eddierotary

iTrader: (7)

is theres any other way to have the turbos sequencials without having the electronics? have anybody try that at all?, all the tread i read is full sequencial or non i was wondering if anybody have tried something different

eddie

xcannibalx

Ahem.... Learn grammar and spelling.

Second, why do you want to change that setup?

zack4173

iTrader: (3)

you cant stay sequential without the the wiring. you can eliminate some of it but not all.

zack4173

iTrader: (3)

you cant stay sequential without the wiring thats why no one has done it. You can get rid of some of the wiring but not all. search simplified sequential

fendamonky

iTrader: (6)

School:

You should have stayed in it.

I'm not sure what you mean by "partial sequential".. The sequential system is pretty complicated. I'm not sure if there is some "half-way sequential" setup, or what it is you are envisioning... it's either sequential, or it's not. If it's not, it's either done correctly, or it's half-assed.

Maybe (in complete sentences/thoughts) you could expand on what it is you are looking to achieve here..

eddierotary

iTrader: (7)

ok lets put it this way, i was thinking about how this sequencial works, yes the solonoids are involes but everything pretty much works on vaccum and boost right? heres what i as thinking because i put some thought about it

the turbo control valave on the exhaust manifold, for what i can understand about that, it shuts the rear turbo off exaust flowing thru it right? and the charge control shuts front turbo from the rear so the front turbo spool quicker right, well heres what i was thinking, the turbo control acts with one side of vaccum and one side boost if you eliminate the solenoid, and put a check valve on the vaccum side so all it gate is vaccum and get a line for boost side only from boost of the front turbo, then the charge control vale have the same thin, vaccum with a check valve on one side and boost on the other side alreay on the 2nd rear turbo side

so here it should work

give gas, under load

1st turbo spool up

opens up the turbo control

the 2nd turbo spool up

opens the charge control

and it works as sequencial

then when you let off the gas everything (charge control and turbo control) shuts the rear turbo off and the BOV let the excess boost of the rear turbo out

what you guys think

but without the solenoid

it should spool quick like sequencial, maibe a little late but not at 3800 rpm like non sequencial, and yes the timing of the front and rear turbo is going to be off but should be on the quick side

any opinions or or sugestion feel to say

im not trying to defy what mazda did. is a great setup but it just all the boost problem that happens after the years or just by changing something it sucks im having problems with mine and i want to keep it but i cant trackit down

eddie

Mahjik

iTrader: (1)

The stock system works off more than just vacuum (hence the electronics). Take a look at the overview:

http://www.autosportracetech.com/RX-...erOverview.htm

eddierotary

iTrader: (7)

i understand of what the stock sistem work, what im trying to say is i would it work without the electronics, because the stock way all is controlled by the electronics but how should it work without them it should work better that nonsequencial that what im trying to get.

Mahjik

iTrader: (1)

It doesn't seem you do understand how it works, or you would know you can't replicate the system without being able to know what RPM the car is at and react on it (i.e. the electronics). While you could make "some" type of system work without it, it will basically be a non-seq setup as the first turbo will hit whatever target boost you set for the cross-over extremely quick. However, without the pre-spool of your secondary, you'll have a huge drop in boost level trying to get the secondary spinning. You'll most likely have similar performance to a malfunctioning sequential system as that's what happens when the "electronics" aren't working properly.

However, instead of telling everyone they are wrong, do it and prove everyone wrong. IMO, you'll be better off going non-seq in the end if you don't want all the vacuum lines and solenoids.

eddierotary

iTrader: (7)

theres will be a prespool, because the turbo control is going to open first and the charge control is going to open after the second turbo spool up. the line for the charge control is going to be at the rear turbo side so it opens when the rear turbo spools up and theres will be a check valve on the vaccum side so theres no boost closing it when is under boost. im not trying to eliminate it or make it "clean" im just trying to have some sort of sequencials without the headaches that the rat nest nightmare and the solenoid bullsh@t. im not proving wrong to anybody. im just all i seen is sequencial or not, theres should be some of a sequencial setup that it wont be perfect like mazda's but it works without the big turbo lag of the non sequencial

EDIT: i undrstand everything about it. is been two month dealing with it and i search everywere for answers and i know is not wiring or solenoid or valves or rat nest. maibe i did something that i shoulnt done. but is hard to pin point right now

blue94FD

iTrader: (1)

