Thread: Who would be interested in a 4-1 header?

he said the same about the AEBS, but I believe he know what's he's doing

lets take a look inside his turbo manifold.







No cheater cuts here!

Damian, if you don't want me to post these LMK, I'll take it down.

actually no, that pic was when i first did it. and i was pretty new to the whole 4-1 design and theory. i revised that header and made another 8whp, for a total of 10whp over the ssac.





yes sir, this man is correct. that was like i said when before i had done any r&d for myself on this sort of thing, i actually have made a new colletor that is A LOT smoother and i have cut the header down another 5in, now its to a total of about 25-26in with the 2.25 collector and stepped primaries. its an awesome design for top end, drag car. its makes really good power from 6.5-9k but knowing what i now konw i would have done things a little diff.




lol thanx bro

Well, that's good to hear. As long as you always strive to improve, then it's all good. I wasn't trying to nitpick the header, but the collector design on it caught my eye hard.

Cuts not made tangent to the radius have high flow penalties, and the angled cuts going into the collector just have tremendous velocity and turbulent losses associated with it.

I can see the attempt to incorporate strong elements into the header, it just appeared to be something that someone new to the header game made. Everyone has to start sometime though, no doubt, so no disrespect there. 4 beehive springs for one slip fit...a bit much....haha.


I got Keo up here doin P.I. work on my stuff...lol. Schedule pipe is alot harder to work with than 16g., no doubt about it. I'm starting an H22A Honda header shortly that'll be full equal length...I'll post some pics when that's underway.

yup, next step is a visit to your place!! lol

would you mind me asking if you are close at all to the reading or philly areas? i used to live in pottstown PA.

he lives the other way,

I got camera's looking all over my property....I'll shoot yo' ass!!!

so what kind of specs are going to with on this? also are you going to have an optional ve flange.

I'm not really gonna divulge any specs at this point. I have some initial numbers, but I'm gonna run some simulations and do most of the design in software. Right now I'm just focused on getting the core jig built and getting materials for the prototype.

Sounds like there is some decent interest for these Damian, thats great!