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New turbo manifold
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clay
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1972 Chevrolet Nova

PostPosted: Tue Jan 14, 2014 10:27 am    Post subject: New turbo manifold Reply with quote

The log manifolds I made have finally warped to the point a gasket won't last longer than a quick trip up the road. I knew I'd have to do something different one day and Paul's recent header build sorta motivated me. Here is a pic of the manifold / header tacked up. I didn't take any progress pictures but I will on the other side. Anyway here it is. Hopefully I'll finish it this week and get it back on the road. I'm wondering if losing the volume of the log manifold will make the turbo's spool faster. We'll see. Clay

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SMOKEmUP
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1979 Chevrolet Camaro

PostPosted: Tue Jan 14, 2014 12:56 pm    Post subject: Reply with quote

Looks good. What type of pipe are you using? Looks like sched40.
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Paul P
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1971 Chevrolet Chevelle

PostPosted: Tue Jan 14, 2014 3:26 pm    Post subject: Reply with quote

First of all Cool. What gave you the idea for the collector shape? Kinda odd looking that is all. Function not fashion I always say. Still looks like the black iron pipe will do it and keep heat in the system quite well. Hopefully these will last you a bit longer than the logs with some improvement in performance too. Keep em coming. Glad I could drum up some inspiration.
Paul

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af2
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1933 Willys Coupe

PostPosted: Tue Jan 14, 2014 8:49 pm    Post subject: Reply with quote

SMOKEmUP wrote:
Looks good. What type of pipe are you using? Looks like sched40.


LOL not those bends...

Looks good Clay, I like the turbo stand!!
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clay
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1972 Chevrolet Nova

PostPosted: Tue Jan 14, 2014 10:37 pm    Post subject: Reply with quote

Yeah it's schedule 40 mild steel for now. The collector shape is absolutely based on funneling exhaust to the turbo. I didn't know what to do with it years ago and that's one reason I wound up with log manifolds. It's such a small opening to transition to and not much length to do it in. I had an idea I had been thinking on and it sorta took shape as I was making it. I'll take some better pictures of the completed header tomorrow and get some opinions on some trains of thought I had. If it works I can remake it in schedule 10 stainless - mild steel is cheap to experiment with and easier to work with (as I know Paul knows......)Clay
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af2
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1933 Willys Coupe

PostPosted: Tue Jan 14, 2014 10:58 pm    Post subject: Reply with quote

WOW sch 40? I guess you bought the bends..
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clay
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PostPosted: Tue Jan 14, 2014 11:58 pm    Post subject: Reply with quote

Yeah they're weld elbows. Clay
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Wed Jan 15, 2014 1:14 am    Post subject: Reply with quote

im having a hard time warming up to that collector. seems like it would be a lot of turbulence. i get where youre going with that. im just skeptical. im guessing you dont have an extra couple inches to put bends there ?
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Paul P
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PostPosted: Wed Jan 15, 2014 3:35 pm    Post subject: Reply with quote

10sec.et wrote:
im having a hard time warming up to that collector. seems like it would be a lot of turbulence. i get where youre going with that. im just skeptical. im guessing you dont have an extra couple inches to put bends there ?


That was my thoughts. I was also thinking if you wanted to get fancy you could angle them all in one tilted direction so that they would spin the impeller. I know it has to fit on the car too which is usually a gating factor. The funnel shape might work.

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clay
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1972 Chevrolet Nova

PostPosted: Thu Jan 16, 2014 12:09 am    Post subject: Reply with quote

Here are a couple more pictures. I agree with you guys - it's not the best design for flow - it's just sorta what evolved in this try. I have visions of everything nice and tapered and streamlined in the collector but making it a reality is a struggle. If I make a collector that is even 3" long then that's all the way to the front port so if have to do some weird turn then a 180 back up and it could wind up a more totureous path than my plenum idea. After a while I get tired of thinking about it and just build something. Clay








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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Thu Jan 16, 2014 3:25 pm    Post subject: Reply with quote

give me some dimensions and ill see what one of the fab guys can come up with in solidworks. we might be able to design and build you a pair of collectors and send them to you. cant promise anything but we will try.
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Paul P
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PostPosted: Thu Jan 16, 2014 11:27 pm    Post subject: Reply with quote

Why not try to do something like this?


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1971 - Chevelle 408 SBC N/A
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Big Dave
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PostPosted: Fri Jan 17, 2014 10:16 am    Post subject: Reply with quote

I don't think a merge collector would be required. It is the heat content that you want out of the exhaust not the volume of gas flow like you would expect from a water wheel (that uses the weight of the water, gravity, to pull the wheel down). I do not believe that you need steam pipe either as far as that goes. 16 gauge mild steel will retain enough heat in the distance you have to travel and it will be a lot easier to work with. Once you get a design you like you can coat it in aluminized ceramic water glass to retain the heat.

Big Dave
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clay
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1972 Chevrolet Nova

PostPosted: Fri Jan 17, 2014 7:05 pm    Post subject: Reply with quote

Dave - I agree this heavy of pipe isn't needed - it's just readily available and cheap for basically a proof of concept trial.

Paul - I looked at all sorts of headers to use or modify but thought it wouldn't be much harder to make some. Plus it's fun right.....those you have a picture would put the turbo pretty high and so far back on the driver side I would have to move the master cylinder to get a down pipe out.

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clay
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1972 Chevrolet Nova

PostPosted: Sun Jan 26, 2014 11:16 pm    Post subject: Reply with quote

Here are some progress pics of the other side. They might help visualize the plenum. I'm going to take 10sec.et up on his offer when I get time to do a decent sketch. Clay










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