Turbo Hot Pipe design/ log's vs headers?
 

Hey guys. I'm in the process of building some hotpipes and well..Just looking at design ideas. I saw this and was kinda interested.. Basic, does't take up much space.. Looks like it may flow well. What do you think? Or just flip some truck shorty headers with V-bands installed? Manifolds are out of the question. Flanges are to large. (attatched photo was barrowed from another site)

How much work do you want to put into the project and how much power are you trying to make? I'd flip some truck manifolds and build a 2" crossover. I would do truck headers before I did manifolds like that.

Personally I love the look of logs like that. Compact and still good plug access

Well I'd like to see 650+. I could see maybe turbulance from how they dump. So maybe lead to higher back pressure?? The guy on the other Forum was only running 4psi and trapping 117MPH (I think).

Thats what I'm saying.. Basic, clean, plenty of space

Truck manifolds have been ported and used at 1700hp, they are cheap and work well as far as heat retention. Find a set of truck manifolds and tie them to a 2" crossover pipe and let her eat.

I'd love to use truck manifolds but its in a Thirdgen camaro and the Power Steering gear box is in the way. I know you can cut the flanges off and weld V-bands but its cast iron and seems like a potential headache. Its been done before. I could use Truck Shorty Headers and weld v-bands to them, or custom build mild stell headers and get them coated, or check into log manifolds which is kinda ify.. Not a bunch of info on them.

i'd recommend against the log style as i built a set for my last car for a twin MPT70 setup and it was a headache. save yourself the money and hassle and just pick up a set of headers from Stainless works. it may seem like alot of money at first but it is definately cheaper than the other route.

Go with logs, im going to be building another set for my third gen also.

3rd gen camaro u say? :secret2:

Yes Sir.

shorty truck headers are way bigger and harder to fit, i recently discovered this the hard way. you may end up doing what i may have to do, chop cut rebuild shorty headers to suit your needs.

logs generally flow like crap because of the way they dump but there are always exceptions. also try 2010 camaro manifolds, and corvette mani's too. You can easily hit your power goals with logs but they create turbulence and pressure that will crack the welds where the cylinders closest to the turbo meet the log. get a welding engineer to tell you how to weld it then Post Weld Heat Treat them or be okay with fixing cracks multiple times per year.

Thanks for the heads up on the truck header problem. I figured they'd work. Oh well.In regaurds to the lod, I can see how if the exhaust just dumps into the actual log portion, but if they gradually flowed in like above or maybe more it would make a smoother transition. 4SFEDSS Your going with logs on your next build? Like the ones pictured above or you making it like your last setup? Just an Idea.. My 05 GTO has a regular header on the Driver side and a Forward facing custom built header that the driver side dumps in the middle of it.

you should try fabbing a set of tubular headers. if you have patience and a good imagination then it will all come together rather easily. just get a junk LS1 head and tack up a couple primaries on the bench. you will be surprised what you come up with.

why not try a pair of C6 ls2 manifolds? those are compact and much nicer looking than the trucks

that is what i used, forward and down

Since you are pushing all the exhaust that is coming out of the heads into a tiny hole you will always have some pressure there...that is the idea. The way he has them swept towards the direction they are flowing I dont see them flowing any less than truck manifolds.

Cracking has nothing to do with logs... that would be the material used and the method/person welding it... That pertains to any and all manifolds/headers that are welded.

Im going to stick with the factory manifold on the driver side then have the crossover like I have it now, but instead of having the driver side pass through the entire passenger side log im going to try to get the pipe under the log and merge closer to the turbo flange. It made awesome power the way it was im just not sure how much turbelence it was creating. Im also thinking about going with 304 stainless, I had some cracking with the last log set up but it was entirely my fault. I ground the welds down way too far so the pipe was pretty thin in those spots.

you can go all out and do Schedule 10 stainless

Log manifolds suck for flow. There is alot of turbulence where each of the 3 runners meet the body.

They definitely are less efficient compared to headers for sure.

OP, the log manifold will probably work fine for your power level, especially if you need the space under the hood.