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Found 4 results

  1. To preface this thread; I am not looking to go to Bonneville or the Autobahn. Now that that's out of the way... 98-99 MPH when it's still pulling hard, and is on T Speed Rated tires, is a bit of a let down. I don't go that fast all the time, but I have found myself hitting the nanny state leash a time or two on the toll roads not far from where I am. In the immediate future is a CAI cold air that I will need a DiabLew Tune update to get the best results from. My thinking is that when he does the update, he also moves the limiter. Here is my question: What is the max safe top speed we can set it to? I say max safe from the stand point of not exceeding the drive shaft's max rotational speed, what Complete Street Performance called "Critical Speed". The truck in question is a 2018 Silverado 1500 LT TX Edition, Crew Cab, Short Box, 2WD, 5.3L, 6L80, 3.42 G80 rear diff, one piece driveshaft, on a 265/65R-18 112T Tire. If going off the speed rating of the tires, one would say 118. The speed rating chart is common knowledge, but not the end all answer. Again, what I'm not sure about is the max speed of the truck vs rotation speed of the drive shaft with my combination of trans, rear diff, and tire size. I'm thinking... 110-115. Thank y'all in advance!
  2. Hello Everyone After 4 years and 50k miles, I figured it was about time I shared my experiences with my Custom DiabLew tune TL;DR video at the end of this post Back in mid 2016, when I bought my truck, I also bought a DiabloSport intune i2 I wanted a Tune for the truck, and was interested in a Diablo because I knew I could deactivate the AFM with it, gain a bit of drivability, etc; and was aware that it could let me modify more engine parameters like Timing at Wide Open Throttle, so it seemed like a really good option. I was also interested on a custom tune from an HP Tuners dealers, but since I live in Mexico; my only reputable option was a 5 hour drive from me; This along with a string of bad custom tune experiences I previously had with my Stage 3 Jetta had made me doubt the tuning expertise of the people around me, so the DiabloSport brand, which seemed to sell a lot of handheld tuners seemed like a safer bet. After installing the 93 octane tune in my truck, and playing with RPM, fuel and Timing of course it drove better and seemed a bit sharper, but I still didn't think that it was everything I could get from it Enter my Friend Jose; who at the time was working on a brand new C7 Z06, and for the tune he was trying a Custom Tune remotely done by a guy named Lewis Eaton. Jose advised that he was giving it a shot because there were a lot of good reviews on forums and probably it wouldn't be a bad idea to try. After doing some reading of my own, I also thought that for $150 dollars, it seemed like a very fair price, even though I had been managing expectations. Fast Forward a couple of days, and I had emailed Lewis and followed his instructions: Install Canned Tune, Drive some Miles, record data log, send it to him along with the stock tune backup, etc; which were rather easy, even for a guy like me who is NOT an electronics fond person. I had my Custom Tune pretty quickly and I ended up rather happy with the result. To be sure I wasn't tripping, I put the ECU back in Stock BackUp Tune and it did really feel much sluggish and slower The only thing I asked Lewis to change was the Cat CEL after I removed the Cats from the truck and installed Long Tube Headers. Other than that, I have been running the exact same tune for almost 4 years now. In these 4 years I haven't had electronic misbehavior whatsoever, not a CEL, nothing. The Truck runs great and gives better fuel economy than stock. I use my truck pretty much every day, fast backroads driving, road trips, ranch stuff. IMO the best part of this tune is the Transmission Tuning, because its the behavior you feel the most; it keeps the Torque Converter Locked Up as much as possible, doesn't downshift unnecessarily and the shifts sound great. Some people have told me now and then that there is nothing better than a Custom HP Tune done by a reputable dealer in person, but since there aren't any of those near me, I would say im so satisfied with the DiabLew tune, that I wouldn't consider spending more money on another tune, even if I had access to another. And finally, Here is the video, YouTube pennies help me pay for my Student Loan and Truck Mods, so Liking and Sharing my videos is greatly appreciated:
