| [ Total Views: 16124 | Total Replies: 69 | Thread Id: 97043 ] |
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 tweety
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| posted on May 22nd, 2012 at 06:05 PM |
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Subaru ea81 SC12 supercharger in trike
Was so impressed with our member Joel and his SC12 Toyota supercharger thread that I have bitten the bullet and purchased a sC12. A dellorto 40mm
side draught carbie (same as Joels) has also been purchased and the seller sold me a second one for $60 as well for spares.
The build might be a little slow at the moment (minus 3 here at night in the victorian hills) so bare with me and any advice or comments wlecome.
Received my SC12 Toyota supercharger today in the mail.
Impressed. It appears internally to be very sound. No slop at all in the bearings. fair bit of dust on the rotors so am wondering what to clean
them with as dont want to take any teflon off. ???
and the end casing was clean ready for some new oil. 2x (100ml) Holden supercharger oil will be ample.
Dellorto carbie will be here soon.
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Joel
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| posted on May 23rd, 2012 at 07:26 AM |
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All I did to clean out mine was spin it with the electric drill and spray carby cleaner in the intake side and let it blow any crap out the otherside.
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ian.mezz
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| posted on May 23rd, 2012 at 12:16 PM |
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I not sure if you been following Joel
post,
but he learnt by his mistakes  and opted for a newer more
reliable & more powerful Subaru motor and I think the old stuff is still sitting around in his shed:
having said that, I could be wrong
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tweety
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| posted on May 23rd, 2012 at 06:25 PM |
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There are positives in the ea81 believe it or not. There are some that just simply like OHV engines and not timing belts, shims, EMU's and
kilometres or wiring and engineering worries in a trike.
Yes, I am a little tired of the EJ thing.
If you think it is a mistake Ian.mezz then thats your call. Means there shouldnt be a ea81 on the road. They should all have eJ's. I actually love
my ea81. And I like being different which feeds my quirkiness. Been down the path of DOHC's, timing belts, twin carbs and so on. But I'm of middle
age and things change, desires change.
Joel- a supercharged electric drill eh.
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Bone
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| posted on May 23rd, 2012 at 07:00 PM |
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Ea81's are a early, simple, great engine. I will be going ej22 in the near future in baja but I will never bag anyone with a Ea81 because it has been
super reliable for me. IMO a stock ea81 is better than a stock type2 stock 1800cc.
Generally people people that rubbish subi conversions Just Cant Do It themselves so stay air cooled.
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ian.mezz
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| posted on May 23rd, 2012 at 07:27 PM |
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good luck with what your doing .after all its your hobby/
trike.
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tweety
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| posted on May 23rd, 2012 at 09:05 PM |
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yeh thanks Ian.Mezz.
Not that I need to explain but I will anyway.
I owned Lotus's when in my 20's. DOHC's, twin webers, timing chains etc. that was too complicated for me and removing cams to replace valve shims
among other issues. Then there were more cars owned that I found difficulty in repairing myself. Many embarrassing moments taking boxes of engines to
mechanics. I know my limits now.
Now I live in remote strathbogie Victoria and getting emchanical help is not possible- have to rely on your knowledge. I also wanted to maintain the
engine myself totally apart form any rebuild.
My previous engine was a 1916 VW. I wanted to replace it and I had many choices with the sherman adapters. Including EJ. But I knew I'd be capable
of maintaining the ea but not the EJ. The EJ needs engine mounts and on the Panther monocque chassis this is an issue.
I run a small business so maintaining two other vehicles by dealers was enough. I'm also in a time warp with my preference to the older engines.
This will happen to you guys. you'll stick with eJ instead of some new hybrid system a younger guy recommends to you that becomes common.
Finally I traded in my camper trailer (240kgms) for a Guppy caravan. Weight 500kgms loaded. The ea81 tows it ok but would like a bit more torque for
the hills. And I'm quirky.
I dynoes the ea81 to find 75 hp at the fly. sadly 60hp at the wheels, my only error was that the auto zaps a little too much out of it. the Sc will
fix that.
Hence my choice of ea81. Offence not taken. Passing thru Central Vic and I'll give you the handlebars....
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tweety
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| posted on May 26th, 2012 at 09:54 PM |
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Today got hold of some alloy plate and tube. made up my first anifold the one that exits the SC. Have to get it welded up by someone that knows
how...
