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New manifold build, comments?
hello
i am making a new manifold and below are some pictures of the fabrication. i am open for suggestions and comments what do you all think of this. http://img257.imageshack.us/img257/7...0115wq2.th.jpg http://img257.imageshack.us/img257/1...0117qr3.th.jpg http://img257.imageshack.us/img257/5...0119vd8.th.jpg http://img257.imageshack.us/img257/9572/img00116yv6.jpg By musanovic, shot with BlackBerry 8100 Series at 2008-02-24 by the way it is not done yet. sent it to the shop to get tig welded before putting on the collector for External wastegate. |
The main suggestion was going to be get it tig welded, good that you're getting that done. You also have a pretty large gap between runner 4 and the flange outside of that it should flow pretty well. What about turbo placement, are you going to cut the collector so that it angles the turbo or do you plan to make it a vertical top mount?
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turbo is going to be top mounted and is going to be angled towards the engine. the collector is going to take car of the angling part. i want to put the wastegate on the collector so it will vent all the gases from all 4 runners. the gap on runner 4 is going to be fixed during welding. it's not easy to make everything fit as it seams. glad you like it.
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the collector looks pretty fugly.....but it also looks like 2-3x better than either of your over the counter options. Should do really well.
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Originally Posted by neogenesis2004
(Post 219004)
the collector looks pretty fugly.....but it also looks like 2-3x better than either of your over the counter options. Should do really well.
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I always wanted to know: All people that makes their own manifold, do they bend the beginning of the tubes that are welded to the flange so it makes an oval hole like the flange or do they just weld the tubes round as they are? And what is the dia and sch of the tubes?
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I like. Where in NC are you?
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Originally Posted by IcantDo55
(Post 219020)
I like. Where in NC are you?
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Originally Posted by Dark Wanderer
(Post 219017)
I always wanted to know: All people that makes their own manifold, do they bend the beginning of the tubes that are welded to the flange so it makes an oval hole like the flange or do they just weld the tubes round as they are? And what is the dia and sch of the tubes?
Thanks |
Nice work man. Where did you get the flange, or did you make your own?
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Originally Posted by patsmx5
(Post 219036)
Nice work man. Where did you get the flange, or did you make your own?
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Originally Posted by cjernigan
(Post 219040)
Why does it have the 2 large extra holes?
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That's what I was assuming, though it would be better to do that across the entire manifold and two or three cuts between the runners with the band saw would accomplish that as good or better than the holes.
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don't forget the external wastegate port - now's the time :bigtu:
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It seems like 2 and 3 is longer than 1 and 4, you might want to consider making them equal lenght, seems pretty easy.
Have you done any pulse calculations or is it placement and space that mandates its size? |
its ver difficult to make a top mount equal length while retainging AC and PS, there is not much room there to do as you please
so IOW space is the mandate then, yeah... this looks very much like what i have in mind, just upside down... the external wastegate port will be on the actuall collector that will get welded on after the pipes have all been welded together he did tell me that once its all TIGd he wants to trim down the ends of runners 1&4 to make it more level and then the collector comes on overall i think its a very good design and it should work very well, great turbo and WG placement (and good room for DP routing-quoting musanovic here) great work |
Originally Posted by cjernigan
(Post 219040)
I was going to ask that as well. Why does it have the 2 large extra holes?
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Originally Posted by Sentic
(Post 219079)
It seems like 2 and 3 is longer than 1 and 4, you might want to consider making them equal lenght, seems pretty easy.
Have you done any pulse calculations or is it placement and space that mandates its size? |
Looks great. Horray for DIY. good job. I wouldn't worry about equal length, not worth the grief. Pulse calculations? hmmmmmmmmmmm
Originally Posted by Dark Wanderer
(Post 219017)
I always wanted to know: All people that makes their own manifold, do they bend the beginning of the tubes that are welded to the flange so it makes an oval hole like the flange or do they just weld the tubes round as they are? And what is the dia and sch of the tubes?
