I wouldn't buy a used motor, but that's just me!
If I were to go N/A, I would go 440 all the way with a nasty cam.
The jeep stalling isnt the motors fault, its the tuners fault.
I know the owner pretty well, he's local, I know how he drives it, etc. so I'm comfortable with buying it from him. I was originally planning on doing a 392 built for boost. My buddy called and said he was going to sell his 426, so I drove it around for a bit, enjoyed it, we talked about pricing and other parts I could pull off of his car, so this is something that has worked out to be a little easier and much less expensive. No solid plans on staying N/A or going FI.
My 426 has 11:1 CR and I dynoed at 500awhp and tq. The charts are in my for sale thread. I agree that the stalling is a tuning issue and not sure on a used motor. Also, if you are planning boost in the future, I wouldn't go with a 440.
I'd do an 11:1 426 for now, then when ready for boost, thicker head gasket to bering he CR down a bit and run the 6-7lbs of boost on that.
The drop in dyno numbers kind of worries me, but the shop we dynod it at seemed satisfied with it, so I'm guessing they are used to seeing these numbers on 426s...so maybe it is their dyno. I've thought about the thicker head gaskets or big valve heads or something to drop compression ratio if I decide on a blower.
How do you like the high comp engine? What speed stall do you have?
Yea the numbers do seem low but it could very well be the dyno, if it's built to the max you can throw a ProCharger on there, if it's a mildly built stroker then I would suggest at least getting the heads chambered to run a D1 at more the 8psi...
Now when I say built to the max I mean the best of the best products went into that bottom end to support anything you throw at it...not just the average forged components but a step or two above them...
I'm pretty sure the bottom end is a Callies rotating assembly, Manley I Beams rods, and either Wiseco or CP pistons. Originally it was going to be juiced with a 300 shot.
Yeah he just installed this 426 months ago, so I say its not more then 6 months old would be my guess. As far as the stalling I would say its something with a tune and if you do decide to buy it then I would get a tune from a tuner you trust. Also as far as it drinking oil even my Jeep with 28k on it will drink a 1 quart of oil from time to to between Oil changes, if not a little more....
Yeah, assuming you know the engine I'm talking about, he got it about 10 months ago. It's got about 5K miles on it. Tuning will be done by Johan or the install shop. While I'm incredibly confident in Johan's capabilities, being a high compression motor I guess I'm nervous that doing email tunes will just make it a difficult process for him to dial in timing.
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Much thanks for the replies, info and suggestions fellas.