readout you'll get from the dyno chart.
By the way what dyno machine are they using?
Good Luck Bro!!!!
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06 E55 SOLD, 89 300 SE 375,000 miles
What Stealer are you taking it to?
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06 S55 AMG, 03 SL55 AMG, 02 S430(sold), 05 F150, 06 Ranger, My baby 07 HD Rdking
mbamg can you call me when you get a chance, my daughter threw my phone in the toilet, I lost your #
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06 E55 SOLD, 89 300 SE 375,000 miles
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06 S55 AMG, 03 SL55 AMG, 02 S430(sold), 05 F150, 06 Ranger, My baby 07 HD Rdking
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'08 CLS63
actually on a N/A engine you want to be in the high 13's to low 14's if i'm correct? back in the day we always used a brake dyno and from what i remember the F/I motors needed to be around 12.1 - 12.5 with a bsfc (brake specific fuel consumption) of .55 (just a hair over 1/2 a pound of fuel per horsepower) and the N/A engines were around 14.1 with a bsfc of .44 different motors required different fuel consumption...aluminum heads, pop-up pistons, dished pistons, compression, ect....it's been 17 years so i may be mistaken.
john
john
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'08 CLS63
i understand now...with the lower octane you would want lower numbers...thanks for the refresher!!
john
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On a FI car, 12.0 is pretty much stoich...if it starts off a bit lean (14.0), then drops down quickly as you get in to boost, then you are OK...IMO, 10.0 is way too rich, especially if they are using a sniffer to test A/F...I would try to be somewhere in the 11.5 range to be on the safe side with optimal performance.