Dual conical valve springs

Finished up the dyno testing with the dual conical valve springs and got the article submitted to Hot Rod. The springs worked just fine even with a super aggressive QRI lobe on the cam. The intake lobe was .780 lift with the 1.65 rocker arms and the engine pulled nice and smooth up past 7000 rpm. I don't think I'd recommend that lobe for a bracket racer but it was interesting to run it as a test.

Here is the article: http://www.hotrod.com/articles/dyno-tested-dual-conical-valve-springs/

thanks Andy

Good to see the valve spring tech moving along. That website is nearly unviewable, even with adblock and ghostery it's so loaded with garbage ads and auto play vids I just clicked out. I just picked up one of the last hex-a-just timing chains for a BBM, next up is the ARE timing cover. Working my way up to a roller cam.

Great article, thanks for sharing...

What is the part number on the lifters?

Are these in non-bushed lifter bores?

Lifters are the AMC solid rollers from Comp Cams. Non-bushed lifter bores.

950 Carb.............what happened to the EFI.........

This engine uses a 950 Dominator that Mark W. reworked. He did a nice job, changed the boosters and redid the calibration. It works pretty well but I'll most likely convert the engine to EFI at some point. EFI works better for the stuff I do.

Cool, just figured you had gone EFI on pretty much everything........