ProjectC55

Took my car to get dynoed again and Wow ,what a difference.


George of www.ICSperformance.com felt that the car needed a serious tune up. After a couple of Dyno runs on the Dynojet the car only produced tops 275whp and 286 ftlbs of TQ.I was not happy at all.The E55 motor in my car should be doing at least 284-294whp and 296-301 ft lbs of TQ.So I'm down nearly 20whp and 15 ftlbs of TQ. When I put the 5.5L motor in the car I never chgd the spark plugs.At least not yet.Stupid me. However I never would have suspected a faulty Mass air sensor either.The prior owner of my C43 told me it was new.From reading www.MBworldforums.org There are many posts stating that the airmass has been known to fail even with out setting the CEL.

Well George says lets do everything from plugs to fuel filter to new airmass.I figured the hell with it the car could'nt run any worse.The low whp#'s and several dyno runs was really driving me crazy.The #'s kept getting lower and lower to 250whp.

George ordered 16 new Denso Iridium plugs,new Mass air sensor and fuelfilter and did the install.He also placed an O2 bung in front of the precat for the Wide band O2.Prior A/F #'s went as high as 16.5 and barely into 14.7 in the higher rpm's.LEAN! Like I said this was prior to the tune up.

By the way those plugs by cylinder #'s 3,4,7,and 8 can be a pain in the *** to get to.

So now everything is installed,plugs filter and air mass.We put the the car back on the Dyno and DAMN! The A/F was now down to 14.5-12.2.WHP has now gone up in the range of 290-295whp/TQ 300-311TQ.

We did several runs and the A/F ,whp and TQ stayed in a consistent range. My Gosh! what a difference. I will post my dyno Sat.We did several and I mean several runs.


Took the car on the road,turned off the ESP and the car did a 96ft burn out with both rear wheels locked to my surprise.The topend is scary and the car just pulls like a jet on takeoff.

We gained 20whp and 15 ftlbs of TQ.What a diffference just from changing the mass the car is getting plenty of fuel now.Not only that but the car was getting 300ftlbs of TQ as low as about 3k-3500 rpm's to the best of my memory.

Later on George raced his friends STi in my car. I will post the run in the mbworld kill stories tomorrow.Believe me it was a pleasant surprise.

E55Cent

Congrats Carl! I know you have put a lot of time and money into your car. It is nice to see the car running strong. Are you still going to do the Powrchip? Maybe you could save up some cash and get a first generation HPS blower for $3500 and put in a water mister. I know HPS has many problems with their new system but the old seems very simple and has had great results. Your car would be out of control.
Something to think about.
Keep up the good work. Let see how long it takes for you to get bored of your new found HP's.
Peace
Mario

ProjectC55

Thanks Mario! Wow I didnt know the HPS kit dropped to 3500.00.It's definitely something for me to seriously consider.As far as the powerchip I'm still thinking about it.

linuxfoo

Hi coolcarlskic43, congrats on your findings and its great to have a good mechanic who also knows what they are doing to recomend the right parts to change out. he seems very honest and knowledgeable.

BTW, which denos iridium spark plugs did you get, ik16? i bought some factory plugs from the dealer not too long agao and if the iridium is that much better i would also like to change mines out again.

ProjectC55

Thanx my friend! yes that looks like the part#.Just goto the Denso website to confirm.

ProjectC55

Mario when you did your dyno what were all your mods for the first run and what were your mods for your best run(310whp/323TQ)?by the way here are my latest results:It doesnt have my best which was 295whp/311TQ: