This thread is INSANE. I love seeing all the custom work (especially RX8PR's work - BEAUTIFUL!!), let's keep the pictures coming!

 

All those intakes are making my insides feel funny..

 

Have you ever run into and issue of a stock intake (FD, RE, ect.) becoming the absolute weak link in a setup? I'm just wondering exactly how soon it becomes an issue, what it would look like on a dyno sheet when it becomes overwhelmed...

 

I wouldn't say we have, we've hit around 800whp +/- depending on what we were trying on the RE, I'm not sure it would look like anything really significant. I'm sure either car could have made more with a different manifold/TB setup. Just at that point in time that's what the customer was willing to use. Once you cut open and clean up a RE upper it is not a bad piece.


~S~

 

Is the RE UIM, once cleaned up, a better option than a REW UIM (Cleaned too)?

 

Made this for my 12A. Built with tuned lenght runners, and bellmouths inside. Cheapo 90mm Ebay TB. The plenum itself is detachable, so other size plenums could be tried.. Made 506 RWHP, at 16psi.

 

Haven't tried it with a FD one as much as the RE one. I can't give you a honest assessment.

~S~

 

Excellent design I would change little.

~S~

 

Very nice manifold!

What are size of runners?

 

 

more crisp response
quicker spool times

is it considerable difference in those? ie 1/4 mi differences or dyno curve differences?

 

Ernie, That's an interesting design. It would definitely cut costs down for building one completely from scratch. What does the inside of it look like, if you don't mind me asking?

 

Runners are 1,5 inch. Lenghtwise, i have it written down somewhere, but cant remember where i put the note I used a web based calculator to calculate the lenght of the runners, they can be found floating around the internet.

Thanks BTW, im happy with the way it performs.

 

Hears the inside!

 

 

Here is what Sean was talking about. I had an adapter made to use the REW TB and use the stock linkage and clear oil neck.

 

Sweet pics , keep em comming

 

Intresting, what port/turbo you running? whats the set up's response like...???

 

Extend port in the inlet, race port on the exhaust. Turbo is a Turbonetics 62-1. It starts boosting at about 3000 rpm, and kinda takes off after that.. Full boost at 4400 rpms. I have never really went beyond 16 psi, it has no boost control, just the two wastegates.

 

I now have a Hard on from seeing this thread. My hats off to you guys who fabricate such master pieces. Interesting, i wonder what the folks at Mazda R&D would say about some of this master piece creations.
I now want to take welding and metal fabrication classes

Great JObs Guys

 

Before I finished the turbo setup...

 

That 3rd picture is mine. I've cut apart and hollowed out every RX-7 manifold that I could find. That one was an S4 TII. Then I reweld them back up. They look completely stock.

 

wouldn't that eliminate the reasoning behind seperated primary/secondary butterflies though?

 

Where is the secondary fuel rail? Did you buy the the flange or make it?

 

are there velocity stacks inside the mani?