Calling Norval. Got my hydroboost unit today.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by BlackRat
The wife got a kick out of this. 
Ok bare with me a second. As I read this you are saying that manual brake master cylinder holes are to deep thus the short rod pictured at the top that came with the HB will not work. Just to clarify my MC is for power brakes. So I do or do not need to pull the piston out of the MC and send it to you?
As far as the line adapters go I hope to order them this week. I ordered the BB brackets for my alternator and PS pump from ZIP but they are on back order so I can't mount the PS pump yet.
Thanks again and as soon as I hear back from you on whether or not to pull the piston I will get on it and shoot a pic to post so I know I have the right thing to send to you.
Ok bare with me a second. As I read this you are saying that manual brake master cylinder holes are to deep thus the short rod pictured at the top that came with the HB will not work. Just to clarify my MC is for power brakes. So I do or do not need to pull the piston out of the MC and send it to you?
As far as the line adapters go I hope to order them this week. I ordered the BB brackets for my alternator and PS pump from ZIP but they are on back order so I can't mount the PS pump yet.
Thanks again and as soon as I hear back from you on whether or not to pull the piston I will get on it and shoot a pic to post so I know I have the right thing to send to you.
I do have my hydroboost off the car. I can measure the dept of the hole and we can compare how deep you need to be.
I am not at the shop and will not be going there until tomorrow night but I will measure the depth of the hole. Some power master cylinders had shallow holes. some did not.
Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
Norval and Black Rat here is a description of the differant MC
see the differance in the two pistons:
76 and ealier used the deep one and 77 and latter used the shallow one.
see the differance in the two pistons:
76 and ealier used the deep one and 77 and latter used the shallow one.
Last edited by chevymans 77; Nov 13, 2005 at 05:07 PM.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by chevymans 77
Norval and Black Rat here is a description of the differant MC
see the differance in the two pistons:
76 and ealier used the deep one and 77 and latter used the shallow one.
see the differance in the two pistons:
76 and ealier used the deep one and 77 and latter used the shallow one.
Thread Starter
Safety Car
Joined: Oct 2000
Posts: 4,282
Likes: 172
From: Lake Wylie, South Carolina
I got the HB mounted to the firewall today and the clevis connected to the pedal. man that was a real PITA!!! I also pulled the cylinder out of the MC and going by what chevymans77 posted I definately have the deeper pre 77 MC.
Norval I hate to ask you to fab me a new one if I could just get a rebuilt post 77 unit from one of the parts houses. Would you think that would be easier or worth looking into?
Thanks
Wade
Norval I hate to ask you to fab me a new one if I could just get a rebuilt post 77 unit from one of the parts houses. Would you think that would be easier or worth looking into?
Thanks
Wade
Thread Starter
Safety Car
Joined: Oct 2000
Posts: 4,282
Likes: 172
From: Lake Wylie, South Carolina
Norval or anyone else who has purchased the fittings for adapting the HB lines. I contacted www.colemanracing.com looking for part numbers, #ALL48210 6 male to 16 mm fitting with O ring and
#ALL48212 6 male to 18 mm fitting with O ring. They told me that these are MotorState part #'s and that they do not carry them.
Did I go to the wrong coleman racing?
Thanks Wade
#ALL48212 6 male to 18 mm fitting with O ring. They told me that these are MotorState part #'s and that they do not carry them.
Did I go to the wrong coleman racing?Thanks Wade
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by BlackRat
Norval or anyone else who has purchased the fittings for adapting the HB lines. I contacted www.colemanracing.com looking for part numbers, #ALL48210 6 male to 16 mm fitting with O ring and
#ALL48212 6 male to 18 mm fitting with O ring. They told me that these are MotorState part #'s and that they do not carry them. Did I go to the wrong coleman racing?
Thanks Wade
#ALL48212 6 male to 18 mm fitting with O ring. They told me that these are MotorState part #'s and that they do not carry them.
Did I go to the wrong coleman racing?Thanks Wade
I have these parts/adapters in stock in my shop. If you want them I can send them to you and they will cost you what it costs me to replace them
These part numbers are out of my catalogue.
Could to also ask coleman by refering to the sizes I gave
They are listed as GM Power steering Fittings
6 male to 16 mm fitting w/0 ring
6 male to 18 mm fitting w/o ring
They supply our local race shop.
Wade I don't mind making a new shallow piston. It is the piston in the middle of the picture with the spring on it. Send it complete as it so I can screw the spring back on like stock.
It would only take me a day turnaround.
Thread Starter
Safety Car
Joined: Oct 2000
Posts: 4,282
Likes: 172
From: Lake Wylie, South Carolina
Thanks Norval. I actually sent them the full description that you sent me of the fittings. I may have the wrong colemanracing web site. PM me your address and I will get the piston in the mail to you tomorrow.
Thanks
Wade
Thanks
Wade
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: Nov 2000
Posts: 1,477
Likes: 4
From: Florida 33460
Originally Posted by norvalwilhelm
Wade I don't mind making a new shallow piston. It is the piston in the middle of the picture with the spring on it. Send it complete as it so I can screw the spring back on like stock.
It would only take me a day turnaround.
It would only take me a day turnaround.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by BlackRat
Thanks Norval. I actually sent them the full description that you sent me of the fittings. I may have the wrong colemanracing web site. PM me your address and I will get the piston in the mail to you tomorrow.
Thanks
Wade
Thanks
Wade
In my none power master cylinder I have a 1 inch cylinder. If your is power it is I think 1 1/4 inches.
I can duplicate anything quickly but I add about .010 onto the seal dimensions to tighten up the O rings.
Send my your old piston and I will duplicate it, if it is only a 1 inch bore I can send you the one out of my master cylinder and make myself a new one.
Turnaround should be about 1 day.. Send UPS and I would get it in about 3 days, one day to make the new one and right back to you by UPS.
I will PM you my address
It is no problem Wade to make a new piston.
I can certainly take picture of the stock beside the homemade one.
It will be 2024 aircraft quality billet aluminum
Drifting
Joined: Nov 2000
Posts: 1,477
Likes: 4
From: Florida 33460
Originally Posted by norvalwilhelm
I can certainly take picture of the stock beside the homemade one.
It will be 2024 aircraft quality billet aluminum
It will be 2024 aircraft quality billet aluminum
Ill bet its aircraft aluminium in your case
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by norvalwilhelm
2024 is aircraft aluminum. It is not hard to duplicate a stock piston, leave a little extra on the seal surface and drill the hole shallower. No problem at all.
He was suprised when I got in touch with him and told him I would make the piston.
He has the system up and running and again that was a old old post.
Sorry
