FC_fan

iTrader: (2)

what do you guys think of this manifold by powered by max? functional and worth their $650 price or overpriced paperweight? looks interesting to say the least, it gets style points from me.

http://www.gtfactory.jp/cms/e107_plu...topic.php?4992

iani1.1

iTrader: (13)

that thing does look pretty cool

Turbo II Rotor

iTrader: (2)

Doesn't look bad but I wouldn't put a collected manifold on a rotary.

FC_fan

iTrader: (2)

^could you elaborate? I don't know much on the manifold or turbo front. trying to learn since I will be building my first turbo rotary sometime along.

-Crash-

A collected manifold wouldn't be a good idea on a rotary if you were to keep the twin scroll style hot side, but a collected manifold on a non twin scroll is fine. Also this manifold is very short which is something fabricators have been doing more of lately to achieve a "quick spool" set up which, to my thinking anyhow, is why they named it a "drift spec" manifold (more low end is better while drifting). So if you’re not concerned about having an equal length header (to keep the pulses in line) then you probably shouldn't be worried about your manifold being collected or not.

Why is everyone on that forum shitting over this manifold, its nice, but thats about it, its not like its a Full Race manifold lol.

Now this is GREAT fab work.
http://www.honda-tech.com/showthread...267900&page=20

FC_fan

iTrader: (2)

because, unlike here, some people don't know what function is and simply look at form.lol. with the exception of slava on that site (speaking only for the few FC guys on there).

thanks for the explanation. I was thinking of running the stock s5 manifold and turbo on my s4 t2 block BUT since I don't have a manifold or turbo yet, was thinking of getting aftermarket/better items. I don't know if I should shoot for my 300-350rwhp out of the gate though because it's my first build. so still juggling whether I should just get the s5 units and start with that.

Turbo II Rotor

iTrader: (2)

A twin scroll manifold and turbine housing will spool quicker than a collected setup and I believe twin scroll turbine housings flow a little better but don't quote me on that.

I'd also rather see dual egt's than a single to compare front and rear rotor temps, that is if you're going to utilize it.

-Crash-

^$650 is a bit over priced for that manifold, if you want something that flows better than the stocker then look into the cast HKS manifold.


$395 for the HKS cast.
http://www.rotaryshack.com/manifolds.html

driftfcbuckey

iTrader: (8)

there's no way i'd pay $650 for that... the housing flange looks super thick (good) but i actually have to agree with Turbo II rotor for once...

why spend $$650 when for an extra $300 you can get the best??

http://www.full-race.com/catalog/pro...oducts_id=1869

-Crash-

^Yup.

Daviticus

It's so JDM it uses a Racing Beat flange.

Looks good, and it's the same design as the manifold I'll eventually build, but a touch on the expensive side.

RXILVER7

iTrader: (2)

Looks nice. But not for that price.

NoPistons!

iTrader: (3)

Looks good. Although if that's an egt/o2 thingy at the collector, i would sooooo not put that there. You SHOULD run sensors that can take that kind of heat HOWEVER, i've always been taught/told running your o2/pyrometer on the downpipe would yeild longevity and still be able to get a decent reading to tune by. If there's a legit reason for having a bung there, i'd love to hear it just so i can learn, you know?

I'm a fan of MULTI cut manifolds. Pie cuts. All that ****. It looks absolutely beautiful.

I'm picking up my tig shortly and i told friends who wanted stuff done if i can't do pie cuts and run as many beautiful beads as my little bleeding heart desires, i wont make them squat. Well, i will but i wont have fun doing it.


NOBODY GIVES A **** WHAT YOU WOULD PUT ON A ROTARY. Hating *** ************....

driftfcbuckey

iTrader: (8)

hahaha ^^^ Dick.

Turbo II Rotor

iTrader: (2)

Putting the thermocouple in the down pipe makes it useless. You want it a couple inches from the exhaust port and you want to be able to compare front and rear rotor temps. Also pie cuts flow like **** learn some fluid dynamics.

