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Old 03-20-2015, 02:23 PM
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Need to swap pistons when SC?

A local shop has begun installing a lot of Sprintex kits on the V6 engines.

They say the pistons are too weak on the 6.4L to reliably supercharge.

Am I to assume they are wrong, based on all the SC trucks we are seeing???


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Old 03-20-2015, 03:32 PM
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Re: Need to swap pistons when SC?

Can't speak for others but I have been Ripp supercharged with the Vortech setup for 3k miles. Truck runs flawlessly and does consistent 3.4-3.5 0-60mph. I think with boost levels in the 5-7lb range yes your obviously adding more stress than the non forced induction stock engine setup but nothing it can't handle. More boost than that I would definately consider a fully built motor to support it.


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Old 03-20-2015, 05:15 PM
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Re: Need to swap pistons when SC?

Mine was also flawless and had gobs of power.... right up till it blew a ring land.

There are now enough example of broken ring lands post SC installs to warrant careful consideration of the potential future issues. I'm a complete newbie to such mods so take any advice with a big gain of salt, but I'm now getting my engine rebuilt with forged pistons, RIPP Stage 2 kit + Headers to hopefully reduce the potential for further issues.

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Old 03-20-2015, 05:43 PM
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Re: Need to swap pistons when SC?

Hey Jmone,
Been following your story for a while now. Would be good if you could post pic of your broken piston in this thread.
The pic I saw in your Broken ring lands thread, the 1st ring land was still in place. Detonation had weakened and broken the crown near the intake valve. Once that is broken, the ring has no support and breaks. Then combustion pressure is passed to 2nd ring. 2nd ring land is much weaker and fails, destroying oil ring etc and game over.
Looks to me like the ring lands are quite strong. However the crown is not too resistant to detonation and eventually cracks. Cast pistons do that.
Forgies will cop a lot more abuse but until the tuning is sorted, will not solve the problem...It will just kick it further down the road.
Most going down the S/C path, just want a lil more power.
Definitely don't need to be building an engine as most vehicles are nearly new and only running a few lbs boost.
The downtime and expense is a major turnoff...no way I wanna go down that path with my DD.
So the tuners really need to step up and get on top of this as it is a totally tune related issue.....
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Old 03-20-2015, 06:33 PM
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Re: Need to swap pistons when SC?

Thanks AuSuperchargedSRT, makes sense to me.

Being a newbie to such mods, I read the brochures, bought the kit, got it installed and drove it. I know all the after market mfrs say that it is a safe bolt on with stock engines, but as a few are finding there can be pretty major issues down the road at some point. I took (and still hold the view), that such a major change in power and performance (even if it is low boost), does come at a cost. For me this is my first decent car in decades (now the kids have grown up) so I'm was/am willing to have some fun even with the risk it brings in time, effort and $.

Your explanation could be right on the Detonation as after speaking to RIPP, Modern Muscle (Piston Heads), they were all about reducing temps hence the addition of headers and a larger IC as well as a new tune. Given my newbie status to these mods I've taken their advice of the mfrs of these bits as they say this will all be good. I guess I'll see.

My response for the OP is to highlight that all mods carry risks, and you have to be prepared to deal with them (hopefully before NOT after as in my case).


I've add the pic to my build thread of the busted Cyl 1 Head with an update of where the rebuild is at.
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Old 03-20-2015, 08:33 PM
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Re: Need to swap pistons when SC?

So, it sounds like there have been enough issues that my local shop could be correct. New pistons would be the safe route.
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Old 03-20-2015, 08:52 PM
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Re: Need to swap pistons when SC?

I'd say have a long talk with your SC MFR and raise the issue and see what they say. It could be that as these issues are being uncovered that they make changes to their kits/tunes etc to help reduce the risks or understand what driving conditions to avoid. You may be in a better position at that point to make an informed decision on what way to go for you.
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Old 03-20-2015, 09:43 PM
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Re: Need to swap pistons when SC?

I'm close to 4000 miles on my ripp kit , no issues so far , but somewhere deep in my mind I'm ready to build the motor .
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Old 03-20-2015, 10:04 PM
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Re: Need to swap pistons when SC?

I would do pistons and rods for peace of mind.
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