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Author
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Topic: cam, what cam?
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goldenbob
Journeyman Posts: 86
From: medford, or., United States
Registered: Jun 2002
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posted 02-27-2004 11:09 AM
  
Now that I have my engine torn down, a friend of mine is offering me a roller cam he has had sitting on his shop shelf...it's a "cam motion" solid roller cam with .050 dur 232 in.
236 ex. lift 560 in.
562 ex. I would love to try it (he has the solid roller lifters for it too), only wants $200 for it (he owes me one). He also has a fly cutter in case we need to cut the pistons. What do you guys think? Is this too much cam? I think this might get me in the high 12's (so far 13.29 @ 103)... ------------------
67 coupe (my first car in '78)
10:1 302, 4spd, 9" (TrueTrac)posi 4.11
windsor jr heads*
*(mildly ported)
270H cam .50" lift
crane rollers
performer rpm (match ported)
holley 750 (#4160)
hooker super comp.
full msd
CE 90/10 front shocks Rancho adj. Rear
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 02-27-2004 12:46 PM
Bob,I think I would run the solid roller. Make sure your springs are up to it though.  SteveW
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goldenbob
Journeyman Posts: 86
From: medford, or., United States
Registered: Jun 2002
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posted 02-27-2004 03:58 PM
Thanks Steve, anyone have any reasons why I shouldn't run the solid roller...
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powrshftr
Journeyman Posts: 77
From: Sarnia,Ontario,Canada
Registered: Apr 2003
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posted 02-28-2004 09:46 AM
Like Steve said,just make sure you've got the right springs.The only reason to NOT run it would be if you really hate going fast! 
Scott------------------
Turbo'd '66 Mustang coupe
-306ci Comp hyd.roller cam,Victor jr.,GT-40 hds,
BIGS 740cfm blowthru carb
-Toploader 4-speed
-3.50 Detroit Locker
-Torq-Thrust 'D''s & BFG
Drag Radials
-Raven Black
-Chassis dyno & drag strip #'s to come this spring!
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 02-28-2004 10:05 AM
The way I see it, right now your cam is holding the car back from running as fast as it should. If you swap cams, then the intake becomes the bottle neck. But after saying that, I would change cams. Right now, you have enough mph to get into the 12's with some better traction.You will need better springs without a doubt, and maybe different length pushrods. Better springs alone are going to cost you over $200. More than likely you will need different retainers too. And don't forget to change distributor gears. I wouldn't be surpised if you ended up spending $600 or more on the swap, even with the "buddy" discount. 
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powrshftr
Journeyman Posts: 77
From: Sarnia,Ontario,Canada
Registered: Apr 2003
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posted 02-28-2004 09:24 PM
That 'Domino Effect' is a real bitch,huh Kid?  LOL!
Scott------------------
Turbo'd '66 Mustang coupe
-306ci Comp hyd.roller cam,Victor jr.,GT-40 hds,
BIGS 740cfm blowthru carb
-Toploader 4-speed
-3.50 Detroit Locker
-Torq-Thrust 'D''s & BFG
Drag Radials
-Raven Black
-Chassis dyno & drag strip #'s to come this spring!
IP: Logged |
goldenbob
Journeyman Posts: 86
From: medford, or., United States
Registered: Jun 2002
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posted 02-28-2004 10:21 PM
Thanks guys, seems like a "cam swap" can get pretty spendy...The heads are machined for "chebby" valves (sorry to use that word here), they have titanium retainers and good springs, but I'll have to check seat pressure and for binding. Whats the deal with the distributer gear? Won't my msd dist. be ok? What about the intake? Can I port it or will I need a good single plane like a "victor jr."?
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kid vishus
Gearhead Posts: 6098
From: middle of NC
Registered: Oct 2000
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posted 02-28-2004 10:40 PM
The retainers may be fine if they are the proper diameter for the new springs. I am almost positive your current springs aren't going to cut it. Most hydro cams are lucky if they have 110-120 lbs on the seat. Most decent rollers run at a minimum of 180 lbs, and the more radical the cam, the more seat pressure required (mine were set at 250#.'s)The distributor itself will be fine, but the gear will be a different story. Roller cams are generally made of steel, not iron. Most of them require a softer distributor gear, like bronze.
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 02-28-2004 11:25 PM
This is a pretty mild solid roller cam. It may even be cut on a cast blank like ComCam's street rollers. You'll have to check that out, it may not need a distributor gear change. The seat pressure on the valves will peobably be around 140-150 for this grind. Go for it, just get it right. And, don't worry about money! You get more every month. SteveW
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