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dc_todd
Fordmods - Getting Side Ways
Age:30
Posts: 3030
Joined: 05 Nov 2004
Location: Gymea NSW, Australia
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 Posted: Sat Mar 29, 2008 12:53 am Post subject: |
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ok your call.. I know it works, I've seen it work, and I know of people who run this setup in their cars with out a prob. the Issue Weeman had is not related to the E series rocker gear and cam its related to the RPD stg 4, these are a big monster f$%ker cam, they are the most lift you can have without doing stuf like butterfly cutting pistons and stuff, I have run the cam myself, no issues here with snapped springs,
ths issue that the AU head with the stg 4 is that it has conical springs, these bind with the amount of lift this particular cam has and therefor they snap, however, I highly doubt you will come across or install a cam in your car with the sort of lift these have. the E-series cam and rocker gear will still have the same lift and duration as the AU gear, it just has a different rocker geometry, the au was revised to smooth it out a bit thats pretty much all, without getting to technical.
IF
you do decide to do it, you just need to make sure you change the complete rocker assembly, pedastals ans all and cam.
your big advantage is that there are heaps of options for cams in the E-series range as the car was round for so long with no major revisions in the cam/ rocker gear area.
If
the supplier tells you to change springs, do it, otherwise they run a good chance of failure, and there is not muxh worse than a dropped valve smashing away at you pistons,
It is with confidence that I know this works, so i will leave it up to you, either leave it up to masses who are speculating and saying it PROBABLY won't, or take some advise from people who have done it and seen it working..
your car, your call. |
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green car
Fordmods - Getting Side Ways
Age:31
Posts: 567
Joined: 27 Sep 2007
Location: perth WA, Australia
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| Posted: Sat Mar 29, 2008 1:17 am Post subject: |
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Ok so as long as i bolt the ef cam and complete matching ef rocker gear on it will be fine.do i have to swap the ef rocker arms to the au pedestals?  |
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fiftyone
Fordmods - Getting Side Ways
Age:21
Posts: 2433
Joined: 22 May 2006
Location: Ballarat VIC, Australia
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| Posted: Sun Mar 30, 2008 2:09 am Post subject: |
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| awsome, we might have a solid anwser then. Thanks todd |
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dc_todd
Fordmods - Getting Side Ways
Age:30
Posts: 3030
Joined: 05 Nov 2004
Location: Gymea NSW, Australia
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| Posted: Sun Mar 30, 2008 10:29 pm Post subject: |
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| just need to install the complete E series rocker gear, pedatals and all, don't chang the rocker arms as they are different geometry to the E-series. |
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fiftyone
Fordmods - Getting Side Ways
Age:21
Posts: 2433
Joined: 22 May 2006
Location: Ballarat VIC, Australia
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| Posted: Mon Mar 31, 2008 1:06 am Post subject: |
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| wouldnt have a clue how much a rocker train goes for these days then? (rough price) |
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green car
Fordmods - Getting Side Ways
Age:31
Posts: 567
Joined: 27 Sep 2007
Location: perth WA, Australia
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| Posted: Mon Mar 31, 2008 3:31 pm Post subject: |
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| dc_todd wrote: | | just need to install the complete E series rocker gear, pedatals and all, don't chang the rocker arms as they are different geometry to the E-series. |
Thanks for your help |
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fiftyone
Fordmods - Getting Side Ways
Age:21
Posts: 2433
Joined: 22 May 2006
Location: Ballarat VIC, Australia
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| Posted: Tue Apr 01, 2008 10:27 pm Post subject: |
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| dc_todd, how'd you find out this could be done? |
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turbotrana
Fordmods - Smokin em up
Posts: 240
Joined: 19 Sep 2005
Location: Perth WA, Australia
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| Posted: Thu Apr 03, 2008 1:51 am Post subject: |
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I put the AU conical valve springs under a spring compressor and was surprised how weak they are. These ones came in about 60lbs at the seat where as stock ED springs surprised me at being pretty strong at about 100lb at the seat.
So if you use the AU head the springs are pretty much useless with a performance cam. |
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sly
Fordmods Tyre Shredder
Age:46
Posts: 369
Joined: 09 Feb 2006
Location: Newcastle NSW, Australia
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| Posted: Thu Apr 03, 2008 5:37 pm Post subject: |
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| dc_todd wrote: | | the E-series cam and rocker gear will still have the same lift and duration as the AU gear, it just has a different rocker geometry, the au was revised to smooth it out a bit thats pretty much all, without getting to technical. |
The E-series rocker gear has a 2:1 ratio, the AU is 1.8:1. So a cam with say a .250" lobe lift will give a valve lift of 0.450" with AU rockers and 0.500" with the E-series ones.
This sounds like a sweet upgrade for a force-fed AU, the SC Commode V6 brigade do it all the time... |
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tickford_6
Fordmods - Getting Side Ways
Age:25
Posts: 3896
Joined: 11 Nov 2004
Location: townsville QLD, Australia
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| Posted: Thu Apr 03, 2008 7:29 pm Post subject: |
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| turbotrana wrote: | I put the AU conical valve springs under a spring compressor and was surprised how weak they are. These ones came in about 60lbs at the seat where as stock ED springs surprised me at being pretty strong at about 100lb at the seat.
So if you use the AU head the springs are pretty much useless with a performance cam. |
the AU springs don't need to be as stiff because of the conical design.
they also carry a lighter retainer and lighter valve. |
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meunro00
Fordmods Newbie
Age:21
Posts: 2
Joined: 18 Nov 2006
Location: Perth WA, Australia
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| Posted: Thu Apr 03, 2008 7:40 pm Post subject: |
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| would an au head fit on a 3.9L EA using the bbm style? |
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xavier
Fordmods Stock as a Rock
Age:21
Posts: 148
Joined: 23 Dec 2005
Location: perth WA, Australia
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| Posted: Thu May 29, 2008 6:36 pm Post subject: |
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| can you do a complete head and rocker assembaly swap of an ed onto an au engine and run an e series cam?, im assuming yes if simply swapping the rocker gear is enough. |
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fiftyone
Fordmods - Getting Side Ways
Age:21
Posts: 2433
Joined: 22 May 2006
Location: Ballarat VIC, Australia
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| Posted: Fri May 30, 2008 7:47 pm Post subject: |
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| you wouldnt want to, AU head flows better |
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EBXR8380
Fordmods - Getting Side Ways
Age:55
Posts: 2555
Joined: 07 Nov 2004
Location: Penrith NSW, Australia
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| Posted: Fri May 30, 2008 9:41 pm Post subject: |
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| fiftyone wrote: | | you wouldnt want to, AU head flows better |
The EF on had bigger ports.. BUT they had thicker heavier valves...
What we intend to do as we have 2 AU engines, an EDXR6 and ED GL 6..
We are going to change everything over onto XR6 head so it keeps it a Tickford engine...But EVERYTHING else is AUll... With good N/A E series cam...
Another car, E.D Fairmont turbo with AU engine..
We have bought another AU engine, we are going to fit Spool rods and C.P pistons, E.L valve gear so we can use a good billet cam!!
With some mild porting, most attention done on valve seats etc... |
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