EA81 supercharger revamp by Tweety

dfoyl · Post by **dfoyl** » Sun Jun 23, 2013 11:58 am

I have the O2 sensor in a MPFI L series y-pipe. I'll have to plug the hole but it'll save buying a new sensor.

Tweety · Post by **Tweety** » Sun Jun 23, 2013 12:03 pm

well very itneresting.

page 18 of part 2 (has 162 pages) has the SCHEMATIC drawing of the sPFI system. The MAF has the 3 wires. one to the air control valve, one to the throttle sensor and the third to the ECU. is that how you read it guys? will have another look for some wires in the box. there were some there that didnt fit anywhere.

Tweety · Post by **Tweety** » Sun Jun 23, 2013 12:03 pm

thanks Dfoyl. is it a single wire type?

Tweety · Post by **Tweety** » Sun Jun 23, 2013 12:12 pm

have messaged you Deano

Post by **TOONGA** » Sun Jun 23, 2013 12:27 pm

Tweety wrote:well very itneresting.

page 18 of part 2 (has 162 pages) has the SCHEMATIC drawing of the sPFI system. The MAF has the 3 wires. one to the air control valve, one to the throttle sensor and the third to the ECU. is that how you read it guys? will have another look for some wires in the box. there were some there that didnt fit anywhere.

Airflow connector (MAF)

: first connector not used
R : battery +
B : ground
W : signal (ECU)

The same info as above in VOODOO'S guide

TOONGA

Tweety · Post by **Tweety** » Sun Jun 23, 2013 1:51 pm

Its ok guys. have found the part of the loom with the MAF connection. Busy marking every wire now. lots of fun. Tony

Tweety · Post by **Tweety** » Sun Jun 23, 2013 5:15 pm

anyone recognise this electrical vacuum thing with push button on the end?

tambox · Post by **tambox** » Sun Jun 23, 2013 8:56 pm

Looks like a Vac solenoid, with a bleed to air, to allow the Vac to release.
On- joins the two pipes.
Off- shuts one pipe and lets the other bleed to air through the "push button" or vent.

Tweety · Post by **Tweety** » Sun Jun 23, 2013 9:56 pm

but is it a ea82 spfi part? cant find where it goes

Gannon · Post by **Gannon** » Mon Jun 24, 2013 6:04 am

Where abouts was the plug on the loom that matches it?

Sent from my new touchy phone thingy

steptoe · Post by **steptoe** » Mon Jun 24, 2013 7:52 am

Not a push button action is it Tony ? Just a cap to protect the air bleed off ? You can connect a fused power and earth supply up to it, suck and or blow with power on and off to see if it even works first, if it does, you get an idea of when it does work.
I forget whre they go, never registered what they control but notice the hard line ?

Some sort of control for the fuel charcoal cannister I faintly recall, so it bleeds off fumes to the ...rather, prevents charcoal cannister bleeding air off to th intake at idle.

Mark it for the BIN in your case, just don't toss it in case you o need it for something important - like your Brumby project - you are gonna have to get one to use that SC somewhere

Tweety · Post by **Tweety** » Mon Jun 24, 2013 10:14 am

yeh, my line of thinking is anti pollution stuff. I cant find the plug on the loom it matches to. Think its safe to put it aside.

YouTube · Post by **El_Freddo** » Mon Jun 24, 2013 8:01 pm

Tweety wrote:yeh, my line of thinking is anti pollution stuff. I cant find the plug on the loom it matches to. Think its safe to put it aside.

Put it in a safe place "just in case" - but not one of those safe places where you never find it until you replace it... I've done that too many times

Cheers

Bennie

Tweety · Post by **Tweety** » Thu Jun 27, 2013 5:23 pm

I have started a new thread on USMB about the pro's and con's of adding a supercharger to my EA81.

And one knowledgeable fellow posted these photographs of an EA81 with a Hitachi twin injector SPFI unit that resembles the Subaru unit.

I've asked him what model Nissan it comes off. Imagine a blow through supercharger using the second injector?

YouTube · Post by **El_Freddo** » Thu Jun 27, 2013 10:36 pm

Tweety wrote:I have started a new thread on USMB about the pro's and con's of adding a supercharger to my EA81.

And one knowledgeable fellow posted these photographs of an EA81 with a Hitachi twin injector SPFI unit that resembles the Subaru unit.

I've asked him what model Nissan it comes off. Imagine a blow through supercharger using the second injector?

Very interesting. I recognise that anywhere - it's from a 1989 Nissan D21 pickup with a VG30i engine as I recall. With your blower this would be a sweet little setup

Seriously though I don't know this setup, I just read about it on your thread on the USMB. Might have to see if I can track one of these down to see what might be able to be done - but I wonder if we got these in Aust with this engine?

I was also going to add that the twin injector setup would need to run both injectors together - unless you messed around with one of the injectors to make it bigger with the other as the secondary one for when you're on boost. I say this as I spoke with a mate tonight about the MPFI system and he reckons they went with this as 4 injectors pulsing twice a cycle is easier to get a good idle from than if you have two bigger injectors in place of the four little ones - it will run fine but the idle is usually the issue apparently.

But a setup like this might be able to be tinkered with to fit your SPFI system and the secondary injector setup into - just have to get the injector size right!

Cheers

Bennie

Tweety · Post by **Tweety** » Fri Jun 28, 2013 8:38 am

Well it just might give us a future option.

Seems on Nissan threads on forums the VG30i wasnt released in Oz. I've read where they suggest its an import but a common one for owners to seek out in the US.

steptoe · Post by **steptoe** » Fri Jun 28, 2013 11:15 am

The 84 super grade leaded Cordia turbo ran a throttle body injection .........and they went like stink

Post by **TOONGA** » Fri Jun 28, 2013 6:36 pm

the top of that elctric carby looks like the ford 3.9 jobbie

which has the same footprint as a weber

TOONGA

steptoe · Post by **steptoe** » Sat Jun 29, 2013 8:07 am

I have smeaky suspicion that was made by weber for the Ford Jules, is that yours to look see ? I could do with one of those EA81 spfi manifolds !

YouTube · Post by **El_Freddo** » Sat Jun 29, 2013 9:50 pm

steptoe wrote:I have smeaky suspicion that was made by weber for the Ford Jules, is that yours to look see ? I could do with one of those EA81 spfi manifolds !

I'd go the EA82 SPFI manifolds

More of them around than the EA81 variety

Cheers

Bennie