EA81 water pumps

Tweety · Post by **Tweety** » Sat Apr 21, 2012 1:30 am

Just curious...are there any variations on these pumps available?

Have they all got the same flow? Bearing quality?

Also I realsie the EA81 manifold is heated. Jusy renewed the small coolant hoses. But that would make the air/fule mix hotter and therefore less economy. Cold air intake is better then the air is heated...me no understand. Guys? Please explain.

steptoe · Post by **steptoe** » Sat Apr 21, 2012 9:53 am

The manifold is also a coolant transfer between sides and highest point so may sort out air trappings. Being alloy block , heads and manifold really can't see blocking off the heat at the heads as far as coolant goes any real measureable difference. Have blocked off water heated manifolds before with no measureable effect in power or economy, neither did the white paint help !
Most water pumps are GMB made in Japan with pressed steel vanes. Original may have been cast impeller, EA82's were.
Cavitation scaring you ?

Tweety · Post by **Tweety** » Sat Apr 21, 2012 10:12 am

Going supercharged is 50/50 which is an advancement form 90/10 agaisnt a while ago. Likely SC14 for a number of obvious reasons.

So I've read info about the heat transfer/running temps of SC's and cold air intake and wodnered why the ea81 has its manifold heated which should only hamper a Sc set up.

Thanks Steptoe.

YouTube · Post by **El_Freddo** » Sun Apr 22, 2012 7:49 pm

Tweety wrote:So I've read info about the heat transfer/running temps of SC's and cold air intake and wodnered why the ea81 has its manifold heated which should only hamper a Sc set up.

You'll find that it was to help in cold climates and it aids in fuel vaporisation. What you might find with the SC without an intercooler is that the air temps are higher than that of the coolant running along the intake manifold.

Or you could have a go at knocking up something like this with the SC:

From post #108 in this thread

Cheers

Bennie

Tweety · Post by **Tweety** » Sun Apr 22, 2012 8:25 pm

looks nice Bennie.

YouTube · Post by **El_Freddo** » Sun Apr 22, 2012 10:08 pm

Tweety wrote:looks nice Bennie.

Certainly not my work!

I think it'd look awesome in yellow with a SC in there somewhere

Cheers

Bennie

steptoe · Post by **steptoe** » Sun Apr 22, 2012 10:30 pm

'wish people would stop finding these wicked EA81 pics - making me restless

YouTube · Post by **El_Freddo** » Sun Apr 22, 2012 10:33 pm

This one's been around for a few years mate! I've always wondered if this made it into the engine bay... I don't remember reading about it or seeing a photo of it in there.

Cheers

Bennie

Tweety · Post by **Tweety** » Mon Apr 23, 2012 11:13 am

haha Steptoe !!!!!

Wont be long and when owners post questions about their EJ issues we'll be saying

"go EA with a custom intake from Tweety performance, SC14 s/hand and a SU carb. So much easier, no EMU ECU or f..k you's, more compact, no timing belts and easy to work on".

The EA81 is back! The baby boomer engine of choice!

RSR 555 · Post by **RSR 555** » Wed May 09, 2012 11:40 pm

I have not seen any diffences in the output flow or the hose sizes for any EA81 water pumps. The only diffences I've seen is the EA81T has the 2 V-Belt pulley on it. I'm not sure if this was done to help with flow but I guess the harder the pump tries to push, the more it would cause the belt to slip.

Silverbullet · Post by **Silverbullet** » Thu May 10, 2012 5:54 pm

Wasn't there a pump that had the pulley spaced further out? I seem to remember someone on here buying one and installing it only to find the pulley on the pump didn't line up with crank/alt/fan pulleys...

steptoe · Post by **steptoe** » Thu May 10, 2012 8:19 pm

That is the EA82T multi rib versus V belt with 105 and 110 mm deck heights