MHaynes772

Well today I went to a buddy of mine's shop and got my E55 dynoed. My car has the resonators cut off and has an X-pipe and K&N filters with snorkel mod. I drove the car there (~30-40 miles) and let it cool with fan on it for like 20 minutes. The dyno type was a DYNO DYNOMATICS. Made 3 pulls and made:

382.5 rwhp
444 rwtq

So what do yall think?

Matthew Haynes

MB Fanatic

Seems a bit low doesnt it? Have your intercooler pump checked by the dealer, and have the superchargers clutch checked jsut to be sure. I would expect somewhere around 400 rwhp for a stock. Even the torque is considerably low. Something doesn't seem right, or im just retarded.

MHaynes772

Okay....that is what I thought too...maybe it's the type of dyno?

MB Fanatic

I doubt it. I would surely have the dealer check a couple things out. Have the intercooler pump flow tested. Sounds like you have a bad pump. I had a bad pump and needless to say the car felt sluggish.

MHaynes772

Okay, I'll do that. But the car really doesn't really feel that "sluggish". Although I might now know the difference. BTW- what do I tell the dealer when they ask why do you want that checked? And why do you feel it feels sluggish?

Thanks!

MB Fanatic

tell them that the car doesnt respond when you go WOT. Thats all I told my dealer and he found that the intercooler pump had shorted out.

e55 baller

Have them log your IATs and A/F so you can analyze your dyno. I dynoed 400/439 at the wheels with similar lite mods.

Take the car down the track on a good air day (make sure density altitude is < 1000 ft.) If your trap speed is below 114 you have may have a bosch pump issue as others have stated. I trapped 113.6 with a 2000 ft DA which is about 115.6 mph corrected.

medici78

Seems to be below the curve. Maybe it reads horsepower differently than a Dynojet, which seems to have become the standard. I know Mustang dynos are dubbed "heartbreakers" because they tend to read much lower than Dynojets. Perhaps DYNO DYNOMATICS is the same way.

MHaynes772

I was told that they do read lower than dyno-jet

medici78

Then I wouldnt worry. If the car feels strong to you, then i'm sure its on par. If you really want to make sure, find a facility with a DynoJet.

BoBcanada

how many runs did u do before, did u have the fan in front? maybe its heat related?

MHaynes772

I made 3 pulls, with 10-15 minutes break, and then it had 2 huge fans in front with an air conditioned fan blowing behind those (one of those $2200 a/c fans). But my car was still like a SAUNA under that hood. Maybe the intercooler pump did go out?

medici78

Can't comment on the intercooler pump, but ALL E55's are Saunas underhood.

vraa

Except saunas are supposed to feel relaxing...

darren_dallas

Your numbers aren't that far off. Others on here have dyno'd 391-411rwhp on dynojets. Mustang dynos run about 10-15hp low and if this dyno machine is similiar to a Mustang dyno then you'll be off by a similar amount.

Other things that affect the dyno are temperature in the bay of the shop and humidity. Do you know either when you did the pulls?

I don't think you have anything to worry about. If you're pump went out I would think you'd have a much lower pull considering the engine temps would get way too hot and the ECU would intervene and disengage the supercharger.

Vetluver

Matthew, I know this is pretty basic but did you put it in dyno mode?

Another thought is did you have a strong fan going thru the radiator? Both can effect HP ratings. BTW is your bud in Jackson? I may have to make a trip over to get mine dyno'd for kicks and grins. We don't have a dyno as far as I know here in Monroe.

MHaynes772

Yes, I had it in dyno mode, and yes he is here in town.

rflow306

According to some sources online it reads lower by about 15 to 30 rwhp. But if you want to be 100% sure take it to the track, the best dyno around.