this is the new RC and Fish tank thread, so it’s 100% on topic.
That is retarded by the way. The little heat exchanger is awesome.
jspazz called me out on az to not turn it into a RC car thread so i thought this might be on topic to post there lol
It actually looks like a intercooler upgrade…that’s relevant here
Here’s a question…
If a b8 s4 runs a Revo race gas file, on excellent 110 octane fuel, and also runs an APR pulley with it, what will happen
A) 11 second glory
B) 12 second sad faces
C) 12 second sad faces + catastrophic engine failure + maybe transmission failure for good measure + a face palm
If it is C, what do we think caused the catastrophic engine failure. Or, I mean, what could cause it (since this is only hypothetical).
Boost and power levels that the cast rods can’t handle?
Timing levels that the cast rods can’t handle?
Boosted power and timing working together to kill the car?
Piston failure?
I don’t know Saki. I don’t know anyone who’s done that.
I’ve seen logs of an engine failure on REVO with a stock pulley at 1800 hPa. Didn’t you see the logs? Maybe Prime or Tsivas can send them to you.
Why do you ask. I’ve ran that exact setup, except it was with VP109 not 110oct. No engine failure car was faster then ever.
^^^You ran the pulley plus the tune pp?
I’ve never seen the logs Jspazz. Not
Sure I want to.
No theories?
Weird… I heard Revo had scrapped the pulley idea (per Gary) bc it wasn’t making that much more power than stock and that wasn’t worth the hassle/$$.
What is so different with the APR pulley vs the one Revo was testing? Doubt there is much. Just like there won’t be much difference when the GIAC pulley is released even though we are seeing some funny speculations. I heard a “18 PSI from 1Fast” boast at one point. LOL. Truth is… 18 psi is seen by my car also… big whoop. I’d rather honestly have the crazy boost down low and the increased timing up top. There is no way to run 27.5 degrees of timing (what I have seen on GIAC 100 file/stage 1) with that much boost. Ain’t happening.
Most of the pulley gains (from my dynos/logs) are down-low (2500-5500 rpms) as shown between a stage 1 and stage 2 car back to back on same dyno (summer). Truth is - without a CPS or upgraded cooling system, at least in the summer, all that extra boost (16.5-18lbs depending on atm conditions) is just hot air.
Decreasing timing (as APR stage 2 v1 and even some more as v2 did) to compensate for these IAT increases has more of a decreasing performance effect than you think. Revo runs some crazy timing on pump gas (25-26 degrees) with 14-14.5 psi boost max and the DSG version is faster than any pump B8 S4 we have tested (referring to 60-130). 11.06 (REVO stage 1) vs 11.30 (APR stage 2).
I have and it was very quick. I don’t have any power info because it was only for a few days before I got my APR software. My car is faster the way it is setup now.
I remembered this happening and just wondered if the rods gave up because of power made or if it was because of something timing related or both. Hard to say. Would have been an interesting case to see if we have seen the limits the internals can handle safely (or couldn’t handle) however tough to say.
Most aggressive tune on their race file + bigger boost from a pulley not designed for the tune in question…that would be the most ‘pushed’ B8 S4 out there on stock internals so far.
Good question. APR leaves a little on the table in the tune, whereas REVO goes balls out. Still you’d think REVO would benefit from more air…
Since you put it that way, I have the most pushed S4 out there, without any issues. My friends car has a stage 2 with 100shot of nitrous. He runs racegas most of the time like primetime. When hes on race gas and and im on pump my car is slightly faster than his, maybe a carlength 60-110. When he sprays and im on pump, he takes me by like 8-10 carlengths ~60-120ish. I think his car might be more, “pushed” then mine in terms of his setup. I do however drive the shit out of my car and redline 40+ times a day.
Jesus a 100 shot???
Yeah that other car that blew didn’t like the tune then… Not likely a power limit thing.
If he is hitting a 100 shot on stage two that’s got to be making 450+ wtq. If so and the rods are handling it that’s great.
I’ll send you the log saki, when I’m at my desk…
The timing on the REVO tune on race gas pushed the boundaries of reasonable thinking.
Ya im sure that other car had tuning issues. For what its worth I was running the very first and most aggressive version of the Revo software the whole time I had it. Also the Nitrous car has not had any problems. My friend David from Eurocode is actually installing a 200 shot on his Orange 2013 S4. Hes trying to blow his engine. It is very exciting.
That is indeed exciting. Good for eurocode for trying to see what they can do.
Seems the 3.0T is a much more cost effective engine to blow and replace thanks to its use in so many models. Finding the limit on an RS4 or new S6 or something is terrifying because finding a motor is hard and damn expensive.
It’s nice when your a shop owner, you have the capability and the drive to rebuild the engine on a brand new $60k car.
It irks me to see companies tuning and making products for these cars without owning the car itself. It just signals to the market that they’re practicing on customer cars…and that’s very odd to me concerning fairly major parts (tuning, superchargers, nitrous kits etc). Owning a shop, you need a car for yourself. So…buy a $40,000 used S4 to develop your parts on and get rid of your SUV.
Also this one is for you. His plan the whole time has been to take the car to the dragstrip and try to blow the engine there. If and when he does do that, you can bet your ass I will tag along with my car.
Go to Sacramento (well…suggest that to them). It’s at sea level, and it’s cold up there. It’s also NHRA certified. Last week the DA at SAC was -1700 at 9 am. It was -800 at 2pm.
Going to that podunk track with the hill and tailwind etc. is a bit of a waste as the terrible times people run are always explained away with ‘oh it was hot’ and ‘oh the prep sucked’ and ‘oh it’s uphilll’.
Sac is fast, great DA and no excuses.