Supercharger for Subaru?

steptoe · Post by **steptoe** » Tue Jun 26, 2012 8:51 am

Thanks, thought Tweety missed my Q

Nothin' like a comment from somone with your sort of experience. Hot looking Subaru you have there in the Avatar !

Tweety · Post by **Tweety** » Tue Jun 26, 2012 9:47 am

Yep missed steptoe.

A ride is waiting for you. BYO sausages for the bbq...

YouTube · Post by **El_Freddo** » Tue Jun 26, 2012 1:02 pm

Silverbullet wrote:...cuts a hole in their bonnet to fit it

Although you could probably fit it down the side somewhere with a long belt like Subarino did, different engine though.

If you don't have AC or PS then you've got two options. If you've got both forget the SC fitting under the bonnet! Unless you get creative with some "drive shafts" to the rear of the engine to use that room under the spare tyre...

Joel wrote:It will handle this no worries, especially in a light weight trike.
I've seen them last for years mated to rover V8s and Commodore V6s

VW gearboxes are stronger than people give them credit for as long as you arent dumping the clutches at every set of lights or doing burn outs.

I believe it was your thread about the SC install that I read from somewhere linked in this thread. Impressive! Have you got that other engine built up yet or still running on the old clapper?

VW gearboxes are pretty strong from what I've heard. Dad rallied a MkIII fast back with a 13B rotary mated to it. From what I remember it went awesome, but it didn't last long before he got itchy feet and was going for the ultimate setup where he rotated the engine/gearbox for a mid mount setup. It ran like this for a bit but needed something done to it and now it's waiting to be put back together. It's only been about 20 years so far! That was back in our Territory days

Tweety, great to hear mate, I can't wait to catch up for those up close and personal in the flesh viewing (of the trike

) I wonder who'd beat who - Ruby Scoo with the "good" gearbox (still being sorted out) or Tweety

Maybe we need a drag session one friday night at Calder Park

Cheers

Bennie

Tweety · Post by **Tweety** » Tue Jun 26, 2012 7:36 pm

might buy a few jets. get it running sweeter and dyno.

this will go on tweety's arse.

steptoe · Post by **steptoe** » Tue Jun 26, 2012 8:16 pm

I can visualise a new Tweety sticker , giving the bird, "hey you - poody tat"

Joel · Post by **Joel** » Tue Jun 26, 2012 9:15 pm

El_Freddo wrote:I believe it was your thread about the SC install that I read from somewhere linked in this thread. Impressive! Have you got that other engine built up yet or still running on the old clapper?

Cheers, yes that would be me and I still have them all but sitting in the shed unusued for many years now.
Havent run a VW engine for over 3 years now,
the supercharged 1776cc VW engine got removed to fit an EJ22, then that got removed to fit an EJ25.
next that will probably be removed for an EE20......ha! I wish.

Tweety · Post by **Tweety** » Tue Jun 26, 2012 10:39 pm

Yeh Bennie,

joel has success then rips the engine out to try another...opposite to me.

Hey Joel how about a H6 in your beetle?

Joel · Post by **Joel** » Wed Jun 27, 2012 7:25 pm

What can I say, I get bored easy

My poor bug has had 7 different VW engines and 3 different Subaru engines in the 13 years I've owned it.

Dont laugh but I've seen EG33/EZ30 in a bug has been done but it's very tight as you can imagine.

Tweety · Post by **Tweety** » Thu Jun 28, 2012 3:49 pm

While waiting for my main jets, decided to hook up the boost guage.

The trike started immediately without choke- to my surprise. But needed choke to keep it going.

10psi !!!! oh boy.

rev it up and it sometimes drops to 9. I think this means that it might be say 9.6psi....dunno? Anyway having wanted 6-8psi for reliability reasons I'm much more happier than usual as long as it doesnt cost me an engine.

Went for a short ride this moring (after the engine warmed up to operating temp for 5 minutes, and it kept bogging down, stalling at anything a little over light throttle.

Got my jets now and am going to try them out. Note the airbox, that cut down electrical wire storage box has Hose to the filter..

Tweety · Post by **Tweety** » Thu Jun 28, 2012 6:09 pm

Well today I nearly finished the airbox. The top cap on an angle has to be recut to make it look more presentable. But for $24, it was cheap for what I wanted it to do.

The box has 75mm plumbing to the vacuum style air hose to the cone filter further towards the front to get all that cool air. Ther is also a join for the blow off valve.

Replaced the 145 jets with 135, then 130 then 125. Not much change with the bogging down of the engine. So with the 125's in place took to it with the timing light. Bearing in mind the standard ea81 has its timing marks on the flywheel at the rear and I dont have a flywheel anymore being an adapter and auto trans from VW.

So the triple crank pulley originally on this engine has a mark on it, and was found from riding uphill slowly until the pinging ceased. A friend had his Brumby/brat here once and we compared markes and by chance I'd timed it to 8 degrees with that mark in the vertical position on the block halves...odd eh..

When I replaced that pulley with a standard single V belt pulley I copied that mark over. Then my engineer fixed a 5 ribbed pulley to that. Well I checked the timing and it was about 20 degrees. Dont know why. But I loosened off the dizzy and the timing light decided to go bush!!.

With the info I had though I could retard the timing quite a lot. I kept doing this until it revved cleanly. Until I get another timing light I dont know what degrees it is at idle or high revs for that matter. But I'm fairly happy I got the hesitation out. But was I now running lean?. Seemed I was because at medium revs it seemed to run out of fuel as it slowly died down.

