^id be more than happy to help out. I need to get my hands on a few things to make this work. I have no problem doing the drilling/tapping of the manifold. one thing i might need to source, is a upper intercooler pipe. Not too sure i want to hack mine and weld on another fitting. Ill see if we have any extra upper IC pipes lying around the shop.

youngysr, does the SAS come with the banjo bolts for the manifold?

Also, would that vacc canister be used to ensure the brake booster is still working properly? id hate to have even worse brakes than i already have (i got the RS )

Anyone have a JDM/EDM Service manual on .PDF?

I have a USDM IX manual for trade

 

From the Evo 4/5 Technical manual.

Secondary air is introduced for approximately three minutes when both of the following conditions are
satisfied:
The engine speed is 4,000 rpm or higher.
The engine speed drops sharply after at least three seconds of full-throttle acceleration.

 

^thanks for your help cossie. Ill be checking my email once im out of work.

 

no probs

 

am a little confused by this, how can this work in conjunction with a dump valve?

The source of air is the same, namely the pressurised side of the throttle plate (upstream).

Since the SAS valve has a tiny cross sectional area compared with the dump valve, and they run in parallel, I don't see how there will be any significant flow through the SAS.

Wouldn't you be far better off blocking the dump valve and only allowing escape through the SAS?

 

A vta dump valve / bov seems to cause the evo to run a little richer in the lower scales iirc (don't know why, something to do with the maf though).

But I did think the same as you

 

^VTA BOV (dump valve) vents out the metered air already compensated for by the MAF. The ECU injects the fuel for the calculated air, when the air isnt there (cause it was vented) the car runs rich. make sense?

what i wonder is, maybe run the OEM DV to the solenoid instead...lol

 

See I thought I was right, just couldn't remember the reason for it lol

 

Which is why I'm almost sure you could caveman this into working on some primitive level. If the bypass air was injected into the exhaust manifold - and the injectors supplied the additional fuel for this air - retard the timing enough...

The elements are there for function... just not exactly control.

How much air do you need in relation to fuel. These are things I simply do not pretend to know. What would be really nice is to simply monitor it on a functioning car and dissect what it is doing. Then decide if it is possible to do it with simpler means.

I'd be happy to just go out and try to blunder thru its operation.
But I need the hardware.

 

SoCal, I had thought about that too, or get rid of it entirely and let the solenoid do its job.

I wasn't worried about the fuelling caused by the maf's calcs, I was more concerned that there is no air if the dump valve does such a good job of dumping it, meaning the pressure behind the solenoid drops faster than the SAS has a chance to take advantage of it.

 

heh... i was joking about the DV going to the solenoid. That would not be conducive to helping the antilag...as the DV opens up fairly often under normal driving.

I really dont want to cave man this together. I want to make sure we have the tuning capability before I make this jump towards ALS. Sure, you can use a throttle kicker and a extra spark plug, and make giant flames out the exhaust, but its not the OEM SAS.

I have some manuals showing how the SAS system is put together (thanks again Cossie) as soon as i can wrap my head around the diagrams, and get a idea of how its working, im sure we could get something going.

what im thinking is that the BCS is not only used to activate the solenoid, but also used to bypass teh vac line going to the DV. Im also weary about the brake booster.
Anyone with any rally experience know what this will do to my brakes having no vac in the manifold? or maybe another way of hooking up the booster to a vac source (like that vac canister shown in the pics)?

 

Just increases the pedal effort. There is a check valve in there so you will have some vacuum for awhile. Its not going to pressurise the power booster if thats what you are afraid of.

 

^yea, thats mainly what im afraid of. I want to make sure my ABS-lacking brakes dont get worse ... id hate to go into a turn and have a panic moment when i realize its harder to apply the brakes than im used to...lol

 

Evo's stop very well without the power booster. Turn the car off sometime while you are still rolling...other than deadsticking power steering being teh suck, the car still stops better than most "mortal" cars.

 

Hi everyone,
SAS retrofiting is some kind of virus Recently bought some hardware for that.... So is there any progress?

Maybe someone has photos or clear scheme, how to connect canister, solenoid to the vacuum lines????
I have Evo VI and IX workshop manuals with SAS schemes, but they are complicated to read... We could change to any other worthfull info