Well as some of you know I have recently put the vortech on my Jeep and made great power. I found out I have a hurt piston probably due to rushing the tune before spring feast. It still runs but sounds like it backfires, so I am in the market for a new engine. I will be calling multiple shops tom or in the upcoming days but what do you guys recommend forged 6.1 or 426?

Well as some of you know I have recently put the vortech on my Jeep and made great power. I found out I have a hurt piston probably due to rushing the tune before spring feast. It still runs but sounds like it backfires, so I am in the market for a new engine. I will be calling multiple shops tom or in the upcoming days but what do you guys recommend forged 6.1 or 426?


If money is not an issue then I would go with the 426 man. Sorry to hear about your engine. As I recall from your posts before the piston was already damaged prior to the Vortech install. Right? Good luck finding an engine man!

Yea it was not the votech that damaged it.

I'd go with the 392. :D

Talk to Arrington they might put together a good package for you.

your misfire is due to a closed plug. You can pull that plug out and regap it and you will eliminate the mis-firing. Whether you go with a 6.1, 6.4, or 7.0 you will be limited to 700 crank hp with that blower. The only difference between the 3 blocks is the amount of power they make when not in boost. The 392 will cost the same as the 426 as they both require boring/honing of the block. If a machine shop is skipping the align boring of the caps, they shouldnt be regardless of the condition of the block.

Forged 6.1L: $5600
Forged 6.4L: $6150
Forged 7.0L: $6150

Those are rough retail numbers for our blocks which includes 3/36,000 warranty, ARP Main/Head Studs, Clevite Bearings, Fully Blueprinted, Wiseco Pistons, K-1 Rods, K-1 Crank, and Melling Oil Pump.

I would do a 426 all the way

I keep hearing those 426 are nice. Go with one of those!!

the 7.0L is sounding pretty damn good right about now.

The 426.........