I always work to get as close to the same length as possible. Some cars lend themselves to easily get equal length so next on list of priorities is smoothness and the smoother it can get the smaller the tubes can be for longer. At that point it is experience as to how small I think I can go.Calvin,
we have seen your thoughts on headers with few bends and therefore straighter, making them relatively short i.e. certainly not adding a bunch of bends and such to make achieve a certain length. At what point do you worry about not having enough length and the tradeoff from achieving the length.
So you get a length recommendation from burns of 28" if you need a bunch of bends 120-180* to get them from 20" to 28" (just random example) do you ever do it even though its going to hurt upstairs? i gather it depends how wide the power needs to be which comes down to the application?
or do you believe if you make it fast enough and with enough anti reversion the shorter can act close enough to a longer? i just see the F1 headers from >5 years ago and they are deliberately making them longer than what would produce the most upstairs.
Cool, easy to show pics now. Looking for opinions on these new 2" for my next 408c build. These are for cleveland A3 heads on 9.2 deck in a fox mustang. Just a street strip car.Tough to say, but I imagine 5-25+, depending on how "fairly good" they were!
We see 1-3 between a perfect set, and a more perfecter set! Lol
My not very well educated guess is no, because then you could shorten up overlap which would be a win.Can A header or Exhaust system over scavenge, and what are the results of it, if it does?
Darin said to shift it at 8600, I'm hoping to stay below 8200 but... A couple tubes turn downwards close to the port exit and the last pic with the pipe wrapping around the other concerns me a bit as far as flow goes but other than that they seem to have nice smooth bends to me, but I have no ideaBOSS, looks good to me, but what do I know? 🤷♂️ What RPM are you going to turn?
My not very well educated guess is no, because then you could shorten up overlap which would be a win.
Yeah, #4 and #5 are similar, but beggars can't be choosers, lol. Hopefully the 2" size helps with the poor turn. Seem to be clocked to me, 1-3-7-2-6-5-4-8 and a thick wall header also, 3.5" collector and close to equal lengthAs far as turning right at the port exit, yeah #5 doesn't look so great, but you either move the header out of the way of the chassis or vice versa, and moving the chassis out of the way isn't always feasible.
Hey Rick, how ya been. That's my race car, you chevy guys keep putting 350's in fords so I put my cleveland in an SS, best part is it's slow as shit and everyone thinks it's a 350, lol. No, that's my dads monte and his garage, I'm still building mine. Car is mint, he has 355 in it, ran 12.8 at 112 with slicks, he still has original 305. You get that motor of yours together?heh Blake who's monte in the shop? never pictured you a closet chevy guy lol
can you elaborate why they dont need veloicity?Now F1 is a entirely different animal. They have to give up on any velocity and do not need it. You are just looking at flow. They do play with large steps as tuned length does operate even though the tubes are really big. They are equal length and incredible pieces.