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Mileguru last won the day on April 12

Mileguru had the most liked content!

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About Mileguru

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    Los Angeles, CA
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    2017 Sierra SLT CC 6.2L. '06 Sierra CC 5.3L Maggie SC 4-spd 4.10

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  1. I was wondering the same thing a few months ago and asked as well. I have not actually removed the blocks yet though. Is it safe for the leaf springs to sit directly on the axel? Here's the thread where I asked about removing the blocks:
  2. I already have the supercharger, so how about: A Wideband AFR Monitor (AEM has a variety) Alky Control Water Methanal Kit Calvert Traction Bars Hellwig Sway Bars
  3. Spark plug for 2017 6.2L w/ supercharger

    This is where it gets interesting, as there is a bit of disagreement. Justin said he believes closing the gap won't help, but a colder plug might help. The Brisk plugs are the only ones that I can find that are the same size as stock (including the reach) and allow for one or two steps colder. The only reasons I would entertain buying new plugs and not just regapping my stock plugs are 1) I can then get colder plugs, and 2) I'd hate to do all of the work of removing and reinstalling the stock plugs only to learn that the smaller gap did not fix it ($80 is worth not having to do the job twice). What is your opinion on a projected or non-projected tip? Thank you for all of you help so far by the way. I appreciate your time.
  4. Spark plug for 2017 6.2L w/ supercharger

    Thank you. Any advice on going one versus two steps colder? How about matching the exact length of the reach of the stock plug? It of course seems obvious that I should match the stock reach length, but I want to know for sure because it'll be $20 for the NGK plugs versus $80 for the Brisk plugs. And I'm pretty sure the Brisk plugs only last for 20,000 miles or so (I have to find a definitive answer on that still).
  5. Spark plug for 2017 6.2L w/ supercharger

