log manifold vs short length tubular
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- Driving Mom's Station Wagon
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log manifold vs short length tubular
I've decided to go with a hx35 so in turn I've decided to build a manifold for it instead of modifying one. And since this is my first manifold I want to keep it simple and keep the cost down. My question is, would it be worth the extra time and a little extra money in materials to build a short lenght tubular like this; viewtopic.php?t=44615. Or should I just stick with a basic log mani. It looks more effecient than a log mani, but is it really?
Look at my thread. I am using a cast top mount with hx35. Fitment is good.
12.96 @ 116.36 - 2.1 60ft - 11/2011
13.1 @ 114 - 2.3 60ft - 8/2012
KA24DE-T
Build thread/Blog
YouTube Channel
13.1 @ 114 - 2.3 60ft - 8/2012
KA24DE-T
Build thread/Blog
YouTube Channel
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- Driving Mom's Station Wagon
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I did see what you were using, but I was thinking if I can make something that is more efficient for about the same cost as buying one that is less efficient it would be worth it. I guess looking at the log manifold makes my ODC kick in. I know theres a way to have a simple design that is way more efficient than a log.
To me it seems like the short length tubular would have better flow which would help the turbo spool faster while giving a little more top end than the log at the same time. And it would be almost as strong.
To me it seems like the short length tubular would have better flow which would help the turbo spool faster while giving a little more top end than the log at the same time. And it would be almost as strong.
- Kamilitaryman
- Encyclopedia-Nissan
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From my understanding, there is a limit for a log-style manifold and how far you can push it. Some companies claim that they're good for 400-500hp. They also spool a turbo faster. Even though, 400 is MY power goal, I decided to go with a ram-horn design because they've been proven to make numbers past that. Thus giving myself room for upgrades later. Since you are going to fab up your own, get 2 flanges and make both, this way you can decide which will suit your needs better.
PM me if you're interested in getting something powder coated!
- nissanfanatic
- SuperMod
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- Driving Mom's Station Wagon
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Although I dont plan on breaking 500hp, the power limit with a log manifold was another reason I was looking for a more efficient design.A side by side test would be interesting and a possibility in the future but it'll be awhile until Im making the power to really warrant that. Id rather use the $100 for one of those manifolds towards something else right now.
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- NooB
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If you're not in a rush and like doing things to learn making a log manifold is the best place to start. Just make sure you have something more powerful than the cheap China 90 amp welders.
My second manifold came out 3x better than my first log but that only because the log manifold taught me a bit about fabbing exhaust manifolds.
My second manifold came out 3x better than my first log but that only because the log manifold taught me a bit about fabbing exhaust manifolds.
Current Experiment: Project Twin-Charge 2022
- beercandrifter
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power/ceramic/swain coating ftw.nismo silvia wrote:It would build my own I dislike the rusty ass look mild steel gives
91 240sx Hatch: HomeBrwd
25psi hx35/8.8:1/264^2 cams/95lb injectors/Megasquirt 2/ka24de build **RIP**
T56/4.8 LSx/LS9 Cam/60lb injectors/comp 918 springs/Megasquirt 3/all custom wiring
25psi hx35/8.8:1/264^2 cams/95lb injectors/Megasquirt 2/ka24de build **RIP**
T56/4.8 LSx/LS9 Cam/60lb injectors/comp 918 springs/Megasquirt 3/all custom wiring
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- Driving Mom's Station Wagon
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Most of it is about just making my own manifold and the rest is about saving money. I do have access to a mug welder that is plenty big enough, but I have been thinking about investing in a tig. After I get everything put together I will build the opposite style just for a dino comparison
Kfred: will that manifold have clearance with a holset?
Kfred: will that manifold have clearance with a holset?
- mattheripper
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- Driving Mom's Station Wagon
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3/8 is fairly common, if I'm not mistaken. Go here:
http://sdsefi.com/techheader.htm
This is a more or less step-by-step of how to fab a turbo manifold, and what to make it out of.
There's a number of other fab/DIY articles and tuning info on that site. Go to http://sdsefi.com/tech.html to see them all. The article on making an intake manifold is an interesting read as well.
http://sdsefi.com/techheader.htm
This is a more or less step-by-step of how to fab a turbo manifold, and what to make it out of.
There's a number of other fab/DIY articles and tuning info on that site. Go to http://sdsefi.com/tech.html to see them all. The article on making an intake manifold is an interesting read as well.
- beercandrifter
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for your turbo a log manifold will exceed the boost on this turbo you are going to put out. believe me.
im at 20psi on my log manifold i put together and hx35.
that kind of pressure level you start to break things
im at 20psi on my log manifold i put together and hx35.
that kind of pressure level you start to break things
91 240sx Hatch: HomeBrwd
25psi hx35/8.8:1/264^2 cams/95lb injectors/Megasquirt 2/ka24de build **RIP**
T56/4.8 LSx/LS9 Cam/60lb injectors/comp 918 springs/Megasquirt 3/all custom wiring
25psi hx35/8.8:1/264^2 cams/95lb injectors/Megasquirt 2/ka24de build **RIP**
T56/4.8 LSx/LS9 Cam/60lb injectors/comp 918 springs/Megasquirt 3/all custom wiring