Gents, understand all. Unfortunately I can’t get the links to open. Regardless, just had a conversation with John at Roc Euro about an air filter and he brought up my potential modification. Agreed with Ron, no MAF. Also said the more air I could get into the intake the better. Ram affect? Sure it may be minimal! Temperature and volume would be enhanced no matter what. Gentlemen, it’s just a friggin hood!!! Still thinking…it hurts!
Agree with what others have said about the NACA duct/intake mods, but one point to add… There is no MAF on the B8 S4, so there should not be issues with disturbed/turbulent airflow.
Nevermind… I see Ron already pointed that out above.
One thing I’ll add to this discussion:
Ram air generally works at lower speeds. Many american cars adopted the ram air principle, and even in testing, they found that at higher speeds (70mph+), there is a reverse affect–air is pulled out of the ram air duct!
Ford found this with their hood scoop on the SVO Mustang in the 80s.
If you look at race cars, you’ll find many not to use ram air induction for likely a similar reason. Actually, you’ll find vents pointed backwards on hoods etc. The reverse pointed vents cause an effect where air going over the vent actually is drawn in. And you’ll find this type of application to be used for Nascar.
It can also be argued that there are vents that are purposely ramming air (ie: F1), but the entire body was designed for that effect. Incorporating ram air as an additional component to an object which was made for other aerodynamic intentions may not always work (as evidenced by the SVO).
If we’re talking drag car, maybe ram air would be a nice to have. If we’re talking road course…it’s track dependent, and you’ll most certainly find that for high speed circuits, even prepared cars with ram air forgo this option on those circuits.
Ed, The links worked for me… If you want I can email them… Also, just sort the forum and look for my user id and look for a thread titled “winter mods” You’ll see it that way…
Ron, will do and thanks. Boro, I’ve actually thought about reversing it. However, the vent will be just inside of the seam on the hood about and about 12-18 inches from the leading edge of the hood so I think there will some pressure always. Thanks,
Just talked to Jeff, sales at REVO, and he says the 8.5 tunes should be out “any day”.
yeah, it’s a big turbo feeding his engine, and that’s the intake tract. No holes in the hood though.
That’s a 6 cylinder developing 1800 HP turning the 1/4 in 8.5 and 195 mph.
I posted this same response on a Vendorzine thread a few minutes ago, but is there some guarantee from Revo that they are not going to have the same issues? It just seems crazy to me to eat the cost of the APR tune when- with a little patience- they will get this sorted out. Obviously something is different with the 2014, and I have no doubt APR/GIAC will figure it out in around the same time Revo does (if indeed they have).
My response was to a local 2014 with GIAC stage 2+TCU tune that is also saying his 2014 is having similar issues. I am hoping he lets me do some logging on his car, and/or is willing to make a trip to the drag strip (I also have a 2013 GIAC stage 2+TCU car that should be going).
exactly what 7 people have told skypilot already. Just be patient. They’re all struggling.
Frankly GIAC and APR thought it was just fine…I don’t think they put out what they thought was an ass product just to be out. Arin’s research thread here sort of show that from a communication/marketing point of view, they were caught way off guard.
Hansel distracted from the issue, and everyone now thinks you can get a tune that doesn’t take (still comical).
For those who missed it…for me this just showed APR was like…wtf is going on.
Agreed, and more data the better at this point. No matter what anyone says, that is how you solve problems. One of the other guys what is having 2014/GIAC issues (PSUGOLD) said he sent logs to GIAC, and they said there was nothing wrong. Unfortunately, with one data point and not being aware of a problem, it can look like that sometimes. With 3 or 4 data points, it’s a little harder to say that.
I think you’ll notice many of us hate to see you spending money twice. However of you’ve reached your limit with APR and you feel REVO is the solution all I think anyone can say is let us know how it turns out.
Gents, be patient? Why? APR says my tune is working properly. I’ve heard nothing about changing the 8.5 tunes, switching, or DSG tunes. The 8.0s will be the first to get the DSG tunes. Maybe in a year APR will figure it all out for the 8.5s. Sorry, I’m not waiting!!!
Hyden, yes sir will do.
This thread topic is kinda going between two threads. I completely agree with you. If you need a dsg tune to get more advertised results and that’ll take at least a year why wait? I’m completely in the mind set with the others. The “just wait,don’t spend your money twice” still wait for what? If APR says your tune is working as expected and your not happy than I’d say you’ve got to weigh whatever works for you. If APR isn’t working or talking about working on the .5 tunes and there’s no dsg tune in the near future why’d someone want to wait on APR when REVO might possibly not be as great but they’re at least working on it.
Thank you sir.
These posts pruned from another thread, created this thread. Please feel free to continue posting.
Obviously shifting early isn’t going to help but have you ever looked to see if the tq converter is locking up or the tq transfer is being lowered. That could be something in the tune I know it was on the b6 S4 and jhm figured it out. It made a big difference with the automatic cars.
Just a thought