Hello, this is the scenario:

The engine is on the final stages of being done (with a cam) and the heads are already assembled with the 26915 springs. I bought the 26918 springs a few days ago, before I knew the heads were done. So should I get the 918 springs installed even though I'll get charged for it, or should I send the 918 springs back and exchange them (plus cash) for pro mag 1.6rr?

 

what are your cam specs?

 

212/218duration & 488/495 lift with stock 1.5 rockers. It's a small cam for dd and I never had a cam, but perfect time to put it in, during a rebuild.

 

I run the 918 springs on a 231/232 598 lift cam. You should be fine with the 915's. As for the RR's I would call Comps tech line and ask them if the 915's will work.

 

the 1.6's will change your lift.lift is proportional to the lever arm (rr) pushing down on it.(.495/1.5)*1.6= .528 lift. with 1.6RR this will be your accelerated lift.

the 915s will handle that just fine.

I have to ask though, why such a small cam. ur right around the stock cam's lift

 

I got that cam because the car is a dd, and wanted the slightest lope if any. I wish I could go bigger and get that lopey sound but, I don't want to be hassled by cops. I now know there's other cams but I was short on time and searched too late for them.