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Any tune can void your warranty. We actually have a warranty of our own on our tuning and even better we can send you a handheld that allows you to flash stock for dealer visits!
C7Z, 65 Vette, Toyota Tundra and looking for a C63S
Originally Posted by loungn14
Any tune can void your warranty. We actually have a warranty of our own on our tuning and even better we can send you a handheld that allows you to flash stock for dealer visits!
Any tune can void your warranty. We actually have a warranty of our own on our tuning and even better we can send you a handheld that allows you to flash stock for dealer visits!
Any tune can void your warranty. We actually have a warranty of our own on our tuning and even better we can send you a handheld that allows you to flash stock for dealer visits!
If your can is stock and want to keep your warranty, Dinan piggyback is your best option. If your car has other mods then a tuned will get you a little more power. I love mine Dinan piggyback
If your can is stock and want to keep your warranty, Dinan piggyback is your best option. If your car has other mods then a tuned will get you a little more power. I love mine Dinan piggyback
Doesn't any piggyback void warranty or were you talking about Dinans own warranty?
Are you able to switch between tune and stock? Is it a quick and easy process if possible?
For dealer visits, im assuming you uninstall and then again install the unit?
How many of you have the RENNtech ECU flash on your C63s? What are your impressions?
Just installed mine yesterday. Only got to drive a bit but initial impression is amazingly smooth and a nice power bump. I can report back more after some higher speed tests too.
Also I’ll say that their customer service and support team is amazing. Also fwiw the quality of the packaging and badging etc are top notch
My previous car was a Porsche. I did a ECU flash from COBB. The COBB map was fantastic. Previously I had a piggy-back unit from Racechip, I had to remove because of its harsh shifting and uneven power delivery. The COBB map was smooth, made more horsepower and transparently synced to the engine performance (likey factory map). I learned a dyno chart doesn't tell the whole story, and that a flash correctly done is better than the two stage operation of piggy-back hardware intercepting info and than sending it modified to the ECU. COBB doesn't make a ECU flash for Mercedes. That's why I'm considering the RENNtech ECU flash.
Just installed mine yesterday. Only got to drive a bit but initial impression is amazingly smooth and a nice power bump. I can report back more after some higher speed tests too.
Also I’ll say that their customer service and support team is amazing. Also fwiw the quality of the packaging and badging etc are top notch
Thanks for the info. Keep me posted on your impressions.
How many of you have the RENNtech ECU flash on your C63s? What are your impressions?
Renntech is top of the line period. There are none better in my opinion. I met the owner and toured their facility which was very impressive. I originally had Eurocharged and soon discovered that they were crap. Because I live in Florida I was fortunate in that I could drive my car to their facility. I left my car there and returned a few days later. I had the ecu tune, stage 1 turbo's, and performance fuel pump. I already had the catless downpipes and BMC air filters. After the tune my car makes 660 hp and 640 torque. Yes it is scarey fast. I highly recommend Renntech, however it is not cheap as you "get what you pay for".
That is not a good enough gain for a full ECU tune. OP's best bet is Dinan if he wants the least amount of headache. Can dealerships detect piggyback? Sure can. Do they go to those lenghts? No, 99% of the time., if you do not push them with big item repairs, you will never be in that 1%.
If you do go with an ECU tune, go with Renntech. I would stay away from any other tuner. Specially any Eurowhatisit tune.
That is not a good enough gain for a full ECU tune. OP's best bet is Dinan if he wants the least amount of headache. Can dealerships detect piggyback? Sure can. Do they go to those lenghts? No, 99% of the time., if you do not push them with big item repairs, you will never be in that 1%.
If you do go with an ECU tune, go with Renntech. I would stay away from any other tuner. Specially any Eurowhatisit tune.
Generally agree with this. except the wiring is pretty darn obvious to anyone used to looking under the hood. Sure you can just remove it and be completely stock, but it’s important to understand that it’s not just a matter of popping the piggyback off and then back on when going for service. It’s a minimum 90 minute job from disconnecting the battery to reconnecting it.
