I have talked to Austin, he said they will have a look at it. I know for sure if they fix it the car will be a rocket. I wonder if the reason I am bypassing more than Auditude has anything to do with headers? More to come!!
So prime that 11.06 was on 104 tune correct?
I wish I tested to other day when DA was close to -2000
I Want to see
18psi at redline
104 Tune
-2000 DA
And drop a 9.9 60-130!
Winter wheels are on so should be a bit harder, not much.
Id be willing to bet that the headers flow so much more up top that the car is bleeding boost. . Explains why everyone runs slower with the headers
I’m curious to see Auditudes bypass on his runs with the headers, maybe he can chime in.
He didn’t seem to have the logs or at least he didn’t want to talk about them on audizine when I asked
Auditude’s most recent B8.5 logs with headers…last Sunday in -2500 DA…
Bypass max Under 9%.
Peak boost was 16.5-6 psi in 3rd, 17.5 psi in 4th.
Boost high 15s/16.0ish even at redline.
One third gear run had 1556 Kg/hr MAF on pump gas.
Timing in high 18s at redline.
Minimal timing correction noted.
Was that on a B8.5?
I just can’t wrap my head around why I am seeing so much bypass.
sorta but not really. If it results in higher air mass into the cylinder can we see that on the MAF reading… if it lowers IAT can we see that in a log. I know the intended results are lower IAT but is the cars computer seeing that.
The issue is this bypass and maybe something with the methonal is triggering some kind of safe mode opening the bypass…
It does increase airmass, shown in my logs. It slightly lowers IAT, also shown in logs.
Even without meth my bypass is opening, with meth it just opens sooner.
Guys remember the MAF is calculated…sure it makes sense there is a little better cooling across the blower due to the meth, but that’s only a part of the game with meth injection.
It’s also possible the methanol is wetting and locally evaporating on the IAT sensor and giving a falsely low reading. It’s always possible considering the methanol is more likely to wet outer (colder) surfaces when in the pressurized chamber under the blower. And as it evaporates, cool lower than the actual IAT.
would be nice to see some logs with MAF, IAT, RPM, and MAP. and a quick check of the ambient air pressure, best way to do this is log MAP with the car off for a second on the same sensor you used prior.
I have headers also so I don’t think the bypass has to do with that… Weird that it dumps that much boost…
It doesn’t look like you’d hit 9’s with your current setup. 11.2 to 9.9 with just race gas and slightly better conditions is slightly optimistic. I have about 150 P-Box runs recorded and I’ve never seen that big of a gain.
I’ll post up some new logs this week!
Just for a reference since it was on race gas here are my numbers from the last time at the strip…
Bypass max Under 1%. few passes had 0’s the whole pass… One had 13% but it was right after a shift…
Peak boost was 14.532 psi in 3rd, 14.79 psi in 4th. So I am down 2ish psi in 3rd and 3ish psi in 4th… OUCH!
My MAF values are no where near this good… More in the 1350 range… Like Jay mentioned in a post I have some of the worst atmospheric conditions for those who report #'s
Timing in mid 20s at redline. 25-26 range… This must be where I make up for the lack of boost everyone else sees…
Minimal timing correction noted. Same…
Really miffed that my boost and MAF values are so much lower than these other cars yet my car runs fairly well… What else could it be besides atmospheric conditions? I am assuming internal motor tolerance’s are close enough where it’s not something related to that… Thoughts?
That blows my mind- you basically have the 2nd fastest B8 S4 ever, and the fastest pump gas B8 S4 as well…
However your boost and MAF numbers read so low.
Also your 60-130 isn’t stellar as well but somehow your car is a rocket down the strip.
Atmospheric pressure I’m sure has something to do with it to a certain point but I don’t know what else it could be.
Your numbers seem similar to how my car was on my 12.1 pass. Boost was high 13’s low 14’s and MAF was in the 1300’s…
My pump gas tune now is a lot faster and hopefully getting another revision this week which should be the final before they release the 6MT B8.5 tune.
I really would love for you to come to us and log, vbox and do 1/4 mile pulls… One day we will make it happen for sure…
I keep egging Tsivas on to get a clutch, his car is literally an animal…
I think he can get the record with me driving it.
He has gone 10.6 60-130 on stock cats, stock wheels, stock rotors, stock cooling and stock downpipes. I can’t imagine what’ll it’ll do on 104 tune now with his LW mods and CPS. Prob 9’s…
I was being super optimistic!!
Even bears logs weren’t that stellar in numbers. I think both bear and prime did record runs the same weekend and I graphed their logs together. One did 11.6, one 11.7, both we’re pushing over 119 mph. I’ll look for it.
Numbers from the computer only matter relative to your own. You’d be surprised how off the calibration tolerance of some sensors are allowed to be between identical cars, but it won’t affect the performance. I’m sure silentbob can tell us. That’s why these MAF dynos people are doing make me giggle.
Here. Bear in blue, prime in red. From record runs. Remember to think about absolute pressure not gauge (boost).
http://farm8.staticflickr.com/7111/8160170702_33ca73fa14_b.jpg
http://farm9.staticflickr.com/8057/8160135013_6354367112_b.jpg
What records are those? Edit missed your earlier post.
Auditude it should be noted that primetimes success is primarily et based so you won’t necessarily see him dominate the 60-130.
While he has often been the quickest et b8 s4 he is only the 5th or 6th highest mph (using his best times in the list…not looking at bad et runs where mph is often higher) .
What does that mean?
Means he is getting more out of his car than the other guys. Attention to detail, better launching, better technique all around. With less power. Likely due to his modest density altitude he seems to run in compared to the east coasters.
So citing his 1/4 et being disconnected from his prowess at the 60-130 (which is really a measure of top end power) shouldnt exactly be a shocker. It just shows that trap speeds are likely more correlated to 60-130 than 1/4 mile et is.