Thinking about logs

So I'm contemplating building my own log setup. I know I could buy a kit from trick or KB or from one of the members on here, and I still may but I just want to consider the options. This is going to be a budget build since I am in college still. I finally decided to pull the trigger after that hot rod article. I have a nice miller mig and shop at my disposal and I know the basics on fabrication I would say. So say I want to build a log, what material woul I use and where can I get it from? Where is a cheap yet reputable place to buy flanges from? And what kind of cost am I looking at? I don't want to do to stainless bc of the price and idk how I would weld it. I'm pretty confident I can copy the pictures of manifolds that I have seen here but is there any helpful tips that I can use? As for the crossover I plan to just buy pre-bent pipes but idk where to find the flex fitting at. Also my roommate thinks it would be better to not build a log setup but rather mount the turbo in front of the engine with the manifolds just swapped around? Any benefit to that design over a log design? I know it's a lot of questions but I'm just wanting to maybe do this myself to save money and bc it will be fun. Any help is appreciated.

Would it be easier to turn my factory manifolds around and run a crossover from the driver side to the passenger side in front of the engine and mount the turbo in the same location as the trick and kb kits put them? Just basically running two pipes from the manifolds and merge them together and weld a T4 flange onto it from there? Sounds like it should work. Any reason why I shouldn't go that route?

We use both manifolds on some setups and they work great.
I can tell u if u build a turbo with two manifolds or two logs that merge into one at the turbo, it will flow more and make more hp on the topend. I've done it and compared them.
Also, keep in mind how far u wanna push this.
If u just want a good driver, good power and a reasonably easy kit ur gonna build on your own, the single log with the crossover feeding into the rear of it will be more than enough, but more attractive to u, it's easy, cheap and works great.

If u want budget build check out siliconintakes.com and sister site frozenboost.com

Columbia mandrel bends has decent pricing on material, but not the cheapest but I say from using many suppliers out there, they have quality steel. And there is a difference in cheap and good metal.

Those three sites will be enough to get it done!

Good luck

Thanks Allen, you're always ready to help a brother out. I'm going to be doing some research and do a build thread then make the trip out there to get a good live tune

Nick - get off the computer, go to work, and make some money so we can get this ball rollin.

Haha glad you finally joined! And I will as soon as I get back to Ruston.

Hey Allen, I heard from Kyle from kb over on pt.net that you make a flipped manifold kit. Can you tell me about it? And if ou have any pictures that would be great too!!

Build what u want it to look like.
Logs gave been proven over 1100hp.
Just like flipped manifolds have proven hi hp set ups.
Flipping manifolds will need different plug wire routing and lots of heat shielding.
Flipping manifolds arec cheaper way to build twins.

Once u have your layout and done. Turbo support maybe needed.

Ok that's the plan then. I'm going to order some flanges and some tubing and see what I can do

If I go the log route what size tubing should I use for the crossover, the log and for the primaries between the flange to the log. I was thinking 2.25" crossover, 3" log and for the primaries I'm not sure. They only offer 1.5" and 2" sch 10 pipe and I was thinking somewhere in between there would be ideal. So what do y'all think? Also where can I get bent tubing big enough and thick enough for the log? I guess I just need a 90 degree and 45 degree bend, right?

Hell yeah man, go for it, can't wait to see the build!

Check out some of my pictures, I have one of Allens flipped manifold kits. Works great and no issues. This is one of his newer kits, and he has since modified his design to better accommodated space in the engine compartment.

Hey ducky, I can't seem to find a way to find the pictures you speak of. Can you link me something please

http://i39.photobucket.com/albums/e1...t/IMG_1673.jpg


http://i39.photobucket.com/albums/e1...t/IMG_1690.jpg


http://i39.photobucket.com/albums/e1...t/IMG_1689.jpg


http://i39.photobucket.com/albums/e1...t/IMG_1691.jpg


http://i39.photobucket.com/albums/e1...t/IMG_1697.jpg

Attachment 5134 Attachment 5135

a couple of log pics. the driver's side crosses over the front, and Y's into the T4 flange.

edited:
found some more.

Attachment 5140 Attachment 5141 Attachment 5142http://www.ls1truck.com/forums/images/misc/pencil.png

Here's some more pics of a log design, less complete so you can more detail.

Attachment 5136 Attachment 5137 Attachment 5138Attachment 5139http://www.ls1truck.com/forums/images/misc/pencil.png

use 2.5" on the crossover and a min of 3" on the log. Use 2.5" from the manifolds to the turbos.

hope this helps.

thanks so much guys for the pictures and the help. Im thinking Im going to go with the traditional log route with a factory manifold on the driver side crossing over underneath the truck then build a log with a 90 degree angle to the flange. Where can i get sch 10 3" 90 degree bends from? And at the back of the log where the crossover comes in, should I Start the log at 2.5" then buy a 3"-2.5" reducer or do i do 3'' the whole way and weld a vband flange on it and have a 3"-2.5" reducer on the crossover right before it goes into the log?

and what size pipe for each runner on the log? SCH10?

So I did a little digging and found these pictures on ls1tech. This guy used two of the same manifolds from a LS4 car. The manifold used is the one closest to the front of the LS4 cars. I do not have my truck in front of me right now and wont until mid next week. At that time i plan to pull the headers off and mount my factory manifolds and see how hard it will be to make some hot pipes. I will do the same with my LS3 manifolds of off my camaro. If neither of them seem to be a good fit, I may buy some of the LS4 manifolds because they seem to be right on. The only thing Im a little worried about is that the LS4 manifold has only a 2 bolt flange. Tell me what yall think!
http://i227.photobucket.com/albums/d...s/IMG_2154.jpg
http://i227.photobucket.com/albums/d...s/IMG_2153.jpg
http://i227.photobucket.com/albums/d...s/IMG_2152.jpg
http://i227.photobucket.com/albums/d..._manifolds.jpg

Great thing about building your own kit. Building it thevway want. ;)

i like that build, however do you think those will clear the truck accessories? a/c and alt?

Nice setup. Those flanges look like three bolts not two. Very clean looking for sure. Make one for me while you're at it. You'll need a T5 flange for my turbo and 5" down pipe. :)

saw this thread and thought about the log i dropped this morning. Opps sorry for thread crapping. LOL Sounds like a good build.

yea i like to make all my thread titles either perverted of gross if i can lol. And it looks like you are right about the 3 bolt flange so thats great! As far as clearing accesories, I hope so lol. I dont have A/C so that side wont be a problem. Like I said I'm going to bolt up my stock mani's first and see how they look and then try my LS3 mani's and maybe mix and match and if I cant get the right angle for my dangle Im going to buy a pair of these

interesting thread. Show me what you build i should be starting my build once i get back home in dec or in march we will see want to do a single turbo kit also

yea ill be making a build thread when i get it going. just getting the funds and ideas together now

Quote:

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Originally Posted by o2camaross

yea ill be making a build thread when i get it going. just getting the funds and ideas together now

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i'll be subscribing to it, can't wait!