Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here.

          
Reply
 
Thread Tools Display Modes
  #1  
Old 11-17-2023, 12:01 PM
Johnny406's Avatar
Johnny406 Johnny406 is online now
Ultimate Warrior
 
Join Date: Jan 2006
Location: Colorado Springs, CO
Posts: 2,815
Default 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?
Attached Thumbnails
Click image for larger version

Name:	428 deck1.jpg
Views:	64
Size:	58.1 KB
ID:	623404  

__________________
Johnny US Army Retired
1978 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
  #2  
Old 11-17-2023, 03:41 PM
Stan Weiss's Avatar
Stan Weiss Stan Weiss is offline
Ultimate Warrior
 
Join Date: Jul 2013
Location: Philadelphia, PA
Posts: 4,863
Default

Idea #3 A 6.700" rod and a thicker head gasket

Stan

__________________
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 Software
http://www.magneticlynx.com/DV
The Following User Says Thank You to Stan Weiss For This Useful Post:
  #3  
Old 11-18-2023, 03:12 PM
Johnny406's Avatar
Johnny406 Johnny406 is online now
Ultimate Warrior
 
Join Date: Jan 2006
Location: Colorado Springs, CO
Posts: 2,815
Default

Quote:
Originally Posted by Stan Weiss View Post
Idea #3 A 6.700" rod and a thicker head gasket

Stan
The pistons would be out .028 so run a .060 headgasket?

__________________
Johnny US Army Retired
1978 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
  #4  
Old 11-18-2023, 03:22 PM
Mr Twister's Avatar
Mr Twister Mr Twister is offline
Chief Ponti-yacker
 
Join Date: Jul 2004
Location: Wayland, Michigan
Posts: 898
Default

Butler stocks .055 Cometic head gaskets. I have a set from them for a boost project.

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:58 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017