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How many miles is too much? #2675906
07/09/19 10:07 AM
07/09/19 10:07 AM
Joined: Nov 2006
Posts: 2,252
IL
furious70 Offline OP
top fuel
furious70  Offline OP
top fuel

Joined: Nov 2006
Posts: 2,252
IL
Would you be afraid to boost a 125-150k mile Eagle 5.7? Nothing crazy for power expectations, less than the Jeepie on here to start. There's some local ones to me that I think I could get for under a grand.


70 Sport Fury
68 Charger
69 Coronet
72 RR
Re: How many miles is too much? [Re: furious70] #2675939
07/09/19 11:44 AM
07/09/19 11:44 AM
Joined: Jan 2003
Posts: 17,801
S.E. Michigan
ZIPPY Offline
I Live Here
ZIPPY  Offline
I Live Here

Joined: Jan 2003
Posts: 17,801
S.E. Michigan
In my humble opinion, as pretty much nobody:

Ring lands/piston durability should probably be the main concern, over and above the miles.

Bare minimum? Maybe consider opening the ring gaps. If I remember correctly the last one I rebuilt only had something like .013" on the top ring,
and it seems to me that's an awfully tight gap for a boosted application.


Rich H.

Esse Quam Videri




Re: How many miles is too much? [Re: ZIPPY] #2675986
07/09/19 01:21 PM
07/09/19 01:21 PM
Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
H
HotRodDave Offline
I Live Here
HotRodDave  Offline
I Live Here
H

Joined: Jan 2005
Posts: 12,406
Kalispell Mt.
I bought my 2011 ram with 300,000 and a bad cam and two broken valve springs, I thought I should stick another low miles engine I had laying around in it and when I eventually tore apart the original engine the bores looked almost new, the bearings looked new, there was no sludge (lots of wal mart oil change recepits) almost no wear on the valve job, I could have stuck a cam and lifters in it and gone another 300,000, since then I have torn down a bunch more and they always look nearly new unless severely overheated or never had oil changes and even those don't really look that bad. The precision the new hemi is built with along with the oil control engineered into them and better oil technology the cams and springs seem to be the only consistent issue I have seen in them even with very high miles. The 08 and back did have rod snapping issues but that was not oil related but apparently some crappy materiel or something.


I am not causing global warming, I am just trying to hold off a impending Ice Age!



Re: How many miles is too much? [Re: furious70] #2676056
07/09/19 05:42 PM
07/09/19 05:42 PM
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
Silver70 Offline
I Live Here
Silver70  Offline
I Live Here

Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
I've had the most issues with rod bearings... every single one I've had, 5.7s and 6.1s were pulled due to spun rod bearings. I'll never put another one in a vehicle without inspecting them all first.


68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram






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