Thanks |
i was able to make the pipes fit together a little better when i made them oval. airflow seams really good at the flange when pipes are oval compared to round. if you can do it why not. right?
ps. what are pulse calculations? i have no ideal how to do them if they exist. |
^^ when the exhaust pulse from the cylinder hits the collector, a negative wave will be transmitted back and help with extraction (on a n/a car, this will make great difference) on a turbo car, it will merely help a little with spool, so it is not very important, the shaping of the collector does matter a lot more. As soon as you start to build boost (and backpressure) the negative wave becomes irrelevant. Anyway, the trick is to get the wave to hit the exhaust valve at the right moment, just before closing. I was just wondering really, being interrested in this shit :)
oh yeah, equal lenght is about the same, matters when there is a lot of pulsing (before spool), matters a lot less when backpressure hits. |
How did you measure to try and get an equal length? Can't wait for the updates.
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Originally Posted by candela
(Post 219428)
How did you measure to try and get an equal length? Can't wait for the updates.
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horray for vids!!!
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Originally Posted by musanovic
(Post 219485)
actually it will not be a equal length manifold it is hopefully just going to be a better flowing one. that is my main desired outcome.
looks like you succeeded there. |
Originally Posted by Braineack
(Post 219701)
looks like you succeeded there.
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fo sho, the thing looks awesome too man, i can wait to see the ceramic coat on it, i think i'll want to hump it
fuck, i know i'll want to hump it, hell i want to hump you right now i think ill have a little bit of free time this weekend, i may pop my header off and take some measures to get an idea for my build...im sure you'll be there |
Originally Posted by whaaamx5
(Post 219709)
fo sho, the thing looks awesome too man, i can wait to see the ceramic coat on it, i think i'll want to hump it
fuck, i know i'll want to hump it, hell i want to hump you right now i think ill have a little bit of free time this weekend, i may pop my header off and take some measures to get an idea for my build...im sure you'll be there |
cant wait to see completed pics!
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you should have it by today, i want to see the damn welds...hurry punk
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this is how far I got till now it is starting to look like a real manifold now. i'll keep updating as i go. hopefully it is looking good. still got to finish up the welding on the collector but it will sit in this position.
P.S and yes the turbo is going to be clocked down. hood won't close if i leave it. http://img246.imageshack.us/img246/4...0151nf2.th.jpg http://img246.imageshack.us/img246/5...0149gu4.th.jpg http://img246.imageshack.us/img246/9...0148hy8.th.jpg http://img246.imageshack.us/img246/8...0147fr8.th.jpg http://img246.imageshack.us/img246/7...0145up7.th.jpg http://img246.imageshack.us/img246/5...0141zb8.th.jpg http://img246.imageshack.us/img246/9...0128un2.th.jpg enjoy |
collector looks like a HUGE turd
/thread |
For best flow you would need to rework that collector, you flow well through the runners, just to.... hit the wall. You will get a lot of turbulence. Hard to say if it will be an improvement over the log type. Only way to know is to test :)
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the welds look real good, i like
overall good work now cut some relieves in that flange and have it trued, ceramic coat it, and boost away i think you'll be able to fit the WG right at the collector and have room for the dump tube...that should be good |
post pics of finished mani...its looking good
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Great work!
Hmmm, looks like the turbo is sitting kinda high. Is that the final position? If so, will you be able to close the hood without modification? |
Originally Posted by FHS
(Post 228529)
Great work!
Hmmm, looks like the turbo is sitting kinda high. Is that the final position? If so, will you be able to close the hood without modification? WOW. what a difference between the log style and this thing. i mean the response is stupid good. i will post some pictures tomorrow but man it was worth the time. no more boost issues i set it at 11 and it stays at 11. i believe the collector helps a lot. i could not get out of the damn car drove around for 3 hrs but gas prices are pretty high so i had to cool off a bit. :jerkit::jerkit: if you know what i mean. pics are on the way. :) |
you need a better camera friend, these pictures do not do the mani justice, im telling you, it looked way better in person...
were you able to modify the oil drain like you wanted? good job on the DP, did you weld the bracket on or no room? awesome DIY job all the way man, congrats |
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