Circle track cams

5593 Views 5 Replies 4 Participants Last post by cstraub, Jul 18, 2012

novajoe1973

Discussion Starter · Jul 15, 2012

Is there any advantage/disadvantage to running a "circle track" or "oval track" solid lift cam in a street/strip engine? I plan on buying an elgin solid cam that's noted as an "oval track 3/8-1/2 mile" for a 383 I plan on building. Let me know what you think.

http://www.competitionproducts.com/...pet-Cam-Lifter-Kit-Chev-SB/productinfo/1090M/

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Glenn

· #2 · Jul 15, 2012

Here is the Camshaft specs:

Chev SB
Adv. Duration: 287/295
Duration @ .050": 256/264
Lift: .537/.557
Lobe Separation: 105 LC
Lash Adj.: .026 IN .026 EX

Circle Track Grinds can be some of the most awesome street/strip cam combinations out there, we have Been-there-done-that for 35 years.
Of course, this is providing that everything else in the combination is right too.

Should be a tire-shredder ......

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cstraub

· #3 · Jul 16, 2012

A camshaft has no idea what application it is going in, all it knows is with a given CID, induction, and exhaust system it will make power in a given rpm range.

To label a cam a marine, drag, what ever I think is ridiculous.

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carjai

· #4 · Jul 16, 2012

cstraub said:
A camshaft has no idea what application it is going in, all it knows is with a given CID, induction, and exhaust system it will make power in a given rpm range.

To label a cam a marine, drag, what ever I think is ridiculous.

Great info!!

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novajoe1973

Discussion Starter · #5 · Jul 18, 2012

Sounds good. Thanks for the info guys! I'll be ordering this cam with the edm'd lifters for extra insurance.

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cstraub

· #6 · Jul 18, 2012

Lift is to make power
Duration is to sustain power at a given rpm range
LSA is determined by head flow capabilities and rpm range power is needed
Valve Events are the gate keepers of power, they open and close in relationship to where the piston is given the rpm range.

The cam you have selected base on a moderate cylinder head on a 383 will not feel good until around 3500 rpm. She will peak about 6300 to 6400 rpm.

With a really good head the cam will start around 4000 rpm and make broad power until round 6900 rpm

With a bad set of heads the cam will make power at round 2800 rpm, be very peaky and make power to around 6000 or so.

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