HYD ROLLER CAM Regrinds

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6pak

6pak

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How far would you trust one of these?
Certain lift?
Duration?
Can only cut what is there!

the base circle gets ground away a bit for the extra lift. And that means longer push rods.
AND the lifter drops further in the bore.
Can the base circle get too small?
 
6pak said:
How far would you trust one of these?
Certain lift?
Duration?
Can only cut what is there!

the base circle gets ground away a bit for the extra lift. And that means longer push rods.
AND the lifter drops further in the bore.
Can the base circle get too small?
Click to expand...
One of "what"? WHERE is your example and WHO is the regrinder?
 
6pak said:
How far would you trust one of these?
Certain lift?
Duration?
Can only cut what is there!

the base circle gets ground away a bit for the extra lift. And that means longer push rods.
AND the lifter drops further in the bore.
Can the base circle get too small?
Click to expand...

Nothing wrong with them. Would you 100% be able to reuse the push rods you had with a new cam?
 
RustyRatRod said:
One of "what"? WHERE is your example and WHO is the regrinder?
Click to expand...
Ebayer selling regrinds form a “reputable” cam shop around Dallas.
I believe you can grind them a bit, but when you approach higher lobe lifts, grinding away at the base circle, something is not going to go right.
Yes, Im certain longer pushrods are going to be needed.
 
6pak said:
Ebayer selling regrinds form a “reputable” cam shop around Dallas.
I believe you can grind them a bit, but when you approach higher lobe lifts, grinding away at the base circle, something is not going to go right.
Yes, Im certain longer pushrods are going to be needed.
Click to expand...
I want a LOT more info than that before I trust a regrind. I've had Oregon Cam Grinders do several for me. Ken Heard has probably forgotten more than a lot of people will ever know about cam grinding. That ebay thing sounds like a fly by night job. Call Ken.
 
RustyRatRod said:
I want a LOT more info than that before I trust a regrind. I've had Oregon Cam Grinders do several for me. Ken Heard has probably forgotten more than a lot of people will ever know about cam grinding. That ebay thing sounds like a fly by night job. Call Ken.
Click to expand...

Gotcha. Will do.
 
Is Oregon cams still in business I have had no luck of late trying to pull up their website on the internet.
RustyRatRod said:
I want a LOT more info than that before I trust a regrind. I've had Oregon Cam Grinders do several for me. Ken Heard has probably forgotten more than a lot of people will ever know about cam grinding. That ebay thing sounds like a fly by night job. Call Ken.
Click to expand...
 
K.O. SWINGER said:
Is Oregon cams still in business I have had no luck of late trying to pull up their website on the internet.
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Yes. Their webmaster leaves a lot to be desired. If you call Ken, he will email you all of their current grinds lists.

And on the subject of pushrods, you may or may not need longer ones. It's all dependent on the build. The current slant 6 I have in Vixen running right now did not need them. I have tons of adjustment on the factory adjuster screws, but what helped me was the head has been milled over .150" so that helped negate the need for new pushrods. Don't just assume. Sometimes Ken can make a regrind where you will not need a pushrod change. Of course, if you're running original non adjustable rockers, longer pushrods will just about be a necessity. Either way, I would MEASURE, regardless.
 
i have a regrind cam in my ride. running stock nonadjustable rockers i had to buy .080 valve lash caps because of the base circle on the regrind. longer pushrods were more expensive than the lash caps
 
Rat Bastid said:
Yes, but with a new owner. Kenny is now a slack ***, time clock punching, working class stiff. And he said he likes it.
Click to expand...
LOL That's about verbatim what he told me when we spoke last.
 
6pak said:
Ebayer selling regrinds form a “reputable” cam shop around Dallas.
Click to expand...

RustyRatRod said:
That ebay thing sounds like a fly by night job
Click to expand...
If it’s the same one that does cylinder heads from around Dallas, I would stay far away. Have a friend that ordered magnum cylinder heads from an eBay refurb shop in Dallas and checked them out. One set didn’t even have stem seals installed and neither would hold washer fluid past the valves. The guides were still oval. I’m amazed he was able to send them back for an immediate refund. I would be surprised if they ground a cam and it were still good enough to use for a decent core for a real cam grinder.
 
