EA81 supercharger revamp by Tweety

steptoe · Post by **steptoe** » Mon Sep 02, 2013 8:00 am

think EA81 efi is confuse me, this is L Series EA82 spfi manifold and injection eh, likely came out in them after afm was upgraded from flapper to hotwire on mpfi EA82.

On a non sube hotwire set up, saw all sorts of running problems, fixed by fitting another afm coz it was noticably better with afm disconnected. The old afm was pulled apart to find it had two odd looking sensors either side inside the air tract - looked like perforated button cell batteries, facing each other. For some reason Mitsu used a cardboard like liner of some sort in this tract. It collapsed, allowing carboard to cover one of these perforated sensors - a BINGO moment not helpful here

Subydoug · Post by **Subydoug** » Mon Sep 02, 2013 9:09 am

Your fuel map will just be a little bit out. The o2 sensor isnt going to be doing anything under load or flat out. Im not sure how one goes about adjusting the fuel map of those ecu's. You may have to make a circuit that goes between the ecu and afm which will allow you to adjust your fuel at full stick.

Or just slap megasquirt on it and say goodbye to 80's tech

.

Regards

Doug

Tweety · Post by **Tweety** » Tue Sep 03, 2013 2:57 pm

I hear you Doug but aint listening

Been working on this trike for 5 years now. Simply put- am at the very end of it all. 6 months ago I put it up for sale due to one thing after another. Getting this FI system was a beginning to an end and it hasnt come yet. Cant see myself slapping on yet another system. I'm not a young guy anymore and my health is taking a battering doing this stuff. But thats another story.

If I dont do much good tomorrow with the injector clean I will go to this place in Mitcham. I met a new member to our trike group yesterday. He was from Traralgon. He has a 1835 cc VW engine and had fuel injection made for his engine by this mob that he vouches for highly.

Have a peruse on their interesting web site.

http://www.efihardware.com/index.php

Subydoug · Post by **Subydoug** » Tue Sep 03, 2013 8:01 pm

All corny smiles aside, what you have now is an engine that has all the neseccary hardware to run EFI. Might be worth setting aside some time with Bennie or someone else who is savvy with motors and fuel systems (more specifically, tuning them) to go over it all one thing at a time. A good bit of effort put in at this stage will be priceless down the track when your engine is running the best it can. My gut feeling is that getting the injector cleaned isnt going to help much. For your sake I hope Im completely wrong

. It it was worn you would see fuel leaking out of it when the fuel pressure is up.

Deep breath mate, nearly done. Its in and its running. After some tweaking you will have a goer.

As far as the box between the maf and the ecu goes, Im happy to build it for you, but in order to do so Il need to get you on the phone taking some measurements for me as I only have a flapper AFM, not a hotwire.

Regards

Doug

Tweety · Post by **Tweety** » Wed Sep 04, 2013 2:14 pm

Ok. Up till now the engine wouldnt hold idle and would stall. Power about 50% oooomph about 50%, economy very very good.

Took it to Cory, injection knowledgable person for the basics. Injector clean, TB clean, fuel flow check, smoke machine hook up etc etc etc. Timing adjust via the ECU.

At the end of this cory had reservations on the Air flow meter.

Raod test and a definite improvement but still down on power. still wont go over 105kph, slow acceleration, smooth engine and it now idles fine.

Returned to the workshop and my assessment of its driving confirmed in his eyes the AFM is faulty. He said he had hooked up the computer to it and when revving the engine the AFM wouldnt react quickly and showed only 5 volts. (forgive me guys I am trying to remember what he said and terminologies that elude this mind of the 60's when computers were a mere fantasy). So he suggested getting a new AFM. he said it will make a HUGE difference.

So hunting the net now. Before I order one any other suggestions? Thanks Doug for your offer but prefer to remain stock at this stage.

$165US + postage

http://www.thepartmonster.com/ShopByVeh ... on&mode=PA $165 US

Post by **Bantum** » Wed Sep 04, 2013 5:27 pm

I've been following this thread for a while now, trying to get my head around the EFI system, as I may be looking to do something similar.

