Is it safe to presume that the as pictured manifold was the one recorded and it did not have the Plenum Spacer?
Are gains negligible with FI?

 

Did you read the thread? Derpsville indeed.

 

no, JUST HERE 4 DA PIX

 

say something stupid again

 

It was more sarcasm, I was being genuine though towards not seeing mention of gains with use of the plenum spacer on FI applications. Guess I’ll just have to get one of my guys to CFD flow characteristics

 

RTFT.

 

Everyone and their mother is "planning" to do all sorts of testing and post all sorts of results.

So far, less than a handful of people posted anything even close to data, and of those only two showed some semi-decent a/b comparo's.

So you're more than welcome to contribute.

 

CFD doesn't tell you squat about power potential in a manifold unless your engineer can model the harmonics and complex interactions between each cylinder pressure waves and how they take turns pulsing through the throttle body.

Just like a a shiny hogged out intake port might show wacky CFM gains but make less power everywhere than a lumpy, tiny, OEM port full of sharp edges.

That the S2 appears to only make a tiny bit more power in a very narrow band is testament to this. Looks like it should make more power everywhere. Doesn't.

 

I'm just upset the developer of the product didn't perform the testing.

 

Maybe they did!

 

Appreciate the reply,
Was curious if S2 released the spacer "because they can" aligned with the aformetnioend results for if its truly a band-aid that fixes some aspect of the volumetric distribution/efficiency.
Maybe ansys will know, maybe Ill have to wait to dyno back to back for closure.

 

I am highly incredulous of any chart which shows a stock 01-05 manifold holding a flat torque peak to 6,000rpm. Use FM's comparison to judge between the two, but forget about the scales. Neither is accurate to what you would see at sea level.

 

this implies that the product was actually developed.

vs you know.....chopping off a honda flange, welding on a miata flange, making mold, and casting.

I bet. And when it didn't perform, they left out the data .


But despite all this, It's still a cool new product, esp for the money.
Which shows just how low our IM standards are

 

Taken alone, this seems like a pretty cool alternative to hunting down a flattop... but you have to also buy the skunk throttle as well. So it's really more like an 800 dollar flattop than a direct alternative. *googles current price of flattop manifold* Oh well nevermind, this actually appears to be a great deal.

I'm still kinda of amazed at how no one has come up with a manifold that makes better power than a mazda factory manifold. Did the old mazda engineers really have better tools for modeling intake manifolds than we have today? Or does the miata's head just suck so bad that it's impossible to fix by improving the intake?

 

the latter

 

Kinda makes you wish that someone would develop an aftermarket head for the BP block, doesn't it... That will never happen though. Even the CNC machined heads that 949 offered were too expensive for majority of the cheapskate miata owners.

I may not get rid of my VICS manifold, since my primary use of the car is autox, but i am glad that S2 decided to expand our options with this manifold. They didn't have to release this manifold for us and it probably isn't even that profitable of a market expansion for them. A big "Thank you" to 949 and FM for giving us some legitimate data to understand how it will perform on our motors.

 

I'm glad well get to see S2 vs SQ numbers on the same dyno. I was amazed at just how much less power the FM car made overall compared to what I do here at sea level. That car had a 3071 (or 76) with 27psi and made WITH the S2 manifold what i make on 20psi out of a 6258 here.

I guess its safe to say there will be more gains to be had at sea level?

 

^ In Colorado (and parts of New Mexico) power wise, is like loosing a cylinder ot two. Is the price we pay to live in this wonderful place.

 

^^^ It’s awesome. I lost 95hp in my cobra moving to New Mexico from Florida(500hp vs 405 hp) It’s terrible, my car felt soooo slow. I at least upgraded the blower now. 20lb pulley only makes about 15lb up here. Car feels 10000x faster on 17lb pulley at sea level than it does on the 20lb pulley where I live. Anyways, back to topic at hand.

 

An F/A-18 at 50,000' is an absolute dog!