Refresh 1982 crossfire vette

I called a few camshaft manufacturers ant this is what I got.
LUNATI p/n 20120642lk
COMP CAM p/n xm276hr
and from there site 12-422-8 or 12-466-8
how do these look. thanks Jac1892
 
what is it your trying to accomplish ,improve upon, or change or avoid with or by ,selecting a different roller cam than the
crane119671.png



yes something like this cam linked below matched to 1.6:1 ratio rockers
12-466-8.png

with its higher valve lift ,could provide you with a bit more potential power,
but it also has much higher ramp acceleration rates,
and thus puts significantly more valve train stress on the engine,
everythings a compromise at some point

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=175&sb=2

ID also point out all these cams would benefit significantly from use of a 2800 rpm stall converter, and will REQUIRE larger than stock injectors too reach their full potential power,as the increased air flow and higher operational rpm range will require you match that with a comparable increase in fuel delivery rates
 
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Here is the Lunati cam information.

Retro-Fit Hydraulic Roller Cam. For daily performance use and efficiency. Improved
low end response and mid range torque and HP over OEM cam. Good idle.

  • Advertised Duration (Int/Exh): 270/279
  • Duration @ .050 (Int/Exh): 209/213
  • Gross Valve Lift (Int/Exh): .416/.447
  • LSA/ICL: 112/108
  • Valve Lash (Int/Exh): Hyd/Hyd
  • RPM Range: 1500-5200
Lunati_HR_50142_416_447.JPG
 
What I'm trying to accomplish is trying to get a hydro roller cam like the Crane 119671 , but at a lesser cost with about the same specs, so I can work in price of a 2 piece front cover to be able to get the cam button right.
 
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What I'm trying to accomplish is trying to get a hydro roller cam like the Crane 119671 , but at a lesser cost with about the same specs, so I can work in price of a 2 piece front cover to be able to get the cam button right.

A 2 piece cover is not mandatory for getting the cam button clearance right. Plus, they leak.
All you need to do is not install the rear cam plug and measure the clearance there. Once you have it where you want it, then install the plug.
 
I'm doing this refresh in the car, so I have to do the cam button from the front. The engine is have way down, working on getting the heads off, and the old cam out that's why I'm looking at a two piece front cover. Is getting a new balancer worth it,since it soon will all be apart?
 
Is getting a new balancer worth it,since it soon will all be apart?

Yes, it can keep you from damaging the crank from too much twist causing a failure. Beside it
can actually add a few HP. Yours is probably several years old and the outer ring could have
rotated, causing you to set the ignition timing wrong.

Be sure to check TDC, they make adjustable pointers so that you can align it exactly with zero
on the balancer.

http://garage.grumpysperformance.com/index.php?threads/harmonic-balancer.3554/

Here is a very good article.
http://www.dieselarmy.com/engine-tech/engine/how-it-works-viscous-dampers-a-k-a-harmonic-balancers/

TorsionalVibration05.jpg

CrankTorsionalTwist.gif

.
 
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Hi, again, is there any advantage to using a double roller timing chain set, and do I need a special cover? thanks
 
But you might have to grind the center oil galley in the timing cover area for chain clearance.
I'm sure Grumpy will add the picture.
 
Guys, getting ready to put new aluminum heads on, the block has been in the car , and i need to get the deck real clean, any ideas what works better, and I bought copper paint to put on the head gaskets does this make sense? thanks
 
thanks,I really meant, copper spray a gasket...but i'm having trouble cleaning the deck of the block,the old head gasket has been on for 35 years and the deck has the outline of the gasket on it and wont come off. Any ideas how to get that off, or will the gasket with copper gasket spray seal it up? thanks..
 
Another question, my first time with aluminum heads, what about header gaskets, just a standard gasket or a pressure gasket, and what works best for bolting them to the heads, Stage 8 bolts ? thanks
 
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