B7 RS4 Apr tune dyno comparison

B6/7 S4/RS4
#1

All results from the 034 motorsports mustang dyno in the past 2 weeks

  1. Bensti
    Stock tune
    full ebwerks catless 2.75 exhaust, recently carbon cleaned
    328 WHP

  2. Bensti again
    APR 91 tune
    full ebwerks catless 2.75 exhaust, recently carbon cleaned
    325 WHP

APR tune nets -3 whp?

  1. Max from qw
    Stock tune
    Stock downpipes
    AWE cat back
    Fresh carbon clean
    329 WHP

  2. Meem
    APR 91 tune
    Stock downpipes
    AWE cat back.
    CC 5k miles ago. Checked carbon this week. Said hardly any. Dyno this week as well…
    327 WHP

APR TUNE nets -2 WHP?

Arin mentioned this week that adding exhaust modifications (decat, better diameter dp and cb) to these cars doesn’t add peak WHP. I found that weird because every dyno we have seen shows the opposite. With the exception of the APR tuned dynos from the past 2 weeks.

From the looks of those he is right…with the caveat being that adding exhaust in combination with an APR tune doesn’t add peak WHP. Or for that matter adding an APR tune doesn’t add peak WHP fullstop.

#2

So I guess the follow-up question is what other cars have dyno’d at 034 over the same time period. Maybe something happened with the calibration on the machine?

#3

Unless the before/after and tune install was all done on the same day, in which case that really doesn’t look to good for the APR tune obviously.

#4

These are the only ky ones we have heard of. It’s a new dyno. We have loads of data from the old 034 do I but it’s useless now. Totally different types of machines. Land and sea vs mustang.

Jhm usually uses that dyno (but doesn’t share results).

#5

These are ALL on the new dyno in the last 2 weeks.

BenSTLie results were same day.

#6

Would love to see the full dyno graph.

[/ Captain Obvious]

#7

It’s odd too that BenStlie’s full cat less dyno was nearly exactly the same as a stock DP AWE catback car.

#8

Agree it’s interesting to see that there’s no power increase from just 2.5 AWE catback to 2.75 EBWerks fullback… So the question is why would someone buy a tune if there’s no hp increase?

#9

You mean the APR tune? Good question.
Nothing has ever been shown proving any performance gains from the APR Rs4 tune. What we have seen is a dyno or two from APR themselves and these ones which show 0 gains. Losses in fact. So I’m not sure why people buy these tunes. Stay stock until someone shows you there is a meaningful reason to be tuned. Simple.

#10

Someone asked me if we have any JHM tune information (dynos) for the RS4. Only one I’ve seen…

1. Mistro
stock tune
stock downpipes
stock catback (but with resonators deleted)
not recently carbon-cleaned (over a year/15,000 miles)
hot, shitty temperatures, running on 94 octane
327 WHP

2. Mistro again
JHM 93 tune
JHM catless downpipes
JHM resonated catback
not recently carbon-cleaned (over a year/15,000 miles)
hot, shitty temperatures, running on 94 octane
365 WHP

JHM tune + exhaust nets 38 WHP

#11

Sakimono, you are assuming Ben has a ebwerks exhaust. If he did, i’m not sure why he is inquiring to purchase one… :o So lets post facts.

#12

because he said he did. That’s all.

#13

Did JHM ever did into Dennis’ car? Does he have a ton of carbon build up or something?

#14

Denis?

Don’t know. I’m sure it is fine. Why do you think it has tons of carbon buildup? Interestingly when he was stock he dynod 265 somewhere out there (not 034), and when he added full catless ewerks dp/cb with no tune, he dynod 280 on that same dyno. With jhm stage 1 he made 390, different dyno (034 this time).

An rs4 with Jhm tune and full catless jhm exhaust on a normal dyno should see 360-370 (we have seen 3 or 4 of these results, Dan, jlifschutz, mistro, mickf29) , and jhm stage 1 sc should dyno 425 or something. Denis was around 390 whp at 034 mustang . That was with cats. That was also with ewerks exhaust, not Jhm. So at the end of the day he is right where he should be. He is making 60 whp more than every other rs4 and rs5 to dyno at 034.

#15

Why would they? We already went over this.
http://audirevolution.net/forum/index.php?topic=2334.0

JHM isn’t going to freak out over idiots making a big deal over a dyno pull, we keep asking this, but when has JHM ever cared about a dyno?

If Denis is unhappy with his results then he should reach out to JHM, but before he runs back with a dyno sheet and a sad face… he should probably run side by side with the other cars that were there that day. Better yet make a few passes at a drag strip. JHM doesn’t promise anyone XXXwhp/ wtq, and instances like this “dyno freak out” are why. They promise reliability and performance.

Have we seen anyone complain of JHM products not performing? I, like a few others, have been on the dyno for my own interest. Stock base line, then full exhaust/tune just to see what gains I picked up. I was more than happy with the results. I then showed the performance was also apparent in the 1/4 mile. We are comparing different cars with different mods, tunes, etc. on the 034 dyno. I don’t think Denis even had a baseline on that dyno so his fun dyno day run means nothing truthfully. He also had a hot ass RS4 engine with a blower strapped to it on rollers in a room with probably little to no air circulation. Do you know what happens if the IAT are hot as hell on one of JHM tunes? if it pulled power then that is a good thing.

/end rant

#16

Yeah the dyno for a non intercooler car is not exactly ideal.

By the same token, Dan could take his intercooler stage 2 rs4 to that dyno… And put ice in the reservoir, creating IAT that is well below ambient, and dyno something ungodly compared to the other guys. That too is a useless piece of data.

At the end of the day we all buy our cars for performance gains so the dynobsheets are kinda irrelevant…although we have 0 (zero) performance data from literally any other tune over here.

All we have other than JHM and stock are a couple of passes from an MRC car in the UK.

#17

Forgot about how low he originally dyno’d. I don’t really care about dyno numbers to be honest was just wondering. I thought you had said they reached out to him after that but I may be mistaken.

#18

I can personally confirm, from my own testing, that a super high IAT/heat soaked JHM car turns into a slower safe car. That is indeed a good thing. Thanks CountVohn!

#19

This. Although I would say most emphatically irrelevant.

#20

Didnt mick hsve simmilar results…