New 408 stroker runs rough at idle

Moparmadness408 said

Yeah, if you can give me everything you ran on the dyno with it, that would be great. But first, I want to see if I can make my edelbrock one work. Is there anyone you know that I could talk to that has experience with edelbrock carburetors that works at blue print engines?

Click to expand...

I had an Edelbrock initially on my blueprint 408. The rods bounced and the carb sucked as a result. Lighter springs helped, but then it had issues transitioning to cruise or going WOT.

In order to get proper idle I had to also drill the butterflies some to add air at idle, otherwise the transfer slot was too exposed. Do some searches on the transfer slot and you'll see its a big deal.

Even once I got my edelbog as tuned as I could, the bowls would evaporate dry as soon as I shut it down. Then I'd have to crank forever to get enough fuel back to fire it up. Finally gave up on that carb.. (I went efi, but none of my holley friends need to crank for 5-10 seconds either..).

I was running an airgap with a thick spacer too.. Didn't make any difference.