Starting my 461 build any tips.
My goal is a very street able motor with little or no track time
I'll make a few comments, because that's what we do on forums. :smile3:93 octane,
Here's what I got
6x4 iron heads/ ported.(97 cc)
1974 400 cid
Eagle 461 stroker kit with cast crank
Performer intake manifold
650 Holley ( prob too small)
And yes I am realistic about my expectations
Ok then, that helps. My car makes about 12" of vacuum at idle, which in my opinion (YMMV) would be marginal for power brakes. That's why I chose to convert to hydroboost during the build. You're going to want to pay very close attention to the overlap spec on the cam because that is what affects idle quality and idle vacuum the most. Overlap (you probably already know) comes from the combination of how aggressive the opening/closing ramps are, the lift duration, and the lobe separation angle (LSA) of the cam. If you decide to go with a flat tappet valve train (they definitely are less expensive) then you won't be able to run as much duration as you would be able to with a roller because the ramps can't be as steep as they can be with a roller. The 041 profile oldskool mentioned might be pretty good for you, combined with a set of controlled leakdown lifters (such as the Rhoads). That cam is pretty nasty in a 400, but in a 461 it would be a lot tamer - and the lifters help with that even more. Like everything else that involves these cars, you'll find opinions all over the map with regard to that type of lifter. Some love them, some hate them. I've never run them myself so I can't offer any first-hand knowledge. I "hear" they can be noisy, which by itself wouldn't bother me personally in the least, but I might be concerned about the effects of the 'hammering' that causes that noise in a system that wasn't designed for it (i.e. valves shutting harder than usual due to them closing while the lifter is still on the steep part of the cam, because of the leakdown effect at low rpm) --- but that's just Bear thinking out loud - I really have no direct experience. You can also tame overlap some by going with a wider LSA cam, and at 9.3:1 compression you should be pretty safe doing that. (Wider LSA's tend to build more cylinder pressure which can in some cases get into trouble with detonation).yes power brakes , a/c car.
my budget is not unlimited, I would like to save money where I can and spend it where I need it. this motor will not need to be beat on very often. I assume its going to be alot more fun than the small valve 350 i have in there now.