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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
11-17-2023, 12:01 PM
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Old Venolia blower pistons .047 in the hole
Years ago I started to build a new 428 to replace the 455 in my 78 T/A. I started to build the motor and discovered the pistons were well down in the hole, a whopping .047.
I bought the used Venolia blower pistons (.990 pins) from the late Greg Merrick. He had passed before I used them so I couldn't ask him about it. With that said, I shelved the project for a few years. I did find a set of BBC 6.660 rods and I do have a factory 428 crank with 2.20 rod journals. The pistons will still be .012 in the hole but it's usable. Idea #1 build it with the 6.660 rod and spray it. Idea #2 build it with the 6.625 (Eagle ESP .990 pin) rods and put a 6/71 blower on it. Either way, I would be using my KRE aluminum heads on it with pump E85. Attached is a old picture showing how far the pistons were in the hole. I believe this was the old style way of running blower pistons? Thoughts?
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 Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
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#2
11-17-2023, 03:41 PM
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Idea #3 A 6.700" rod and a thicker head gasket
Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#3
11-18-2023, 03:12 PM
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Quote:
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Johnny US Army Retired1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
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#4
11-18-2023, 03:22 PM
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Butler stocks .055 Cometic head gaskets. I have a set from them for a boost project.
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