alroumi

A/F ratio if you look at the dyno, its 14 and dips 0.85 down and goes back up to 14.5 which is too high.

LINK to dyno,

LINK to dyno https://docs.google.com/fileview?id=...YWNmNmUw&hl=en

Quicktwinturbo

That is way too lean indeed.. Perhaps ask Kleemann for new fuel map?

alroumi

We've contacted the CEO already, he gave the tech a couple of things to check like the MAF, becasue it dips so a new one is on order because the one on my car maybe faulty.

alroumi

I contacted Kleemann, they strongly point out that no new maps needed yet, it just acts like a bad MAF

betrezra

I presume fuel pressure stays up through the higher rpm like it should?

If not could be fuel pump, filter, pinched line.

Good luck searching for gremlins.

That's why this is done only at a good shop..... a shade tree mechanic would have already blown the head gaskets or worse on several WOT test runs at your local cruise spot!

alroumi

I'll wait for the new MAF and see if its still lean.

Newzchspy

New MAF wont make a difference IMHO. We've changed mine twice in a day with brand new units and all runs were within about 5 RWP of that with old and new MAF. Kleemann had told Chicago Performance the same thing, that it was the MAF. Interestingly, the Kleemann tune on the 5.4 engine normally runs rich and stays rich starting at about 3000 rpm and dives off the bottom of the chart toward 7,000 RPM. This was true of my car and Mikes. I think this is by design (the tune) to keep the engine from grenading if it leans out.

I say take her out and drive her and see what she feels like. Remember too, the Dynojet is normally lower RWP than all the others. I really don't think in your case its the MAF. If it is, I'd be the first to eat Crow!!

alroumi

Thank you for your opinion, hopefully all of this is taken care of by next week with actual results and conclusions to the lean a/f issue I hope.

superstar

Any updates yet?

blackbenzz

You rev yours to 7k? Is the power dropping off there?

alroumi

No updates, I hope we can get the issue resolved.

olie92

Hi Alroumi,

I ve just finished installing kleemann supercharger and header on my clk. Had the same lean issue like yours, a/f around 15. 2 things were replaced, 1) fuel pressure regulator, as one sent by kleemann was faulty, and 2) fuel pump. Also my ECU needed some adjustment and I ended up adding piggy back. Mine now working fine, power and torque gain is around 30pct. I am sure you will resolve issue with your car soon. Cheers, olie.

superstar

The Kleemann kit includes MAF clamp which contain an adjustable resistor (potentiometer). It is pre-set between 490 and 500 ohms. What piggy back did you install? and what for?

Newzchspy

Oh yes A, it does and power drops off right after 6,200

Remember too, I am not boosting like you big hitters who are running Kleemanns with 7-9 lbs of boost. I am looking to go to a smaller sc pulley though for may be 2 more lbs of boost.

alroumi

New MAF instaled, fixed out all the problems with the A/F being lean. It made 400whp and 412tq, the car is no longer lean. Here is the link to the dyno graph as apposed to the previous run which got me 366. The weather whilst dynoing was 38 degrees C and 4% humidity which is hot. I am sure in the winter with the cold weather it will put more power to the wheels.

https://docs.google.com/fileview?id=...thkey=CPz1__cB

betrezra

good conservative tune...... if you wanted to put in some race gas you have a few more hp/tq on the table.

alroumi

Thank you, I am running 98 Euro which is equivalent to 93 U.S. What brought the car down is heat, they drove the car from the dealership garage where they installed my modifications to the dyno which is 10 minutes stop and go traffic. It is pretty hot at this time 38 degrees Celcius. End of the day I am happy that the a/f is sorted out. End of the day 400whp is great for this kind of weather and basically the car hasnt been put much miles/km with the new ecu setup. So maybe when it adapts and the weather gets colder is will put more to the wheels.

TemjinX2

the 13 afr is a little lean at 4500rpm. You can probably get 15-20whp more power if you lean out the afr on the top end more. You can see at 5800rpm, the car is staring to make more power and it gets killed by all the extra fuel.

betrezra

AL - totally right!

I would redyno in the winter to see your non-heat-soak numbers, AND to verify good AFR with that cold dense winter air. Although I'm sure your tuner has it dialed in.

Notice how the power drops up top slightly at the same time it goes richer and richer...... then afr goes back up leaner, and power picks up again up top...... I'm thinking there's more in this combo with some more dyno time and a custom tune.

Still great numbers and bottom line for a street car a good conservative tune.

alroumi

Thank you guys, will be waiting for Kleemann's response. I've sent them a copy of the dyno, I am pleased since the leaning out is accomplished and its running rich again. I agree with all of your comment, I think they can get slightly more power but maybe its true or maybe not. I think the weather plays a vital role, will see what the outcome is. I also plan to get the K3 which consists of the camshafts and also I want a Quafie LSD.

betrezra

So how do you like it? Can you tell a difference? he he

alroumi

I am out of the country, will get back in a weeks time

betrezra

Ohhhhhh killing me! Get home soon and burn some rubber!

ABALONE

Congrats on getting the car to work! Now get a bigger heat exchanger and separate the IC cooling with a separate expansion tank on the driver side and let the water flow from side to side through the HE. Stock Kleemann heat exchanger system is actually not such a great system, a lot to improve there.

// Magnus

alroumi

I will test the car out, see if the cooling is adequate and if necessary I might go for a larger HE with the separate cooling.