My home inspection of Speedmaster heads
- Thread starter 318willrun
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I just used umbrella seals they fit nice over the guides and lots of clearance inside the spring. They were some I had laying around from years gone by and didn’t have any numbers on the bag. I think they came in a Ford kit cause some of them have 11/32 stems. Kim
Nope, just a comp bag with 16 seals in it.
Agreed. Unfortunately, the old seals have that rubber lining the ID, so I can't get a good measurement on them. I had to go with stem size and guide OD when I picked them out.
j par
Well-hung Member
I guess mine were those red ones as well..
j par
Well-hung Member
No, my phone number is on his computer it hasn't changed since they built by motor 5 years ago.. even can tell me every time I've came in for oil...
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Not to quote anyone above, I sure wouldn't use old rubber umbrellas from days gone by.
Ahhhshucks Mike, I have the right 1s on order. Kim
Some updated info for any interested parties. The jet shop I used to work at has a material analysis gun, I replaced the springs/retainers in my heads, so they're sitting around and I asked my brother to bring a spring and retainer into work and scan them for me.
Gun has a bunch of materials stored, but will give the breakdown for things not in it's database. Retainers came back as 4140, all good. The spring....well, I need him to recheck it, as the breakdown seemed to indicate 01 tool steel. Not something that's used for springs in my experience, but neither is a material that would normally be checked there, so neither was stored in the gun and it gave the breakdown instead.
Gun has a bunch of materials stored, but will give the breakdown for things not in it's database. Retainers came back as 4140, all good. The spring....well, I need him to recheck it, as the breakdown seemed to indicate 01 tool steel. Not something that's used for springs in my experience, but neither is a material that would normally be checked there, so neither was stored in the gun and it gave the breakdown instead.
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MOPAROFFICIAL
Oogliboogli
Oh they use tool steel for springs all the time. There are grade differences.
Good info, I'm certainly not an expert in material selection.
MOPAROFFICIAL
Oogliboogli
Me neither. I'm not an expert in anything as a matter of fact....and If I ever meet someone that says they are.. I walking the other direction. Lol
Thank you for sharing whatever you find out.
Krooser
Building Chinese Free Engines since 1959...
You thinking of Isky "Tool Room Steel"? Just a fancy name for the same materials everyone else uses...
They make tool steel wrist pins also. Kim
MOPAROFFICIAL
Oogliboogli
Oh the good ole tool room springs, that cost 300+ dollars anymore. Isky is great... but a racers brand for sure.
Nah, many use or have used tool steel.
Howard's for instance..
Pro - Series H - 11 Tool Steel Triple Valve Springs; 1.625 Howards Cams 98751-1 | Howards Cams
Chrome silicon, vanduim, all kinds of alloys used in some proprietary mix.
gzig5
Well-Known Member
Spring steel and "tool" steel are simply general descriptions of alloy families that are fairly close to each other. They are heat treatable alloy steels that can be configured to create many different products. Makes for good marketing verbiage but doesn't guarantee performance.
B3422w5
Well-Known Member
The big thing with Isky tool rooms is the endurance testing they go through
Ran a set for 7 years on a 7500 rpm every lap motor( roller cam) and they still tested good.
Good springs are a GOOD investment
Ran a set for 7 years on a 7500 rpm every lap motor( roller cam) and they still tested good.
Good springs are a GOOD investment
MOPAROFFICIAL
Oogliboogli
Agree. Record setters arent using your average hot rod parts. You can spend 2k on isky valve train fairly quick. Quality, reputation and history.
Everything has its place.
B3422w5
Well-Known Member
yep.
I am not the sharpest knife in the drawer, but have learned via the school of hard knocks that using quality parts keeps the hood shut a lot.
MOPAROFFICIAL
Oogliboogli
Since it's a head thread, we can talk valve train parts as they 'could be' upgrades or alternatives... I bought a set of engine pro "nitro black" exhaust valves to replace the ferrea 5000s I was running.. what do you think about those? I hear they hold their shape better under extremes..lol
B3422w5
Well-Known Member
Classic definition of "Expert": Anyone with a briefcase more than 30 miles from home or office.
MOPAROFFICIAL
Oogliboogli
I hear anything less than the 6000 isnt as good 'strength wise ' as a elgin 21-4n pro stock valve. I think the Frerrea 5000 has a better finish than a budget pro stock, but I have also spun them in a press and polished them ...seeing a small gain afterward on the flowbench, just surface finish. Which is pretty much worthless outside of a dyno test magazine rag because as soon as you put miles on it...its not smooth anymore.
aaronk785
Well-Known Member
My speedmaster springs have lost about 600 rpm before float. But I have a solid cam and shift at about 7000 rpm. That's about where they float now. Not saying springs are bad, just not for my combo.
j par
Well-hung Member
So that used to float at 7600?
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