[RyzRT]

I totally agree with the posts above.

The RIPP website claims a 20 RWHP gain on a 5.7L engine, I seriously doubt that.

Since RIPP got famous from supercharging are the tested 5.7L HEMI engines supercharged as well? Even though they show naturally aspirated engines in their pictures, that may not be the engine they actually DYNO'd to make those claims?

When supercharged you should go to a colder plug and with that colder plug you run a tighter plug gap, well if the OEM coil specifications were satisfactory for the wider naturally aspirated plug gap, surely it is even overkill for the tighter gap.

So I am wondering if the increased spark voltage will seriously shorten plug life as many higher powered racing coil packs do?

These HEMIs run 16 plugs and just changing those is expensive and time consuming so is the increased spark worth it, even if it does what they claim?

I guess that is up to the person spending the money, but as one that prefers the set it an forget it approach, and enjoy driving your Challenger, well you should have gotten the point by now. Ry

 

[RyzRT]

@SCATFEVER

Consider just because you went with the RIPP when you replaced your used coil packs, if you had replaced with the OEM you would have seen a difference as well. Even though there is no service interval for replacing the coil packs as my 2015 Shop Service manual shows, they do wear from the high electrical pulses.

When my 2015 was running a little rough I replaced mine with the Blue Streak line which is after market and saw the same performance change as you did. And the Blue Streaks were cheaper than the Mopar and actually had a longer warranty.

The only true comparison is to run new stock coil packs and then swap out to the new RIPP coil packs, not compare new coil packs of any brand to those that have been run for 40K+ miles.

My 2 cents. Ry

 

[RyzRT]

@RyzRT

Honestly hadn't though about it like that, but if the coil packs need to be replaced at 35000 miles & 7 years, that's pretty sad...

I was having a problem with mine not running strong with close to 50,000 miles on it and I started researching when the coil packs should be replaced, but there was no interval to do that in the shop service manual? (Like these things are supposed to last forever?)

What I found weird when it came to trying to decide which replacement coil packs to go with I was going to go with the Mopar of course, but the individual coil pack was only warranted for 2 years, and they were the most expensive OEM replacement.

After further research I found the listing of heavy duty coil packs and they were the Blue Streak line, which I was familiar with their products from my old Shade Tree days and they were warranted longer, so I went with them, replaced all 8 and got an instant power improvement.

One other thing for you to check if your power is not what it was, is the 10 intake manifold bolts.

Sharing Regarding the 5.7L Intake Manifold

Edit Note: The 6.4 and 5.7 have the same plastic type intake manifold and share this problem.