White C400

Not much if any that's 1 thing the c400 lacks is a good sounding exhaust note. Gonna try for exhaust by spring.

oldman&theC

I agree with your logic on the 33 HP increase on the 450C,but maybe MB is being conservative on the actual increase.It would't be the first time a German manufacturer gave out uderated HP numbers.Look at the BMW 335I rated at only 300HP.

White C400

Yea possibly will just have to wait for those time slips. Cajun1689 was suppose to run his yesterday.

l3it3r

I have to be honest, after driving a C450, I'm glad my car doesn't have the same exhaust. Personal preference, sure, but it's just too noisy IMO.

White C400

How did u make out at the track Sunday.

cajun1689

13.038 at 109 I think I wrote up a blog post on the site with all the numbers.

Find it here

oldman&theC

Your 60' times are not good enough to get under 13 sec.You need to be under 2 sec for 60'.Were you getting a momentary hesitation at the start? Did you have the ESP turned off and in sport+ mode? My 2 runs with my test equip gave me 1.92 & 1.93 60' times.When tested at the drag strip my 60' times were within .03 of the strip timer.

cajun1689

What equipment were you using I would love to get it for testing and it was my first time at the track. I'm sure I could do better with more practice.

oldman&theC

I am using a Passport GT2 timer. I don't know what their latest model is called,but there are several other good timers for less than $300.

Did you have ESP off and were you in sport+.You should also shallow stage,creep very slowly until you barely turn on the second light.If you deep stage,by driving 8" or 10" into the second light,you could lose as much as .2 sec in ET.

White C400

This was my run on my tuned c400.

White C400

Nice run good trap speed

sliqdaddy91

Interesting...perhaps work on your driving and try again.

What is also interesting is that I recall reading earlier on this forum that a C400 with a JB4 tune from Burger Tuning did 113 mph trap after trapping 108 mph stock.

Granted this was with a g-timer like data piece that the Oldman rocks.

Time will tell how these C450s run, with the extra hp from the factory and the different torque split + and suspension goodies it should be a bit faster than a C400 with the same performance modifications (or stock vs stock for that matter) so we as a community will have to wait what other tuning companies put out.

Thank you again Cajun for at least trying out a new tune and a new car on the track even if it was your first time.

White C400

Yea G-timers are way off on trap speed there was a renntech tune with G-timer also that said 112mph. I don't see anyone traping over 110 max. I do think with a good launch the c450 can dip in to mid 1.9's 60 foot.

uptownman

I'd like to see how this goes with the C450
When I took my 2015 C400 4matic to the local track, it ran the 1/4 mile in 13.200 seconds at 105.54 mph. 0.055 reaction time. 2.013 60ft. Totally bone stock.
Basically I disabled traction control, put it in sport + and that was it... A/C was off also. I have the sport suspension, non-airmatic.

oldman&theC

I don't find this to be true.My GT2 timer was within .5 mph of the trap speed at Maple Grove Raceway.On some runs it was slightly slower than the strip timer and on other runs it was slightly faster.If you look on Dragtimes site under BMW 545I,the second fastest time under "grogan 545" is mine.My GT2 timer on that run was 103.0 mph,and the ET was 13.59.If you don't follow the instructions on the GT2,you may get some crazy numbers.The original version of the GT timer did have accuracy problems,but the GT2 has proven to be very accurate.

oldman&theC

Good numbers C400,if you look what I posted they are very similar(slightly faster).The weather was much better during my test,45F and very low humidity.None of my numbers look funky and closely resemble what you would expect at a dragstrip.

White C400

I don't think ur numbers are that off just I've seen g timers say high trap speeds to reach 112 113mph in 1/4 our cars would need at least 420hp to crank.

White C400

The 13.2 at 105.54 do have the time slip just would like to see all numbers.

oldman&theC

I have never seen more than .5 mph off from drag strip timer.Tuners are inclined to show the best possible results.It is in their best interests to do so.You can skew the results on the test equip by set up.I have no proof this was done except when you see results that don't make sense they are probably wrong. I am not sure at this point if any of the available tunes are an improvement for the 450C,time will tell.

sliqdaddy91

I do think these piggyback systems won't yield the results of a true ECU flash. I could be wrong but I don't plan on modding this thing until a few vendors come out with actual flashes of the ECU and the gains shown.

White C400

I was a little nervous getting my tune done being I was pretty much the Ginny pig but I heard nothing but good things about AMR performance if your looking for a tune for c400 or c450 I'd give them a call there located in CT. I was def happy with my tune results

uptownman

That's the time slip... Was my 1st & best run... <br/>2nd run was 13.27 @105.6

oldman&theC

Your results on the c400 are certainly worth while,but I don't think the same tune would be of much improvement on the 450C.

White C400

No I agree don't know if they have advertised gains for c450 yet at AMR. I know the intcooler is very small on c400 not sure if the same one is used on c450. Whic h limits the power gains also restricted exhaust but I'm sure the c450 which has a better exhaust can get more power. Renntech advertised 402/ 454 but I think that's with high octane 98 Ron Euro.

White C400

Yea 13.2et is the fastest I've seen for a stock c400 that's real good.