A-A-Ron

Well, I ran my car on the dyno this weekend and it came nowhere near what I was expecting. My car is 100% completely stock so I wasnt expecting anything unrealistic. My numbers were:

1st run: 371hp 456tq
2nd run: shut it down, guy on the dyno said it felt like timing was being pulled or something "didnt feel right"

Seeing is that I am at 120K and everything is all original I am guessing the I/C pump and or HE is shot. Is there anything else I should look into?

kustom2k1

You say the car is stock? I wouldn't worry too much about a major issue and concentrate your efforts on the IC pump. May very well be the stock pump from the original factory build.

2000UZJ

469 at the crank per MBUSA/AMG. 18% loss - 385WHP stock. Dyno's all read differently. I'd say your right in the range of what is normal. It's hard to simulate proper air flow into the engine/intercooler so your AIT's probably went up pretty quickly.

A-A-Ron

Oh okay, sounds like I dont need to worry too much then. I read that stock should be between 420-440 on a Dynojet so I was thinking I am about 50HP low.

Either way I am looking into an I/C pump and HE

Ls1toAMG

Here is my guess. Your IC pump is failing. Your tq is fine hp alittle low. Your peak tq is at a low rpm. By the time your motor got to the top end for peak hp it was starting to heat soak.jmo

veejay78

My numbers were about the same, stock as well, 80K miles.

Heart Breaker dyno (dyno dynamics). Dyno Jet equivalent was about 447.

IATs were high on mine which was pulling timing and running rich.

Haven't done anything yet to try and improve. The numbers may look disappointing, but the car is still fun to drive!

FinanceMike

If you were on a dynojet dyno, that hp number is low but torque is good.

A normal, healthy, stock 55k motor sees around 410 whp from my experience. (Give or take 10hp)

Check that inter-cooler pump.

DVC

It amazes me that people don't immediately install a fresh I/C pump upon purchasing these cars.

It's like wearing someone else's used underwear.

Rocman8

Don't forget fuel pumps/filters are very very important if they haven't been changed.

Elhonaz

Its just because some people STILL dont know about it/its purpose, even when its very easy to come across it here or google

Max.H

The used underwear comment was funny. I agree, intercooler pump is the first thing you should do on these cars. Heat exchanger doesn't really go bad from what I seen. But, bigger is always better.

Your IC pump is dead bro, your car was probably heat soaked very badly. You gotta let these cars cool down at least 45 minutes with the hood open. My buddies car did the exact same numbers heat soaked. He cooled it down and car made 410whp 457 torque

Change your IC pump and let the car cool down considerably before the dyno run. If you can start your dyno run under 95 degrees Intake Air Temp. You will see big numbers for stock. GL!

RobE55

Got a question...

Didn't I read somewhere on here that you can jump the intercooler pump to run all-the-time? Somewhere in the trunk, one of the drag people figured that one out. It helped when changing the IC pump to purge air also.

That might cool faster the soak issue when doing dyno pulls, with a new IC pump of course, or it should be SOP on the dyno.

Rob

Max.H

Yes that is correct. I will be wiring the IC pump to run constant with ignition on position 2. So, I can circulate cold icy fluid from my front mounted cobra intercooler tank with a split cooling system of course.

If you just cool the car down before dyno or a run, you will see substantial increase in power and track performance. Icy cool even better. Ive seen heat soaked E55's pickup 45-50whp from just cooling the car with ice bag over the supercharger.

A-A-Ron

Thanks for ya'lls input. I am going to do the IC pump and HE at the same time since I will have the front bumper off.

Anyone have input on the fabtech cooling kit that comes with the HE and the in engine bay cooling tank... nice to have or just stick with HE? I plan on doing the basics down the road (headers, clutched SC Pulley, tune).

Thanks again

Max.H

Engine bay cooling tank and splitting your cooling system will help tremendously. If you get an OBD2 app for your phone you can see just how much it helps your IAT's. GL!

realien

LOL

chawkins2001

What type dyno was it?

A-A-Ron

Dynojet

shardul

iTrader: (1)

change the pump and heat exchanger like everyone said and your problem will be solved.