[DeTomaso] BILLET ROLLER CAM & Comp
CamsCarbon-Poly-CompositeReplacement Gear
Thomas Tornblom
Thomas.Tornblom at Hax.SE
Mon Nov 27 18:06:50 EST 2006
Ken Green wrote:
> Thomas,
>
> I cut this from the Crane web site:
>
>
> /These drive gears are made from high silicon copper alloy
> ("aluminum-bronze") and precision machined. They are required when using
> an 8620 steel billet cam. Certain special Crane roller camshafts are
> manufactured using an "Iron Gear" pressed onto the steel billet cam.
> These special cams DO NOT REQUIRE an aluminum bronze distributor drive
> gear. Refer to the specific camshaft application section of catalog.
> (Iron Gear cams' part numbers have an "IG" suffix at the end of their
> part numbers) Note: The "Shaft Diameter" dimension referred to is the
> portion of the distributor shaft that the gear registers on. It may be
> necessary to remove the original gear to measure the shaft diameter
> correctly./
>
>
> I'm not sure exactly what materials are typically used for cams
> and dist gears, cast iron? It looks like if you have a Crane cam with
> an "IG" suffix, it can use a standard gear. I guess someone
> knowledgeable in metalugy could help here.
>
> I had assumed that Crane (and others) don't sell a lot of roller
> cams, so they use a different material which is easier to machine, but
> that's just a guess. I think I'm missing something and maybe someone
> can describe the difference between materials and manufacturing a
> standard versus a roller cam?
I cut from this Crane web page:
http://www.cranecams.com/?show=browseParts&lvl=3&prt=113&showAll=yes
"Steel Distributor Gears
Crane Cams now offers six part numbers of precision machined, steel
distributor gears for popular Ford engines using steel roller camshafts.
Roller lifter cams are made from either induction hardened steel or
carburized steel. Neither of these materials are compatible with the
normal stock distributor gears. In the past "bronze" distributor gears
were used. For street applications these gears wear at an excessive rate
and have to be replaced on a regular basis.
By using modern heat treating and manufacturing processes, Crane Cams
has developed a series of steel distributor gears that are compatible
with both induction hardened and carburized steel roller lifter cams.
Crane Cams now makes it possible to use a steel distributor gear that
provides OEM-style life-span, eliminating the need to frequently replace
bronze alloy gears. These new Crane steel gears are available for most
Ford engines for both stock and aftermarket distributors.
The use of these gears on camshafts that have been previously run with
other types or materials of gears, or the unnecessary use of high
volume/high pressure oil pumps, can be severely detrimental to the life
of the camshaft gear.
Note: The "Shaft Diameter" dimension referred to is the portion of the
distributor shaft that the gear registers on. It may be necessary to
remove the original gear to measure the shaft diameter correctly."
I believe Asa-Jay runs one of these, and he checked his gear after a
while and found no abnormal wear.
My cam was new, and I'm using a stock type oil pump.
>
> Ken
>
Thomas
>
>
>
> */Thomas Tornblom <Thomas.Tornblom at Hax.SE>/* wrote:
>
> Ken Green wrote:
> > John,
> >
> > Based on past comments fro others, I thought that semi custom
> billet cams (typically, after market roller cams) require the softer
> gears (like bronze gears), and (I think) cast iron cams are harder
> and use harder gears. If that's correct, or at least close, you may
> be able to tell what gear you need by just looking at the cam.
> >
> > I thought Crane was making a gear that was support to last longer
> than a bronze gear? The Crane catalog shows an aluminmum bronze
> alloy gear.
> >
> > Can someone comment on the above?
>
> I'm using a Crane hydraulic roller cam, with Cranes recommended steel
> gear. I haven't looked at it since I started the engine up this spring,
> but it has been to France and back this summer, which is around 2300 km
> one way.
>
> Thomas
>
>
> >
> > Ken
> >
> > "John Bentley (jab)" wrote:
> > MD,
> >
> > this sounds like a question for Dan, but you should use the gear
> > recommended by Comp Cams! I thought they had a steel gear for their
> > steel cams??? I have the three different part numbers around here
> > somewhere. If its cut correctly, a would think a steel gear would
> be a
> > good choice.
> >
> > I have a steel, solid-roller cam and use the bronze gear. I would
> like
> > to use the steel gear, but I could never get the cam core info from
> > Hall, so I don't know who made the cam or what the material is! I'm
> > stuck with bronze for now........
