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Steel Camshaft Material

Started by N/A-PWR , Jan 17 2013 04:50 AM

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35 replies to this topic

#1 N/A-PWR

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Posted 17 January 2013 - 04:50 AM

Hi All,
As I am getting a Comp Cam made as a 41/73, the material is needed.
Steel Billet Camshaft Material is requested by Comp Cams,

'Quote' I will see if there is anything in billet.. What material? 8620? 'end Quote'

Can anyone help with the steel type material number?
Best Regards Dave I

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#2 _oldjohnno_

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Posted 17 January 2013 - 07:26 AM

8620 is probably the most common material for roller cores - I'm assuming this is for a solid roller. Austempered ductile iron ("cast") is fine for most flat tappet cams (including nearly any remotely sensible Holden six cam) and for hydraulic rollers with moderate spring pressures and rpms. Don't forget to use the appropriate oil pump gear with a steel core and be prepared to change it from time to time.

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#3 _Ned Loh_

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Posted 17 January 2013 - 07:44 AM

Dave,

what engine is the cam for?

Don't know the full answer to your original question (sorry), but keep in mind that certain camshaft treatments go hand in hand with certain materials. Billet material is the sort of thing you'd expect the cam company to be telling you (based on the application and their experience), not asking you.

Cheers.

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#4 _oldjohnno_

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Posted 17 January 2013 - 08:57 AM

material is the sort of thing you'd expect the cam company to be telling you (based on the application and their experience), not asking you.

Exactly.

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#5 N/A-PWR

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Posted 17 January 2013 - 12:12 PM

Thank-you oldjohnno and Ned Loh,
HOLDEN SIX and I will check for the Oil treatments recommended Ned.
Well done Fella's - So I looked up Google and seen lots of company's using the '8620' material for the Solid Roller Cam, return eMail sent.
So then I seen that Comp Cams have the Roller lifters too:-

8620 steel alloy body

9310 steel alloy wheels

These are not for a Six:-
Posted Image

http://www.compcams.com/Products/CC-'Elite%20Race'-0.aspx

Thank-you again for pointing me in the right direction. Dave I

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#6 _Ned Loh_

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Posted 17 January 2013 - 12:38 PM

HOLDEN SIX and I will check for the Oil treatments recommended Ned.

Have Comp confirmed they will make you a steel billet cam?

Oh, and I didn't mean oil treatments. I meant heat treatment (of the camshaft). Ask your cam company if they recommend any sort of heat treatment for the cam material they end up using.

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#7 N/A-PWR

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Posted 17 January 2013 - 01:59 PM

Have Comp confirmed they will make you a steel billet cam?

Oh, and I didn't mean oil treatments. I meant heat treatment (of the camshaft). Ask your cam company if they recommend any sort of heat treatment for the cam material they end up using.

OK Ned Loh,
I will keep you posted here on the outcome and thank's for the advice. Dave I

p.s. 'Comp Cam' Holden Six Cores are from their Supplier/s.

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#8 N/A-PWR

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Posted 18 January 2013 - 01:53 AM

Have Comp confirmed they will make you a steel billet cam?

Oh, and I didn't mean oil treatments. I meant heat treatment (of the camshaft). Ask your cam company if they recommend any sort of heat treatment for the cam material they end up using.

Hi Ned Loh,
Just got confirmation from 'Comp Cams' that they use the '8620 Grade Billet' for both their Hydraulic and Solid Cam Grinds.
Also the Cores are already Heat Treated, now that is great News. Dave I

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#9 _Ned Loh_

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Posted 18 January 2013 - 07:11 AM

Hi Ned Loh,
Just got confirmation from 'Comp Cams' that they use the '8620 Grade Billet' for both their Hydraulic and Solid Cam Grinds.
Also the Cores are already Heat Treated, now that is great News. Dave I

Seem to have two threads going along similar lines.

Ok, thanks for letting me know.

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#10 _WYLDLC6_

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Posted 18 January 2013 - 08:35 AM

Just a question, how is the core only heat treated. It may be stress relieved as 8620 is commonly used for nitriding.
8620 in pure form is reasonaly tough but not a lot of hardness, maybe 20 rc.
Cheers Chris.

Edited by WYLDLC6, 18 January 2013 - 08:41 AM.

