OETuning has been reputable amongst the Mercedes crowds looking for more oomph in their C63s and M278 E550 (that's the bi-turbo V8 one). While looking at their website today I ran across their 928 offerings and am quite surprised. Porken bowed out with the S300s for S4's, GT's and GTS' when he decided not to buy more proms.

Curious to know if anyone has tried them? Their HP claims are in line for cars with Ken's S300s and X-pipes, but no mention of any exhaust changes in their "claimed" increases.

http://www.oetuning.com/products/porsche/928

 

If there's no dyno chart, it didn't happen.

 

Nailed it.

 

 

_DEAD ON_

 

used their "Contact Us" link and asked for the dyno results cause I can't find them on the product page

 

They post Dyno sheets in their blog for more modern cars I know that. I've also heard nothing but praise for them.

We are considering an M278 E550 too in the future that I would be tuning with them. This motor is very underrated from the factory for purposes of not outshining the NA M156 AMG engines. When tuned [properly] an M278 engine can make over 540 crank HP and nearly 580 lbs/ft of torque.

Will be interesting to see if OEtuning finds this post and provides supporting numbers for their power claims.

So far I think Porken has the highest output with S300 chips for S3 and S4 cars while still being safe. Someone on this board dynoed their S4 with his EZK chip and an x-pipe, and made 293RWHP. With 18% drivetrain loss for an automatic, that is about 340HP if my math serves me right. That's GTS territory there!