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Just installed the Renntech tune on my G63. Truck does feel more powerful but now seems to have torque steer at WOT. Anyone else with this tune noticing torque steer? Might be the stock 21" Michelin Latitude Cross tires and the cold outside temps ~30F in my area right now. Will have to try it during the summer with summer tires to see if it will still occur.
Just installed the Renntech tune on my G63. Truck does feel more powerful but now seems to have torque steer at WOT. Anyone else with this tune noticing torque steer? Might be the stock 21" Michelin Latitude Cross tires and the cold outside temps ~30F in my area right now. Will have to try it during the summer with summer tires to see if it will still occur.
These trucks have torque steer even when not tuned, so more power doesn't improve that situation. Unfortunately there isn't much that can be done other hang on tight when you punch it. For what it's worth, my Ram TRX has some torque steer at WOT as well. It's not a G Wagon exclusive issue.
Ahh.. Alright. Never really noticed it before but I guess it's a lot more pronounced now with the increase power. But I'm still hoping having grippier tires will help mitigate some of it.
Ahh.. Alright. Never really noticed it before but I guess it's a lot more pronounced now with the increase power. But I'm still hoping having grippier tires will help mitigate some of it.
Post back your results once you get the other tires and it's a little warmer. I'm curious if there is any improvement. I can't give much input in that area as I always install suspension lifts and aggressive mud tires pretty quickly after acquiring them. I did run the G65 on the stock wheels/tires for a week or so when I got it, and it had a little torque steer. It was Renntech tuned as well though. The problem only becomes more pronounced when suspension lifts and aggressive tires are installed. Both the '20 and '21 I've done were lifted and fitted with mud tires pretty quick, but I noticed the torque steer in them even before the lift and tires (first few hundred miles).
Enjoy the power, all that torque has to go somewhere. Made me think of my dad, he used to build big block Corvettes when I was a kid...
As a five-year-old, in his 1963 split window, I would sit-in on my moms lap (without a seatbelt), hold onto the dash and yell, "Hit It!" He would stomp the pedal and the car would literally jump sideways as we took off...
Post back your results once you get the other tires and it's a little warmer. I'm curious if there is any improvement. I can't give much input in that area as I always install suspension lifts and aggressive mud tires pretty quickly after acquiring them. I did run the G65 on the stock wheels/tires for a week or so when I got it, and it had a little torque steer. It was Renntech tuned as well though. The problem only becomes more pronounced when suspension lifts and aggressive tires are installed. Both the '20 and '21 I've done were lifted and fitted with mud tires pretty quick, but I noticed the torque steer in them even before the lift and tires (first few hundred miles).
So yesterday was about 15F warmer here and I felt less torque steer. So I think having even grippier tires and warm weather should definitely help mitigate it for me
First tune didn’t work and had to send it back. I received a second tune and noticed no difference from stock. I sent that back and they said because I was one of the first 21’ they had to redo the map.
I have noticed some increase in power with the Renntech, but I was not overly impressed.
I only have 91 octane so that could be part of it.
one of these weekends I will get out my timing equipment and post some numbers of stock vs Renntech…
First tune didn’t work and had to send it back. I received a second tune and noticed no difference from stock. I sent that back and they said because I was one of the first 21’ they had to redo the map.
I have noticed some increase in power with the Renntech, but I was not overly impressed.
I only have 91 octane so that could be part of it.
one of these weekends I will get out my timing equipment and post some numbers of stock vs Renntech…
That's too bad. I have been thinking about getting the Renntech ECU tuner but it's reviews like this that make me reconsider.
That's too bad. I have been thinking about getting the Renntech ECU tuner but it's reviews like this that make me reconsider.
This is a one in a hundred malady and quickly rectified with RENNtech since the tuners are programmed via internet so the downtime (IF there is such an issue) is maybe an hour or so while the unit is reprogrammed remotely.
That said, we've never had such a situation programming cars using RENNtech HHT tuners and we typically do many many cars every season.
This is a one in a hundred malady and quickly rectified with RENNtech since the tuners are programmed via internet so the downtime (IF there is such an issue) is maybe an hour or so while the unit is reprogrammed remotely.
That said, we've never had such a situation programming cars using RENNtech HHT tuners and we typically do many many cars every season.
Yeah I'm not concerned about the quality of the RENNtech tuner but the comment about the performance increase not really being that noticable...