Are you having trouble with your sequential twins? it sounds like you probably mixed up the hoses that go through the lower intake manifold. it seems like you assume those 4 nipples are all just vac/boost sources(which they're not, the hoses HAVE TO be hooked up right for the system to work).

theorie

iTrader: (31)

i can't understand anything this guy is saying. what language is this?

twomucboost4u

iTrader: (9)

So my advice to you sir would be to look up simplified seq. I think I understand what you are trying to say so let me see if I can explain... You want to run non-seq. but you still want to seperate the flow to both turbos so that they might (spool quicker) but you dont want the complications of the wiring to run seq. I think there might be away to accomplish this possibly (possibly) but I think in doing so you might simplify some wiring but complicated some vacuums. The electronics are in place so that it makes for a smooth transition and the best possible spool up as possible. If you eliminate that and try to run seq. your boost pattern will be unpredictable.... If you try to run non-seq. and accomplish what your talking about the amount of boost spike you get when they finally join in spooling is going to be rediculous and probably un-controlable. If you want a more predictable, efficient, reliable, faster spooling seq. system I suggest this. Look up a Simplified Seq. vacuum diagram throw away the stock spolenoids and buy some rob bailey solenoids, and when you get you car tuned you can have them change the secondary turbo from coming on at 4500 to 4000. Youll have less vacuum lines, reliable solenoids and faster spool. This make-shift vacuum set-up your trying to make is probably going to lead to some motor damage. Good luck

Chris

eddierotary

iTrader: (7)

well i have the simplification mod done already and i eliminated what they said on the mod. just my problem is that it just runs out of breath betwen 3800 to 4500 that the second turbo kicks in and when it gets around 6500 the boost goes to nothing. i check everything the way the one website say, the road test and everything it just keep going. im going to keep trying but im going to try my mod see how it works, if i blow it, ill blow it nobody to blame. i just not see anybody trying anything else with them.

EDIT: you say you can adjust the turbo timing, thats with the PFC? and were i can get those solenoids?

fendamonky

iTrader: (6)

It's called broken english.

I think basically what he is trying to do is figure out some way to make the sequential system work without using an ECU designed for the sequential system (i.e. throwing a 13B-REW into an FC and using the FC's ECU to make everything work happily).

If this is the case than it may just be in the OP's best interest to suck up the cost and purchase a complete, correct, wiring harness for the REW. Then replace the existing harness with the new one, and plug in an appropriate ECU.

eddierotary

iTrader: (7)

ohh nope, i have a full FD engine and harness swap, dummy and a PFC with it

theres nothing FC on the FC to control the engine

twomucboost4u

iTrader: (9)

Dying boost hmmm have you checked all your piping? no crackes? only other thing I would say is you have a bad solenoid on the secondary turbo system have you bought a pressure tester? You should charge the system by driving it around for a little then when you stock pull one of the vacuumlines you should hear a wooshing sound since its suppose to keep pressure. If you dont then there is for sure a leak, backwards check valves, or bad solenoid. Also the way the twins work after the transition the turbos stay locked untill I beleive under 3500 RPM you should check boost on the first turbo by driving it around and making sure its holding boost then go up past the transition(4500) and bring it back down to around 3800 dont go below 3500 and do a couple pulls from 3800+ after the turbos are locked and see if it holds boost if not at least you know which part of the system is leaking. also post up a diagram of how you routed the vacuum lines.
The transistion is capable of being moved with the PFC but i beleive you need a datalogit. The solenoids just look up Rob Bailey Solenoids and you should be able to find them.

Chris

eddierotary

iTrader: (7)

im going to try again and check everything im sure that i dont have them backward and well my friend is the one that check the solenoid, but now that i see this im might save some money for the rob bailey solenoids because defenelly is a PITA with the stockers

fendamonky

iTrader: (6)

Had you already stated this?

If not, than it was a reasonable assessment on my part. I'll admit that I have not read all you've typed so far. Trying to make sense of your posts hurts my brain...

No need for you to call me a dummy

eddierotary

iTrader: (7)

sorry buddy, im just frustraded about all of it i didnt mean it. and im sorry about my broken english too

but yes i have a 89 fc with full 93 usdm FD engine and harness.

fendamonky

iTrader: (6)

Not a problem man, no need to apologize to me. I was simply living up to my description somewhere OUTSIDE of the lounge (I need to not do that).


If anybody needs to apologize it's me