92turboLE Posted September 8, 2003 Report Share Posted September 8, 2003 SO... this may sound stupid, but when i get my new engine put back together, i am thinking about doing some custom exhaust manifolds. The way i see it, i dont know too much about flow dynamics when it comes to exhaust, but anything can be better then the headers on there right now... they just look pretty cheese-dick to me. so i may pick up another set at a j/y and cut off the flange and go to town with some piping and a welder and see what i can come up with. Any suggestions??? Anyone know anything about making headers or anything that i should know about how they are supposed to flow??? any tips, techniques, anything is welcome. thanks - Justin Quote Link to comment Share on other sites More sharing options...
92turboLE Posted September 9, 2003 Author Report Share Posted September 9, 2003 hmmm, no replies... maybe it is a dumb idea :? - Justin Quote Link to comment Share on other sites More sharing options...
GPRACER Posted September 9, 2003 Report Share Posted September 9, 2003 Not dumb at all, just difficult, I'm sure we would all like a set. I've contemplated making my own set a few times. We have a mig welder and a pipe bender at work, I've thought about trying something when and if I ever get the engine I'm building ready. Quote Link to comment Share on other sites More sharing options...
slick Posted September 9, 2003 Report Share Posted September 9, 2003 I know this isn't gonna help a ton, but this is some info that I have gathered. All the pipes have to be the same length when they are collected in the collector. Shorty headers may actually hurt performance, but I know this applies to v8's, not sure on 6's. Don't get a short collector, the longer, the better. If you think about it, it makes sense. If the tubing is too big, it will hurt performance, same applies if its too small. I'll see what I can come up with in the size of the tubing area, just give me some numbers: 1: Which engine, 2: How much estimated power? Quote Link to comment Share on other sites More sharing options...
GPRACER Posted September 9, 2003 Report Share Posted September 9, 2003 I was thinking about 1 1/4 inch pipe into 3 1/2 inch collectors, you can tune for correct back pressure by using a back pressure gauge inserted into an oxygen sensor fitting. 3400, SFI not sure of which cam yet, but already have the block punched 40 over and higher compression pistons installed. It's going to be trial and error for sure. Quote Link to comment Share on other sites More sharing options...
topless94style Posted September 9, 2003 Report Share Posted September 9, 2003 Yea go long on the tubes and make sure they are all the right size. I read on article i dont remember where ill try and find it on creating your own headers. there was a kit you could order that came with a bunch of plumping you could use and wire i believe to route them. I remember reading the guy took wire and used that as the center of the pipe and then moved the pieces of each wire into different areas to route the tubes so they would be equal length. Its hard to explain ill try and get the link. Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted September 9, 2003 Report Share Posted September 9, 2003 I think I have a 60* book somewhere here that lists ideal sizes for headers for our engines..I'll see if I can dig that book out of my storage shed while I'm hoarding away some more parts in there tomorrow Quote Link to comment Share on other sites More sharing options...
Jon89le Posted September 9, 2003 Report Share Posted September 9, 2003 Aside from the specs from that book (post right above me), talk to Ben (Vegeta). He from what i knew, was the one with the info for the headers. Over on the 60V6 board he was trying to get a company to do them for us. So try and get a hold of him, if you can,lol. Quote Link to comment Share on other sites More sharing options...
Jon89le Posted September 9, 2003 Report Share Posted September 9, 2003 BTW, If you get these headers done bro, ill be the first person to test them out for ya Quote Link to comment Share on other sites More sharing options...
92turboLE Posted September 9, 2003 Author Report Share Posted September 9, 2003 ok, well if i get the headers done and they are success ful - depending on how many of you want them, if i get a considerable intrest and can get a group buy thing going on, i will make them, otherise, i will post all plans, sketches, designes, materials, ect. If i can get say 10 or 15 ppl for sure, then i would be happy to make them for as inexpensive as i possibly can justify. lemme know intrest. - Justin Quote Link to comment Share on other sites More sharing options...
Jon89le Posted September 11, 2003 Report Share Posted September 11, 2003 Did you ever find that book? Im looking for the specs now because i may have access to the machine shop here at school. Ill let you figure out my intentions also, Quote Link to comment Share on other sites More sharing options...
92turboLE Posted September 11, 2003 Author Report Share Posted September 11, 2003 I think I have a 60* book somewhere here that lists ideal sizes for headers for our engines..I'll see if I can dig that book out of my storage shed while I'm hoarding away some more parts in there tomorrow yeah, you should really find that book for me - Justin Quote Link to comment Share on other sites More sharing options...
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