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ef cam to au engine? 

 

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 Post subject: ef cam to au engine?
Posted: Tue Jan 06, 2009 1:02 pm 
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will a ef cam fit to the au engine thinking of doing the au engine con to my ef and want to know if i going to have to change much other than doing the sump mod?

 

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Posted: Tue Jan 06, 2009 1:14 pm 
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Only way to fit an EF cam in an AU motor is to use all the EF timing gear.

AU and EF use different rocker ratios'

Placing an EF cam in a stock AU will force valves to pistons or break lifters.

 

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Posted: Tue Jan 06, 2009 2:51 pm 
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Krytox wrote:
Only way to fit an EF cam in an AU motor is to use all the EF timing gear.

AU and EF use different rocker ratios'

Placing an EF cam in a stock AU will force valves to pistons or break lifters.


not it wont.

using an EF cam in an AU will have LESS valve lift.

and you can use AU cams with early rockers.
crow number 2222549 is listed for EA to EF
crow number 2232549 is listed for EL to AU.

they are the same cam. it just produces less lift with AU rockers.

 

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Posted: Tue Jan 06, 2009 4:26 pm 
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so i can use my cam with my rocker gear on the au head and that will give the corect lift then ?

 

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Posted: Tue Jan 06, 2009 4:52 pm 
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tickford_6 wrote:
Krytox wrote:
Only way to fit an EF cam in an AU motor is to use all the EF timing gear.

AU and EF use different rocker ratios'

Placing an EF cam in a stock AU will force valves to pistons or break lifters.


not it wont.

using an EF cam in an AU will have LESS valve lift.

and you can use AU cams with early rockers.
crow number 2222549 is listed for EA to EF
crow number 2232549 is listed for EL to AU.

they are the same cam. it just produces less lift with AU rockers.


This explains why this cam did nothing in my au. crow are a pack of thieves. Ring waggot cams, can't wait till I've got figures to back up my new 760 grind.

On another note I've just seen a set of au rocker gear that was bolted onto an ef using an ef cam. It f**k the cam and rocker gear because it ground out under the rocker arms where it was hitting.

 

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Posted: Tue Jan 06, 2009 5:19 pm 
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ebxr82nv wrote:
tickford_6 wrote:
Krytox wrote:
Only way to fit an EF cam in an AU motor is to use all the EF timing gear.

AU and EF use different rocker ratios'

Placing an EF cam in a stock AU will force valves to pistons or break lifters.


not it wont.

using an EF cam in an AU will have LESS valve lift.

and you can use AU cams with early rockers.
crow number 2222549 is listed for EA to EF
crow number 2232549 is listed for EL to AU.

they are the same cam. it just produces less lift with AU rockers.


This explains why this cam did nothing in my au. crow are a pack of thieves. Ring waggot cams, can't wait till I've got figures to back up my new 760 grind.

On another note I've just seen a set of au rocker gear that was bolted onto an ef using an ef cam. It f**k the cam and rocker gear because it ground out under the rocker arms where it was hitting.


ok so now it's explained. you were sent wrong the cam card.
I wouldn't call a pack of thieves, it's listed as a very mild cam for the au with bugger all lift. it's not like they claim it to be a big cam.



2232549 .476" .450" <--- AU lift
2222549 .530" .500" <---- EA-EF lift

i noticed in your thread you left out the first half of the part number,
You also told me in that thread that they have "redesigned it" to make power from 1800 to 5000rpm, if they had done so, it would carry a new part number.
something makes me think you new what was going the whole time.

 

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Posted: Tue Jan 06, 2009 7:37 pm 
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Ok so they sent the wrong card but they assured me on three seperate occasisions that in was the right specs. The cam was supposed to be a billet after all. Before ordering the cam my mechanic spoke with them and told them what I wanted. I wanted the 546 grind, but john said " no no no you want the 549 cause that will give you every thing you want, it's been redesigned to be closer to the 546 than it was before it will give you everything you're looking for". To that I say rubbish.
It didn't go any better really than it did before, I've got a waggot 760 now and it feels like a cam should. It's chunky as a mofo and cracks hard and hasn't been dialed or tuned yet. Should be fun watching my 250k motor make 160-170 at the treads. Mind the head hasn't been off so there's noport or polish job on this one.

 

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86 ZL mint grandpa spec with premo sound and 150000km
07 TTG 60000km stock as, mods to come.
97 el futura about to be MOCKed

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Posted: Tue Jan 06, 2009 8:11 pm 
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ebxr82nv wrote:
Ok so they sent the wrong card but they assured me on three seperate occasisions that in was the right specs. The cam was supposed to be a billet after all. Before ordering the cam my mechanic spoke with them and told them what I wanted. I wanted the 546 grind, but john said " no no no you want the 549 cause that will give you every thing you want, it's been redesigned to be closer to the 546 than it was before it will give you everything you're looking for". To that I say rubbish.
It didn't go any better really than it did before, I've got a waggot 760 now and it feels like a cam should. It's chunky as a mofo and cracks hard and hasn't been dialed or tuned yet. Should be fun watching my 250k motor make 160-170 at the treads. Mind the head hasn't been off so there's noport or polish job on this one.


the heads don't flow enough for that power. if it make that, i'd be questioning the dyno.

 

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Posted: Tue Jan 06, 2009 8:49 pm 
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Meh, i say go hard brother and prove all the know it alls wrong.
Its going against the grain that gives you character. :wink:

 

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Posted: Tue Jan 06, 2009 11:07 pm 
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green car wrote:
Meh, i say go hard brother and prove all the know it alls wrong.
Its going against the grain that gives you character. :wink:



yeah dude. go for it. prove to use that a lack of airflow won't hold you back :roll:

 

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Posted: Tue Jan 06, 2009 11:09 pm 
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so can anyone tell me if the ef cam and rocker gear will go onto the au head if i do the engine change?

 

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Posted: Tue Jan 06, 2009 11:26 pm 
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falcon_3512003 wrote:
so can anyone tell me if the ef cam and rocker gear will go onto the au head if i do the engine change?


yes it will, it's been done many times befor

 

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Posted: Tue Jan 06, 2009 11:40 pm 
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thanks i dont wana go buy a new cam for the au engine and dont want to stuf it be for i go ahead the putting the au in my car

 

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Posted: Wed Jan 07, 2009 10:31 am 
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tickford_6 wrote:
green car wrote:
Meh, i say go hard brother and prove all the know it alls wrong.
Its going against the grain that gives you character. :wink:



yeah dude. go for it. prove to use that a lack of airflow won't hold you back :roll:


Oh well if it doesn't it's not to much trouble to get the head off and get the job done. If it makes 160 I'll be happy for now.

 

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86 ZL mint grandpa spec with premo sound and 150000km
07 TTG 60000km stock as, mods to come.
97 el futura about to be MOCKed

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Posted: Wed Jan 07, 2009 10:37 am 
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ebxr82nv wrote:
tickford_6 wrote:
green car wrote:
Meh, i say go hard brother and prove all the know it alls wrong.
Its going against the grain that gives you character. :wink:



yeah dude. go for it. prove to use that a lack of airflow won't hold you back :roll:


Oh well if it doesn't it's not to much trouble to get the head off and get the job done. If it makes 160 I'll be happy for now.


the AU heads are good base to start with,

 

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