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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 300CFM D-ports, Howard's custom SFT, Nash Intake,QFT 950 E85 carb, TCI TH-350, 4200 converter 3.73 12 bolt 11.24@118.33mph 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. 1972 LeMans 350 Pontiac H/S Drags project |
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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 300CFM D-ports, Howard's custom SFT, Nash Intake,QFT 950 E85 carb, TCI TH-350, 4200 converter 3.73 12 bolt 11.24@118.33mph 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. 1972 LeMans 350 Pontiac H/S Drags project |
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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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