Tweety's ea81 build

Tweety · Post by **Tweety** » Tue Jun 17, 2014 9:57 pm

thanks Jules...Re the manifold spfi type....actually I've measured the ends of the manifold and they holes are the same size as the stock manifold holes. meaning the body is 6mm diameter larger but the rest is the same. Odd eh.

I'll speak to my engine builder in Benalla and chat about the pistons etc. Will need to confirm the oversize needed of the new pistons first.

Tweety · Post by **Tweety** » Tue Jun 17, 2014 9:58 pm

actually those pistons are standard. will need oversize as my cylinders will be rebored.

steptoe · Post by **steptoe** » Tue Jun 17, 2014 10:27 pm

Having seen an awesome piece of kit Willy scored on ebay - an EJ kitted with custom chunks to take a Weber directly above each intake port - he may be willing to part with that freakish screamer EA81 he has ..if he hasn't brocken it yet

0- 100kph in 7.2 seconds and he hasn't found third of five gears at this velocity !!

Though his unequal exhaust may be difficult for Tweety to hide

Quoting Tony

actually I've measured the ends of the manifold and they holes are the same size as the stock manifold holes. meaning the body is 6mm diameter larger but the rest is the same. Odd eh.

This might be Fujis effort along the lines of intake manifold volume below throttle body? should be near equal to the engine capacity for better performance or efficiency ??? Minimal I am sure

Tweety · Post by **Tweety** » Wed Jun 18, 2014 4:51 pm

thanks Jonno, I am wanting an all new engine. At my stage in life if I get brand new internals it will see me out without another reco. or rings and bearings only.

I've swapped engines a lot in my time. Zephyr 6's and lotus. often I end up with regrets. also am burned out working on tweety. its tine to do this once and once only.

am off to Qld and when I get back I'll be into the project. Tony

Tweety · Post by **Tweety** » Sun Jun 29, 2014 7:43 pm

Been doing research.
Apparently using Ea71 pistons in an EA81 will raise compression to 9.0. When using EA81 spfi pistons in an ea81 comp will rise to 9.5:1. The latter is my choice.
Piston sets with engine parts are $287 USD from http://rpmmachine.com/engine-rebuild-kits-subaru.shtml I would order without the timing belt etc.

As soon as we are back from Qld the ordering begins. Gotta neasure the bore first but I'm sure it hasnt been rebored before.

steptoe · Post by **steptoe** » Mon Jul 28, 2014 7:47 pm

that page you linked looks exactly the same as one I found on google - maybe same people and I just did not notice

what I did notice is it looks like spfi and mpfi is the same kit, would make the pistons the same? I have an mpfi NA block kicking about, must check out its pistons appearance to compare. Might have to slap me heads on it and see if it hoots any better than my carb block with mpfi heads - next lifetime maybe

Brumby Kid · Post by **Brumby Kid** » Mon Jul 28, 2014 9:49 pm

Tweety wrote:

A crossover pipe like the old V8 boys run. Wonder how this goes for performance and noise. Got a video Tweety?

Tweety · Post by **Tweety** » Tue Jul 29, 2014 3:12 pm

Dont think it would operate as good Cam without that cross over pipe. Sounds ok, could be a bit quieter but thats my age lol. See the bike baffles in the pipe ends? they help a bit.

Auto is ready to go in. This second auto I have just purchased, got it serviced and all new seals and gaskets and critically the "O" ring between the auto and diff has been changed.

Brumby Kid · Post by **Brumby Kid** » Tue Jul 29, 2014 3:28 pm

Tweety wrote:Dont think it would operate as good Cam without that cross over pipe.

Hmm wonder what would be better, standard Y pipe or crossover

Tweety · Post by **Tweety** » Thu Jul 31, 2014 7:45 pm

Cam, you think too much lol

Well guys I got done by the dreaded car manufacturers "slight alterations" mentality.

I got my 'new' transaxle half way into the trike bay and wondered where the mounting holes were on the diff housing. There werent any!!. These holes allow 4 large hex head bolts to attach the trike frame to the diff.

So onto Aussieveedub forum and they revealed that the transaxle out of the trike is from a 411/412 VW sedan 4 DOOR model amde from 1968 to 1972 and 1972 to 1974. Google it and you'll find it indeed has 4 doors and four round headlights, quite rare I think. Common in Europe though. I dont know if Oztrikes has the same. But there are many Panther trikes with the 411 auto/diff in them here in Oz.

