BBC Billet roller cam"can be used w/solid OR hyd roller lifters"
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BBC Billet roller cam"can be used w/solid OR hyd roller lifters"

  1. #1
    AKA Blownjet 468 Blowncat 509's Avatar
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    Default BBC Billet roller cam"can be used w/solid OR hyd roller lifters"

    Was cruising the net the other night, looking at ad's on RJ, when I came
    across a Herbert ad for a roller cam, and it stated " can be used with solid
    or hyd. roller lifters" Sounds a little strange to me, wouldn't that cam be a
    little lazy with solid lifters then? would seem to me that the ramp aceleration rates would have to be pretty soft, to allow it to work w/ the
    hyd rollers. and when solids were run, can't really see that it would be optimum for a solid app. anybody have any thoughts on this? -C.S. maybe?

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    Hyd roller lobe on a billet shaft or a typo. To use the solid rollers you would have a lite lash setting.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    It's what we do BDMarine's Avatar
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    You might be surprised at how quick the ramp is on some hydraulic roller lobes.
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    B & D Marine Performance
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    AKA Blownjet 468 Blowncat 509's Avatar
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    I figured the lash part, but how could the actual profile be suited for both
    lifter apps? (it's not a typo, check it out) ad in the camshaft section of
    racing junk.com. (and where would you start w/lash if you did try to do
    this?) NOT that I would even consider it, in fact, I plan on getting with you on camshaft selection for my whippled 509 soon! was looking for
    specs , got a message back from [email protected] whipple, the cam he suggested
    seems kinda big (240/[email protected])I really don't think that fits in the 2000-6000 range I am shooting for,

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    Quote Originally Posted by Blownjet 468 View Post
    I figured the lash part, but how could the actual profile be suited for both
    lifter apps? (it's not a typo, check it out) ad in the camshaft section of
    racing junk.com. (and where would you start w/lash if you did try to do
    this?) NOT that I would even consider it, in fact, I plan on getting with you on camshaft selection for my whippled 509 soon! was looking for
    specs , got a message back from [email protected] whipple, the cam he suggested
    seems kinda big (240/[email protected])I really don't think that fits in the 2000-6000 range I am shooting for,
    When using a hyd roller profile lash is around .002" intake and .004" exhaust cold on an aluminum headed engine.

    Cylinder heads will play a big part in determining the camshaft. The better the head the smaller the cam need.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    It's what we do BDMarine's Avatar
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    Quote Originally Posted by cstraub View Post
    When using a hyd roller profile lash is around .002" intake and .004" exhaust cold on an aluminum headed engine.

    Cylinder heads will play a big part in determining the camshaft. The better the head the smaller the cam need.
    Exactly what we do. On a side note, I was talking with an engineer at comp about another camshaft and got on this subject. they now have a "dual purpose" lobe that will use a hyd or solid roller. Lash on the solid is .006 & .008 cold....
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    AKA Blownjet 468 Blowncat 509's Avatar
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    so is this a common thing ? I've just never seen it done before, is there
    an advantage to doing this? what gains could you expect? throttle response? higher rpm potential? is it really worth it, or is it a poor boy
    hop up trick? HAVE YOU ever tried it, or suggested it? (just curious)

    ps- 509 heads will just be the iron rect. port heads, with all the work
    being concentrated in the bowl/ under valve area and 2.250/ 11/32 valves
    installed ( maybe a little chamber work also)

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    Quote Originally Posted by Blownjet 468 View Post
    so is this a common thing ? I've just never seen it done before, is there
    an advantage to doing this? what gains could you expect? throttle response? higher rpm potential? is it really worth it, or is it a poor boy
    hop up trick? HAVE YOU ever tried it, or suggested it? (just curious)

    ps- 509 heads will just be the iron rect. port heads, with all the work
    being concentrated in the bowl/ under valve area and 2.250/ 11/32 valves
    installed ( maybe a little chamber work also)
    It was started back in the 80's with Ford Stocker's. They would run solid roller lifters on the 5.0 power plants. Secret held for several years.

    Will need the flow numbers on the heads but USUALLY with OEM irons and a blower you need more split, but then again you may have a really good ported set of exhaust.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Senior Member CK7684's Avatar
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    Quote Originally Posted by Blownjet 468 View Post
    I figured the lash part, but how could the actual profile be suited for both
    lifter apps? (it's not a typo, check it out) ad in the camshaft section of
    racing junk.com. (and where would you start w/lash if you did try to do
    this?) NOT that I would even consider it, in fact, I plan on getting with you on camshaft selection for my whippled 509 soon! was looking for
    specs , got a message back from [email protected] whipple, the cam he suggested
    seems kinda big (240/[email protected])I really don't think that fits in the 2000-6000 range I am shooting for,
    The cam I'm running now is 254* @.050 and pulls hard in that range. I'm using Edelbrock oval port (or rectoval as they call them)...

  12. #10
    cfm
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    Quote Originally Posted by Blownjet 468 View Post
    was looking for
    specs , got a message back from [email protected] whipple, the cam he suggested
    seems kinda big (240/[email protected])I really don't think that fits in the 2000-6000 range I am shooting for,
    Dustin has a pretty good handle on camshafts for Whipple SC'd motors. This is, of course, what he does for a living. He is a Whipple, after all.

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    AKA Blownjet 468 Blowncat 509's Avatar
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    Quote Originally Posted by CK7684 View Post
    The cam I'm running now is 254* @.050 and pulls hard in that range. I'm using Edelbrock oval port (or rectoval as they call them)...

    With a Bravo?

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    New here Beer:30's Avatar
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    Quote Originally Posted by Blownjet 468 View Post
    With a Bravo?
    Not for long
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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