Can I use APR Stage 2 plus tune with IE 207mm crank pulley with APR Ultracharger?

[S4orceAudi]

Car currently sits at APR Stage 1 ECU + TCU plus IE down pipes. I want to go IE 207mm crank pulley, APR closed intake with aftermarket heat exchanger & APR Ultracharger TB. My question is can I run the APR Stage 2 plus tune with this setup? Since I already paid for the Stage 1 tune upgrading to Stage 2 Plus comes with a nice discount.

[Fresh.S4]

yep.

you could even run the pulley with just the stage1 software and have PLENTY of fun! thats how I started. Then I added a ported blower (while still on stage1), super fun.
then I ended up having to switch to 034 for the tp file.
the upgrade should only be a couple hundred bucks because that was my original plan too.

[carguy19]

The DME is only going to allow the boost target in the software to be met..... anything more would be vented out the bypass valve.
With Stage 1 cars using big lowers and small uppers, all you are doing is creating more heat by spinning the blower harder then it needs to be spun and essentially wasted because the excess is bled off, which is why most companies tell you what upper/lower to use with each stage but to each their own.

A 207 lower and stock upper will give you the same pulley ratio as the APR stage 2 pulley kit.

[Fresh.S4]

generates more heat? .... maybe if your cooling system is wack.

i NEVER generated unnecessary heat, even in beautifully warm/hot southern california.

its getting kinda old folks that post this idea of "more heat" when they've never actually tried it themselves.

[carguy19]

generates more heat? .... maybe if your cooling system is wack.

i NEVER generated unnecessary heat, even in beautifully warm/hot southern california.

its getting kinda old folks that post this idea of "more heat" when they've never actually tried it themselves.

If you spin a blower 50% faster, it generates more heat, whether the increased air/boost is put into the engine or vented out of the bypass, hence the need for intercoolers on stage 2 cars.

If you have a stage 2 pulley setup on your car and you are running a stage 1 tune, the added pressure/volume of air that is getting vented out of the bypass is not being used, but the blower is running hotter then a stage 1 pulley would make it run.... so yes, it does run unnecessarily hotter with that type of setup. Faster blower speed = more heat from more compressed air and more friction.

[SwankPeRFection]

The heat increase is more from the additional air compression. Like it or not, while spinning it more does generate some additional heat and unnecessary (wasted blower RPM since you’re bleeding it off anyway) when the bypass opens, that air pressure drops and that heat delta is as well. The valve isn’t pulsed, it’s cracked open to bleed off, so it’s a steady release of the extra pressure in there that would constitute the extra compression and heat generation from that normal process.

A 207 lower puts you in the DP tuning range. APR doesn’t have DP files and just maps their Stage 2 file for all sizes, but for anyone else reading this thread, NOT ALL tuning companies do this and if you went with one that had specific DP files for their tunes, a non-DP ratio file will bleed off boost, so just FYI to those people.

[blackfunk]

As per APR - I know because I called them - Adding a larger pulley to your stage 1 tune provides no measurable increase in performance. So, while its safe to do so, your system will simply bleed the additional, hence the need for their stage 2 tune.

[carguy19]

As per APR - I know because I called them - Adding a larger pulley to your stage 1 tune provides no measurable increase in performance. So, while its safe to do so, your system will simply bleed the additional, hence the need for their stage 2 tune.

Thats what I said above this morning.

While the blower will definitely make a lot more noise, its not going to get you any more power, since the boost target will be reached that the tune calls for and the bypass opens up at that target, essentially wasting all the extra speed and more air out the bypass valve.

[ak-s4]

A larger pulley on stage 1 wouldn't increase the maximum dyno numbers, but I would question the blanket statement that there is no measurable increase in performance. You are increasing boost & torque throughout the lower RPM range where that maximum boost limit isn't being reached. So you should have a much wider/flatter torque curve. Unless APR is crippling the output?

[EvolutionArmory]

When you add a pulley to a stage 1 tune it increases boost to the maximum boost the ECU allows before it blows off. You will see a small increase in performance because you’ll be making the max boost a stage 1 car will allow.

The ECU will just blow off what’s left over and be less efficient than if you just ran a stage 2 file.

This is how JMK 034 was able to run 10’s while on 034’s stage 1 file. He ran a lower pulley and just rode the boost limit and claimed being “stage 1” like a fraud. 🤣

[S4orceAudi]

Thanks for all the great info guys. But I’m still not clear if APR Stage 2 plus file will take advantage of the 207mm lower pulley and let the car make the power it should.

[EvolutionArmory]

Thanks for all the great info guys. But I’m still not clear if APR Stage 2 plus file will take advantage of the 207mm lower pulley and let the car make the power it should.

Yes. APR’s stage 2 tune works with any pulley ratio.

A 207 pulley gives you the same boost as a 187/57 combo


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[S4orceAudi]

Zero boost bleed with this tune?

[Grad max]

Wow!!! APR's stage 2 tune works with any pulley ratio.


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[EvolutionArmory]

Zero boost bleed with this tune?

APR sets their stage 2 boost limit to 2440 mbar so as long as you make 2440 mbar or below for boost, the valve will stay closed.

The tune is the same tune wether you have a 2.8 ratio up to a 3.2.

My boost valve only opens with a 3.2 ratio when it’s really cold out and it’s only minimal. When I ran a 2.9 ratio it never opened.


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[EvolutionArmory]

You should also look into all the problems people have with 207mm pulleys and reconsider running one. 187/57 combo is tried and true.


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[BurnTheObedient]

You should also look into all the problems people have with 207mm pulleys and reconsider running one. 187/57 combo is tried and true.


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I was just told this exact same thing this morning.

[Nillious]

I think a lot of problems come from using different bolts and torque specs. The oem bolts get torqued to 29 nm plus 90 degrees. This is drastically more force than the 20 lbs and done in 034s instructions. I feel like 20 is not enough stretch for extremely hard 12.9 bolts. I’m

[ccssid]

I think a lot of problems come from using different bolts and torque specs. The oem bolts get torqued to 29 nm plus 90 degrees. This is drastically more force than the 20 lbs and done in 034s instructions. I feel like 20 is not enough stretch for extremely hard 12.9 bolts. I’m

I posted this in another thread a bit ago: https://www.audizine.com/forum/showthread.php/989149-Sheared-off-034-Crank-Pulley-Bolts?p=15057171&viewfull=1#post15057171

Note: for the benefit of others...I believe Nillious is aware of the above post [:)]