SICAMG

Is it the TCU that controlls engine rpm.? DTK sells them and says that limit is raised to 6,700 but not sure if it is a ECU/TCU combination that does it or TCU alone. I cant get a straight answer from him.

oneslow55

If you can't get a straight answer from a person making and selling there product what does that indicate then?

Yes the tcu controls the shifting points (rpm of the gears) 6,700 is a limit not the greatest but ok .The major limiting factors when revving past stock rpm points is stock cams and the crappy stock blower which falls off the more boost and revs you throw at it

Redwood415

the increased rev limit will get you minimal gains and over strain blower and internal components. M113 is not really a hard revving motor like the M159 6.2L motors (those motors thrive on revs) E55 is a big torque motor that really doesn't like being bounced off the rev limiter. My 2 cents.

oneslow55

After 5,400 rpms that stock blower is done like a burnt toast.First thing i hated about this car was the charger unit it's made for fast tq that's it.

shardul

iTrader: (1)

I have seen videos of DTK showing off his TCU unit and revving the car in park all the way past 6k rpm.
Damaging and useless and senseless to rev the engine without any load on it.

Hulk

Why anyone would put his parts on this car is mind boggling

oneslow55

Hulk to be really honest his tcu was luck it either will be great or crappy .Taking that chance is not good in my opinion

Hulk

Ya that's not good odds
Anyone that uses his parts or tunes shouldn't complain when they lose a transmission or motor

oneslow55

Kinda hard to looose a tranny due to the tune being weistec ,but the engine I agree 300%.Drove a dtk v2 tcu actually was veungood and then drove a other one and let me tell you it was horrible!

SICAMG

All good points !! Just asking that's all so good to know.

Hulk

Too much line pressure on tcu is not good for longevity of the transmission and how high that pos tune revs is crazy
Yes it a stolen tcu tune and most probably stolen ecu tune

SICAMG

Well really its to bad. 300.00 for a tcu tuned outright ?? You cant go wrong .......if it was any good.

PieRat

I have a "weistec v1" tune I bought off New Zealand's version of ebay. God knows what it really is. I find it pretty much the same as my stock TCU and do not notice any change in shift points. I actually record higher top rev's in torque app on stock but maybe that's because it shifts sooner. The poll rate on the torque app is rubbish too so maybe that has an influence. Manual mode rev limiter is the same in both. I am very interested in what part the ECU plays as my first gear to second shift is so goddamn slow half the time. Especially noticeable at WOT after a kick down feels like the engine throttles itself prior to shifting, letting all the enemy cars past.

oneslow55

Like I said hulk , the v2 with the 6700 rpm limit was good the v1 was a total pos !Now again, his tcu are hit and miss it's either great or crap..If your lucky to get a good v2 you scored if not, then it will be trouble and headaches .

Hulk

Just because it revs higher doesn't mean it's faster.
Anyone have time slip diff?
Nope

oneslow55

200 rpm is good at times helps keep the car higher then the power band more .as far as the slip your not going to see one just like ported heads so called makes 45 whp

Hulk

Lots of cars ran 10s with no tcu tunes or just removing tq limiters

Ported heads do help but you need cams with them

oneslow55

Many think there going to gain 65 whp with heads and cams ,no way!!!its not a ls1 setup ,Amg heads flow very good from the factory and little room for improvements to be had .I like a 03 tcu .

Hulk

03 is good but paddles only work in Manual
I had one got rid of it for an 04

oneslow55

I just checked mine it's a 04 ...was out a late 03 model..But yes my buddy used a 03 and the paddles work only on that mode.

99lightning

went to stock shift points with my gears, works way better