Darryl Waltzer

Does anyone feel an extra 40+ hp with the Renntech ECU upgrade is worth $2200+ and can you really feel a difference between 405 hp over 362 hp. Is it worth the cost?

Mr. J

You're paying for the warranty not the tune. The tune is milder than most piggybacks. If you are looking for a value proposition get a JB4 or a racechip. More power and < a third of the price.

BMS

JB4 is the best mix of performance, reliability, and cost out there.

https://www.burgertuning.com/product...-mercedes-benz

jim04clk

I had it. I did feel it on my 19. But car was running rich. CEL and erratic idle. I returned it. I’m currently running the Dinan sport tuner. It feels at WOT the same as the Renntech. If I get bored with the Dinan I’m going to run the VR Tuned 2 channel piggy.

Darryl Waltzer

Could I use the race chip along with the Renntech to produce more power?

batman719

No mate, both Renntech and Race Chip flash the ECU. One overwrites the other.

Darryl Waltzer

Thank you for the information!!

TModelle

If I am not wrong, Race Chip is a piggyback.

threeMBs

Yes, you are correct.

batman719

You're right - my mistake!

KyleSmith

I felt it on my 19', and like another person said you're paying for the warranty, so I justified paying the price for the warranty.

waisoserious

There are a few people in the whatsapp group that stack tunes.

EC+JB4
Techtec + JB4
Arc + JB4

But they only stack with JB4, not racechip. Cause the JB4 boost can be user defined.