Don't be afraid to do some digging, ask tough questions (of the right people at Overkill, etc.), and insist upon some real data to back up any claims made on a product that it does what others' products cannot or have not been able to do.Īnyway.I know for a fact that there are some threads out there where members go on and on about the improvements the tuners have brought to their Pentastar-powered Challengers.I know because I'm the author on at least a couple of them :banana: As with everything else, your best bet on this is to make sure you're managing your expectations. But knowing what I know about the tuners, the canned tunes that come on them, and what they actually do for a car such that they can be considered "adding power", I will say I find those sorts of claims misleading at best and bordering on disingenuous for some of the buyers I'm sure they encounter.Īnyway, I don't want to make it sound like I'm anti-Overkill (I'm neutral, I promise!), so I'll stop here and move on. I am just saying you should definitely find out before buying a tuner from them.Ĭlick to expand.I have no knowledge about what their claim is based on or how much HP/TQ they claim their modifications will add over and above the tunes provided by DiabloSport. There are instances of folks having to basically pay for another tuner in order to get DiabloSport's help recovering a device that was seemingly bricked all because the device was sold to them by an unauthorized reseller (who modified it beforehand) and thus not covered by any of DiabloSport's warranties or support contracts.Īgain, I do not know if Overkill is an authorized reseller of DiabloSport tuners. That's a worst case scenario, sure, but the bad thing about worst case scenarios is they friggin' suck when they happen to you, because, well they are the worst possible scenario you could imagine. If they are not authorized resellers, I would strongly urge you proceed with caution if you ultimately decide to purchase the tuner package from them.īuying a tuner from someone who has modified it before hand, but without DiabloSport's approval to do the modifications means you would be putting yourself into a very precarious situation in the unlikely event the device goes teets up on you at the most inopportune time. You can proceed with confidence that you won't have any issues from DiabloSport in the event the product malfunctions or otherwise fails to perform due to circumstances outside your control and which necessitates DiabloSport getting involved and providing support and/or repairing the device. So I have no bias one way or another on this, but having purchased a couple DiabloSport tuners over the years (and having done the requisite research before hand), I would urge you to make sure Overkill is an authorized reseller of the DiabloSport tuners. I have had no interactions with that company, and I cannot remember reading anything about them, either good or bad, on this forum. But definitely go custom tune if you do it, the canned tunes aren't worth it IMO. I still think it's worth it just from the driveability improvements alone. But if I didn't race my car as often, I'd be more on the fence about it. Then just pick up a custom tune from Hemifever and load it onto the car. Saved about $250 buying used stuff and it works just fine. Trinity tuners are around $500-600 new but I got mine for $350 off of a guy on here and picked up a PCM for $300. He can get you the tuner, PCM, and his custom tune all for around $900-1100 depending on what tuner you go with (Intune or Trinity).Īnother suggestion would be to pick up a tuner and PCM used from this site from a forum member. I suggest calling Sean at Hemifever Tuning. Car is faster, more responsive, more fun to drive all around, etc. I have read several testimonials from members on the other Challenger forum with 3.6L that got a tune and love it. 2-.25 off the ET, which is around 25hp or so. 1-.12 from those at best, the rest is from the tune. The wheels are about 80lbs lighter, so I attribute. 35 tenths off my ET from last year with just a tune and lightweight wheels. Even on a stock car, a custom tune is better, mainly because they can get a little more power out of it and they remove a lot of torque management which holds the car back. If you're going to go through with it, get a custom tune. You will not see big gains from the canned tunes.
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