Query where does the AFM mentioned go ? as I can't quite see / make it out in any of your previous images ...

Cheers, Bantum ...

Tweety · Post by **Tweety** » Wed Sep 04, 2013 6:56 pm

Yeh Bantum, it is between the top of the Throttle body and the air filter assy. it is an alloy cylindrical unit with in this case 3 or so wores from it. It apparently adjusts air flow form the ECU depending on fuel/throttle. so if it isnt opening enough you get less throttle....I think

steptoe · Post by **steptoe** » Wed Sep 04, 2013 7:31 pm

Wonder if your injection tech guy can rig up a thumb adjustable signal so you can try dial in a better voltage at 100kph and see if it suddenly improves?

It is possibly looking for a signal between 0 or 1 and 5 Volts. Be nice to monitor it and see what you are getting as you drive in its current state, like me and my knock sensor monitor it is a voltage readout.

Only three wires on your EA82 spfi MAF ?

Tweety · Post by **Tweety** » Wed Sep 04, 2013 7:54 pm

I think I'll invest in a new MAF meter. Everything points to it. apart form half throttle it runs great, must be economical- havent travelled 120kms without the fuel needle moving for quite some time. with the SC it would be at half way.

the guy did clean the MAF and his comment was that if operating well it should open quickly when on quick throttle and it doesnt. I am reluctant to take it to him again due to the cost. rather buy another MAF.

Subydoug · Post by **Subydoug** » Wed Sep 04, 2013 8:24 pm

Thats great news tweety! Sounds like the fella knew what he was talking about. Shame about the MAF but that isnt the end of the world. If you cannot find an SPFI MAF sensor It shouldnt be too hard to adapt the MPFI one to do the same job.

Regards

Doug

Post by **Bantum** » Wed Sep 04, 2013 8:49 pm

Is this it ?

Tweety · Post by **Tweety** » Wed Sep 04, 2013 9:07 pm

yeh thats it.

A mate of mine and fellow triker (mechanic) told me he has the contact for a guy in Melbourne that will fix the one I have. better option than getting a new one IMO.

Post by **Bantum** » Wed Sep 04, 2013 9:40 pm

Just for curiosity sake & when you get a chance, should take it apart & take a pic for us ...

P.S. - We might be able to see what's wrong with it too ... !

Cheers, Bantum ...

Tweety · Post by **Tweety** » Wed Sep 04, 2013 9:50 pm

confusis say no take thing apart that might not go back together grasshopper....spring go doooing!, etc. but if I take it to get it repaired an opportunity then.

Post by **Bantum** » Wed Sep 04, 2013 9:55 pm

ha - I've done that before ...

We might have find a drawing of it in the mean time ...

Found a pic of it in place ...

Ciao, Bantum ...

Post by **TOONGA** » Wed Sep 04, 2013 10:00 pm

http://www.ebay.com/itm/86-94-SUBARU-MA ... 96&vxp=mtr

thats the part you need 30 dollars + 41.95 postage. (US) second had

what is the part number on yours, does it end in AFH38-01 or AFH36-01?

TOONGA

Post by **Bantum** » Wed Sep 04, 2013 10:21 pm

Found this:

Does it correspond to what you have ?

Cheers, Bantum ...

Post by **Bantum** » Thu Sep 05, 2013 12:11 am

Found this interesting site : http://leoneturbo.com

& more info on the SPFI : http://www.leoneturbo.com/docs/EA81_SPI_guide.pdf

Cheers, Bantum ...

Tweety · Post by **Tweety** » Thu Sep 05, 2013 1:03 am

as Clint Eastwood says- man got to know his limitations....

Bantum those pics are from me....the purple thing in the background is our kayak. lol thats also my left hand with the SPFI manifold on my spare engine lol. The PDF file is what I used to do the conversion....

I'll look at that Toonga.

Tweety · Post by **Tweety** » Thu Sep 05, 2013 1:20 am

38-01. same. just purchased it. thanks Jules. should be here within a week