Custom ported and CNC throttle bodies, upper and lower manifolds by Synergy Composite

synolimit

The flow results are in but sadly only for 1. The lower before and after and 2. The upper and lower together after.

We will be doing more soon with 1. TB before and after, 2. upper before and after. 3. upper and lower before. 4. everything together before. and 5. everything together after.

We have taken this on to see where we were and where we could be to improve for a before and after of everything and by themselves. I specifically machined a port template for the application for this purpose. The stock flow on a regular 370z lower manifold is 335cfm. We then ported the lower and when complete we managed to get an extra 4 to 6 cfm per port! Here is where it kind of sucks...since we where pressed for time we only got the upper port matched result without the throttle bodies to the lower. The overall flow for the entire upper and lower port matched assembly now flows 270cfm. We obviously need the before upper and before upper/lower.

Not a lot of material is left to try and go bigger on either same. We can see the bottle neck is in the upper plenum design but it's a good "out of the factory" part for production purposes. We removed as much as we could get away with to allow sound structural integrity. I'm sure you FI guys don't want your mani to burst.

Everything is still set for some more testing as well so I guess are data isn't completely said and done but most of the hard stuff is addressed!

Stay tuned!

Shawn

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13 370z-

Rusty

Nice work. Can you get a before and after of the throttle bodies, upper and lower bolted together?

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synolimit

Yep that's next, sent some to him just now.

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13 370z-

jrb55gh

I know it would be a lot of extra work, but it might be important to know the flow of each port through the whole assembly including throttle bodies. The idea is to make each port in the assembly flow the same. Luckily this is not wet flow so that should allow more freedom to shape ports to achieve equal flow in all the ports.

synolimit

That can be arranged and should be done to make sure the performance in all cylinders is the same. The problem is to do that on each build would sky rocket the cost of porting as the porter will have to go back and forth multiple times.

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13 370z-

jrb55gh

Agreed, flow bench matching in production would be cost prohibitive. Based on some experience I have had in the far past with v8 manifold porting there are probably some areas in every upper and lower manifold that need to be touched and some areas that should be left alone. Find those areas and verify with flow testing on one prototype pair of manifolds, then duplicate the pattern on production manifolds. The matching won't be perfect but chances are it will be better than stock.