My manifold...

Turbo II Rotor

iTrader: (2)

Btw pyrometer doesn't mean what you think it means.

RXILVER7

iTrader: (2)

FC_fan

iTrader: (2)

then why is everyone all about getting rid of s4 twin scroll turbos and throwing s5 **** on there car? did a lot of people (some very knowledgable) get confused?

I have no idea on prices, I just saw that crazy looking thing and decided to ask for the forums good word. nice info in here so far, edumacate me some more.

nopistons- Your comment to turbo II rotor seemed a little blatantly offensive and unprovoked. hilarious as it was. You know some **** so I'll let it slide but let's leave the fighting out of this one and just state some facts in a knowledgle manner, not a "I will tear your f'ing head off because my opinion differs from yours" manner. mkay? I do appreciate your input. < my own thread police.lol

Turbo II Rotor

iTrader: (2)

S5 are also twin scroll but with a divided manifold, symmetrical volutes, larger wastegates, better flowing turbine housing and no flapper door BS.

S5 is a true twin scroll.

S4


S5

FC_fan

iTrader: (2)

ok, maybe I understand. I had understood it that s5 were not twin scroll but ball bearing I guess. didn't research enough, just saw people were swapping for a less complicated system and better performance. I thought for sure I saw someone say once " going to s5 and finally get rid of the stupid twin scroll system" but maybe I misremembered. Most people switch for a better flowing, better performing system then and the wastegate is marginally better.

google searched the site, this answered all my questions on the matter. https://www.rx7club.com/2nd-generation-specific-1986-1992-17/why-s5-not-twin-scroll-671574/

so now, what aftermarket manifolds are out there? also, how would I use an aftermarket wastegate? I really don't want to deal with the boost creep problem or porting the stock one. I remember seeing one guy use 2 wastegates on... I wanna say the manifold or downpipe? it was custom stuff. another topic I know very little about, currently reading random threads in the turbo section.lol

AAAAAAAAAND curious about recirculating bov's instead of venting to atmosphere. where do they recirculate the air? can it be routed to spool the turbo while shifting, safely? I thought I heard rally cars had a system that kept the turbo spooled during shifts (I would assume what I previously stated?). hmmmmm, maybe I should now go start a thread in the turbo section.lol

TweakGames

iTrader: (3)

oohhh man. Yes, I would search a bit more before posting anything.

FC_fan

iTrader: (2)

yes, I just did and found lots of useful info. thanks, I did post that just thinking of things and did not search first. noob moment.

JWteknix

iTrader: (2)

y not keep ur s4 stuff get a bnr turbo and call it a day
bnrsupercars.com

Turbo II Rotor

iTrader: (2)

Don't start new threads, read the old ones. All this information is already out there.

-Crash-

The purpose of a recalculating the BOV, for the most part, is that on a system with a MAF (such as our cars) the air that the BOV vents has already been metered by the MAF and the ECU has already planned for the right AFR. So when you vent that air instead of sending it into the combustion chamber you end up with a higher AFR (more fuel to air). This causes slight hesitation when you get back on the gas.

You can vent to atmosphere without any issues by going with a standalone to remove the MAF and switching to a MAP sensor (Manifold Absolute Pressure) A map sensor reads the pressure in the intake manifold and adjusts the AFR accordingly.

A correct recirculating system will have the BOV after the turbocharger and recirculate the air inbetween the turbocharger and the MAF. This way you keep the metered air in the system, and keep the turbo charger spooled up.

Also wastegates are used to vent the exhaust gases BEFORE reaching the turbocharger so they always go directly on the turbo manifold. On a rotary two wastegates are often better due to the fact that you can control the gases from each rotor insted of pulling gases from each runner.

Hope this helps.

P.S. The S5 are not ball bearing, not many cars have BB turbochagers, even new cars.