tweety

jono's mention of difference in MPG is important in reference to Subaru Nut's comments because MPG would be much different than the 22 mpg suggested. Could be 25 mpg or so Its horses for courses but if you have to lower your speed 5kph from 110 to 105 for comfort I'd go the auto any day. my 2 cents

The SC12 supercharger in a suck thru system (fuel and air) wasnt so successful IMO. Yes it made 100+ hp on the dyno at the fly but it was so difficult to tune at all revs. I wasnt prepared for the 14mpg. In the end it didnt satisfy my thirst for economy and reliability. Things change and now in retirement my thirst has changed to basic carb and a fully redone engine. it just might outlast me. Then I'll get buried with it....

corrected. retard the timing until the ping goes away.

agree with the above. I found it is the best way to tune your engine. go uphill with a tall gear laboring the engine. keep retarding until the ping goes away. If you change fuel type then you'll need to do it again most likely. When I installed my eA81 with adapter plate I inadvertantly had no timing marks as the flywheel wasnt used. hence this method was used to satisfaction.

I'm guessing but if the manifold is about 6mm larger in internal and external diameter, the 38/38 larger than commonly used with heaps more air intake, that the porting to enlarge the entry at that point prior to combustion would be essential ?????? Exhaust is a short length each side with one large muffler and a joining pipe. No smog stuff

There is a lot of history with this trike that I thought irrelevant. So I'll fill you guys in. From VW 1916 went to eA81 32/36. The VW auto is a standard piece as is the diff. The only thing that could be suspect is the torque converter. Either way the diff, auto and torque converter are all going to be checked and repaired if necessary. I've gone down the SPFI route. Being in Oz if isnt easy replacing sensors etc when you really are guessing what the problems can be. Besides, I'm of the older gen and desire carbie now. Good to realise that more compression will give it more low down torque. Exactly what I want. I think the engine can be used without the swirly item until its output proves a problem to be improved.

got it. http://www.hicloneqld.com/products.html seems an easy solution using in my case a eFI type as have a snorkel air filter cheers

Most readers would recognise Tweety. Biting the bullet very shortly. Engine is out and as usual for me I have some radical plans. Radical plans can call for some advice and opinions though. My Subaru powered trike has a VW automatic. In the past I've had a weber 32/36 and it was sluggish off the line. Hence the purchase of a synchronic carbie. The desire is low down torque not a revving engine due to the auto and its restrictions. My desire is to use the EA82 SPFI manifold (I have one) with a custom made adapter for the 38/38. No problems there. I am thinking along the lines of- 1/ rebore 20 thou oversize EA81 pistons. 2/ 20-30 thou shaved heads 3/ Cam grind 16/56 as recommended by a friend 4/ heads ported 5/ has electronic dizzy in good condition and high output coil/leads Seeking 9:0 or more compression. Have done a search and read that the SPFI manifold should be modified so the fuel/air mix swirls. how can this be done and is it really necessary.? I am aiming at a really fresh engine. Trike weighs 640 kgms. Getting ideas from all over.

purchased. thanks Toonga

Thanks Roadtoad. 'Tweety' has won several awards. It started as a Vw trike Australian built. I designed the roof and has it custom built. Has a Mazda electric sunroof. VW auto trans. Chucked the 1916cc VW engine away and planted the EA81 in there. Many said the EJ would eb better and I'm sure there were many advantages but in the end I went for simply to work on EA. I did have a SC12 supercharger on it but it was too uneconomical. Recnetly took off the SPFI and have gone 38/38 weber carb. Some more pics.

These engines are getting older. I am going to recondition the entire engine. Do I rely on a 25 year old oil pump. I have 2.? Or do I find a new one? Your thoughts please.

thanks Gloyale. have taken off the sPFI system and going to put on a 38/38 weber with the SPFI manifold. back to basics.

in 1. the small hose is off the manifold I think. hence you cover it you stop vacuum leak. Think you connect that hose to it and it goes under the carbie base.

I've had the 32/36 on my EA81. Now going to a 38/38 and need to route the ventilation. The passenger side (US) should get clean filtered air that is drawn into the engine. You can get one of those small filters or tap into the air filter box for this but it should not be connected to any other part of the ventilation system. The drivers side goes to the PCV but along that hose if a fitting you describe. This fitting should have a smaller hose off it and ideally this hose should go to the intake near the carbie's throat. It allows for excess fumes that the PCV cannot cope with in short bursts and is smaller for a reason so fumes favor the PCV. Thats my understanding of the system.

try "Frog" at Griffith Subaru 0421253610. I have a SPFI system (EA82) for sale minus manifold by the way.

