cam choice for Buick 430

[Marx3]

Hi guys. I thought I would put up the question up in here, since it seems that people in here are not so hung up on the usual "choppy idle is all that matters" junk.

I need advise regarding cam choice for a Buick 430. It is 10.25 cr, and it gets stiffer valvesprings and dualplane edelbrock aluminum intake ( for some reason, car is not mine )

The engine sits in a 1967 2-door wildcat and everything stays stock.

I want to put in a cam that takes advantage of the high cr, but does not have miserable idle.
Owner of the car suggests these two lunati cams.

Advertised Duration (Int/Exh): 262/268
Duration @ .050 (Int/Exh): 219/227
Gross Valve Lift (Int/Exh): .484/.505
LSA/ICL: 112/108
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 1300-5500

or

 Advertised Duration (Int/Exh): 268/276
Duration @ .050 (Int/Exh): 227/233
Gross Valve Lift (Int/Exh): .505/.521
LSA/ICL: 110/106

I am worried about idlem with the LSA on the latter... But I guess the high compression will compensate somewhat for this?

Feel free to suggest other cams.

[carmantx]

The last several Buicks we have built, we have had the cam custom ground to meet our needs/desires for the particular build.  Cost only slightly more than an off the shelf cam, but has been well worth it for us.  You might give that a consideration.

[hunter55]

I have a lunati cam in a pontiac 455 with 220  - 230 @.050 110 LCA   106 ICL and it idles very well with
About13 in vac.  I've been very pleased with how this cam runs.with about 9.5 CR.

[Cliff Ruggles]

http://www.taperformance.com/products.asp?cat=160

I'd get a came from these folks, designed specifically for the Buick engines.  They have longer off seat timing and plenty of choices with wide LSA, which is what I would use for what you are doing....Cliff

[Marx3]

Great, thanks guys.
I am looking into one of those cams with a good high LSA.

[Marx3]

I am thinking the 212 then... but I feel I can go bigger...
I am worried about the 110 LSA on the 284. It just seems low. My buddy's Buick 455 idles like crap with 110 LSA and 9:1 cr

I fall in love with the sleeper 288-94... Could I pull this off? converter stays stock mind you...

[Cliff Ruggles]

I'd avoid the 110 LSA as well.  We have had much better luck with 112-114LSA, better idle, broader power curve, and less sensitive to octane, etc.....Cliff

[Marx3]

114 LSA regardless of the sligthly high duration #'s ?

I am trying to understand how LSA and duration relate to each other when it comes to idle quality.
Is it correct that off-seat time does not effect idle quality?

[Marx3]

well, owner of the car chose and bought the TA 112 cam before I could have anything to say. I have a strong feeling the TA 212 would have been more fun without less idlequality.
Thanks for your advise anyways !