MoparDreamin
Well-Known Member
I never really see 408s that have anywhere near 100k miles on them. Do any of you guys have "high mileage" stroker motors ... more than 40k miles?
> The people who make rings, have tech seminars, and they say,main "reducers" are: thinner/lower tension rings(moly coated), better oils, zinc not withstanding and faster warm-ups. Rings have much more drag at 160F than say 210F.:glasses9: If were talking oem.400"sbc's, for 100k miles, they use"off-set" pins, carefully engineered to reduce rocking and wear in normal use. Most of our stroker kits Do Not have off-set pins,(most aftermarket piston mfgr's don't bother). I consider this a big wear factor, in the long run. There is "Less" extensive load at turn-over, with off-set pins(rod doesn't come to full stop at tdc.), and less rock because of off-set weight on valve pocket side of piston(heavier). TMI? :read2:chrysler long rod engines [most all] give less rod angularity at 90*
I believe that if a 400 chevy can go what ever 100 miles, so can a 4'' crank sb dodge.
the rod ratios are close-1.48-chevy 400 vs 1.53-mopar 408 , which still does suck compared to the better factory ratios
What's relative is RPM's the engine see's throughout it's use.
> The people who make rings, have tech seminars, and they say,main "reducers" are: thinner/lower tension rings(moly coated), better oils, zinc not withstanding and faster warm-ups. Rings have much more drag at 160F than say 210F.:glasses9: If were talking oem.400"sbc's, for 100k miles, they use"off-set" pins, carefully engineered to reduce rocking and wear in normal use. Most of our stroker kits Do Not have off-set pins,(most aftermarket piston mfgr's don't bother). I consider this a big wear factor, in the long run. There is "Less" extensive load at turn-over, with off-set pins(rod doesn't come to full stop at tdc.), and less rock because of off-set weight on valve pocket side of piston(heavier). TMI? :read2:
I never really see 408s that have anywhere near 100k miles on them. Do any of you guys have "high mileage" stroker motors ... more than 40k miles?