this is a good topic for those like me that havent ever replaced a oil pan gasket. In Oz we have Nitrile rubber readily available. its 3mm thick. but expensive. worth it if you never need to replace a gasket again but I dont know if its the type of rubber you are talking about. Could also use it for the VW auto trans gasket also I reckon?

thanks Josh. I will keep upates as they happen but not for a while. The EA81 is out and the VW auto and axle assembly is coming out also for some work. that will obviously be the first thing on the list. Then specs of the trike to my cam builder. possible ej20 pistons etc. the 38/38 has been purchased. if mpg is woeful I'll just put a 32/36 on it, no drama. Be interesting. thanks for your views. good to hear difference in opinions and they are taken on board.

arhhh but wait rdweninger.....what if the part number was correct and the part sent was incorrect? Take my case. the MAF part number on the EA82 MAF is clear on the electronic part, the sensor black unit. The housing was larger, not by much. On the very very rare occasion part numbers,( in this case by Hitachi originally) were the same. however as the MAF was meant for a Nissan it was housed in a larger housing. I tried the unit in my vehicle without success. The internal were not the same. In my case Rockauto amy well ahve made a error we could all make. Pick up a part and it has a certain part number and its thrown in the Subaru bin instead of Nissan bin. That's ok, thats human error. its the poor service following that which is deplorable. Rockauto lacks honor and fairness. I'd never deal with them on principle.

I would not recommend Rockauto. They sent me the wrong part, an MAF. I didnt realise this until my original MAF was returned a while later from an electronics company. Wanted to return it to Rockauto and they refused. Even though they sent me a MAF for a Nissan. Expensive door stop. Tony

My experience with MAF's resulted in - get the same one mentality. And stay away from Rockauto. They advertised a MAF for a EA82. Paid half a house for it. Arrived in Australia while my bad MAF was being looked at elsewhere. By the time the old one returned I than realised Rockauto's was the wrong type with a slightly larger housing and mesh end. The one month return policy came and went and Rockauto wouldnt refund even though the part was not Subaru replacement likely Nissan. I tried installing it- would not run. Paperweight now.

thanks guys. I am going 38/38. Reason being the auto trans makes take off mundane. I think I need that low down extra torque the 38/38 gives. also the spfi manifold will give better breathing. The engine will eventually be replaced with an engine with a mild cam and shaved heads. This being the case the 38 is suited. Yes you have to split the block. Better for me to buy another engine and build it up at my leisure then drop it in. The 38 I'm told can have smaller jets for more economy still providing good performance off the mark, say 120's instead of 145 mains. Jono there is a few pics on this site that clearly shows a spfi manifold and Holley 5200 mating up. 5200 same as weber 32/36. the holes you speak of can have the center of the adapter cut out between the holes. This pic shows the wedge adapter too.

So the spfi on my ea81 has come to an end. Lets move on. I did once have a weber 32/36 on my engine of my auto trike. It was ok but with the automatic transmission it was somewhat sluggish. Low down torque and power is my quest. I am seriously considering a 38/38. I am going to retain the larger SPFI manifold some 6mm extra diameter (I think) and can open up the adapter plate a little also. I have a good flow through exhaust and may shave the heads at a later date. So, given the better airflow over the ea81 and the sluggish VW auto box would I be better off going the 38? I dont really want to drop too much in mileage.

A capacitor .47 microfarad rated at 250 volts I've been told is suppose to be there to stop voltage spikes? Maybe my conversion wasnt complete etc.

My question is- there is a transister mounted on the coil mounting bracket. There is also a condenser nearby. There is a black and white wire from +ve side of the coil to a two pin plug see pic and the second wire a black one goes to ground. As you can see from the picture there is nothing plugged into this plug. I assume it is a plug in condenser. Can someone enlighten me about it, what effect it will have on the ECU if missing? I beleive it has more importance for the operation of the ECU than noise suppression in a radio. Also what specifications has it? As I'll try to hunt a similar condenser in Oz. Finally I do have a spare coil mount with transister and a different style of condenser plug on it. A black cylindrical type. think it might be from a later model. but I dont have the other plug part that goes to ground. Hope I can get some answers and pics to please.

Hi, With my ea81- I've taken the long way round from weber 32/36 to supercharged SC12, to SPFI. Now for various reasons am considering going back to 32/36 weber for simplicity. I'm having some difficulties with the SPFI and am merely considering my options. I would imagine the SPFI manifold is larger and therefore more desirable to retain with the carbie. - Would I need to fabricate my own adapter? - how big an advantage would the larger manifold be? - as the manifold is larger is there a larger carbie more suited to this manifold that I could use. or perhaps the 32/36 with slightly larger jets? As many know here on this forum I own a trike with a 3 speed VW automatic transmission. regards Tony