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#1
01-15-2014, 09:55 PM
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Pistons
Is the pin location the same on 428 and 455 piston? Or in other words, can a 428+60 be used in a standard bore 455?
Also, it appears KB is the only mfg that offers a dished piston for a Pontiac application. Any others? |
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#2
01-15-2014, 10:19 PM
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No, each has it's own pin height because of difference in stroke, 4.00" vs 4.21".
A 428 +.031 would be std 455 bore size as far as bore size is concerned. Ross offers dished Pontiac pistons. RaceTec offers a nice dished piston (23ccs in this case) for less $$ than Ross, here is one from a set I ordered for a 421 in std 428 bore size (4.120"):   
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#3
01-15-2014, 11:45 PM
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What he said, and both the Icon[KB] and the Race-Tec are nice pistons for a good price. Just don't go the Hyper-eutectic route with the KB pistons.
__________________
Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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#4
01-16-2014, 10:46 AM
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I am rebuilding my '69 WT with 48 heads using a 3" main 455 Ohio Crank. The block is standard and would be fine at .30 but I need to use a dished piston. The KB piston has a 30cc dish which might be too much but the Race Tech at 23cc would be better.
I have a new set of 428 60 over pistons and rods but it appears they will not work. Not a race car and hate to go .60 but unless I get custom pistons made there is not much else available. Thanks for the advice |
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#5
01-26-2014, 10:49 PM
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I'm doing my 65 HO. I am going to have to find a 421 type piston(valve reliefs) because I am retaining the original heads. I contacted Butler. 895.00 for Ross pistons and Eagle 6.8 rods.
__________________
 Mike McCarty You can drop the line, but you'll never kill the spirit!Pump gas 535 w/Marcella cv/1's. 11.0 compression, 4000 stall, 3.73 gears, 275 radial, to the axle exhaust, 3470# w/driver. 9.49 @ 140..........so far |
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#6
01-26-2014, 10:55 PM
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Quote:
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'67 GTO 400 HO - Ram Air - 4 speed - 3.55 Safe T Track, A/C, PS, red fender liners '78 Lemans - Drag car project |
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#7
01-26-2014, 10:55 PM
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Call RaceTec, they will custom make you whatever you want for a shelf part price. The guys that started Race-Tec, came from JE pistons. Nice pistons at a good price. You'll probably save $200-$300.
__________________
Paul Carter Carter Cryogenics www.cartercryo.com 520-409-7236 Koerner Racing Engines You killed it, We build it! 520-294-5758 64 GTO, under re-construction, 412 CID, also under construction. 87 S-10 Pickup, 321,000 miles 99Monte Carlo, 293,000 miles 86 Bronco, 218,000 miles |
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#8
01-26-2014, 11:06 PM
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Quote:
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#9
01-27-2014, 12:05 AM
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Weight Match
All my pistons and rods are mounted up and rings are on. I weighed them and 4 of them are 1719g, 2 are 1717g and 2 are 1715g. I think the 19 and the 17s are ok but I'm not sure about the 15s. I'm not sure I can grind enough off the 19s to bring them down to 17grams. I would have to start taking it from under the top of the piston and I would rather not do that. Wondering what you guys think?
If it makes a difference, the two 15s are on opposing firing cylinders(cylinder 2 and 3 firing 180 deg from each other).
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Robert 69 Firebird-462/Edel round ports/currently running the Holley Sniper/4sp/3.23posi/Deluxe Int/pwr st/vintage air/4wl disc( a work in progress-always ) http://youtu.be/eaWBd3M9MN4 |
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#10
01-27-2014, 03:20 AM
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Probe also has off the shelf dished pistons. Where do they fit in the pecking order?
__________________
Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon. |
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#11
01-27-2014, 04:04 AM
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Quote:
But I'm not away of them offering an off the shelf dished piston for the 428 combos. Ace may have had some like that when he was running PPR,but he had some sorta inside deal with them (Probe),you know,he'd buy so many sets and they'd make 'em however he wanted them,but the Probe catalog does'nt list a lot of what Ace was selling,so likely they're not a true shelf piston available directly from them. An example would be the 350 and stroker 350/383 forged pistons he was selling,they were indeed Probe SRS (sportsman race series) pistons,but they are'nt listed in the catalog either,thus not likely available @ retail pricing and such unless ordering multiple sets @ once,otherwise they're a true custom piston set,and then priced accordingly. HTH Bret P. |
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#12
01-27-2014, 04:20 AM
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Sorry, the Probe dished piston is only listed for the 4.21 stroke.
__________________
Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon. |
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#13
01-27-2014, 11:39 AM
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