Thread: Fluid damper vs harmonic balancer

Tweet

Not positive on this, but I believe only early 454's are externally balanced which means the dampner and flexplate have to match.

Originally Posted by NTFDAY

Not positive on this, but I believe only early 454's are externally balanced which means the dampner and flexplate have to match.

all 454 from gm came with external all years. not the same damper for all of them mark 4 over the years are the same till gen 6 454. 90and up need more on the fly wheel weight and some times come up less weight on the damper and needs to be reworked as some gen 6 454 have a reluctor wheel on crank and gets sandwich in so the over all damper hub is shorter . on dampers i throw old 454 dampers out there is no way i send one out for a rebuild with seal cut on hub . as new there priced right on all new. save that rebuild bul% $hit for a something that can not be found any more . i seen to many beat with a hammer or outer ring with dents in then helcoils and speed sleeves. seen them fail. on some old cast iron parts in a stock damper screw that. on low buck build s i use oem pioneer .i used them no bad feed back and used many. i buy new dampers for engine i build so its not hard to buy over 20 a year. stuff that gets beat the hell out of for street pioneer sfi steel damper .i stop using fluldampr long ago all my big HP builds i use only ATI oh do not forget to check your press and may need to be hone for the right press as race dampers this need to be checked . this can only be done with the right tooling and not a brake hone . a machine shop with sunnen tooling with the CR series mandrel can do this job