I’m stage 2 stock turbo with upgraded intakes, catless downpipes, tuned on 101 octane race fuel.

60-130 7.3 to 7.5 on average. Thought I’d be faster given I’ve beaten dodge demons and m5/m8 from a roll. Maybe it’s the area / DA? What are your guys experiences

 

stock turbos, stage 2, catless downpipes, zac intakes



lately I’ve been running 8.8-9.5’s, something is wrong with my car, I’ll figure it out when I come back from outta town

 

*****OMG, yes something is not going right in your car. Those mods with a decent tune should be 1 second faster, mebbe a bit more with good weather and a non-heat soaked car. You think you might have slippage at the transmission, or perhaps excessive knock retard from a lean cylinder or two from an injector not properly spraying, etc? How many miles on the car, and how long has this been going on for? What is the cars *best* 60-130 time on Dragy?

Enough spark knock retard can of course cause your problem, but also break or damage the insulator on spark plugs, leading to a whole cascade of issues.

The car run smoothly otherwise? Do you have scan tool data? A decent scan tool with real time logging can spot a LOT of problems and narrow things down.

 

*****IME you're doing good assuming you are in a full weight car. There are guys who are faster with stock turbos, but they have mebbe spent some time dyno tuning versus perhaps just a regular tune without adjusting for the individuality of the setup to verify they are getting faster from various mods versus staying flat which sometimes happens due to improper fuel trim adjustments, or stupid stuff like weak wastegates leaking boost, or a bad spark plug, or weak coil pack, etc.. holding back the car from its full potential. Race gas can help a LOT of course but the stock turbos just peter out and heat the air excessively somewhat negating higher boost levels at the higher rpms. An experienced tuner with a dyno can maximize your tune for race gas depending upon your goals. Otherwise, it is mostly a very educated guess, based upon experience, but it is still a guess. It's complicated getting the last 10% of performance out of the car, and sometimes quite expensive for the last 5%. Stuff breaks sometimes, and it gets expensive quickly on these cars.

Some mods don't really seem to help all that much until you get to a certain level, and then they can help A LOT if that is a bottleneck from other enhancements that have helped open things up. A decent intake system might only be worth 5HP overall on a bone stock motor, but (really) 80-100HP on an all out modified setup with race gas/meth, and a very aggressive tune. I've seen this on other platforms when we removed what seemed almost stupidly inconsequential (a nice intake with free flowing filters that are clean and help smoothen out the air into the turbos or through the MAF's or to reduce inlet temps, etc.. ) . On a stock setup it was no big deal, but a crappy intake or major turbulance over the MAF'(s) caused all manner or problems that just killed performance (this is on a 10 second car, not like moms 19 second quarter mile minivan with the baby seats and cheerios on the floor in the back..)

60-130mph is a good measurement as it doesn't require as much expertise in terms of launch like a quarter mile or 1/8 mile run where 60ft times, and traction are *huge* in terms of performance. A decent driver with experience can easily knock off 2-3 tenths in a 60ft with some experience, and it is remarkable how much better the car goes by getting into its proper torque band and just staying strong for the rest of the distance. Your times, assuming you listed all of your mods is respectable IMO. Others with more experience on this platform may chime in.

Low 7 seconds for 60-130mph is very respectable in real life on the street with presumably a car that has not been prepped (chilled, etc..), and if it isn't like below freezing outside where turbo cars like ours can feel like they have a whole bunch more HP due to reduced IAT temps, etc.. There's mebbe a bit more performance you can wring out assuming the car is in decent shape, but it will take some tuning time as well as verification main systems and ignition, transmission, etc.. are healthy, etc.. Everybody assumes their car is in *great* shape only to find out something like a loose spark plug or leaking wastegate on ONE turbo is killing off 20-30HP, or more and just adding more and more stuff on the car is just masking the weak link that *should* have been corrected earlier. Good luck.

It's all fun and games! (expensive games...)

 

Adding modalworks intakes next week but below is my best on the setup in my signature (basically stage 3 on 93 pump)

 

solid 60-130. I’ve beaten huracan, m5, m8, and dodge demon from a roll. I’d imagine you’re probably dusting a lot of people too.

I usually just let the car warm and run up the 241. Full weight. 1/4 tank of gas. Punch it at 45-50 and just go. Might look into turbos next. I have modalworks intakes and love them. Your car is 2/10ths faster all the way up

 

Thanks, although mine should be faster on my current setup. PTG1000s, catless DPs, high flow filters on a 93 tune. 2nd gear start, 45mph, T/C off, 295 PS4S rears

Even with stock intakes, I would think I’d be high 6.x; will have to see what MW intakes do and then get some data logging done. Feels like something is missing in 4th gear.

