MindBend

I am interested in a 77mm upper for anyone selling.

Missed the reason for the resister in the cabin area....what's the reason for that ?

Denroll

I was just doing some troubleshooting/experimenting. It's not necessary.

Crissus

Thanks for all the Feedback. I'm very tempted to use it.
But there were other issues if i remember correctly? Something like a "cold start issue" and another one?
Are they solved?

kponti

Read previous pages???

Crissus

Yes, there was no mentioning about cold start issue anymore since Nov. 2013.
All the people are talking about is that the Hiccup Mode is gone.
If someone could clarify it would be awesome :-)

C_DirtyTwo

I agree, I think there needs to be clarification, maybe in a new thread about the issues the FSP had and how they were worked out.

kponti

Just a little addition. I do have the MAP error code from time to time ever since getting the 82mm TB installed. I also get a mild hiccup when driving at a constant speed for a period of time then I go to increase throttle ever so slightly for a hill. Goes away on its own and no problems come from it. These issues sound like the problems the FSP is giving to guys except on a much larger scale.

In essence I believe this is a TB related issue since the situation is worsened with the FSP but is present ever so slightly with the larger TBs. I never had any issues till I got a larger TB. I do not have a FSP as of yet, but I would like to have one and play with it.

Denroll

I'm still waiting on the newest MAP sensor to come in, so I can see if the hiccup fix also cures this cold start issue. It is much less problematic because the way around it is just to push my keyless go button twice (or key in position 2), wait about ten seconds, and then start the car. I do want to fix that, but the hiccup is still my main point of focus.

BTW, I tried a cold start when it was 100 degrizzles in my garage and the car started normally. I tried again on a different day when it was only 92 degrees and it had the cold start problem. Strange.

C_DirtyTwo

well you have to realize the difference in degrizzles and degrees is ½ x 32


lol degrizzles

Denis_E55

I ordered a 77FSP, Belt Wrap Kit & Tune Today. I hope to have it installed this weekend, will report back on what happens. Stock Intake & TB!

Denroll

Update: I installed the newest MAP sensor and loaded a fresh tune. All was good for ~100 miles, then I got the dreaded hiccup. Was disappoint. Car was running funny with idle all out of whack after that. I did the throttle body reset and then it idled super smooth. It's been about 500 miles since then with no hiccup, so I'm calling it a victory.

Denis_E55

How does one do a TB reset? What is the "hiccup" exactly? My car idles fine, only have a slight funny feeling under 2000rpms

RAWE55

If it feels funny down low you may want to tripple check that your resistor is connected properly into the clutch wiring harness. Get some pins and solder or crimp them on to make sure as it effects the power delivery down low when the ecu doesnt see the clutch engaged. What ddo you mean by funny? If you dont have a high stall you will get neck snapping punches under 2000rpm with the slightest tap of the throttle with the FSP.

Safe to say the Tune for the FSP has been nailed. I road tripped yesterday 200miles, up and down hills, WOT, traffic jams, i got it all with no hiccup. LTFT -0.8% B1, +1.6% B2. 2000 miles since my last retune. Happy to see DR has also resolved his hiccup. Its been a long time coming, alot of persistance has paid off! I guess Jerry from Eurocharged needs Tuner of the year award and Denroll promoted into leading MB technician in the U.S with his contacts in Europe pulling through with the upgraded map and the persistance to get it nailed so others can enjoy this mod also

Denroll

Throttle body reset:

-Clear codes with scan tool
-Unplug throttle body
-Turn key to position 2, wait 20 seconds
-Turn key to position 1, plug in throttle body
-Turn key to position 2, wait 3 minutes
-Start car from position 2

The hiccup can be described as a misfire or slight hesitation while just cruising along, generally under light throttle. After that, the on/off transition will feel really weird and the idle is usually like crap. Turning the car off and back on clears it until it happens again. If you are monitoring your fuel trims, you will see the STFTs go really high and AFRs will be scary lean.

Denroll

Oh, the funny feeling, like when it is shifting into the next gear under light throttle? Jerry and I are going to start working that this weekend. It was a back burner issue until I got the big one fixed. I get a "dip" in power right after the shift if I'm trying to drive like a normal person. It's starting to get on my nerves a little. During WOT though, all is muy bien!

Bramage

Well, I may have to try to find an 89 FSP. My 83 goes over-boost... Anyone want to swap an 83 for an 89?

Or I guess i could pop on a 180 lower.. SHure with there was an 86mm.. lol

Denroll, both our sig pics are OLD. We need new ones, and they need to look the same. You go first!

Denroll

Update: I've been working with Jerry on the shifting issues I was having; mainly the constant hiccup and the big dip in power after shifting during normal driving. He came up with a new tune that I have been testing and I think he's finally nailed it. Part-throttle shifts feel as smooth as stock now and I have not had the hiccup with the last several versions of the tune.

As long as you know, understand, and accept the risks of not having a clutched pulley and you have the cooling system to back it up (good pump & heat exchanger at a minimum), the fixed pulley is awesome.

blackbenzz

Glad Jerry was able to figure it out

What risks are associated and why did you choose to go this route instead of a crank pulley?

Denroll

I've got a 175 crank pulley. I wanted to go bigger, but those big wagon wheel pulleys make me nervous. That extra mass is just magnified by the larger diameter (moment of inertia, if I'm remembering college physics correctly) is a little scary. I had a smaller clutched pulley and liked it. Not being one to shy away from trying something new, I put on one of the fixed pulleys to try it out. I just loved the *instant* power, loss of lag, loss of the herky-jerky clutch engagement, and even the reduction of rotating mass. While it had it's problems at first, I just liked the way it drove and decided to stick with it. The only negatives for me now are higher IATs (~25-30 over ambient during cruising) and a slight hit to fuel economy. Risks would be not being able to de-clutch in an overheating situation, but I do have the Zeitronix suite and meth/water.

telpsicorei

Denroll,

Have you experienced any belt slip with the FSP and belt wrap kit? I have an SL55 with an 80mm FSP and belt wrap kit stock everything else (minus K&Ns) tuned from EC as well, but anything other than moderate throttle just makes a squeal and it just looses power... eventually it gets hot enough and sticks and the car takes off. Just wondering if this has ever been an issue with anyone before.

I've also got a P0107 basically low input to the MAP which I'm about to replace with a bosch MAP sensor 0261 230 191. Just one problem after another it seems like...

kponti

That's the problem I'm having with my fsp

Denroll

No belt slip here. How is your tensioner? Put a 17mm 12-point wrench on there and see how hard it is to de-tension. Mine is really stiff... and so is my tensioner.

Jerry was able to remove most of that big dip in power after the shift.

kponti

Hey Denroll did you do an adaptive reset via star in all this as you and jerry worked on the tune? Did that help at all?

1ForcedBenz

I've been running a FSP on one of my cars for a while now and Jerry's latest tune from the past few months has been perfectly ok here. The dip or power fall off after shifts at part load is there but only slightly in certain situations same as with a clutched pulley in my opinion it's just more noticable with the FSP. The early version of the tune made my car like a mad man at take off and would boil the tires non stop in sport mode from a stop light. Jerry's current tune is smooth as can be in my opinion, and have been threw multiple tunes for the FSP and my cars spot on. Also running an 82mm tb no hiccups. kponti weren't you having issues with your 82mm tb prior to the FSP?

Denroll

No, haven't done that.