Exotic-metal55

Has anyone had their REV limiter raised and trans shift points raised? Line pressure increased? I assume Rev limiter is done in the ECU and shift points/ line pressure coded in the TCU?

If so, by whom and thoughts on the results?

Any 55`s running aftermarket torque converters yet?

Exotic-metal55

What? No 55 has had this type of tune done yet? Not even a little wilder converter? Not enough CODE breakers around yet???

Don`t we have the same tranny (NAG1) 5 speed those Chyrsler thingy`s run/drive?

armadillo

I think if you did a search of the ECU tunders you would see a number of results, try Renntech, Kleeman, Veloce, LET, VRP, powerchip, ECU and it should come up/

jangy

Mine, but only from ECU. It was done by Vadim and Jeremy at powerchip

Exotic-metal55

What are your shift point RPM on the 1-2 and 2-3 shift now? High high is the rev. limitor set? Both these adjustments were or are included in your tune?

jangy

Yes they are part of the tune. Once they figured out how to bypass the TQ limiter, the car had lots more power but was shifting at some crappy spots. After about 3 or 4 renditions, the car is now fairly aggressive, although i know I still need a TQcoverter and TCU upgrade. The rpms slap 7000 easily. I think they gave it 400 extra revs, but not sure. As far as shift points, I didn't mean on WOT, although that as increased. What I meant is the input that the car looks for in order to think that a down shift or up shift is needed. When they first tuned it, the slightest of throttle inputs and the car would drop 2 gears and be screaming along. That is great response IF I were always racing but i am not. It took hours of datalogging and feedback to get all of those little things set. I will be going back for a final upgrade (ecu) as soon as my cooling is done.

E55 PWR

speed tuning USA raised rev limit on one W208 CLK AMG to 6400 on the M113 and it runs fine. thats NA though, FI is different story. Still M113 can take more power but theres really no point in increasing it on forced induction.

ChicagoX

Without corresponding breathing mods, the 55k motor runs out of breath top-end. Bumping it up in second does put you more in the 'meat' of the powerband when it shifts into third, however.

Every gear has a different limit cutoff from the factory - mine was adjusted up 300 RPM in first, 400 in second and third, 300 in fourth, and 900 in fifth by LET.

ChicagoX

That sounds more like the tranny adaptations than anything else.

Unless your TCU is being modified, NOTHING besides shift points is changed, AFAIK, and that is done through RPM limit.

splinter

Would you kindly extrapolate its velocity for us?

jangy

Hold up, I am not talking about shift points under WOT. That is easy. i am talking about in regular driving. You can have the car shift down with the slightest of throttle blips or you can have the car wait for a particular load before it shifts down. The car comes set, based on OEM setup. The added power and mods make the inputs exaggerated and so the tranny will act up if all you do is engine tuning.

Dunno what LET is up to but MB has two separate governors on these cars. the rev limiter simply makes sure the car doesn't over rev. The speed limiter is for top end.

Exotic-metal55

Agree on the run out of breath but you still can gain more ET by raising shift points.. This applies mainly to the 1-2 shift and 2-3 shift (early momentum). Mainly 1-2 shift.. For example: If you have peak HP at 6200 rpm and shift at the same RPM,, the RPM drop on these stock converters drop you way out of peak HP verses going up 300-400 rpm. This can keep you in a lot higher (above the curve) HP average.. That is why I am asking,, as I have not seen any tuning info on if shift points ARE or CAN be adjusted at WOT!



The adjustments were made at WOT? Your 1-2 shift at WOT is close to 6800 RPM now?? If so, that is good news..

Cylinder Head

iTrader: (1)

Look at a dyno graph for an M113, they die above 5k rpms. No use raising the limiter unless your car is fully tuned with SLR coolers.

Exotic-metal55

I have looked at plenty of m113 dynos.. Here is one without SLR coolers and it would do well with shift points raised..

https://mbworld.org/forums/showthrea...ight=dyno+m113

For example above:: If this motors RPM`s drop to 4000 on shifts,, he will lose ET and not stay int he sweet spot.