  3. Truck details Make/Model: GMC Sierra Year: 2014 Engine: 5.3L L83 Trim: Work truck (blue blood truck right here) Transmission: 6-speed w/ 4 wheel drive Gears: 3.42 Miles on truck: ~53k Miles driven on tune: ~3k Performance Mods: None, apart from the tune of course Other mods: bed cover, remote start, tailgate damper Tuner: Diablo Intune I2 Truck role: Getting to/from work and doing work. Have another car for long trips Background I purchased a Diablosport Intune I2 for my previous vehicle, 08 Colorado I5. The tuner for that truck was the best investment I ever made, especially for the transmission tune. Lightning-quick shifts, more power, better throttle response, no complaints. That truck has since left my life, needed something with more payload, in comes the Sierra... Intro The truck commutes 15 miles per day for work and is otherwise a weekend warrior. About 80% city, 20% highway driving. Had no complaints with how the truck drove, until I started noticing an occasional downshift "clunk" when going around corners between 20-30 mph. Then, I remembered how awesome the I2 made my Colorado transmission. Said, "Screw it, lets tune this thing and see if the problem goes away." So I purchase the extra license for my i2, install the canned 87 octane/firm shift tunes, and go out for a drive... Big mistake. The canned transmission tune was QUITE bad. Started investigating, lots of complaints on the Diablosport forums, only solution is to try a Diablew tune. So, $150 and 3k miles later, here we are! The Process Contact Diablew with your information, wait 5 seconds for him to respond, pay the man, follow the instructions, profit (for him... and you, eventually). Don't want to cover this too much as it's not that interesting. Onto the tune! The Tune One engine and one transmission tune provided with tweaks available upon request. The engine tune can be provided for the octane of your choice, but keep in mind that the 87 and 89 octane tunes are the same with no spark advance provided for 89 (ie. might as well run 87 unless you tow in high temps, or just request the 91+ tune). The engine tune, after driving 150-ish miles... wow, I like it. Noticeable power increase in the low end (around 1.5k rpms). Feels better across the board. On the stock tune, I was getting random blips of knock retard on mobil gas, even 89 octane. The Diablew engine tune has yet to register ANY knock retard on 87 mobil. Better for the engine, more power, can't complain. The V4 mode was also disabled, though I did not have an issue with V4 (part of the "Cannot notice it's even working" club, which only has 7 or so members on this forum). MPGs are about the same, pedal feel is spot-on, spins the tires too easily (not a complaint, unless its raining) The transmission tune, on the other hand... it's not bad, but not for me. This was the primary reason why I wanted to tune in the first place, but I am a bit disappointed as a transmission tune made my Colorado (by comparison) FAR better than stock. The tuned transmission on this truck shifts a tad later (which I felt wasn't necessary) and also *tries* to shift firmer. I say "tries" because the firmness is random. When the transmission tune shifts firmly across all gears, I love it. But, the inconsistency breaks it for me. It also does NOT shift faster than stock, or at least not noticeably so. After searching through tune forum posts for this truck, it seems like everyone has had a different experience and probably no fault to Lew as a tuner, just that the truck has a silly transmission. No improvements after 3k miles of driving on this transmission tune, either. Remember that downshift clunk when taking turns around 20-30 mph? Since the transmission now shifts harder, the flaws are more pronounced. I reverted back to stock and due to the additional engine power in the low end, I think it makes the stock tune that much better. Due to the higher shift points, I feel that this tune would make more sense for a truck with the 3.08 gears (vs. my 3.42) as many people with 3.08's seem to hate the shift points. The tune is worth a shot no matter what, but my truck did not like it, unfortunately. I gave the Diablew TCM tune another shot. After the paint-stick-gas-pedal mod, this tune has definitely improved. Lew says its the adaptive transmission just doing its thing (more the reason to shove something up behind that gas pedal, the truck just performs better all around). The upshifts are much better, driveability all around is "as it should be" and the shift speed is definitely better than stock. Shifts fast and smooth. The only complaint I had was with the downshifting. When approaching a stoplight, the truck felt like it had a less-aggressive engine brake, causing me and my passengers to lunge forward. After asking Lew to modify the downshifts to be less-aggressive, I loaded the new TCM tune and all is well. I have changed my review to reflect that the TCM tune takes some time to adjust, but combined with the gas pedal mod, its totally worth it. Just be wary of how your truck behaves on the downshifts and notify Lew accordingly. Final thoughts Want more power for only a few hundred clams? Get a Diablewtune. More power than the canned tunes, less knock retard, and will take advantage of engine mods. Certainly try the transmission tune as "your mileage may vary" (har har), but the engine tune alone was worth it. Estimated gains from Lew are 12-39 HP, 10-35 lb-ft of torque, and +0-3 mpgs (all of which are mod dependent). Since I have no mods, I am happy with an additional 12HP/10lb-ft. Feel free to ask any questions!
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