Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Is it worth replacing valve springs @ adding roller rockers?
From the looks of your combo , I dont see a lot of compression for a drag motor, so if you use a larger cam, I think you will see some compression loss due to greater amount of over lap. Thats what I see when running Pat's DCR program as well as some paper dyno runs. I would still lean to the smaller cams , 268 is good but if you have some options to go larger rocker arm ratios to increase lift,, try that. .550 lift should be plenty . I am basing this on the combo you listed . Need to make sure you have good valve springs also to keep this motor spinning . I have seen small motors buzz well with small cams and heads and heard what PDQ has run with simple stuff and it works so I think you can do the same but you need to keep all compression you can . Think you said you were running 9.1? Would also help if you went to solids.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.