PeterUbers

Time for nos

rs4 tony

Just saw. Da looks great. Weird.
OP. Our plugs on the GL slowly died and caused misfires under heavy load. High gear low rpm. With new plugs the car was transformed. Not sure how many miles are on your plugs but that may be an issue too. Felt like a new car afterwards(new plugs were from weistec)

Blacked out E63

100hp is alot to be missing. Hope this all works for you.

Blacked out E63

gaspam

mine did this too soon after getting tuned but my plugs were the original with 40K miles on them... sometimes new tunes can foul old plugs especially when its a canned box tune thats running rich for safety, but since the op got new plugs when he got the tune i doubt this is the case... plus the op did dyno at 541 whp on heartbreaker dyno which should be around 610 whp on dynojet which is right around where he should be for tuned..... so number for the tune on a mustang dyno seem fine....

just the track results are off, which could be the "driver mod" (b5 s4 audi joke)

kponti

I have yet to see a mustang dyno be near 70rwhp less than a Dynojet. In fact if anything Mustang dynos are a lot closer to Dynojets than say a Dyno Dynamics dyno

gaspam

if you were tuned for 91 oct (I am assuming you are in CA due to your track) then ecu is not going to adjust and correct that much for 100 oct, so your not going to get much of a power bump from it

also, looking at your timeslips, your 60ft launch is pretty bad at 1.8-1.9.... the guys that are running <11 sec are getting in between 1.6-1.7... get your launch down and you are at 11-11.2 ish....

but also your mph is way down...at your 11.4 you should be around 125mph, not 120.... but again, looks like its due to your bad 60ft times, as i compared your slip to a 11.1 @126 mph slip and rate of progression from 60 to 330 ft to 660ft to 1000 ft to 1/4 mile and your rate of progession from your 11.4 slip is pretty close, indicating you are picking up speed at same rate as a 11.1 1/4 mile car does, so the power is there, just your launch is hurting you

gaspam

70rwhp difference on what starting power level? lol if you are comparing the difference between a 100whp dyno pull and 30 whp dyno pull (70 whp diff) then that's a 70% drop!

the correction factor foir mustang to dynojet is is around 1.12 so 541x1.12 = 606... (for mustange to dyno dynamics it closer to 1.15x)

i had my e55 dyno'd on mustang multiple times at bip in atlanta at around 460 whp and dynojet in FL (525 whp) and pretty consistantly was 1.13x multiple difference given same hot summer conditions....


http://www.1addicts.com/forums/showthread.php?t=214597

sdg1871

My 11.1 time slip at Atco with Renntech tune and mufflers only. You should be as fast or faster than me.

gaspam

who should be faster, the op? what was your DA ? date and time ?

btw the 11.1 wasnt mine (actual non-rounded numbers were 11.19 @126.35) , it was my buddies and it was tune only so actually you should be faster then him since you have renntech tune and mufflers... for me, I still had my e55 and c63 at the time we went to the track

sdg1871

The OP should have been faster given that his car has the downpipes and I assume high flow cats or no cats and mine has the stock cats and downpipes.

The date of the time slip is October 7, 2015. The DA was somewhere in the vicinity of 1000 feet or above at the time of the run -- not a great DA for Atco.

gaspam

he's also on 91 oct vs 93 you get on the east coast... that pretty much negates the power he would pick of from downpipe.. you car and his should put down same hp given those 2 differences

your DA's are about that same only if you ran at 4-5pm at atco for that day, since the rest of the day DA was only 500-600

your launch is the diff (about 1.2/tenth sec better), as i noted before he is picking up speed (once he gets going) at the same rate as a 11.1 sec e63... just his launch sucks.... if he gets a >1.75 60ft launch then he should be close to 11.1 sec as generally 1/10th reduction in 60ft time = 2/10ths in 1/4 et.... that would put him pretty much dead even with your car, so i would say there is nothing wrong with OP's current results for the mods he has, given his bad 60ft times

Pho

I doubt its the plugs because its been install just for a few months by a mercedes specialist, which he torque to spec and triple checked his work

PeterUbers

How many miles on the car when you installed the tune?

Pho

The car was 2k miles when i had the tune done

sdg1871

That run was probably about 4 o'clock in the afternoon.

We tried launching the car all day to find the fastest technique. The fastest technique was simply brake torquing the car and letting the brake go when the revs hit about 2000-2500. Let it off higher and the car would bog

Race start was definitely not faster which was a surprise

gaspam

did you do the 1000 mile break-in period (never exceeding a certain speed/rpm) ? and the differential fluid change that comes at 1,600 miles?

i still think your timeslip is due to your launch though,,,,, go to track again, and brake torque instead of using the race start... ive never got near as good a launch using race start as i have brake torquing

gaspam

i agree with this and have confirmed it before with my vbox sport.... the race start function sucks on these cars

brake torquing was consistantly about 3/10ths of sec faster on 0-60mph vbox recordings for me.... race start pauses for a second when you launch just like as if when you do the basic mash the throttle method

PeterUbers

The problem is not his plugs

Thing is he was using same technique to launch before tune

gaspam

probably why his times were bad then as well.... need the time slips of before tune runs to actually compare...

also if track was same, DA same, weight same, etc? ... lot of variables need to be made constant to make accurate comparison of runs on a different day...

plenty of times i have gone to track with no changes at all to my car and run times 2/10ths to 4/10ths different.... just a change in weather, track conditions or bad launch can make a pretty big difference

Pho

im going to go the track in a couple of weeks and ill try this out. When i try to do launch with out launch control it felt weird. When i apply brakes and gassed it seem like it didnt even rev up at all.

Yes i did do the intial break in on the engine

Another thing off topic, when you do a rolling stop and u gas it, does it lag before it accelerates.

kponti

Any check engine lights? Even one that comes and goes?

Pho

nope, no check engine light or anything.

gaspam

brake torquing still lags on these cars but not near as bad as mashing the throttle or race start method

PeterUbers

Your off topic question

Yes. All e63's do this... It's the mct and it's slow throttle response

Normal behavior for this car sadly