I was told last week by John from Renntech that the HHT cannot be remotely reprogramed and needs to be sent back to Renntech each time you want to change up the tune.
My Renntech tune is definitely noticeable. The truck pulls so much more than stock.
I was told last week by John from Renntech that the HHT cannot be remotely reprogramed and needs to be sent back to Renntech each time you want to change up the tune.
My Renntech tune is definitely noticeable. The truck pulls so much more than stock.
It can be remotely programmed by a RENNtech dealer. We do it all the time. Actually EVERY one of our HHTs are remotely programmed. We carry the blank units and program each one to a specific car here on-site. The process takes about 15-20 minutes.
It can be remotely programmed by a RENNtech dealer. We do it all the time. Actually EVERY one of our HHTs are remotely programmed. We carry the blank units and program each one to a specific car here on-site. The process takes about 15-20 minutes.
If only dealers are allowed to program, it's basically the same thing for the end user if they don't live right by the dealer. I wish they would allow the end user to program like how Eurocharged does it.
I don't consider a trip to a dealer as "remote". I guess my G is being "remote serviced" when it's sitting on a lift at the dealership, since I didn't have to drive it back to Graz (lol).
one question, I currently own a 2018 ford f150 raptor, I got it tuned. when I tuned it they told me I have to change oil every 5k km's instead at every 10k kms. since your using more power on the g wagon and the boost is increased, does that affect servicing in any way, like would u have to service more than before?
one question, I currently own a 2018 ford f150 raptor, I got it tuned. when I tuned it they told me I have to change oil every 5k km's instead at every 10k kms. since your using more power on the g wagon and the boost is increased, does that affect servicing in any way, like would u have to service more than before?
I change my oil every 5K miles in all my vehicles, none of which have any aftermarket tuning mods, and none of which I run hard. $60 and an hour of my time is a small investment for peace of mind. My neighbor heats his workshop with waste oil and he's always happy to take mine.
If only dealers are allowed to program, it's basically the same thing for the end user if they don't live right by the dealer. I wish they would allow the end user to program like how Eurocharged does it.
The end user can program their own car and put it back to stock. The dealer can load the tune into the HHT Programmer for the end user.
The end user can program their own car and put it back to stock. The dealer can load the tune into the HHT Programmer for the end user.
Right. But if the end user needs to change the tune or tweak it, they would still need to send it to a dealer or to Renntech. Too bad Renntech can't just send a new tune file to the enduser so that they can load it onto the HHT themselves just like some others allow (Eurocharged, COBB, and VF).
I have Race Chip. I run mode 6, even though most run 2-4. With 2 gallons of E85 blended with 91 octane I got my car to a 4.0 second flat 0-60 (C450 AMG). Can install and uninstall in 10 minutes
*I’m at 5200 feet elevation in CO.
without blending E85, I don’t feel much difference from stock. Just boosting the octane a little the car is a whole different animal for the $600 I paid for the race chip
Last edited by neversummer89; 02-20-2022 at 09:19 PM.
Right. But if the end user needs to change the tune or tweak it, they would still need to send it to a dealer or to Renntech. Too bad Renntech can't just send a new tune file to the enduser so that they can load it onto the HHT themselves just like some others allow (Eurocharged, COBB, and VF).
Because there is only 1 RENNtech tune and their tunes are 50-state EPA and CARB-certified. They don't want end users blowing up their cars by modifying and installing inappropriate software; especially when larger turbos and performance cats are installed. The RENNtech HHT is for those that want to plug it in, tune the car in 90 seconds, and be done with it...reliably, all without creating a software flag in the ME controller like most others do.
Right. But if the end user needs to change the tune or tweak it, they would still need to send it to a dealer or to Renntech. Too bad Renntech can't just send a new tune file to the enduser so that they can load it onto the HHT themselves just like some others allow (Eurocharged, COBB, and VF).
It's likely that neither technical nor security limitations prevent this, but rather end-user aptitude. In another forum, a guy is asking for assistance after connecting jumper cables backwards and smoking his alternator (and probably half the rest of the car's electronics). As an aftermarket parts supplier, you're dealing with a consumer base, some of whom will use a hammer to install a USB stick upside down, and you have to plan for the least common denominator.
Happy to report that my Renntech tune and exhaust valve controller showed up yesterday. I installed everything yesterday afternoon and it was exactly what I wanted for my 21 G550. Just a little more rumble and a significant increase in usable power band. Highly recommend.
02-08-2022, 02:52 PM