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tweety
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| posted on May 27th, 2012 at 02:20 PM |
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Amazing what you find in a shed when you're looking.
This had to come off my ea81 when I stripped the external stuff off it.
And the bearing is in good nick. Likely it came from a past A/C belt system. I'll get my engineer to turn it so it can rest against the back flat of
the V-belt.
Make a good idler pulley for the supercharger. I'll hinge it and make a slot adjuster bar.
What I'm planning now is have a good look at pulley sizes I have on the crank when I get my trike back from the engineer this week and settle on a
pulley size for the SC. then take it to a pulley joint to find out if I can get a pulley fitted that can be interchangable. Dont want complications
alter down the track because I'm reaching 10-12 psi and not the desired 5-6 psi
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tweety
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| posted on May 28th, 2012 at 09:06 PM |
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Not happy with the alloy manifold. reject!
Too thin and soft metal.
Found some steel pipe and 3mm steel. tomorrow will be attacking it.
This is the Datsun 1600-2L intake manifold I have purchased on ebay.
I'll cut off one half to use my delorto carbie on the SC. and have one half left over. Note how the tubes go towards each other to get up close
which I need so it is directd into the square gap intake of the SC12.
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Smiley
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| posted on May 28th, 2012 at 10:17 PM |
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You're setting a cracking pace on this.
I'll be watching this space to see what you come up with. You have been very innovative with your trike so far.
Smiley 
If you said I was a Volkswagen man, you'd be right.
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tweety
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| posted on May 29th, 2012 at 06:20 PM |
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Thanks Smliey.
Busy day today on the project. Cut some slots to make the opening more sqaure like for the exit of the SC. and my Dellorto carb + a spare carb came in
the mail today.
 Then after cutting out the 3mm steel plate I tack welded
the pipe to it. I'll get my engineer to weld it fully.   and can anyone tell me what this hole is for and what I do
with it?  and in this pic there is the throttle on the left. I
assume the level on the right hand side of the picture is the choke???
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tweety
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| posted on May 30th, 2012 at 08:18 PM |
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Third time lucky or was it fourth try? to make a manifold?
Anyway got it this time.
the 4mm gal pipe was too heavy. 1.6mm steel pipe from where I got my exhausts done. Tested my welding as it was easy to blow holes through it. but
got there in the end.
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tweety
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| posted on June 1st, 2012 at 10:12 PM |
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Got the manifold and cut it in two.
Didnt count on it having a designed bend in it. either I lean the Sc over a little or make the 5mm-10mm adapter plate from the manifold to the sc on
an angle. Think the former will be easier.
Now I'll start making templates for the plates.
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tweety
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| posted on June 6th, 2012 at 07:54 PM |
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Wish I hadnt move my photos to another album in photobucket!!
Today was interesting.
Most SC12's and sC14's come with a clutched pulley. add 12 volts to the two leads and you have lock on. But they can slip and besides you cannot
use a clutch pulley on a draw through set up. After all, fuel and air mix cant get through the vanes in the sC if the lobes arent turning. Different
with a blow through because those systems have a bypass when you turn off the clutched pulley.
I had planned to use a v-belt set up. Thats because I have a triple v-belt crank pulley already on the engine. But my engineer rang today to tell me
it would be quite difficult to fit a fixed v-pulley in lieu of the clutched 5 ribbed one on the SC. But quite easy to fix the clutched pulley solid.
So be it. means a 5 ribbed belt is going to be fitted. so off to the wreckers where I found 1/ a 5 ribbed 135mm pulley for the crank and 2/ a ribbed
tensioner pulley and a flat pulley interchangeable. Which do I use- flat or ribbed tensioner?
The flat pulley runs on the back of the ribbed belt and tensions up to make more footprint on the belt around the crank and SC pulleys. It also makes
the belt bend opposite to how it travels around the other pulleys possibly causing more wear.. The ribbed pulley tugs at the belt = less belt on the
pulleys. but it allows the belt to onlt bend the one way.???? ideas/opinions?
Found a 5 ribbed pulley for the crank. I have a standard single crank pulley. My engineer is welding/fixing the ribbed pulley to this. But it is
135mm diameter. The Sc pulley is 115mm. meaning not 1 to 1, the figure I sought. this means more boost than anticipated. maybe 8psi.
vrooooom!!!
