On the RS4, the owners with the APR 1740 kit report a number of drivability problems, including regular stalling at low speeds (the engine stalls trying to drive the 1740 which places a significant parasitic load on it). That’s a 4.2 V8 driving the 1740 supercharger. I wonder how it will go with the 3.0T!
I don’t think he’s questioning that (blowing engines in development… That’s fine by anyone I would think. That’s just the cost of pushing the envelope . The key is to do it on your own car rather than on customer cars.
I think he’s just wondering what they changed since blowing engines. If they had to back it off from the 475 whp claims arin made here a year or two ago , that’s going to be tough to sell.
Would be interesting to hear what they’re going to sell it for.
As for racing a giac car on race fuel that will be funny.
I really have no idea what Apr’s involvement even is here. Are ec and Apr still on good terms? Wonder if Apr just sent the test kits to ecode and they sold them to customers.
Why is the guy mentioning Magnuson? If you bought an Apr kit Magnuson would not be involved with you in any way. There’s no chance youd thank them any more than you’d reach out to thank the company that makes the hoses in the kit.
All around very weird.
would a larger charge actually produce any lag? as long as its spinning enough to build the boost that is required of the larger size plenum, there shouldn’t be any lag.
wouldnt that be more on the part of poor software? the car not knowing to increase its rpm at idle so it wont stall itself out.
it’s the same tuner
This is a kinda difficult question to answer easily. Blowers dont really have lag. The good thing about blowers is you can just spin them faster to push more air sooner. At some point tho if you run the blower too fast down low you can over spin it in the upper rpm range and just end up with a big draw from the motor to spin the blower and all you get is super hot air.
The bigger blower is going to take more hp to spin as there are bigger parts to move. So while you might not get lag you might see a situation where it takes more hp to drive the bigger supercharger then the smaller stock unit. But if you look at the compressor maps the bigger blower should be more friendly on pushing more CFM and that should mean lower charge temps. So there can be an offset to the larger drag to the bigger blower there.
As for the increase in hp with the bigger blower thats hard to say. Because with more CFM from the bigger blower your going to require more work to push the air or CFM into the motor so that takes more boost pressure from the blower. The stock blower is already pushing 17 or more psi so your going to need to take the bigger blower and push more then that. More boost is going to bring more heat but as I said before you should have a cooler charge from the bigger blower. But that wont last for ever once you get into serious boost and CFM the heat will go up very quick. So while the bigger blower might be able to push more CFM and PSI the heat might also get to a point where you can keep making more boost but your not making anymore power. In some cases you can actually loose power.
I would say the good news here is that this is APR and they might have had some bad moves over the past year or two they still are a very good company. It isnt looking good with the EC guy coming out and posting and now just creating more questions then answers. The short answer is you cant just bolt up more boost to the car and expect it to be faster. Look at that turbo disaster that the one guy failed at. Here with this project and these companys I cant see them bringing out a product that produces less power down low like the b5 guys do.
All these questions are why its so important to actually test and prove the car before haveing someone post about it on line and then say they are going to street race another car…
LOL! This keeps getting better/worse… I’m hoping all the things that are mentioned were done at APR and not EC? I just can’t see APR farming out final fitting, writing the install instructions, and final tuning? My guess it the car was shipped to APR through EC as they needed a stock car… If EC did do the above I won’t be buying…
Now some of these vids being posted and removed and such is laughable… Take the car to the strip and post some vids… Run some logs and post those… Otherwise keep quiet and let APR market their own product…
[QUOTE=ACLAB8S4;10909892]APR and/or Magnuson will release information at their discretion.
My car was used for a final fitment, the installation manual and final calibration.
Unfortunately that is all i can share at this time…
[/quote]
What a train wreck of a thread on AZ.
I’d expect some sort of NDA from the shop and the “guinea pig” (that if there was, both seemed to freely violate).
That section has really gone downhill…
It’s actually remarkable how bad the b8 s4 section has become. Sounds strange but I really think things took a turn for the worse when swank got the boot. Knowledgeable people started leaving. Don’t even believe they sold their cars.
You’d think it was a bunch of kids who are buying B8’s used, but it’s actually mostly guys with 2014’s and 2015’s. Same old shit…S4 vs M3…how much money you make…brake job costs…which exhaust…dsg vs manual…td1 tune. The signal to noise ratio is like 1e-5, and that’s just worthwhile posts.
id almost suspect at this point, the guy’s dad works for Magnuson, and he got it that way.