 

Nah I just have an Veepak OBD reader and use OBD Fusion to scan the car. Doesn't read knock though. I gotta get a proper diagnostic scan by a local shop to see if there's anything off. I have about 42k miles and its been going on for a few months. Been 78-82 degrees with 70-80% humidity when I use my dragy. The car runs smoothly I feel, 210 oil temp and 178 trans temp. Sometimes there's a small "skip" or "jump" in the revs on idle or whatever you call it.

The OBD app can log some things and DataZap website can put it all into a graph/table

Here's 2 of my 60-130 runs:
https://datazap.me/u/travyc63s/apr-2...11-13-14-23-26

 

This is my best 60-130mph Dragy time, 2015 C63S Sedan w/ Pure 800s on 93 Octane, no meth.

 

What kind of times were you all getting when stock?

 

I think I read somewhere on here between 9.8-10.5’s

 

I think we somewhat discussed in another thread but those are some seriously impressive numbers for your mods and fueling. I would assume your environment was a large factor in that level of performance (looking at your DA).

What tires & sizes are you running? Pressures?

I think you are running modalworks intakes as well?

Good stuff.

 

The Demon did not know how to race ... they run in the 6's for 60-130 mph!

 

Hi

The low DA definitely helped but the low temp hurts traction which adds to the time. I’m running PS4S 275s in the rear. I had the tire pressure at ~35psi hot from what I remember. Yup I have Modalworks intakes also. I’m running a custom tune from Jerry (Eurocharged) based on back and forth HPTuner logging and loading new adjusted tunes adjusted by Jerry. We went back and forth a several times until we were both happy. Car runs like a champ, It’s my daily driver. Zero issues, no drama. Just fill the tank with 93 and drive as hard or as calm as I want.

Another good way to compare performance is looking at the 60-100mph times. It’s part of all 60-130 Dragy runs so you can compare to other 60-130 dragy times. I was hitting 2.8x/2.9x consistently which lines up with a low 6 second 60-130 pass. It’s not perfect but gets you a ballpark idea of how you compare and it is safer and you are not hitting go to jail speeds. Also you can do it on a shorter stretch of road. You can set it up under custom settings in Dragy.

For example here is a 60-100 pass I did the other day (had some wheel spin so I probably could get closer to a 3.0x-3.1x if I had a cleaner pass, my best passes were in the 2.8x’s in colder weather)

 

So I just installed modalworks intakes this week and tried a couple of 60-130 runs. Keep in mind, it is ~100* in North Carolina right now, so I would not be surprised if the car is pulling quite a bit of power (the butt dyno is telling me that too).

I was only able to run an 8.3x which is over a second slower than the previous run I posted. Now, that previous run it was 46* (so not like-for-like) but I couldn't imagine the car would be that much slower - especially with upgraded intakes.

I also installed the CSF 3 piece cooling radiator kit since the 7.1x run, so I think that would help too. I'm seeing 215-220 engine temps and 195-200 transmission temps. Maybe my coolant levels are low? Anyone running water wetter in their cooling system?

 

Hi

Do you have HPTuners? Need to log to see what is going on. Can you log with the PTG tune loader, Verstand? More than happy to take a look if you have any logs.

Jeff

 

Went for an early Father’s Day morning drive, got a 3.14s 60-100mph this morning in full comfort mode 😎👍

(Forgot to change the drive settings before the pass)

 

Apparently Verstand Tuning Suite via PTG can do some type of data logging, but it's not 100% clear.

When I am WOT and go 3 -> 4, the RPMs quickly go from 4.5k to 5k but then drop back to 4-4.5k and then starts pulling. SEEMS like there is some type of hesitation. Fairly confident it's NOT wheelspin, and don't think it's the clutch slipping.

To your point, need to do some data logging. Appreciate the offer! Will let you know how it goes.

 

Heat soak?

 

plays a factor but not for this issue. Happens in lower ambient temps too when the car is in optimal temp ranges.

 

same here, it’s puzzling TF outta me

I’m almost 1.5 seconds slower

so frustrating as theres like 20 things in the engine that it could be

 

When did you last replace your spark plugs?

What are your boost levels when doing a 'cold day' vs a 'hot day' pull?

Have you gone to a dyno to check your rwhp, rwtq, afr?

 

All good questions

• Replaced my spark plugs with HKS 1-step colder plugs about 4k miles ago, gapped to 0.26 (at the recommendation of PTG since I'm running big turbos).
• TBD on boost levels - don't have visibility into that. Any thoughts on how to get that (other than data logging with PTG in real time)?
• I haven't done any dyno yet - was using 60-130 as my measure of power. It's certainly on the list of things to do.

I am wondering if it could be torque management related and I just need to get a TCU tune. I am just not in the spirit of throwing thousands of $$$ at an issue without know the root cause haha

 

You NEED Data Logging software, or you will just be wasting money chasing this .... it is the cheapest way to find the issue!

 

hptuners is pretty easy to use to log. Some tuners you can just use openport 2.0