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#41
12-09-2021, 07:23 PM
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Ross pistons and Eagle rods will handle way more than 600HP with proper block work and balance.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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#42
12-09-2021, 08:20 PM
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X2, Mike
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#43
12-10-2021, 10:37 AM
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The thing I don't like 4.5 stroke is the oil ring spacer. My thought was to go to 4.375 to avoid the spacer. Another thought is; I really like over square engines and none of these combos achieve that.
Question: Does the 4.375 stroke avoid the spacer?
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1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. 12 Bolt 3.73, 4 wheel disc. All A/C cars |
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#44
12-10-2021, 04:06 PM
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Is there an off the shelf piston for the 4.350 or 4.375?
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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#45
12-10-2021, 05:59 PM
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My IA2 block has a 4.35 crank, 4.350 bore, 517 cid. The main thing I liked was the longer 6.8 rod over the 6.7 rods I think most of the 4.5 strokes use. I still had to use ring support on bottom of the oil rings. But main reason was I wanted to keep more of the piston in the bore at the bottom as opposed to a 4.5 stroke, plus the longevity with a shorter stroke. I got Ross Pistons, scat rods w2000 bolts and kit from Butler. I think pistons took 10 weeks to get at the time.
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Illinois Outlaw Gassers 6.27@107 9.97@131 Last edited by Bill Eveland; 12-10-2021 at 06:06 PM. |
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#46
12-10-2021, 06:49 PM
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Why is this added ring support needed for strokes beyond 4.25?
Pic of rings with it and without to show the difference? |
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#47
12-10-2021, 07:18 PM
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Because the ring pack for oil rings go past into wristpin bore
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Illinois Outlaw Gassers 6.27@107 9.97@131 |
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