Thom's 4.0l thread

[FORD_MAN 1,026]

probably a stupid question. Do you know if you can fit E-series rockers to AU rocker shafts?

just something I have been thinking about, just got a crow stage 3 cam for my AU

and wouldn't mind having 530/500 lift rather then 476/450.

[Thom 6,650]

You can but it still won't.work the Au has a different length valve stem and a different base circle on the cam

[n00bus m@x1mus 465]

Im sure there is a reason they went to a lesser ratio for the au head and it wont be to detune it in any way. I bet they dropped ratio and raised cam lobe profile and achieved the same lift with less valvetrain load on the timing chain and harmonics in the head.

 

One question i had spring to mind the other day... i wonder if it would be possible to run a ba crank in the au block and then fit the crank driven oil pump inside the timing chain cover?

[Thom 6,650]

<br />Im sure there is a reason they went to a lesser ratio for the au head and it wont be to detune it in any way. I bet they dropped ratio and raised cam lobe profile and achieved the same lift with less valvetrain load on the timing chain and harmonics in the head.<br /><br /><br />One question i had spring to mind the other day... i wonder if it would be possible to run a ba crank in the au block and then fit the crank driven oil pump inside the timing chain cover?

Shhhhh I have a little project im working on<br />

[SPArKy_Dave 8,865]

Are the 91DA cams the EA cams everyone is talking about?

 

Both my XG's came out with these cams. The 93 Panno, has a 91DA head too

The 95 Ute, has a 94DA head.

 

I'm also working on a 97 EL atm, which has a 96DA head, and a 95DA cam (but the cam is stuffed).

Some of the lobe surfaces are eroding, and the same on the rocker arm rollers too.

Never seen that before on an E-series.

 

Oh well, an excuse for getting another custom cam.

 

What cam specs would be recommended, for an engine that's auto, standard diff.

Maybe light head porting, and a cat back exhaust too.

Nothing too wild - would be stoked with 150rwkw, but high torque is much more important to me.

 

 

Can you get new rollers for the rocker arms?

[Thom 6,650]

You have to be careful with the different cam selections available, an ea cam produces alot more torque when combined with a broadband intake as the long/short changeable runner was introduced Ford downsized the cam to improve fuel economy (there's negligible difference between the two cams in fuel economy) personally using aftermarket cams for what you want I would go for for a wade (1604 or 1636)or camtech cam (ct006 846 or a ct006 848) the 91 da is the cam you want out of the factory cams, they were found in engines with the log manifold, finding new rollers is something I haven't come across yet (not saying there not out there but I haven't found them yet) I usually just go to pick a part and pull done rover covers off until I find a good set<br />

[Thom 6,650]

 

Both my XG's came out with these cams. The 93 Panno, has a 91DA head too

The 95 Ute, has a 94DA head.

 

 

 

The 91 & 92 da heads are worth throwing over your left shoulder unless going back on a standard engine or you wiring to spend some time with a die grinder removing the Dick that shrouds the valves like in a xflow head, 94 da is the pick of the non xr6 heads closely followed by a 96da

[SPArKy_Dave 8,865]

I also got a custom head built, that I haven't used on anything yet -

 

Started with a brand new casting, had it ported and port matched to the standard XG log type manifold, stainless steel XR6 valves, crow 115lb dual springs, crow retainers and collets.

Plus a Clive Cams cam, made from a new billet purchased from Crow.

I got a crow vernier gear for the cam.

Also got a head stud kit to use rather than bolts, and an ACL race series gasket kit.

 

Any good?

 

 

 

 

 

 

[Thom 6,650]

Looks good, personally I would use a broad band intake over the log manifold

[SPArKy_Dave 8,865]

What kind of power/torque would you expect the above head/cam combo to create, compared to standard?

[Thom 6,650]

Standard usually make between 100-110 kw you could see 140-160 rwkw with a good tune and a bbm

[n00bus m@x1mus 465]

Started pulling down this au engine and doing some comparisons between it and the ef tickford head... some pretty interesting figures, but probably not what u would expect.

[Thom 6,650]

Please share Clint

[n00bus m@x1mus 465]

Alright heres some pics of the differences between an AU head and an EF tickford head
 
EF chamber = 60cc
 

 

 
 
AU chamber = 65cc
Note the extra shrouding around the intake valve.
 

 
AU intake
 

 
AU exhaust
 

 
 
EF Tickford intake
 

 
 
EF Tickford Exhaust
 

 
 
And measurements show that the valves are indentical in shape and size, where as the Tickford cam showed 0.055" more lift on the intake valve but same on the exhaust valve.
 
Using a CR calculator it shows an increase from 9.7 to 10.3 if i use this EF head on the AU short without any shaving to true it up.

[n00bus m@x1mus 465]

Oh and strangely enough the AU head weighs 4kg less than the EF head.....  ?????  Quite noticable when you pick them both up over and over again.

[steve mcqueen 1,796]

4kg's clint, in weight, that's huge for almost identical items. Great camera shots to, no blurry images from you.

[gerg 10,871]

While we're on the subject, my brother's trying to sell some EA pistons, they're +0.030 hypereutectics, unused still in box. He just wants a reasonable offer.

 

Great thread, amazing combinations of factory parts from what at face value is supposedly the same engine. My brother just turfed 2 running e-series engines as he couldn't give them away. A shame because they're a great engine. I still have a fondness for my EA S-pack 5-speed.

 

So far I can gather that the best combo using mostly factory bits would be AU bottom end, EF XR6 head, BB manifold, EA cam, Pacemaker 6-3-1s and 2-1/2" exhaust.

 

I've read that factory Ford cats have decent flowing cores but suffer from small inlets/outlets, so cutting and shutting bigger nipples on helps the gas fan out into the whole brick, not just hit the centre of it and this mod opens them up a lot. I've actually done this and it seemed to work well.

[n00bus m@x1mus 465]

Yeah i was surprised to see it too steve. I had to weigh them just to prove i wasnt going mad lol. When u pick them up side by side you can really notice it. I winder if the au head has larger water jackets or something??? They look identical from the outside... only diff is the rocker gear and springs. Might have to dissassemble further and see where it all comes from. Comparing them against each other i would say doung a bowl job and a light shave on the au head would be the way to go being that u get the lighter (on the chain, maybe overall too) valve train with the same spec head as a tickford.

[Thom 6,650]

The only thing is there is far greater cam availability for an e series head, and the rocker gear doesn't interchange due to different length valve stem

[Clevo120Y 815]

If I can get access to all the different heads I will flow test them all in standard form so we can put together the best stock parts engine, I can test the manifolds as well so we can compare apples with apples.

[n00bus m@x1mus 465]

Cant fit the e series valves in with the rockers? Or is the guide the wrong diameter?

[Thom 6,650]

Smaller.diameter valve stem on the Au head

[steve mcqueen 1,796]

 "so we can put together the best stock parts engine.

That would be awesome. With some team work and parts from stock ford engines we could build an engine that gives great response for either towing or reliability and a plus if we could do it on the cheap.

[Thom 6,650]

Wouldn't be surprised if it ends up, Au short, Ef xr6 head, ea cam bbm, It made 178rwkw with a tune and cost less than $500 in parts to build, I pulled heaps of them apart at pick a part just to see what's different between them

[n00bus m@x1mus 465]

So whats the go with a good cam for these things. I was perusing the usual sites for cam specs this arv and they seem to have a hell of a lot of choices for the ea-el range but most of them are just like the next. No real difference between them until u get to the last 3 or so on the list that are for mid-top end. And even then the lift is marginal... only around 25-30 thou more than the xr cam i got now.