That is exactly my question. I see this big mass of merges at the collector and I feel like it's completely unnecessary if the whole point is separating and sequencing the exhaust pulses. I mean, technically you could merge them a lot sooner if it made sense packaging wise correct?

But then, I know NOTHING about manifold design which is why I am asking.

shut up peasant, how many 69,000hp turbo lambo's have you built?
exhaust runner pairing need not apply here, this is the new hotness.

You want them spaced this way, so it's a 1-2 punch into each scroll. Even pulses won't hit the turbine wheel as hard. More power, more sexy.

Can we just delete all of this nonsense about real exhaust theory. And let him build it as is. Because normally nobody would ever do it. But now someone can do it FOR SCIENCE.

This thread has been great!

1,000hp turbo master:

https://cimg0.ibsrv.net/gimg/www.mia...d3ba81483b.png



vs.

0hp brainiwhack

https://cimg2.ibsrv.net/gimg/www.mia...b40c6d8d95.png

In my 0hp opinion, doing the former is not much different than a standard manifold. and before Boost calls me a retard again. I realize this:


https://cimg4.ibsrv.net/gimg/www.mia...e6af8f0aff.png

Your drawing skills impress me more and more every day.

I'm tempted to make a tally of ALL the completely, blatantly, utterly silly and clueless mistakes done so far, because this has got to be some sort of record.

The only difference between this guy and your typical every day n00b, is that the n00bs usually admit that they're clueless and seek help.

Love,
18psi

we literally discussed this behind the scenes yesterday :laugh:
just let the guy do all of it for entertainment/science. kinda regret not deleting the vvt oiling posts now. that woulda been funny

I really think it would have been great to let the guy spend hours and hours doing full welds. THEN we tell him.

OP is surprisingly quiet :party:

I started to feel like a dick yesterday, so I erased some of my comments. In light of recent discoveries, I think they were totally accurate and warranted.

All of you must be having a field day right now. I had written down my firing order in a booklet but I think I must have been pretty tired last night as I mixed up 3 and 4. Yeah I'm gunna switch them around now.

I'm reasonably sure almost ALL inline four cylinder four stroke engines have the same firing order. It's a veritable necessity for balance.

Yup, all but the really odd ones.
https://en.wikipedia.org/wiki/Firing_order

Some seriously cool fab work with real talent. Guy should be well paid for work like that doubt many here could afford it on our cheap sissy cars. Could use some technical engineering help though for design. I think free handing truly equal length requires quite a bit of talent, skill, extra time and a whole lot of dumb luck. I prefer to see designs coming from computer models.

Lost most of my day working on this supercharged rotary boat, but I have my final mock up done on the mani, and I got a start on my intercooler mounting and charge tubing

Pretty pleased with this manifold, the runners are so so close to each other, such a tiny amount difference, this is truly an equal length system. Can't believe I mixed up 2 runners.. A rookie mistake, one I've never messed up before. Eh, it's ok to screw up here and there. the bottom line is the quality of the final product, and that's exactly what it'll be; a quality product. Just so it's clear this manifold is now in the proper scavenging order..
https://cimg9.ibsrv.net/gimg/www.mia...e7838f2ce.jpeg
https://cimg0.ibsrv.net/gimg/www.mia...d79e6a57d.jpeg

https://cimg1.ibsrv.net/gimg/www.mia...5aa7166e6.jpeg

https://cimg2.ibsrv.net/gimg/www.mia...5c3b909e3.jpeg

https://cimg3.ibsrv.net/gimg/www.mia...724c634b3.jpeg

https://cimg4.ibsrv.net/gimg/www.mia...bd667eee8.jpeg

https://cimg5.ibsrv.net/gimg/www.mia...e89ce2c63.jpeg

You work fast. Nice work.

Any heat shielding to be made?
It looks like the engine bay will boil.

Great work. Glad to see the VVT is no longer blocked off. That manifold is looking real nice. Please keep posting, some of us are really enjoying this.

Much better.