Interesting thought Kris… Wonder how they got a tune though? I’m still thinking the car was sent to APR and they did everything and shipped it back but who knows at this point… They won’t give me any details and I’m not going to keep bugging them…
Also, LOL at EC claiming you’ll need their garbage headers… This dude doesn’t have them so why would you need them and how would they know this? Oh that’s right it’s to make EC money…
[QUOTE=IbisS4;10911701]Just to contribute, I pmed eurocode, and they said eurocode headers is a must for stage 3
[/quote]
Who the roger federer lover? It was long before that.
It was when this site took hold. About 10 of the knowledgeable B8 S4 guys started posting here, and that was the start of the end. However once they gave primetime the cold shoulder and acted like morons, that sealed their fate. He was the most influential guy, doing the most work for the platform, and when they lost PT, they lost everything. Swank was barely noticeable.
To be honest though, the level of morons has always been the same. When I suggested people were whacko for claiming the B8 had 440 hp stock becuase they took an APR dyno of 330whp and asssumed 25% drivetrain loss I was attacked left and right as a B8 hater. I sugggested it was more like 360 hp , and was mobbed. Now everyone says that. When B8 morons would say the RS4 wasn’t ‘moddable’ and I pointed out that in fact the RS4 gains just about the same performance with full bolt ons as the B8 S4, again I was attacked. The forum was chock full of ignorant pinheads, and sounds like it still is. Just some of the smart people aren’t there to keep them in check.
My stage 2 revo car puts down 365 whp on a Mustang dyno. I’d be happy with 425 whp from an upgrade to a stage 3 kit. If the larger 1.7L plenum introduced throttle lag, I would not do the upgrade. It’s instantaneous now. What I’m saying is K04 turbo response times is not something I would sign up for.
On the RS4, the owners with the APR 1740 kit report a number of drivability problems, including regular stalling at low speeds (the engine stalls trying to drive the 1740 which places a significant parasitic load on it). That’s a 4.2 V8 driving the 1740 supercharger. I wonder how it will go with the 3.0T!
[/quote]
That thread went from hey this might be a good thing to wow this is a train wreck.
As usual tho this AZ crazyness is why AR continues to grow and do well. AZ blocks the AR links obviously because someone sees much better content over here and dosent want to let people find out about it.
would a larger charge actually produce any lag? as long as its spinning enough to build the boost that is required of the larger size plenum, there shouldn’t be any lag.
wouldnt that be more on the part of poor software? the car not knowing to increase its rpm at idle so it wont stall itself out.
it’s the same tuner
This is a kinda difficult question to answer easily. Blowers dont really have lag. The good thing about blowers is you can just spin them faster to push more air sooner. At some point tho if you run the blower too fast down low you can over spin it in the upper rpm range and just end up with a big draw from the motor to spin the blower and all you get is super hot air.
The bigger blower is going to take more hp to spin as there are bigger parts to move. So while you might not get lag you might see a situation where it takes more hp to drive the bigger supercharger then the smaller stock unit. But if you look at the compressor maps the bigger blower should be more friendly on pushing more CFM and that should mean lower charge temps. So there can be an offset to the larger drag to the bigger blower there.
As for the increase in hp with the bigger blower thats hard to say. Because with more CFM from the bigger blower your going to require more work to push the air or CFM into the motor so that takes more boost pressure from the blower. The stock blower is already pushing 17 or more psi so your going to need to take the bigger blower and push more then that. More boost is going to bring more heat but as I said before you should have a cooler charge from the bigger blower. But that wont last for ever once you get into serious boost and CFM the heat will go up very quick. So while the bigger blower might be able to push more CFM and PSI the heat might also get to a point where you can keep making more boost but your not making anymore power. In some cases you can actually loose power.
I would say the good news here is that this is APR and they might have had some bad moves over the past year or two they still are a very good company. It isnt looking good with the EC guy coming out and posting and now just creating more questions then answers. The short answer is you cant just bolt up more boost to the car and expect it to be faster. Look at that turbo disaster that the one guy failed at. Here with this project and these companys I cant see them bringing out a product that produces less power down low like the b5 guys do.
All these questions are why its so important to actually test and prove the car before haveing someone post about it on line and then say they are going to street race another car…
LOL! This keeps getting better/worse… I’m hoping all the things that are mentioned were done at APR and not EC? I just can’t see APR farming out final fitting, writing the install instructions, and final tuning? My guess it the car was shipped to APR through EC as they needed a stock car… If EC did do the above I won’t be buying…
Now some of these vids being posted and removed and such is laughable… Take the car to the strip and post some vids… Run some logs and post those… Otherwise keep quiet and let APR market their own product…
[QUOTE=ACLAB8S4;10909892]APR and/or Magnuson will release information at their discretion.
My car was used for a final fitment, the installation manual and final calibration.
Unfortunately that is all i can share at this time…
[/quote]