You can make runner #4 same as MAM manifold just to try to get equal length in the runners but you said don't want copy, however the rest of the runners looks almost the same as MAM, and I think most of the people want to have that design not because it was made from MAM is cause its cool and have a good flow like you said; adding to the list and most important is going to be build by you and have your name on it.
GI: Replacement exhaust manifold
- Thread starter thepope540
- Start date
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Nothing worth reading here... but I saved it preserve the integrity of the thread.
Unfortunately, extra length on #4 won't fit with the collector arrangement I've chosen. I built the collector to allow the shortest and simplest runners. Making #4 longer would require all 4 runners and the collector be reworked. Each runner would require more bends and length and as I mentioned earlier I'm working to avoid both of these. I think the short #4 is the best compromise between looks and flow - I'm happy with the current setup and think it'll work great.
Unfortunately, extra length on #4 won't fit with the collector arrangement I've chosen. I built the collector to allow the shortest and simplest runners. Making #4 longer would require all 4 runners and the collector be reworked. Each runner would require more bends and length and as I mentioned earlier I'm working to avoid both of these. I think the short #4 is the best compromise between looks and flow - I'm happy with the current setup and think it'll work great.
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thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
No worries.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
I now have two manifolds with runners 1-3 fitted and ready to go. EWG, EGR and O2 have all been sorted and I'm buying a new band saw this weekend to speed up the process of building more manifolds going forward.
Its been brought to my attention that I may have alienated some potential customers and that my tunnel vision could be hurting future sales and resulting in a substandard part. I've spent dozens of hours working on runner 4 and haven't found anything other than long and awful, or really short. I need to spend a couple days away from the project so that I can approach it with fresh and refreshed eyes. I apologize for not being able to get these done on the original timeline (I'm about 2 weeks behind right now), but I'm committed to offering the absolute best stock replacement manifold possible. I also apologize if I've rubbed anyone wrong that is never my intent - thats just not how I do things. Please bear with me as I get these sorted. Thanks Guys! Enjoy your Weekends
Its been brought to my attention that I may have alienated some potential customers and that my tunnel vision could be hurting future sales and resulting in a substandard part. I've spent dozens of hours working on runner 4 and haven't found anything other than long and awful, or really short. I need to spend a couple days away from the project so that I can approach it with fresh and refreshed eyes. I apologize for not being able to get these done on the original timeline (I'm about 2 weeks behind right now), but I'm committed to offering the absolute best stock replacement manifold possible. I also apologize if I've rubbed anyone wrong that is never my intent - thats just not how I do things. Please bear with me as I get these sorted. Thanks Guys! Enjoy your Weekends
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I now have two manifolds with runners 1-3 fitted and ready to go. EWG, EGR and O2 have all been sorted and I'm buying a new band saw this weekend to speed up the process of building more manifolds going forward.
Its been brought to my attention that I may have alienated some potential customers and that my tunnel vision could be hurting future sales and resulting in a substandard part. I've spent dozens of hours working on runner 4 and haven't found anything other long and awful, or really short. I need to spend a couple days away from the project so that I can approach it with fresh and refreshed eyes. I apologize for not being able to get these done on the original timeline (I'm about 2 weeks behind right now), but I'm committed to offering the absolute best stock replacement manifold possible. I also apologize if I've rubbed anyone wrong that is never my intent - thats just not how I do things. Please bear with me as I get these sorted. Thanks Guys! Enjoy your Weekends
Tom. Don't worry about it. You're the only guy doing this so you've pretty much got a monopoly as far as anyone is concerned.
If I had the cash id get one but I fear I will have to pony up for the dyno to get my standalone tuned.
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- 03.5 YLW MSP
+1, plus Tom you have off as very informative as well or at least you did to me.
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- 2003 mazdaspeed protege
I just glad you are taking this as serious as you are. It shows what kind of commitment and character you possess.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Well apparently I didn't need a couple days, just a few hours. I found a very MAM-like routing, but it isn't equal length. If anything it is worse than the short runner from that standpoint. It cannot be done in roughly 8 inches, but this looks great. You guys decide, should it be this or the short runner? Short is about 4 inches, this is closer to 15. (I've taken all measurements using the outside of the bends.)
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
P.S. Im considering using electrical tape to build the manifolds. Its so much faster than welding, and I can do it in the livingroom floor its great
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- 2003 mazdaspeed protege
Visually the 3rd rendition of the manifold prototypes looks the best but I think I would rather have the first prototype simply because it looks like a easier install for me ( I have bolts not studs in my current head. )
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
Its easy to just put in one or two studs. I'm happy to build whatever the market demands.
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I don't know if I'll ever need to buy one, so I don't want to weigh in too heavily. But the less turns the better. The equal length is a nice to have, but I doubt it will have much impact compared to the energy lost by turning nearly 360 degrees. Again I stress that durability should be paramount above all other parameters.
thepope540
Member
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- 2003.5 Yellow Speed - Sold, Spicy - Sold, #639 Black Mica
When I build one for myself, it will get a short #4. I want as few bends as possible to keep all the energy in the manifold and going into the turbo. Plus I want mine to be as light as possible and as strong as possible. But for the general market I'm going with what buyers want. So what shall it be?
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- 03.5 YLW MSP
After reading what you posted about all the dynamics of how the runners are placed with how that affects the manifold. Put me down for a short #4 runner as well.
Edit: not to mention it looks a little easier to make and less materials for you. which also should yeild a faster turn around.
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- 2003 mazdaspeed protege
I agree with the 3 of you.
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- 1989 RX-7 GXL Blaze Red
I'm in for the short. Original designs ftw.