    Justin at Black Bear Performance did the tune. I wanted to use the Magnuson tune, but they don't give you a hand held anymore to load the tune. It was strange, they didn't even know how I should get the stock Magnuson tune loaded because they didn't know how to deal with the HPTuners credits. I had an EFILive hand held from Black Bear already, so that's why I went ahead and used them for the time being. Because of this, I'm running a conservative Black Bear tune to stay safe until I can get things figured out with Magnuson.
  6. Hello, I have a 2017 Sierra SLT Crew Cab 6.2L with a Magnuson TVS1900 on it. The pulley and boost are stock from Magnuson, so probably 8psi max boost. I want/need to replace the spark plugs because I get a little bit of ping when really engaging the supercharger. The ping is very short and goes away, but it even does it with around a 94 octane (mixed 91 with 100). It is much, much better with the 94 octane, but it is still detectable. My questions are: 1) Should I get a one or two step colder plug? 2) Should I lessen the gap to 0.028in or 0.03in? 3) Should I get projected or non-projected tips? 4) THE BIG QUESTION, do I need to get the exact same size plug as the stock ACDelco 41-114 (aka GM part number 12622441)? The REACH is what seems to be different. I believe the stock plug specs are: Heat range: 16 Gap size: 0.04in (1.02mm) Reach: 0.98in (25mm) THIS IS WHERE THE NGK PLUGS DIFFER Hex size: M16 Insulator height: 0.99in (25.3mm) Seat: Tapered The plugs I am considering are Brisk (which have the SAME reach) and NGK (which have a DIFFERENT reach). Eight of the Brisk plugs is way more expensive than NGK. Brisk RR14YS - two steps colder, projected tip, 0.028in gap, same REACH as stock Brisk RR14S - two steps colder, non-projected tip, 0.03in gap, same REACH as stock Brisk RR15YS - one step colder, projected tip, 0.028in gap, same REACH as stock Brisk RR15S - one step colder, non-projected tip, 0.028in gap, same REACH as stock NGK BR7EF 3346 - two steps colder, non-projected tip, 0.28in gap, 0.709in (18mm) REACH which is different than stock NGK BR6EF 3177 - same but one step colder
  7. I got the same cap for free a while back and also found it to have a poor design when it came to using the lock. I guess I'm lucky that the plastic on the underside of the lock broke yesterday. I now just sit the cap on the circle like you would with Dogditcher's PVC solution posted up above.
  8. Jstev4610, I’m wondering if we can compare notes. I have a 2017 Sierra 6.2L 8-speed with a new Magnuson TVS 1900 on it. Black Bear Performance gave me two tunes. My main question is how much different the Black Bear tune is versus the stock Magnuson tune because I’m not getting great results/performance from the Black Bear tunes. Tune 1 on 91 octane California pump gas: - Quick, short-lived ping when really getting into the throttle while coasting at 20mph or so. Same thing when smashing the pedal down while already at highway speed. - When using the supercharger hard at city speeds, the RPMs seem to just jump up and no REAL torque is produced. This is a REAL disappointment. - In almost every situation I have to coax the supercharger to really get it to pull. I have to hit the pedal hard, let off, and then hit it hard again. It’s as if when I smash the pedal down and don’t let up, the truck won’t downshift and won’t allow torque to be delivered. When I say “smash the pedal,” I’m not talking about WOT flooring it past the click at the bottom of the pedal, I just mean giving a huge push like 80% of what the pedal can move. I don’t want to have to absolutely floor it to the bottom of the click every time I want to engage the SC in city driving. Tune 1 on a nearly 50/50 mix of 91 and 100 octane both CA pump gas: - Ping was nearly all gone, just barely noticeable in the low speed heavy throttle tip in. - Still did the same thing where the RPMs would shoot up with very little response to my “GIVE ME BOOST” command. Had to let off and then get back into it again. Tune 2 on 91 octane California pump gas: - Ping wise, reacts almost exactly the same as using Tune 1 with the 50/50 mix of 91 and 100, but with MUCH less power. At this point, I’m quite disappointed with this purchase, and I don’t know if it’s the supercharger, the tune, or the truck itself (torque management kind of stuff)… The response when asking for the supercharger to kick in is just not there and it’s embarrassing. I really don’t want to throw good money after bad, either, chasing down a fix. Speaking of a fix, here is what has been suggested so far: 1) Ping wise, Tune 1 and Tune 2 could be experiencing spark blowout. Guys on Performancetrucks.net have suggested to use a colder spark plug and/or shorten the gap on the plug. Black Bear said shortening the gap won’t help, but a colder plug might. I still need to figure out what plug to use because the two problems are the NGK plugs are not the same length as the stock plugs (but the much more expensive Brisk plugs are), and I need to figure out if I should use a projected tip or a non-projected tip. 2) Response wise, Black Bear said that maybe tuning the transmission could do the trick because it wouldn’t be lugging the engine so much when I get into heavy throttle. And yes, according to Black Bear, you can tune this 8-speed if you swap in a 2015-2016 T87 TCM, which I have. 3) Black Bear suggested dialing back the throttle response in the areas of ping. That concerns me because the truck already seems like a dog compared to what I would expect it to do. Honestly, it’s not worlds better than stock to justify the money I’ve spent on it. 4) Black Bear suggested using 5gal of E85 and 15gal 91 octane. I know Justin has said it’s fine to do with non-flex fuel trucks, but it scares me a little bit and E85 is not close enough to make it convenient to use on every fill up. 5) Could spend many hundreds more on a meth kit and then have to deal with getting and mixing methanol all the time. Until just a few months ago, my last truck was a 2006 Sierra 5.3L, 4-speed, 4.10 gears with a Magnuson MP112 on it. It kicked this truck’s ass in everything other than top end speed or highway supercharging. That truck only had 295hp stock and this truck has 420hp stock. Kinda wish I had just repainted that old truck and kept it, but how could I have known? So Jstev4610, hopefully you’ve read this far and can find the time to write about what you have experienced with the stock Magnuson tune so we can compare.
  9. I don't have the Bilsteins, so I don't have first hand knowledge of the pop, but I swear that I remember people talking about the low speed pop on this thread or another thread. I believe it was the top bolt not being tightened down all the way. Search the thread using the search box on the top right of this page. My truck (SLT Crew Cab) had a similar low speed pop while stock. The dealership replaced or lubed the bushings and it was fine after that.
  10. I had a 2006 5.3L with 4.10 gears, 4-speed tranny, a Magnuson MP112, and the stock Magnuson tune. I now have a 2017 6.2L with 3.23 gears (wish it were 3.42 or 3.73), 8-speed, a new Magnuson TVS1900, and a Black Bear tune. The trucks behave very differently, and each is better in one respect over the other. I'm not done fine tuning the current truck, but I like it. It's only drawback is that it is taking a bit more tuning to get it right. Maybe the stock Magnuson tune is better than what Black Bear is doing, I don't know. It's possible to get the TVS1900 for just about $5000 if you wait for a sale and can have it shipped somewhere that doesn't have sales tax, but that's pretty hard to do. I got mine for $5509 including the California tax from Black Bear's Thanksgiving sale. I wouldn't put too much effort in getting a Whipple unless you have plans for other significant performance mods. If you're just looking to bolt on power out of the box and be done, go with what you're comfortable paying because you'll be very happy with both kits. As a side note, get a catch can ASAP if you don't already have one. Mine caught quite a bit from when I put it on around 5000 miles and emptied it at 5500 (which was all with no supercharger).
  11. Thank you for the update. I meant to ask a long time ago...you didn't get the springs with your kit, right? Just the front and read shocks?
  12. The 2017 TCM has to be removed, swapped with a 2015 TCM (which I have), then Black Bear is going to tune it. I'm currently getting the supercharger tune fine-tuned though, so the TCM swap is on hold.
  13. A 2017 with a 6.2L and 8-speed can TECHNICALLY have the TCM tuned without using HPTuners. This is done by swapping your current TCM with an older one. You can get a 2015-2016 TCM and Black Bear will tune it for you. I don't think they have any TCMs left to buy though, so you gotta find one on your own. Here's some info from a post I made in another thread. http://www.gm-trucks.com/forums/topic/157013-what-have-you-done-to-your-k2-today/?do=findComment&comment=2105247
  14. So, I can FINALLY let the cat out of the bag now that Black Bear and a few others have posted that they are doing the TCM swap (well sort of...Black Bear won't be doing too many swaps because the cost of a T87 is really high). Many months back I tried to let people know that Chuck at Corvettes of Westchester (COW) could tune a 2017 8-speed with EFILive without having to send it to HPTuners, but I couldn't saw how he was doing it. Well, now you know. It was actually quite sad that everyone bashed Chuck when he said he could do the tune. He was way ahead of the curve and people bashed him just because they didn't know what he knew.
  15. That is correct. You can use a 2015 - 2016.

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