So, what to do? Swap the autos with the diffs? An operation I wouldnt feel confident in doing. Or send off the transaxle from the trike to get the same treatment seals gaskets and service AND to fix why it over revs the engine in first gear.....another $500 probably. Then I'll have a second fully services VW type 3 transaxle sitting here that I might sell. Then purchase a 411 TA for a spare.

Havent heard from the engine builder yet.

On aussieveedubbers forum (non vW conversions) there is a pic of the transaxle in a 411/412 VW body. I can see why VW did it. But every Panther owner with an auto has believed it was a type 3 auto...it was, but not the diff housing that is normally sold as one unit. So not VW's fault, but I suppose I've been stung so many times over the years I expected it was. So, I've informed as many trike VW auto owners as I can that - Surprise- you dont have a type 3 diff- its a 411 or 412.

steptoe · Post by **steptoe** » Fri Aug 01, 2014 8:20 am

spit !!

YouTube · Post by **El_Freddo** » Sun Aug 03, 2014 8:12 pm

So what's the plan from here Tony? Bloody Murphy, had to wait untill AFTER you got the box reconditioned! It does look very nice in that colour though!

Can an adapter frame be made to fit the mount points on Tweety and this box?

Cheers

Bennie

Tweety · Post by **Tweety** » Sun Aug 03, 2014 9:47 pm

Tweetys original auto is at GV auto for the same treatment- new seals especially between auto and diff where they fail. Adjust and service and return. Then I'll reinstall it and likely sell the newly obtained auto transaxle to a VW type 3 owner.

I'm told by a guy on aussieveedubebrs my transaxle is out of a type 4. But there arent many in Oz, a 4 door sedan. I reckon its a kombi box but that would be a 4.4:1 diff or thereabouts and it isnt. I'll find out more in the future.

I can still keep the new transaxle just the auto would be of use to me only and they arent common nowadays.

They are bulletproof though so after a time will offload it.

Taking the SPFI manifold to Carrum Downs tomorrow to a mate place to get an adapter made up for the 38/38 weber

. ps the old tranny will get the same alloy paint finish that you like lol

Tweety · Post by **Tweety** » Fri Aug 08, 2014 11:22 pm

What spark plug gap do you guys have?

On the net I've read everything from 28-44 thou. Stock NGK

YouTube · Post by **El_Freddo** » Fri Aug 08, 2014 11:42 pm

I'll have a look at the service sticker under the bonnet on Redback, I remember the MPFI EA82 is 1.1mm, but the carbie spark gap was smaller - but I can't remember if it's 0.8 or 0.9mm.

Cheers

Bennie

Nubaru · Post by **Nubaru** » Sat Aug 09, 2014 8:56 am

used to tinker with these gaps and coils years ago - went heaps better going from factory 0.8mm no idea how many tous that is to 1.0mm = fatter spark more power with new transformer coil instead of oil filled coil. Got more power only because I wanted to believe I was doing the good thing. Imagination has got a bit carried away then. Now, is 0.8mm NGK BP6ES that come gapped as 0.8mm for some good reason.Need to hire a dyno next time I play with gaps

Post by **TOONGA** » Sat Aug 09, 2014 11:29 am

Under the bonnet of my brumby the sticker says 0.8mm for spark plug gap, 6 degrees BTDC and idle set from factory.

The American EA81 1983 FSM I have says 1.0-1.1mm sparkplug gap, 6-8 degrees BTDC and idle set from factory.

In the end it depends on engine specs, fuel and application of the engine

TOONGA

Silverbullet · Post by **Silverbullet** » Sat Aug 09, 2014 12:18 pm

.9mm on my sticker I think, 6 degrees BTDC and I think it even has a % CO2 emissions at idle or something like that. I've got an MSD blaster coil on the way for my ute, going to increase the gap and see what difference it makes.

Tweety · Post by **Tweety** » Sat Aug 09, 2014 9:17 pm

thanks, yeh got the blaster coil, 8mm red leads etc.

will use stock plugs and gap it at .009. should be ok. want to use 95 fuel. As my flywheel went south when I replaced it with an engine adapter, I've made up a pointer at 6 BTDC which ironically is 6mm along the crank pulley (outer).

Got the auto trans back in. waiting for the engine builder now.

Tweety · Post by **Tweety** » Sun Aug 17, 2014 5:27 pm

Auto trans is in ready for the engine which has been delayed. builder is starting it this coming week.