Might start the install next week. But we are going on a 3 day holiday soon so a bit of a delay.
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aintgotitmusthaveit
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| posted on June 7th, 2012 at 02:04 PM |
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How did you get your supercharger so shiny?
I'm just finishing my 2nd instal of an sc12
Will post pics soon
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tweety
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| posted on June 7th, 2012 at 02:57 PM |
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aintgotitmusthavit
I used a steel brush in a drill. then alloy engine paint. looks more perfect than what it is haha baking soda and a little water helped a lot.
yeh pics please.
My SC12 is at the engineers. am eager to get it back to locate its mounting position. whether I can mount it on the same pivot point as the
alternator (cast iron strong mount there) or have to move it over to above the left hand head past the dizzy which may look lop sided and as there are
no engine mounts balance might be an issue. all depends on the intake manifold I'm yet to make but I think the sC will be high enough above the
intake to get clearance.
pics are good.
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tweety
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| posted on June 7th, 2012 at 06:11 PM |
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Almost completed the adapter plate from carbie manifold to supercharger inlet.
Blow off valve in position. had to get a collar lathed up in steel to get it braised onto the steel tube.
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tweety
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| posted on June 8th, 2012 at 09:50 PM |
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I have a concern with adequte fuel supply to the carbie. I run a electric fuel pump that gives 3-5 psi. There is no return feed to the fuel tank.
Hence this has worked well as it has low pressure.
If I find a pump with higher pressure I'm afraid it will cause other issues like overflow. This unit below might be an answer?????
Mallory Fuel Pressure Regulator
This mallory fuel pressure regulator is our most popular regulator
for several reasons. Its good price, readily available, and can be
used in a wide variety of applications! It also it has a 1-1 boost reference
for turbo charged, or supercharged applications to prevent fuel starvation
common with a static (non rising) fuel pressure regulator. This regulator
is designed for carbureted fuel systems and is adjustable from 4 psi to 40 psi
fuel pressure, and with the boost reference line hooked up the fuel pressure
will raise 1 pound (fuel pressure) for every pound of boost to prevent fuel
starvation by keeping the correct pressure in the carburetor at all times.
Price $95.00
what do you think guys? will the standard pump suffice???
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tweety
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| posted on June 9th, 2012 at 10:08 AM |
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Got advice on this fuel regulator and seems I dont need one.
I'm close to the instal now. My engineer is welding the pulleys together, fixing the clutch pulley solid and I've mounted the tensioner pulley in
place.
The SC will be mounted between the alternator and the intake on about 20 degree angle as to allow for the bend in the Datsun manifold to allow for the
dellorto to be level. It might even use the same pivot point as the Alternator.
I'm hoping the manifold form the sc to the intake will be as short as possible.
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tweety
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| posted on June 13th, 2012 at 07:49 PM |
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All advice I have received tells me I dont need a fuel regulating valve witha draw through set up.
Dropped off my Dell'orto carbie today in Shepparton to a carbie joint. They are to rpelace the jets, and there are several, with ones suitable for
the project.
Get the SC with its pulley fixed and a welded up crank pulley hoping tomorrow.
Sort brass fitting for the 3 vacuum points, PCV, auto kickdown and dizzy.
Got 5 days off next week. might be making up the last of the Sc mount and manifolds.
Interesting at the carbie cente the owner has a green Gemini with a Holden 3.8 V6 in it and 3...3...superchargers. two sC14's one on each bank ans
an eaton in the V (centre). hope to get a pic soon.
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tweety
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| posted on June 16th, 2012 at 10:40 PM |
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Here is a Gemini I saw this week. Three superchargers. 1x eaton in the centre, and two Toyota SC14's one on each side. the SC14 is the big brother of
the SC I am isntalling the SC12. In a lightweight car.  Yesteday I got the sC and pulleys back from my engineer. Today I made a mount that sits between the alternator and the intake  (ignor the bird crap welding.) here it is in place  Tomorrow a big job, the manifold form the sc to the intake.
It will only be 240mm long but it will be like a plumbing job.
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pete wood
A.k.a.: figure itout
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| posted on June 18th, 2012 at 03:58 PM |
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interesting gemini, is that a buick V6 hiding under there?
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tweety
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| posted on June 18th, 2012 at 04:33 PM |
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Holden.
14 sec's quarter mile when it wasnt running 100%. and the sound is something else Pete.
