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Topic author
Mark Gregush
- Posts: 5370
- Joined: Sat Jan 05, 2019 1:57 pm
- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- Board Member Since: 1999
Post
by Mark Gregush » Sat Apr 13, 2019 12:32 pm
Right now I am using the original Chevrolet valve springs with newer Ford keepers/modern valves. Problem is the spring is not staying center on the keeper, the springs inside diameter is larger then the boss on the keeper. The original rocker arms were not made real strong so do not want to get too aggressive with both open and closed spring pressure and break a rocker. Originally the spring were about 40 closed and 70 open.
http://chevy.oldcarmanualproject.com/ch ... o/2804.htm
I am not looking for high speeds, mostly 40 and under. At this point am more worried about the springs being off center and wearing the guides faster then needed. Right now the compressed and open spring length are close to stock. I made my own two piece push rod setup if that changes anything. I don't have any size numbers for free length, ID limits etc in front of me but can get them as needed.
Any suggestions?
Thanks
Oh! I did spend time looking thru the valve spring listing in a couple of catalogs, but ended up more lost then when I started.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1948 Ford F2 pickup
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Henry K. Lee
- Posts: 5474
- Joined: Sun Jan 06, 2019 11:09 am
- First Name: Henry
- Last Name: Lee
- * REQUIRED* Type and Year of Model Ts owned: Many
- Location: South Pittsburg, TN
- MTFCA Life Member: YES
Post
by Henry K. Lee » Sat Apr 13, 2019 1:38 pm
Rob when using the stock Chevy valve you need to use the original slotted keeper or that will happen. They are rectangular in shape and longer.
All the Best,
Hank
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Chad_Marcheese
- Posts: 255
- Joined: Tue Jan 15, 2019 6:06 am
- First Name: Chad
- Last Name: Marcheese
- * REQUIRED* Type and Year of Model Ts owned: 1925 Cut Off Touring / Pickup, 1923 Doodlebug / 1924 Speedster Gow Job
- Location: Upstate, NY
- Board Member Since: 2005
Post
by Chad_Marcheese » Sat Apr 13, 2019 1:58 pm
Mark, can't say I have an answer yet, but you did answer a question for me---open and closed pressures on the stock springs. I was looking at a Comp Cams inner valve spring as a possible replacement. I will have to double check the specs now.
Finding the right spring retainer is the key. Stock modern small block chevy valves are 11/32 diameter. So you need a retainer that fits the valve, fits the spring, AND has either a 7 degree or 10 degree lock setup to fit whatever locks your using.The issue I came across is they are a decent amount short than the OE 1928 Chevy Valves. I believe I was looking at some mid 60's oldsmobile valves as a possible modern replacement.
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Topic author
Mark Gregush
- Posts: 5370
- Joined: Sat Jan 05, 2019 1:57 pm
- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- Board Member Since: 1999
Post
by Mark Gregush » Sat Apr 13, 2019 4:05 pm
I think it was the Old's valves I used.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1948 Ford F2 pickup