The Question was: Who has raised shift points?? I am looking for information on this area for the mods I plan to add. I did not ASK or SAY on a stock M113 or even if it was on a modified M113. Just wanting to discuss the info.. Is that OK on this forum????

jangy

It is, but I think you are confusing us. Isn't the shift point on WOT the redline? That is how you control it. I don't know of any automatic car that short shifts, and that would only save gas and not add power.

CH: more revs ALWAYS equal more power. No SLR coolers needed, just lots of air. Like exotic said, you don't want to be on the weak side of the peak especially in a five speed. My power peaks before I shift but that is fine, because I am always at minimum 80% power. If I left it as was, I'd keep having to SLOWLY creep back into screem zone on each shift.

Stock power peak is at 6100 and the rev limits at 6500. You drop to about 5800 each time, which is again on the weak side. i'll take power loss on the strong side anyday since you already have momentum up and running.

ChicagoX

There is a speed limiter in each gear, along with the rev limiter.

It's fairly obvious that you don't know what LET is up to. Right now, my car is running two switchable tunes, for instance.

Simply incorrect. Heads/cam selection plays a TINY part in the whole thing.

Try driving your car again, report back. If you fall to 5800 after the shift, I'll eat my shorts.

ChicagoX

A bit shy of 200, theoretically. IIRC it was 197.xx on paper.

jangy

My car shifts at just over 7000rpms, so your shorts are safe.



You are such a cutie pie. When have i ever claimed to be a technical expert or certified MB knower? stud, I am simply an enthusiast that loves to learn about cars and chew the fat with others that car about secret COMAND menus and the such. I've been here long enough that EVERYONE knows what I know and don't know. EVEN IN THIS THREAD, I gave OP props for challenging my knowledge and helping me correct or fill in the gaps. What is it you wish you could prove? OK, lets say I was wrong on something (if it ever happens ), so what? I'm just Jangy. That's it. I'll still be Jangy then. And if you wanna get into a nice bash off, then start a new thread and I'd be happy to show you why tey call me Jangy. Leave other people's threads alone.

ChicagoX

It's not up to you to tell me where to post, thanks.

You took an uneducated swipe at the folks tuning my car, and posted misinformation - expect correction.

Who cares why they call you Jangy....with 112mph traps, you are the last person to be chiming in the performance threads.

jangy

HAHAHAHA!! Oh, you are so funny. Good one. Maybe I don't have the speed limit set properly in each gear? Perhaps LET can help me with that? LOL!!!

Post your dyno run and A/Fs and lets see what LET did. It is that simple. i wanna see what your car does past 4K rpms. You scared?

ChicagoX

There is a different rev limiter in each gear. 6500, 6700, 6300, 6300, 5500 on the 2003s, for example.

jangy

OK, now tell us about the SPEED limiter in each gear? Come on...

ChicagoX

If you are only running 112mph, they can help you with a lot of things. Remember, they do their own tuning.

My A/F is about 12:1 across the board on the street and at the track, a bit richer on the dyno.

I think 11.59 on street tires should be enough for you. I don't see many fake track times, unlike dynos.

jangy

Go read my posts and show me where I disrespected LET. So what if each gear is set at a different rev limit. You think I didn't know that? LOL, you are cute. That is what all of this is about, huh? You thought I said that it wasn't the case? Dude, your hatred is just whacky. Reminds me of those Southern white boys back in the day. Lets just agree to disagree and you do whatever you want. Ain't a damn body buying LET copies of anything.

jangy

You may not call them fake, but comparing numbers from one coast to another is DEFINITELY less controlled than dynos, not that I am a huge dyno fan. I like side by side races, especially for the money. None of this: here is my best trap ever. Here is my best 60 foot ever. So what? Your 11 whatever is NEVER enough for me. I hope you know that ALL the west coast guys take ALL of your talk with lots of salt...