Easy enough just to use the Renntech HHT to put it back to stock in 90 seconds and zero effort. Could they technically trace the red lash? Sure. Will they likely ever try it need to if you’re using a tune like Renntech? Probably not.
That is not a good enough gain for a full ECU tune. OP's best bet is Dinan if he wants the least amount of headache. Can dealerships detect piggyback? Sure can. Do they go to those lenghts? No, 99% of the time., if you do not push them with big item repairs, you will never be in that 1%.
If you do go with an ECU tune, go with Renntech. I would stay away from any other tuner. Specially any Eurowhatisit tune.
lol, really? There really isn’t all that much performance data here to suggest that, just look at the 1/4 mile thread, more people are concerned about “pops & crackles” 😔
I should edit my original post to say I ran 126/127mph in the 1/4 & 155mph in the 1/2 mile. I also reduced my 60-130 time by 1.6 seconds & I’ve only removed the secondary cats from the oe dp’s, I’m not running aftermarket catless dp’s.
Last edited by crazy1eye; Oct 7, 2019 at 02:58 PM.
lol, really? There really isn’t all that much performance data here to suggest that, just look at the 1/4 mile thread, more people are concerned about “pops & crackles” 😔
I should edit my original post to say I ran 126/127mph in the 1/4 & 155mph in the 1/2 mile. I also reduced my 60-130 time by 1.6 seconds & I’ve only removed the secondary cats from the oe dp’s, I’m not running aftermarket catless dp’s.
127MPH trap for c63s, is not considered a 5mph gain to be honest. That is more like a 9mph gain. Stock C63s traps around 118, best 120mph. In which case that is quite good.
Piggy backs are laggy, inconsistent crap, and they can still void your warranty unless you take all those stupid wires on and off and on. Even so if you have drivetrain issues, they will log your car before doing big warranty repairs in which case, you're in the same position as ECU tuned people are. this topic is already beaten to death on here, so OP can decide for himself.
Piggybacks are easy, but dealer can and will either reject a claim and/or flag your vehicle. My GL350 has a piggyback - took the car in was denied the work due to tech seeing "chip". On the other hand my E63s wagon visibly looks modified - but is low on 20's, resonators removed (car is loud in service bay), upd spacer kit (visible red spacers), and tune - have never turned the car away - seems like it all depends on the technician working on the car - for what its worth i prefer the flash as least detectable
Piggybacks are easy, but dealer can and will either reject a claim and/or flag your vehicle. My GL350 has a piggyback - took the car in was denied the work due to tech seeing "chip". On the other hand my E63s wagon visibly looks modified - but is low on 20's, resonators removed (car is loud in service bay), upd spacer kit (visible red spacers), and tune - have never turned the car away - seems like it all depends on the technician working on the car - for what its worth i prefer the flash as least detectable
Flashes are not brazenly detectable only recently when they switched to OBD tuner modules last year when it cracked. Before tuners used to pry the ECU open, which would leave clear marks of tampering, which was a straight flag for service techs. This would be harder now. As far as I know, these new Bosch ECUs do not have a flash counter. Techs, probably have to log the car, for max boost pressure or do a checksum check to determine if the ECU was tuned or not. This is the reason why a second ECU is usually recommended.
Piggy backs are laggy, inconsistent crap, and they can still void your warranty unless you take all those stupid wires on and off and on. Even so if you have drivetrain issues, they will log your car before doing big warranty repairs in which case, you're in the same position as ECU tuned people are. this topic is already beaten to death on here, so OP can decide for himself.
I'd stay away from EC though.
Do you believe this is universally true, or applies to "some" piggybacks? I have not seen any Dinan owners complain of those things, for example.
From knowing Steve Dinan, he began racing for BMW back in the day and started messing with tuning suspensions originally. That was his original bread-and-butter. Over time he started tinkering with tuning. And, over the decades, he got brand recognition to the point where Dinan is the only aftermarket tuner out there who will mimic the same warranty period as BMW and now MB. And both BMW and MB have no issues with installing his products on your ride for you. I know of no one, generally speaking who will do this for Renntech, Weistec, Eurocharged or anyone else.
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