gaspam

just got my car retuned for downpipes at RT to remove the check engine light for catless downpipes. was suprised when they said they actually dont change anything in the tune for downpipes other than turning off the rear o2 sensors to eliminate the check engine light

anyways here's my dyno below... was about 90F and 65% humidity so not best day for it, but they had a stock e63-s in there too and ran it as well and put it on my dyno sheet for comparison... looks like my RT tuned/ speedriven DP was about +86 awhp/ 183 awtq vs the stock E63-s

from what i have seen of renntech tuned 2014 e63 awd dynos mine is about +20 awhp/+40 awtq so i think that's the delta for catless non-turbo back downpipes on my car

Exotic-metal55

Nice power! Makes sense on Rt just needing to adjust for cat removal and not fuel with adding mid pipes. I know RT and other tuners do change tune for the full turboback kits on the market but the requires changing the manifold off the turbos well.

gaspam

thanks! they told me their dyno runs a little low and that if they ran in STD correction it would run about 4% higher as i told them i saw a few tune/dp M157's running ~620 whp and they said they were probably in STD correction vs SAE (what mine was) and sure enough went back to find those ~620whp dynos i saw and they were all STD correction, so i felt a little better not hitting ~620 awhp in SAE mode

Gene Gorman

Very nice. Renntech has been one of the best for years. I have one of their early biturbo tunes on the wagon.

Gene Gorman

Very nice. Renntech has been one of the best for years. I have one of their early biturbo tunes on the wagon.

Zod

so a stock e63 s was 513 and you were around 600... not bad for a tune downpipe car. congrats, please let us know who she holds up for us AWD guys

efiftyfizzle

Those are great numbers! Good gains for just the catless non-turbo back pipes.

I wonder what the turbo back pipe gains would be now.

PeterUbers

Nice, how's it feel?

Pumpkinate

Great result. I just got turbo-back downpipes and a tune for my CLS and it feels and sounds devilish. I haven't re-dynoed it yet so not sure of the power and torque gains.

gaspam

yep stock e63 s was 513... and ive actually had my car tuned since last sept, so been holding up fine, this was just retune to turn off rear o2's and finally get it dyno'd

the dyno tech told me that on that dyno they are seeing around 580 whp/ 640 wtq normally for M157's tune only and they were actually surprised that the catless dp's gave me that much gain up top vs tune only numbers they have been seeing so that was good

gaspam

its definitely stronger, especially when rpms are low just cruising and then punch it to take off... power is a little more instant in that situation now ( lag from stop is still there but i expected it to be)

Gene Gorman

My tune was done in 2013 and no problems with it. It shure is fun in S+.
Renntech's early tune was 701hp and 839 ft. lbs. tq. They stopped doing that tune as some areas don't have 93 octane gas. Was done with colder plugs and filters.

BerndV

Is this the intermediate or full RT tune?

gaspam

full tune... renntech told me mine was a strong run as most of their full tune dyno runs are hitting around 580 awhp/640 awtq on their dyno... mine has mid-pipe style downpipes but they dont think it made up the 20whp difference as they have not seen much top-end pickup in hp from dps