General Category > Quadrajet Carb Talk and Tips

512 cad 230/236/110LSA

<< < (2/3) > >>

512 cad:
Just a little more info:
Advertised duration is 273 int./290 exh.
What's "a lot"?  I have 13 degrees overlap(I think...does that sound right?).
I was expecting a 2100-5200 powerband(motor should hang together pretty well to 5800-6000).
I might be missing out with only 1.6:1 ratio rockers, but I squueeeezzed them under stock valve covers.

73ss:
Is this the X-Treme energy for the caddy's? I've noticed most of the 114 lsa are advertised as "Maximize nitrous, power adder, etc". I'm deciding on a 114 grind for my 454. No power adder.

512 cad:
I don't know anything about the exteme energy series cams, but I do know mine is a custom grind that MTS has done for them.  It was manufactured by Comp Cams.  I don't have a clue why the 110 LSA was specified.  I'm sure they know more about it than me.  It beats the stock smog cam!   

Cliff Ruggles:
How many Caddy engines do you suppose Comp Cams built and dyno tested with 110, 112, and 114 LSA camshafts.

My bet is not a single one.

Same deal with Pontiac 455 engines, their XE cams are "turds" in those engines.  Not enough seat to seat timing, not enough overlap, and LSA too tight.  

We've done WAY better using long duration (seat to seat) cams on wider LSA's in those engines.

Engines are just round pistons moving up and down in round holes.  Any big cid relatively "long" stroke engines are going to share similiar results.

Keep in mind here, I'm discussing street and street/strip engines that require good idle, good vacuum at idle, and strong low end power.  This means we're looking at smaller cams for them.

With high rpm race engines, we typically have to pull the LSA down some to get good results.  Almost the exact opposite with pump gas street engines.  We do NOT want to narrow up the power curve, and make a lot of cylinder pressure in the mid-range (detonation) using pump gas.  Much better to spread the power (torque) out as much as possible/practical...IMHO....Cliff

512 cad:
Carbs and cams are the two parts of a car that I have not endeavered to understand until this winter...but I'm learning from you.  Thanks!

I understand what you are saying.  I don't doubt it.  I'm not saying this is the best cam choice. 

What I was trying to say is that I don't think Comp Cams came up with the specs.  They said it was a custom grind.  I don't think they sell it retail.

I think Maximum Torque Specialties came up with the specs.  I ordered it from them, they shipped it.  They do restore, race, pull, tow, cruise and dyno cadillac engines.  Only.  For sixteen years. 

I haven't asked them why they thought this was the best cam for my land yacht.  Mabey they shipped the wrong one by mistake?  I doubt it.
512 cad     

Navigation

[0] Message Index

[#] Next page

[*] Previous page