Supercharger for Subaru?

Tweety · Post by **Tweety** » Thu May 31, 2012 11:36 pm

yep got a real one. the other cheaper ones are crap.

used it a fair bit on the Sc with baking soda. worked ok. then alloy engine paint.

Tweety · Post by **Tweety** » Fri Jun 01, 2012 10:14 pm

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.

purp · Post by **purp** » Sat Jun 02, 2012 9:11 am

When I think of that hanging off your trike I giggle a little.

Brumby Kid · Post by **Brumby Kid** » Sat Jun 02, 2012 2:09 pm

purp wrote:When I think of that hanging off your trike I giggle a little.

Same.
Then I think what it would look like poking out the bonnet in the brumby or even the STi. Then I giggle lots.

Cam

Tweety · Post by **Tweety** » Sun Jun 03, 2012 8:07 pm

Some imagination?

Those two red trumpets poking out the side quarter panel on your Brumby would create some interest lol

Brumby Kid · Post by **Brumby Kid** » Sun Jun 03, 2012 9:25 pm

Tweety wrote:Some imagination?

Those two red trumpets poking out the side quarter panel on your Brumby would create some interest lol

Yeah, still dont think the cops would notice....

Well not when they hear/ see what i have in mind for my exhaust. Mwahahahaha.

Tweety · Post by **Tweety** » Wed Jun 06, 2012 7:33 pm

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 cant 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 they 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 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 a ribbed tensioner pulley and a flat pulley interchangeable plus sliding mount. Which do I use?

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. The ribbed pulley tugs at the belt = less belt on the pulleys.???? ideas/opinions?

Found a 5 ribbed pulley for the crank. Bennie (bless his cotton socks) supplied me with a standard single crank pulley. My negineer is welding 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.

steptoe · Post by **steptoe** » Wed Jun 06, 2012 9:29 pm

Saw one of these silver frosted SC's today in a "last of the rear wheel drive" Geminis hanging out LHS of bonnet, then under bonnet was a Holden V6!

Tweety · Post by **Tweety** » Wed Jun 06, 2012 10:19 pm

Steptoe they are quite popular.

But the Holden V6 surely is too big for a sC12 or even a SC14.

I bought mine off a guy that tried it on his V6 and it didnt do anything! He needed a sC much bigger.

Escorts used to have V6 capri engines shoehorned into them, series one toranas with V8's (and with that bloody light rear end it was then a danger to all),

now the SC's are the choice. early mini owners are using the SC12 or sprintex. in fact the sprintex is being used in a Harley model now and is a twin screw design...pressure caused internally not externally like a roots charger.

cheapest bang for buck. even if owners like me have to go to an engineer to get things wleded correctly hahahaha. I dont trust my welds on things that could fly off!!!

But a V6 in an old gemini blown....wicked...and not so safe I reckon

Tweety · Post by **Tweety** » Thu Jun 07, 2012 6:03 pm

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.

Cam · Post by **Cam** » Thu Jun 07, 2012 8:36 pm

Plumb back I hope?

Haven't been on here for a while, nothing like a charger to get my interest though. Have you thought about the heat these sc units create? The rotors are in contact with the outer housing, they are teflon coated for this reason, it makes for very high efficiency at low rotor speed but if they run for too long they get very hot and can damage the teflon. The original setup on the toyotas was enough vacuum, (read lots of throttle) and it would turn the supercharger on, limiting the time used?
Cant remember all the details about them, was 90% complete putting an sc14 on an ej20 but couldn't get a new clutch as mine was stuffed...

stenno · Post by **stenno** » Thu Jun 07, 2012 8:58 pm

Cam wrote:Plumb back I hope?

straight into the exhaust for the extra afterburner effect

Otherwise, progress is looking tops

Tweety · Post by **Tweety** » Thu Jun 07, 2012 9:14 pm

Hi Cam

Yes plumb back into the air filter.

I'm only seeking 5-7 maybe 8 psi and the revs will be 20 higher than the engine so the SC12 will be spinning at a fraction of what the unit would do in the Toyota.

The VW thread in the early stage of this thread is worth reading. I'm having a draw through set up almost a mirror image of that instal.

http://forums.aussieveedubbers.com/view ... ?tid=65678

Means I cant use a clutched pulley, must be fixed. Means I dont need to pressurise my carbie. Means fuel will go through the blower. Cant use an intercooler. There wont be any under bonnet heat build up of course. Joel the beetle owner told me that its a great set up. At idle and low revs the blower is turning but doesnt boost until you plant your foot a bit. So it wont necessarily be "working" hard all the time. Ideal for towing which I am doing a lot of.

My cooling system is new. Alfa radiator, motorcycle radiator behind side body vent that's hooked up to the heater hoses, new water pump, 82 degree high flow thermostat. Twin 12 inch fans. System works very well. With the low revs my SC will be doing I cant see a problem but accepy your concerns.

Gemini owners, Datsun 1200, minis and others are installing these units by draw through.

The SC will o doubt get hot Cam. I havent read that it is an issue.

Tweety · Post by **Tweety** » Fri Jun 08, 2012 9:47 pm

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 (edited- not needed with draw through)

what do you think guys?

Tweety · Post by **Tweety** » Wed Jun 13, 2012 7:41 pm

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.

purp · Post by **purp** » Wed Jun 13, 2012 9:41 pm

Tweety wrote:
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.

Can never have two many supercharges...

Tweety · Post by **Tweety** » Sat Jun 16, 2012 10:32 pm

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.

steptoe · Post by **steptoe** » Sun Jun 17, 2012 8:53 am

Funny, the SC Gem I saw was also green. The single SC has to come off for engineering requirements. Three superchargers ! Gets a bit of symmetry under the bonnet - bit hard to go one up from that

Tweety · Post by **Tweety** » Sun Jun 17, 2012 9:13 am

He did 14 seconds quarter mile and the donk hadnt been sorted, was running crap.

Apparently it has one hell of a sound.

Tweety · Post by **Tweety** » Sun Jun 17, 2012 8:01 pm

Today like yesterday was a big day, 16 hours and I'm stuffed.

The manifold from the sc to the intake was a nightmare. Two 75mm steel tubes on different angles and I decided to weld them together rather than use any silicone hose.

I battled on arc welding the tubes that were only 2mm thick. Adn my arc welder has been fixed on 2.5mm rods for 10 years now. Lotta heat!!

So if anyone is reading that knows how to cover up bird droppings posing as weld let me know. Body filler"

I'm happy enough with it if it doesnt leak.

About a day of work left to do to rev him up!