Stage 2 RS7 on Meth/ gains/ video/ good times.

[SoloMotorsports]

We have been doing quite a bit with the 4.0t platform lately. You can find our S7 development thread here.
This RS7 was fitted with water meth injection and catless downpipes. It sounds amazing with the exhaust dumps open.


Stage 2 w/meth vs Stock


Stage 1 vs Stage 2 w/meth

[kouzman]

Very nice guys! Any track visits scheduled?

On average, what is the drop in IATS with the meth injection?

[S4M3]

Turbos have no more flow in them... I drove the car before and after and i can tell you is a huge diff with downpipes and meth

Sent from my SM-G935T using Tapatalk

[SoloMotorsports]

Very nice guys! Any track visits scheduled?

On average, what is the drop in IATS with the meth injection?

We noticed about a 20=-25*F drop in iat's spraying water/meth before the intercooler. There are tricks to get the temps even lower for the track. Fill your meth reservoir with ice and you will be amazed as your iat's drop instead of climb through a pull.

Were you guys surprised by the lack of gains in the higher RPMs? Looks like only a very minor gain in HP from 5400 on up to 5700. And from 5700 to redline it looks like no gain at all for the Stage 2 tune, meth and open 3" aftermarket downpipes vs the stage 1 tune with no meth and stock downpipes/cats. This is further proof that the stock downpipes and cats are very very good as I've been saying for months. What I'm surprised by is the lack of gains for the meth injection. I guess it's not really effectively bumping up the octane otherwise we'd see gains similar to those of competitor's software going from 93 to 100 to 104, etc.

Low end and mid range gains look great on paper but won't really equate to a quicker accelerating car in the 1/4 mile or from a roll. The reason is because after each shift the RS7 is already in the low to mid 5K RPM range.

Yes, two quick points to your point. While I agree that the stock hardware is quite good as far as stock cats go, the low end gains alone are definitely worth the trouble/cost of doing downpipes.
When we told the customer the gains and showed him the dyno sheet he had a similar reaction to you. Once he drove the car it completely changed his point of view. He couldn't believe how much more responsive it was and much bigger the power band was.


Here are some quick comparisons we did with the downpipes and water meth without any tuning changes to our stage 1 software for comparison.
You will notice it appears the top end lost power by adding down pipes. I would attribute this to heat soak as I was pressed for time and did not allow the car to cool down for a proper comparison. Either way it is what it is. No tricks, no gimmicks, just the actual data un-smoothed for your viewing pleasure.

Stage 1 (Green) vs Stage 1 with Dp's (Red)


Stage 1 with Dp's (Red) vs Stage 1 with Dp's and meth(Green)


Stage 1 with Dp's and Meth(Green) vs Stage 2 with Dp's and Meth (Red)
Notice once we retuned the car for meth it picked up power on the top end.

[Clipse3GT]

Which meth setup are you running?

[SoloMotorsports]

I have no doubt the car feels peppier around town with the extra low end grunt. But that's not going to make much of a difference in the 1/4 mile or from a roll where low RPMs aren't ever seen except for maybe on the launch. But looking at the video it seems like the extra low end torque is resulting in massive wheel spin and slower launches.

Especially when in the video we see that the extra low end torque is actually making the car slower due to wheel spin and/or short shifting into 2nd gear as a result of the spinning.

Just curious, why does the name of the last dyno sheet contain the word inlets (STAGE%201_METH_INLETS_VS_STAGE_2_METHFINAL.png)? Did you guys also try upgrading the RS7 inlets to something larger?

No we didn't change the inlets... for some reason I had inlets on the brain when I wrote that in.
With better tires you won't get that wheel spin.
The boost levels remained about the same but the the spool was several hundred rpms earlier.
I would invite anyone with a comparable stage 1-2 setup to come out to ATL and run our customer from a dig or a roll. He would be happy to do it.

I believe we will be getting some 1/4 mile and 1/2 mile runs with the car in the not too distant future. Our customer has expressed great interest in taking it out to the track.

[SoloMotorsports]

Can we see the boost and IAT data for the "Stage 1 (Green) vs Stage 1 with Dp's (Red)" dyno pull?

I'll dig up that boost data when I get a chance.
Here is the Iat data to show the difference between meth and no meth.

[tonymission]

Good stuff guys.
Who's running this SMS account? Predo?

[SoloMotorsports]

Thanks, can you post the IAT graph for the stage 1 vs stage 1 with DPs?

EDIT: Holy shit, are those IATs really in C and not F? If so, you guys have a serious heat soak and/or inadequate cooling/fan setup on that dyno.

They run about 20-25* cooler on the street depending on how aggressively you are driving the car.

Peak iat's at the top of the pull were about 90-95* on the street while pushing it pretty hard.

[SoloMotorsports]

Good stuff guys.
Who's running this SMS account? Predo?

No Predo is "Managing" our John's Creek, GA location now.
My name is Josh and I typically run this account.

[S4M3]

i say we put some nitrous on the RS7.... :)

Sent from my SM-G935T using Tapatalk