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Just an FYI, picked up latest issue of Mopar Now and they picked up a used 5.7 too see how far the bottom end can go before it poofs. It was a used core engine with 55k on it that they opened original ring gaps, put in cam, fresh heads etc. It made 1100hp with original pistons,rods,bearings,crank and rings before it ran out of turbo with a safe tune.

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No, they wrote it is still "reasonably" healthy and plan more testing when they can give it more air.

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My theory is not that they're running out of air, is that they're running out of spark. Been there, done that. In the lower rpm range I was making an average of 23 hp per lb of boost. Once I hit 20 psi I was down to only making 2-3 hp per lb of boost.

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No, they wrote it is still "reasonably" healthy and plan more testing when they can give it more air.

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My theory is not that they're running out of air, is that they're running out of spark. Been there, done that. In the lower rpm range I was making an average of 23 hp per lb of boost. Once I hit 20 psi I was down to only making 2-3 hp per lb of boost.

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Thats my theory anyways. I don't think the coils can handle the extreme cylinder pressures according to what I've seen at the dyno. We added an AEM cid box, but never had the chance to get back to test my theory out since the engine is now nestled in an engine bay.

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Thanks for all your input Jerry

Nice to be able to put a face to a name. 13 grandkids I thought I was low on time

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I wonder how the firecore coils will hold up

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I'm thinking they'll be fine. Rick sent me the very first set of his proto types. He heard we were taking a highly boosted G3 to the dyno and told me... "My prayers have been answered. Finally I can see how they'll hold up under high cylinder pressure. This is why I go to church on Sunday's"... I

Anywho, we bolted them on and started the tugs. We noticed the engine started to lay down at 5000 rpm, meaning our increased boost to hp ratio was dropping. BTW, the motor made 936 hp. Well after some head scratching we bolted on the OEM coil packs and tugged away some more. This time we got an extra 500 rpm and 22 more hp before the engine started to lay down. I hoped to have tickled 1200 hp, but that wasn't gonna happen. I sent Rick all the dyno info and he then sent it to his top notch engineer for revisions of his coil packs. I wish I had the previledge to dyno his new ones, but we were on a time frame. Also just to be sure it was the coils and not ring flutter or something else, I pulled the engine apart and all was fine.

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That's great info, and I hope they stick with development, thanks for posting.

We ran the stock ones to 24lbs of boost and I would not venture a HP guess, there were so many other issues to look at that we never really had the chance to evaluate coil performance. Now the car just sits there.

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Give Falzone an 'NCIS Jethro Gibb's' back head slap and tell him to get with it. You guy's can't leave that car sit there with all the hard work you've put into it.

Even though the engine still made power as the rpm and boost increased, we would have like to see 23hp per lb of boost, not 2-3. I started to question myself why the engine, which made 535hp NA, only made 958hp at 14.7 of boost where it should have been WELL north of a 1000..... Air, fuel, spark. I had the first 2 covered

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I did not see it posted, a lot of the early 5.7's we pick up @ TRA auction with bad engines sound like a rod knock turn out to be the valve seats falling out of the intake valve wiping out the ring land @ piston tops.The seats shatter & wind up thrown into the intake .Make sure the intake is clean from pieces because when the come unstuck they will damage ALL your fresh work.

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