Inline 6 Cam Selection - Chevy Nova Forum
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Old 17th-July-2008, 02:28 AM   #1
Nova1963
 
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Inline 6 Cam Selection

What type of aftermarket cams are you Inline 6 guys running? It seems that Comp Cams makes single pattern cams while Crane offers dual pattern. What do the experts recommend?
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Old 17th-July-2008, 02:45 AM   #2
N and OVA

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In my 72' (250cid) My total engine package is as follows:

Numbers matching block and head
Block bored .30 over
Head fully ported and polished
1.94 intake valves
1.84 stainless exhaust valves
Completely new valve train with double springs
Comp Cam's 252H
Flat-top pistons
Offenhauser triple-one barrel intake
Langdon's Dual exhaust manifolds
+TH350 trans & shift kit

As far as the cam goes, I have had great results with the Comp 252H
It isnt realllly aggressive but it gives a nice small lope at idle, and better-than-stock bottom end power, with a HUGE gain in top end acceleration. (60-80 pretty quick)
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Old 17th-July-2008, 04:09 AM   #3
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Quote:
Originally Posted by N and OVA View Post
In my 72' (250cid) My total engine package is as follows:

Numbers matching block and head
Block bored .30 over
Head fully ported and polished
1.94 intake valves
1.84 stainless exhaust valves
Completely new valve train with double springs
Comp Cam's 252H
Flat-top pistons
Offenhauser triple-one barrel intake
Langdon's Dual exhaust manifolds
+TH350 trans & shift kit

As far as the cam goes, I have had great results with the Comp 252H
It isnt realllly aggressive but it gives a nice small lope at idle, and better-than-stock bottom end power, with a HUGE gain in top end acceleration. (60-80 pretty quick)

HP rating?
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Old 17th-July-2008, 11:31 AM   #4
N and OVA

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^^^^^^^
As far as my HP rating, I haven't any clue yet.
The book shows 105hp as the stock number.
I'm estimating that I doubled it, just by feel.
But as we all know, that's not necessarily an
accurate way to tell. It will be dyno'd soon.
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Old 17th-July-2008, 04:23 PM   #5
Bruce
 
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Clifford Research is another source for inline cams. The on-line catalog is lacking details. They used to have from 250 up to 280 duration hydraulic and mechanical versions, but you may need to call them to see what is actually available.
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Old 17th-July-2008, 05:09 PM   #6
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This is where I got mine:
http://www.schneidercams.com/cams/46.htm

264-H 264 duration 214 @ .050" .498" lift 110 lobe center $150.00 + shipping ( This was a 292" Chevy 6 cyl.)
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Old 17th-July-2008, 11:56 PM   #7
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65Nova4door,

How do you like the cam? What is the idle quality/speed like? Did this cam help low end, mid range, high end? Thanks for your time!
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Old 18th-July-2008, 12:49 AM   #8
N and OVA

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Two other things to keep in mind when running the L6

If you are running an automatic trans, your cam needs to be a little less agressive than if you are running a manual.

Also, one should keep their cam selection semi-proportional to the engine's displacement. A 292 can run a lumpier cam than a 250 can, and so on.
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