Willie's Single Hitachi EA81 re jet

Willy Fisterbottom · Post by **Willy Fisterbottom** » Thu Oct 09, 2014 8:33 am

So I finnally dug up my notes from when I re jetted the Hitachi.
I used a Hitach that I think was out of a 2 litre Toyota for the jets, I only changed the jets if they were bigger out of the unknown carb.

Happy to race for pinkslips any N/A Weber EA Subaru.

Stock EA81 Hitachi was:
Primary main jet 110
Secondary main jet 140
Primary main air bleed jet 70
Secondary main air bleed jet 80
Primary slow jet 85
Secondary slow jet 42
Primary slow air bleed jet 160
slow air bleed air bleed jet 80

After re jetting it was:
Primary main jet 112
Secondary main jet 156
Primary main air bleed jet 70
Secondary main air bleed jet 100
Primary slow jet 85
Secondary slow jet 100
Primary slow air bleed jet 160
slow air bleed air bleed jet 80

steptoe · Post by **steptoe** » Thu Oct 09, 2014 8:37 am

You might be on, just wait until I can adapt my Masport 485 to take an EA81, take the cutting disc off the bottom

Willy Fisterbottom · Post by **Willy Fisterbottom** » Thu Oct 09, 2014 8:41 am

steptoe wrote:You might be on, just wait until I can adapt my Masport 485 to take an EA81, take the cutting disc off the bottom

Masport isn't a Subaru!

Happy to race for pinkslips any N/A Weber EA Subaru

Subydoug · Post by **Subydoug** » Thu Oct 09, 2014 8:53 am

Id race you willie, but only if you stick a cow in the boot to match my curb weight

. My ea81 is efi now so I probably dont apply. How did you pick those sizes over stock? reading plugs?

Regards

Doug

Willy Fisterbottom · Post by **Willy Fisterbottom** » Thu Oct 09, 2014 9:05 am

Just took the jets out of a 2 litre toyota ( Ithink it was from a Hilux)

Silverbullet · Post by **Silverbullet** » Thu Oct 09, 2014 4:34 pm

Not sure if that would be a fair race Willy; how much does that MK I Leone weigh exactly?

So what kind of fuel mileage do you get out of this setup? Does it use much more than with stock jets?

steptoe · Post by **steptoe** » Thu Oct 09, 2014 10:21 pm

must be something wrong with it coz he went to twins

Willy Fisterbottom · Post by **Willy Fisterbottom** » Fri Oct 10, 2014 7:41 am

Silverbullet wrote:Not sure if that would be a fair race Willy; how much does that MK I Leone weigh exactly?

It's now in the 83 Hardtop, it weighs 957kg compared to the 1072kg of a 4wd wagon and 1018kg of a Brumby.

Silverbullet wrote:So what kind of fuel mileage do you get out of this setup? Does it use much more than with stock jets?

I lost about 40kms from a tank.

steptoe wrote:must be something wrong with it coz he went to twins:evil:

I went to the Twins searching for more power, The Twins seem a bit better up in the top end but a bit slower off the mark. Fuel economy is the best with the twins, get 620kms from 40 litres

Now have another twin set I bought dirt cheap off facebook, gonna re jet them and do a few other little tricks before putting them in a Fugly

Willy Fisterbottom · Post by **Willy Fisterbottom** » Fri Oct 10, 2014 9:57 am

I've scanned and uploaded my Subaru Hitachi Carburetor Training Manual.

YouTube · Post by **El_Freddo** » Sun Oct 19, 2014 8:49 pm

I'm going to have to download that manual!

And thinking about this I've got a carb off an '80 something Corona which is the same petrol engine as the Diahatsu scat - so I'm going to dig that up and see what I can come up with

I haven't played with carbs in years, and even with that it was never anything like this!

Cheers

Bennie

Willy Fisterbottom · Post by **Willy Fisterbottom** » Mon Oct 20, 2014 6:43 am

El_Freddo wrote:I'm going to have to download that manual!

And thinking about this I've got a carb off an '80 something Corona which is the same petrol engine as the Diahatsu scat - so I'm going to dig that up and see what I can come up with

I haven't played with carbs in years, and even with that it was never anything like this!

Cheers

Bennie

I had a Daihatsu Scat, it was Diesel. I once made the mistake of Googling Daihatsu Scat.......

YouTube · Post by **El_Freddo** » Wed Oct 22, 2014 9:28 pm

My brother has two Scat Diesels - one registered now with a 5 speed turbo setup and the other in pieces...

It's got loads of character - and there's a thread on it here somewhere!

Cheers

Bennie

Willy Fisterbottom · Post by **Willy Fisterbottom** » Thu Oct 23, 2014 6:38 am

El_Freddo wrote:My brother has two Scat Diesels - one registered now with a 5 speed turbo setup and the other in pieces...

It's got loads of character - and there's a thread on it here somewhere!

Cheers

Bennie

We called my Diesel Scat "The Tractor"

taza · Post by **taza** » Fri Apr 03, 2015 8:46 pm

Any idea if the bigger secondary jets out of the ea82's Hitachi may work?

Willy Fisterbottom · Post by **Willy Fisterbottom** » Sat Apr 04, 2015 7:35 am

I looked at the EA82 jet sizes in the workshop manual and they are bigger. I haven't tried them yet, but I'm sure with a bigger exhaust and different air filter they'd make a big difference. I am currently looking at rejetting and or bigger carbs on my spare twin set.... Stay tuned.

taza · Post by **taza** » Sat Apr 04, 2015 10:31 am

Ok cool. Might strip one down and see what I can do with a ea82 and ea81...
Ea82 carb been doneoto ea81 engine? I don't like the idea of the auto choke.