Garrett Ellison said:
If it’s the same one that does cylinder heads from around Dallas, I would stay far away. Have a friend that ordered magnum cylinder heads from an eBay refurb shop in Dallas and checked them out. One set didn’t even have stem seals installed and neither would hold washer fluid past the valves. The guides were still oval. I’m amazed he was able to send them back for an immediate refund.
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Does Odessa/Clearwater have a shop in Dallas? LMAO
 
Probably been said but anyone who grinds their own cams can grind 'something' on your core. As you said, lsa is limited in how far it can be fiddled.
 
Same friend who had to send the magnum heads back bought one of the engine tech cams and sent it to Ken. He got a .506 (1.6 magnum rocker ratio) 209/214 @.050 on a 108 LSA out of it. Going in 5.9 and will be used in an '85 club cab 4X4 used for heavy towing.
 
Garrett Ellison said:
Same friend who had to send the magnum heads back bought one of the engine tech cams and sent it to Ken. He got a .506 (1.6 magnum rocker ratio) 209/214 @.050 on a 108 LSA out of it. Going in 5.9 and will be used in an '85 club cab 4X4 used for heavy towing.
Click to expand...

I bought a Hughes regrind years ago and it was 214/216 w .510 valve lift. - worked great.

This ebay seller has regrinds w 228* @ 0.050” w 1.5 rocker .525” valve lift -

I was just wondering how much can you regrind a cam?
Regrinding a stock cam,
You don’t have a lot to work with.
 
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6pak said:
I bought a Hughes regrind years ago and it was 214/216 w .510 valve lift. - worked great.

This ebay seller has regrinds w 228* @ 0.050” w 1.5 rocker .525” valve lift -

I was just wondering how much can you regrind a cam?
Regrinding a stock cam,
You don’t have a lot to work with.
Click to expand...

Have you called Ken at Oregon Cams? He'll tell you how far you can go on a regrind. When I spoke to him several years ago, he said he couldn't go as far as I needed at the time and I was looking for something in the 230* @ 0.050", .550" lift range.

There are too many variables for you to get an answer off the internet. Give him a call at get it straight from the horses mouth.
 
Ken also reground a stock magnum cam for him that he got from me. I emailed him and he gave which P/Ns for the different LSA's and a neighborhood approximation of how much lift and duration he can get on the stock core.
 
I'm in the process of installing a reground OEM Magnum cam that Bullet Cams did. Told them what I wanted to do and let them decide. They gave me a 262/267 grind on it. Didn't ask how big they could have gone, so no idea if they maxed it out.

I did need slightly longer pushrods to work with the non-adjustable Magnum rockers. But I got some Elgin HD ones from a local auto parts store, for an '82 Mustang 302 for like $90. Could have got garden variety ones for maybe $32?
 
There is a mob over here that will build the lobes up by welding for more radical regrinds, but it's something im sketchy on - seen it go south on a set of porche cams, it was messy.
Some run around just fine with the built up lobes but I'd rather run a smaller cam without the risk.
 
I know that the welding works pretty well in Go Kart racing. I know a welding instructor who uses a high manganese TIG rod that makes a harder weld than the base metal. Of course a Briggs flat tappet is a whole different world of spring pressure than a high performance hydraulic roller. Our local machine shop operator showed me a cam design that Isky used to offer with some type of mystery material lobe on the nose that was light grey that he wishes someone would make start producing again. It looked like the Schubeck lifter facing ceramic material.
 
Many top race teams will have their race cams reground as a maintenance item.

Mike Jones @ Jones Cams can regrind any cam. Mike told me he can only move the duration a couple degrees up and down.
 
6pak said:
I bought a Hughes regrind years ago and it was 214/216 w .510 valve lift. - worked great.

This ebay seller has regrinds w 228* @ 0.050” w 1.5 rocker .525” valve lift -

I was just wondering how much can you regrind a cam?
Regrinding a stock cam,
You don’t have a lot to work with.
Click to expand...
That's just not true. A cam grinder can put that lobe wherever he wants on the core.
 
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