Arin@APR

The exhaust button now opens and closes the valves. When closed, they only open when you go wide open throttle and cross 4500 RPM. This is necessary due to back pressure.

The PDK, with our tune, shifts at the ideal shift point, which is below max RPM in each gear. In manual mode, or on a manual car, the rev limit will allow you to go slightly higher, which you may find necessary on some track in some scenario where shifting, or smacking into the limiter, its just not ideal.

Arin@APR

Correct. E85 add about 30 WHP over what we saw with premium pump fuel. It's an amazing fuel.

For roughly the past 10 years or so modern fuel systems have been designed to handle it, but I still think it's worth while to run pump fuel through the system every now and then. Now if you're one to store your porsche for months at a time, E85 isn't one of those fuels you want to leave sitting in the tank for months at a time.

slm9555

right, it would be nice if there was an option for oem programming as the off button. That way it’s quiet in the low rpm’s but would open above 3800 without having to go full throttle.

any comment on why this tune is $2500 but the regular 718s are only $999?

kk2

@Arin@APR is there any stage 2 under development for those with high flow cars or aftermarket oap?

Is the 718 4L able to safely compensate for dumping in 2 gallons of e85?

Arin@APR

Yes many reasons. I think most importantly, it's what I believe it's worth, just like our other 4.0L tunes, because results are outstanding. This is probably partially due to the fact we do our tunes from the ground up. We don't use a file service from Europe. Development time + emissions testing is expensive, and a fair price will help to justify doing engines like these even though they are very low volume.

Arin@APR

We didn't see a need for more tuning or different stages. Hardware is plug and play just like it is on the stock cars.

This is one of those "If you know what you are doing" responses: It depends on the mixture and content. The fuel system, when properly calibrated, can run on full E85. The headroom is there. If the factory fuel trims aren't maxing out, then a little E content on the 93 tune will work. I'm not suggesting anyone do that. Again "If you know what you're doing."

kk2

You’re not suggesting anyone put 2 gallons of e85 into a 93 fill up? Or you’re not suggesting anyone run full E?

Arin@APR

I think if I understand what you were asking, you were asking if it's ok to run a little ethanol mixed with premium on our 91 or 93 octane tunes. Is that correct? Some people will understand how the system works, what to check, what to look out for, and will do so with success. But I'm not suggesting anyone who doesn't understand how it all works just blindly do that.

Bents

While I often complain about the Porsche Tax, I respect and appreciate this honest response.

MrFunk

It's the "GT" tax.
I've used APR in my Audi days... a reliable product and good support from a good company.

BoxKing

Hard pass for me if there's no specific support for Header>Back/OAP>Back specific tuning. A free flowing exhaust setup should net greater gains than those that are stock with a tune thats focused on these additions. And lets face it, most of your audience will likely have additional supporting exhaust mods to justify a properly tuned map.

The 4.0 is not a one-size-fits-all platform

Arin@APR

Our experience has been different. We’ve tuned several 4.0L engines at this point, including a few custom setups for tracking. The hardware did not require a different tune to make more power. If the hardware made more power on the stock tune, it also did so with our tune, and more tuning didn’t net more power. I'm always happy to try something out though!

wam22

I would consider it at $1,500 (Softronic's price) since I paid $999 on my 718 CS and Audi A5 (probably less, it was a long time ago), but not at $2500 (plus tax and labor) while playing with Porsche's warranty and the costs of repairs on a GT car. I get they have to recoup development costs and the GT tax, but just too steep for a stage 1 tune IMO. If the $2500 came with an APR Plus warranty, I would be calling my APR dealer now. Or if there was an app/at-home solution like I had in my M4 with bootmod3 where I could go in and customize everything, and that was under $1000 all in with a new Windows computer, ODBII cable, etc. Even a 992 GTS APR tune is $1499.

mc3456

Group Buy Opportunity: $2,500 for both ECU & TCU in a Combo Pkg???

RoyKeane

what about warranty? is it voided if i install this mod?