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tweety
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| posted on June 18th, 2012 at 09:07 PM |
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Took my manifold to my engineer. He was in two minds to oxy the unit to ensure the leaks in my bird dropping wleds were sealed. But he did supply me
with DEVRON, the original plastic steel epoxy.
Mixed up the dark grey putty with hardener. This material is not much different to body filler to use.
What a difference. Use water on a spatular or use your finger( as long as you wash it off with hot soapy water). Am yet to decide to put another
coat on it. Coats should be 1.6mm thick minimum. So I cant see the point because this stuff is so tough.
Specs on DEVRON:
this side bolts onto the supercharger
gotta pick up a bit for the electric drill, wire brush tool to get the imperfections off inside. Or is there an easier way?
Then paint and final asembly. I also purchased a hard plastic box from Middy's today to make a narrow unit at the carbie entrance. this will be
modified to allow for the 75mm extendable filter hose. I need a narrow unit as the carbie is fairly close to the roof frame when the roof is
retracted. pics when its done.
Close to start up.
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tweety
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| posted on June 19th, 2012 at 11:29 AM |
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Must admit, pretty proud of myself with this sculpture haha
It came up great with the use of Devron.
And the inside was also done making it really smooth for the fuel/air mix
This is with the blow off valve.
While it dries I'm onto the air box to connect the air filter.
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tweety
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| posted on June 20th, 2012 at 10:02 PM |
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I ordered it last Monday. Will be at Bursons Shepp. pick up tomorrow. The Corolla belt that broke was old off a wreckers shelf.
But the ensioner also needed a washer so that friction didnt help
video tomorrow.
and yes, it sounded better than Elvis.
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tweety
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| posted on June 21st, 2012 at 08:57 PM |
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Well I'm real happy now. Purchased a new Corolla 5 ribbed belt and fitted it. I thought the old belt broke due to it being used. But it was because
the tensioner mount had a burr on it and it cut through it thereby shreading it. So with half a new belt hanging on I took this short video. As
you'll see I needed to work the choke to get it start and it was real cold so looks like smoke out the exhausts. anyway I'm soon at the end of the
project.
the sound at the beginning is heavy rain on the roof.
Special thanks to our member Joel. His PM's were informative and much needed during the project. thanks mate. ps...I owe you a Tweety ride!!
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tweety
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| posted on June 23rd, 2012 at 04:51 AM |
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I do have a problem I have to work on.
Being hard mounted if the SC alignment is out then it doesnt give me any room to adjust it so I dont damage belts.
I can cut the manifold in two and use a silicone sleeve there this would mean I need a top sc mount to secure it as the manifold is currently holding
it firm in position
Couple of days and it will all be done. Testosterone doesnt have patience!
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tweety
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| posted on June 25th, 2012 at 03:04 PM |
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So finally the manifold was modified. Got the engine up to operating temperature but still the engine wants to bog down with richness. I have a spare
carbie so I’ll look at those main jets soon.
But first there is the test drive. I inched down the driveway careful not to flood it. Then stalled it. Restart ok will feather the throttle till I
get some speed up. Carried out a u-turn at the Strathbogie CBD….and put the auto in first gear from drive. Feather the throttle till 2000 rpm then
squeezed it more….woooooohhh!!!!!! wow!. Where’s that neckbrace!! Climbed a hill leaving bogie and slowed then it kicked down from 3rd to
second and immediately for the very first time, the front wheel on tweety left the ground about 20mm. What amazed me was- it remained off the ground
for about 5 metres. That’s what it felt like but likely 2 metres- dont matter it was a buzz. It has never been so responsive. I was going uphill but
this is exactly what I was after. And that kick in the back is gradual and consistent till about 4000 rpm when it increases noticeably. And the
noise? I don’t hardly hear it! Maybe the car guys hear it due to it being enclosed?
Gotta do the airbox now, clean up the garage, change the jets and get a tune. What a relief!.
The belt is now running true. The silicone tube idea failed due to no having enough "meat" on both ends of where I cut it. So wleded it again
while in place and hard mounted the unit again.
This is an electricians wire box. will modifying it to make an airbox out of it. It has to enable a 75mm hose for the cone air filter. and a 38mm
hose for the blow off valve.
I will connect the digital boost guage to seek the amount of boost I have. Video will come.
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