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#11 _oldjohnno_

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Posted 18 January 2013 - 09:51 AM

Just a question, how is the core only heat treated. It may be stress relieved as 8620 is commonly used for nitriding.
8620 in pure form is reasonaly tough but not a lot of hardness, maybe 20 rc.
Cheers Chris.

It's induction hardened. Any other surface treatments like nitriding or parkerising are separate processes.

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#12 _WYLDLC6_

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Posted 18 January 2013 - 10:02 AM

Dave,

what engine is the cam for?

Don't know the full answer to your original question (sorry), but keep in mind that certain camshaft treatments go hand in hand with certain materials. Billet material is the sort of thing you'd expect the cam company to be telling you (based on the application and their experience), not asking you.

Cheers.

Ok. That would make sense. Induction and tempered. Interesting. I wonder what kind of depth they get. Anymore than 2-3mm would surely be overkill.

Edited by WYLDLC6, 18 January 2013 - 10:04 AM.

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#13 _oldjohnno_

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Posted 18 January 2013 - 12:34 PM

It can be quite deep, apparently insufficient depth can lead to surface cracks and flaking in the long term.

Again, the customer shouldn't have to concern himself with these decisions, he should be able to simply follow the cam companies recommendations. And while it may seem some of the Comp guy's answers aren't all that clear you have to remember that (and I don't want to put too fine a point on this) the quality of his advice can only be as good as the quality of the information that he's given to work with... which sometimes isn't all that flash.

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#14 _WYLDLC6_

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Posted 18 January 2013 - 12:55 PM

You will generally always get 2-3mm min depth with induction hardening, flaking/cracking will only happen if untempered. There's probably more stresses involved with straightening after hardening. Just find it interesting that they go down the induction path.
Cheers Chris.

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#15 N/A-PWR

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Posted 18 January 2013 - 10:16 PM

Hi All,
New Information:-
Comp Cams have two main suppliers of Billet Cores. Dave I

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#16 N/A-PWR

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Posted 23 March 2013 - 04:44 PM

Hi All,
With no Luck from Comp Cams, I now have asked Tighe Cams for a price on the:-
900C 79 51 51 79 310 310 274 274 .550" .550" .030" .028" Road race 4500-8000 rpm.
http://www.tighecams.com.au/cars.htm

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#17 _JimAndrews_

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Posted 29 March 2013 - 08:48 PM

for gas wheels with average springtime demands and rpms. Don't forget to use the appropriate oil push equipment with a metal primary and be prepared to change it every now and then . . . . . . . . .

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#18 _oldjohnno_

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Posted 31 March 2013 - 08:52 AM

for gas wheels with average springtime demands and rpms. Don't forget to use the appropriate oil push equipment with a metal primary and be prepared to change it every now and then . . . . . . . . .

Intriguing post that appears to have been translated from something other than English. I took it to mean "for normal (steel-core) roller cams don't forget to use a bronze oil pump drive gear and be prepared to change it every now and then"

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#19 S pack

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Posted 31 March 2013 - 09:53 AM

Intriguing post that appears to have been translated from something other than English. I took it to mean "for normal (steel-core) roller cams don't forget to use a bronze oil pump drive gear and be prepared to change it every now and then"

Must have been translated from Mazda RX7 Japanese into Chevy American English? Pity he wasn't able to translate it into Holden Australian English, LOL.

Ever thought of a job as a translator John? Looks like you'd be good at it. haha.

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#20 N/A-PWR

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Posted 31 March 2013 - 10:51 AM

Hi All and thank-you JimAndrews,
Here is the reply from Dean and the website says this,

Notes -

- Bronze Gears must be used on steel camshafts.

- These profiles chosen because of lower lift.

- For more profiles see Chevrolet s/b roller.

From: "Dean Tighe" <[email protected]>
Sent: Monday, March 25, 2013 5:28 AM
To: "'Dave I'"
Subject: RE: Website Enquiry

> Good Morning ,
> The Holden 202 roller camshaft with the 900c is $720.00 Inc gst
> We have a large range of profiles not listed on the Web site if you would
> like other options
> But the 900c does work well in the 202 .
> Regards
> Dean Tighe
> Ivan Tighe Engineering Pty Ltd
> ABN 46 009 747 139 t/a TIGHE CAMS
> 47 Westgate Street
> Wacol Qld 4076, Australia
> Tel (07) 3271 6001
> Fax (07) 3271 6005
> Email: [email protected]
> www.tighecams.com.au