> >
> > Unfortunately, changing a gear in a Cleveland isn't much fun. You
> have
> > to make a measurement from the mounting flange down a particular
> > distance to the face of the gear and drill the gear and shaft
> where you
> > want it located. That makes changing the gear later a pain unless you
> > have several gears done at once. Maybe someone has a better
> system????
> > Let me know......
> >
> > JB
> >
> >
> >
> > -----Original Message-----
> > From: detomaso-bounces at realbig.com
> [mailto:detomaso-bounces at realbig.com]
> > On Behalf Of Mad Dog Antenucci
> > Sent: Monday, November 27, 2006 9:44 AM
> > To: Mike Thomas; detomaso at realbig.com
> > Subject: RE: [DeTomaso] BILLET ROLLER CAM & Comp
> > CamsCarbon-Poly-CompositeReplacement Gear
> >
> > Love back at ya Mike! ;-]>
> >
> > Okay I still need the question answered.....DAN, RUSS, MIKE,
> > DICK.....at least one of you slackers should know the answer to this
> > question.
> >
> > MD
> >
> > Mike Thomas wrote:
> > Ouch, sorry.
> > Was reading the first line in the second paragraph, and just figured
> > you needed a hard time.
> > Mike
> >
> >
> > ---------------------------------
> > From: Mad Dog Antenucci [mailto:teampantera at yahoo.com]
> > Sent: Sunday, November 26, 2006 3:21 PM
> > To: Mike Thomas; detomaso at realbig.com
> > Subject: RE: [DeTomaso] BILLET ROLLER CAM & Comp Cams
> > Carbon-Poly-CompositeReplacement Gear
> >
> >
> >
> > Look at the 1st paragraph dumb ass! ;-]>
> >
> > It's a bronze gear - billet cam.
> >
> >
> >
> > Mike Thomas wrote:
> > MD
> > Um, I hate to ask, but what is a "bronze MSD billet steel distributor
> > gear"?
> > Is it bronze or steel?
> > Enquiring minds want to know . . .
> >
> > Mike Thomas
> >
> > -----Original Message-----
> > From: detomaso-bounces at realbig.com
> [mailto:detomaso-bounces at realbig.com]
> > On
> > Behalf Of Mad Dog Antenucci
> > Sent: Sunday, November 26, 2006 1:22 PM
> > To: detomaso at realbig.com
> > Subject: [DeTomaso] BILLET ROLLER CAM & Comp Cams
> > Carbon-Poly-CompositeReplacement Gear
> >
> > RUSS, DR DAN, MIKET, D*CK,
> >
> > One of the drawbacks to a steel billet hyd roller cam and/or a HV oil
> > pump
> > is the need to regularly check and if necessary replace the
> bronze gear
> > if
> > you are racing....good news is they are cheap.
> >
> > The bronze MSD billet steel distributor gear on my engine (shows
> slight
> > wear) so its a good time to replace the gear while we have the
> car apart
> > this winter waiting for the Mike Trusty EFI. Is anyone on the
> List using
> > a
> > carbon-poly composite replacement distributor gear on their
> billet Comp
> > Roller Cam???
> >
> > I didn't see a reference for the 351-C in the Comp Cams catalog
> online
> > but
> > doesn't mean one doesn't exist..... I tried using the replacement
> steel
> > gear
> > a local dyno shop recommended a couple years ago and that only
> proceeded
> > in
> > chewing up the billet cam....dumb ass mistake #479 as billet
> roller cams
> > ain't cheap to replace.
> >
> >
> >
> >
> >
> >
> > Mad Dawg Antenucci
> > Team Pantera Racing
> > The 1st & still the only vintage race team in open road racing
> > www.teampanteraracing.com
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> >
> > Mad Dawg Antenucci
> > Team Pantera Racing
> > The 1st & still the only vintage race team in open road racing
> > www.teampanteraracing.com
> >
> >
> >
> > Mad Dawg Antenucci
> > Team Pantera Racing
> > The 1st & still the only vintage race team in open road racing
> > www.teampanteraracing.com
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> --
> Real life: Thomas Törnblom Email: Thomas.Tornblom at Hax.SE
> Snail mail: Banvallsvägen 14 Phone: +46 18 290 290
> S - 754 40 Uppsala, Sweden Cellular: +46 70 261 1372
> Fax: +46 18 290 291
>
>
> !DSPAM:456b673863171209923907!
--
Real life: Thomas Törnblom Email: Thomas.Tornblom at Hax.SE
Snail mail: Banvallsvägen 14 Phone: +46 18 290 290
S - 754 40 Uppsala, Sweden Cellular: +46 70 261 1372
Fax: +46 18 290 291
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