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#1
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is my 455 crank done?
i got a factory cast 455 crank that is 30 on the rods & mains. the mains will polish out but the rods may need to be turned. is it possible to offset grind it to the 4.25 stroke & use the 6.800 rods? had this done in the past but the cranks were all std.dont wanna throw it out i've always had good luck with the stock cranks thanks. Shaggy
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#2
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even if it was only ground .010 on the rods it would be tough to get to 4.25, so no at .030-.030 there is not enough meat to offset grind to 4.25 Without welding it first to add material
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D.S.R.E. Your NW Pontiac Street/Strip Engine Builder, Specializing in Cylinder Head,Intake Manifold,and Exhaust Manifold Porting services and Building the Most Efficient stock rebuilds to Hi HP Pump Gas and Race Combinations for Pontiac,Buicks,Olds,FE Fords,385 Series and HP Gen 3 and 4 LS engines! 2006 silvy Z71 4X4,383 LS 600+hp NA Shared Toy-66 Lemans 470cid by me 537hp 580tq-manifolds, 570hp 590tq-2"headers,custom cam,rpm intake, mild e-heads, Looks stock ;-} |
#3
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If your willing to replace stuff like rods and pistons,might wanna look into the eagle 6.635" long rods to save the crank using the 4.21" stroke.
With the eagle rods you end up going to the BBC rod journal as SOP,only catch is that rod also uses the BBC pins,so you either have to modify the existing pontiac pistons for the .990" BBC floating pins,or get some pistons that are already set-up for them. Or I guess you could rebush the 6.635" eagles for a .980" pontiac pin,but I digress. |
#4
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.....are we going back to pontiac power shay?
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Home of WFO Hyperformance Shaker induction. |
#5
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Ditto to chief. We have sold a bunch of pistons for just that senerio. The .010 longer rod just about puts the piston at the top too.
And if the mains get beyond bearings available. Don't throw it away. I have a bearing conversion kit to put it in a 400 and all you do is turn down the mains down to 3" and also cut the seal part to 400 also. |
#6
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i will always love pontiacs.even though a ratmotor is in the frame rails now it wont be the last & final motor in the grand prix.the pontiac would walk all over this rat motor on motor but when i open that blue bottle rat wakes up! just recently came across some really nice pontiac pieces so im trying to get it put together.
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#7
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can you still get a +.040 rod bearing? used to...
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1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
#8
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We carry .040 Bearings. Rods AND Mains. In stock.
Be Cool, Ace
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Am I glad I got out of the business I was in? HELL YEAH!!! |
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