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Are those calcs for fuel injection or carby? A rough guide has been for efi - match intake volume total to engine capacity , so 1800cc. The safari twin carb set up were basically downdraught manifold with carb sitting directly above the ports. I'd reckon the alternator needed a sideways step. The c...

for those that may be interested I have new specs for the standard EA81 inlet manifold design. The previous specs were incorrect as I enttered a wrong camshaft parameter into the calculator. The new specs have been triple or more checked and I know they are good and what I will now use. 16.5 inches ...

maybe hoppers crossing was a bum steer, sorry. Itwas . Rising Sun Car Service small logo. Citizen Freeman trading as. Rising Sun Car Service 566 Main North Road Gepps Cross SA 5094 ... http://www.risingsuncarservice.com.au Is it 29 inches divide by two for boxer engines. Steel suppplies, welding sh...

steptoe wrote:B4 you leave Adelaide , poke your nose in at Hoppers Crossing Rising Sun Service, Steve may have some tips or bits to buy for go faster - bit of a Subaru guru

I cant seem to findhim in Adelaide.

Is there one here as I have found a Hoppers crossing in Vic but not here?

after some time on automotive calculator websites I have come up with intake runner lengths and diameters. I used the standard specs for an EA81 going of the 2400 rpm maxtorque and 4800 rpm max horsepower settings straight out of the Subaru manual. Of course a cam grind would change where the rpm of...

thanks for the comments and links. The sub4 heads are a little (or a lot) out of my league. I have been doing some homework on intake manifolds and when I get time I have some formulas I have found to calculate optimum intake runner lengths and diameters for diffrent applications (low down torque up...

the above is a highrise intake off an EA82 MPFI or Turbo engine out of a my88 on Vortex. The 2 port heads from the EA82 will not work on the EA81, but you can get very nice 4 port heads and EFI intakes for the EA81 from a mob called SUB4, definatley worth getting, almost worth downgrading from an E...

My avatar tells me Im not subscribed. Is there a fix for that that I havent realised as everyone else seems to be subscribers and I thought I was too.

cheers

keep the dream alive - research the Safari EA81 option of down draught weber on each head. You need to include a thermostat housing and no harm in using a rubber heater hose to join left to right custom manifold. I'd like to see someone make up a sand cast manifold incorporating the head to manifol...

That looks interesting and with the right mods it could be done. What is that intake of if you dont mind me asking (obviously Subaru but what model, engine size etc.)? It appears to have 2 runners on each side (4 all up) but I could be wrong it may be a single runner judging by how the runners appea...

Hi guys Im new to the forum but have been reading and gathering information for some time on the mighty subaru L series. I have decided to get one of these superb machines for myself. I have attempted to find info using the search function for anyone who has put together a custom intake manifold for...