I replaced the 125's with 145's. Smelt quite rich. Replaced them for 135's and it was the happiest its been. That'll do till a tune.

Wanted a test ride but its dark.....lol.

YouTube · Post by **El_Freddo** » Sun Jul 01, 2012 9:34 pm

Won't the blow off valve create a super rich mixture that'll be dumped in the engine once you open the throttle again. This would only be as you come down in revs with engine braking or the like.

This is just my theory as my head sees it - I hope I'm wrong.

Love the supercharged badge as well, if they don't know what they're looking at on the engine I guess this will give it away!

Cheers

Bennie

Tweety · Post by **Tweety** » Sun Jul 01, 2012 10:40 pm

Bennie, Joel explained to me that the blow off valve doesnt get used in the traditional manner that a blow through system would use it. The vacuum nipple on the top of it isnt connected. In the blow thru the vacuum is connected and operates the valve.

Witht he draw through it valve basic operation is utilised only during backfire which occurs a few times to Joel on start ups. The valve is rather elaborate for its sole purpose and a much cheaper unit could have sufficed.

It also ahs a twist adjustment - that black top cylindrical knob. But with the 3 test rides it didnt allow pressure to escape back to the air filter.

So in a backfire it'll instantly release that pressure and thats all it does in a draw thru.

Yeh, I like the supercharger sticker and its has gone on the left hand side opposite tweety. Conservative size.

YouTube · Post by **El_Freddo** » Sun Jul 01, 2012 11:01 pm

Tweety wrote:Bennie, Joel explained to me that the blow off valve doesnt get used in the traditional manner that a blow through system would use it. The vacuum nipple on the top of it isnt connected. In the blow thru the vacuum is connected and operates the valve.

Ah yeah I forgot about that!

Cheers

Bennie

steptoe · Post by **steptoe** » Mon Jul 02, 2012 8:57 am

Tweety wrote: So in a backfire it'll instantly release that pressure and thats all it does in a draw thru.

.

That'd be a tame backfire on start up - nothin' like what I have had with draw through turbo and the LPG charge on the move - be no time for the blow off valve to do anything but - blow off with all the ducting and clamps

Tweety · Post by **Tweety** » Tue Jul 03, 2012 10:14 pm

Steptoe...this is now interesting.

See I had used red gasket goo on my gaskets and the fuel made them wrinkly. So much so they caused leaks.

So before I worked this fault out I had trouble starting the engine up. I advanced the timing about 20 degrees and the engine fired with heaps of choke.

Then came the monster of all backfires. The BOV had its hose tot he air filter off. So the huge amoutn of grey smoke came out of the BOV like a cannon...lol

It certainly worked a treat.

Today I repalced the gaskets and placed the timing back to 12 degrees and revved beaut.

steptoe · Post by **steptoe** » Tue Jul 03, 2012 10:27 pm

I might have to consider a backfire valve

Tweety · Post by **Tweety** » Wed Jul 04, 2012 10:31 pm

Anyone contemplating adding a SC to their engine might want to not only read this thread but also Joels thread.

but also there are a number of things I wouldnt do again.

1/ By far the mistake that cost me many hours was the one peice manifold joining the sc to the intake. Had my time again this would ahve been in two halves and made for a 1 inch section of silicone tube. This would have made mounting easier.

2/ Be aware that the entry and exit mounting bolts are 6mm and often can have worn threads. This might temp you to insert longer bolts for strength BUT....the holes go through to the spinning lobes meaning damaging them is easily done. I was lucky to realise this as I bolted a longer one up. In the end I retapped a few of them for larger stubbier bolts that did the trick.

3/ As a novice I didnt realise until later that the first thing to do is line up the pulleys both vertically and horizontally then secure the mount rather than thinking small amoutns of adjustment is easy.

4/ When purchasing a sC 12 or 14 try and get one with the manifolds. they could come in handy.

5/ I think the Dellorto 40 DHLA was a good chice. seemed to have no issues with it and can handle the 3-5 psi of my elecric fuel pump with no return to tank feed needed.

6/ I was happy that I got my engineer to fix the clutch pulley with three precision bolts and the crank pulley also. wasnt that costly and takes the guessing out. In hindsight the tensioner mount could have been on a better adjusting angle. Works fine but if its not 90 degrees from the belt adjustment suffers. Is located just above the water pump pulley.

7/ I was happy with the following decisions: location of the supercharger, utilising the cast iron alternator mount, Ford EA belt tensioner is a gem to use, carbie choice, supercharger size (didnt need the SC14), draw through rather than blow through, the digital boost gauge (cheap on ebay and easy to read), ribbed belt rather than V-belt which was my first choice, utilising a 5pr-0965 belt a common size.

steptoe · Post by **steptoe** » Wed Jul 04, 2012 10:57 pm

Can't wait for you to test drive it with the guppy in tow in your mountain of choice

Tweety · Post by **Tweety** » Wed Jul 04, 2012 11:19 pm

Yeh Steptoe....that'll really tell its worth. Taking it out in the morning. Now that the timing has been correctly set (last tiem forgot to block the vacuum) I'm hoping I've got rid of the hesitation in the throttle.

Bloody sound awesome and revs much quicker.

steptoe · Post by **steptoe** » Thu Jul 05, 2012 8:46 am

Now that the go is nearly sorted, how about the whoa ? Hate to hear the engineer is required by law to see Toyota SC donor brakes fitted !!