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Valve Springs In an AU 

 

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 Post subject: Valve Springs In an AU
Posted: Fri May 21, 2010 9:52 pm 
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Can any one tell me what are the recomended valve springs in an AU running a WADE 1645 camshaft? and or is the a better spring if standard is ok

 

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 Post subject: Re: Valve Springs In an AU
Posted: Fri May 21, 2010 11:48 pm 
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the au1645 can run on std valve springs...
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 1:08 pm 
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TROYMAN wrote:
the au1645 can run on std valve springs...

Yeah i no but isnt it better to upgrade? so there is better lift or something, or stronger

 

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 2:29 pm 
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ide be more worried about the retainers than the springs...

 

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soon to get: AU diff, upc 330mm brakes, Vapor LPG injection.

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 2:35 pm 
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ausedwagon wrote:
ide be more worried about the retainers than the springs...

Why do you say that?

 

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Now, I've got a message for all the other drivers out there. If you smell a delicious, crispy smell after the race, it's not your tailpipe. It's just a little of Shake...and Bake!
SHAKE AND BAKE

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 2:47 pm 
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the retainers are press powder so they crack with anything bigger than a xr cam. i had mine do it so i now have crow cro-mo retainers

 

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eaton M112 supercharger, lowered a tad, extractors, 2.5" exhaust, T5 , custom SureCam supercharger cam, 3.45 lokka, 2 piece tailshaft, poyair bags in the back, TSS front Skirt, Sprint skirts, XR wagon spoiler.
soon to get: AU diff, upc 330mm brakes, Vapor LPG injection.

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 4:17 pm 
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looks like your gonna be changing few things matt? :P
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 4:59 pm 
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....does it sammy?? I was gonna change springs because i thought there was better options, and i guess ill change the rest either instead or aswell people say crow double springs are better all round!!

 

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Now, I've got a message for all the other drivers out there. If you smell a delicious, crispy smell after the race, it's not your tailpipe. It's just a little of Shake...and Bake!
SHAKE AND BAKE

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 5:12 pm 
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imo it will be fine...
im running the 1645 cam with std valve springs with over 10 psi boost and i have been reving it to 6000 rpm and there is no problems!!!!
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 5:19 pm 
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TROYMAN wrote:
imo it will be fine...
im running the 1645 cam with std valve springs with over 10 psi boost and i have been reving it to 6000 rpm and there is no problems!!!!

Awsome to the max!! Did you change retainers

 

_________________

Now, I've got a message for all the other drivers out there. If you smell a delicious, crispy smell after the race, it's not your tailpipe. It's just a little of Shake...and Bake!
SHAKE AND BAKE

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 5:58 pm 
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ford-racer46 wrote:
TROYMAN wrote:
imo it will be fine...
im running the 1645 cam with std valve springs with over 10 psi boost and i have been reving it to 6000 rpm and there is no problems!!!!

Awsome to the max!! Did you change retainers


nope... the engine is std except for the cam...
but if you feel the need to change the springs, by all means it wont hurt!!
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 6:01 pm 
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TROYMAN wrote:
ford-racer46 wrote:
TROYMAN wrote:
imo it will be fine...
im running the 1645 cam with std valve springs with over 10 psi boost and i have been reving it to 6000 rpm and there is no problems!!!!

Awsome to the max!! Did you change retainers


nope... the engine is std except for the cam...
but if you feel the need to change the springs, by all means it wont hurt!!

Oh excellent so what happened to ausedwagon was just one of those things

 

_________________

Now, I've got a message for all the other drivers out there. If you smell a delicious, crispy smell after the race, it's not your tailpipe. It's just a little of Shake...and Bake!
SHAKE AND BAKE

Top
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 8:40 pm 
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ford-racer46 wrote:
....does it sammy?? I was gonna change springs because i thought there was better options, and i guess ill change the rest either instead or aswell people say crow double springs are better all round!!


Double springs don't fit on Au heads without considerable machining. AU's run progressive rate beehive springs whilst E series run straight linear springs.

And be careful cause you don't want to over-spring your valve train. Yes it is better to go stiffer than softer but you don't want to go overkill, cause essentially you will over "kill" your valve train.
If I was you I'd ask wade themselves for any recommendations.
Having said that I have a spreadsheet I knocked up a few years ago which determines the correct valve spring stiffness for any given cam on a sidevalve engine. If you can give me some specs on your rocker geometry (mass, end to centre distances, mass moment of inertia of your rocker) as well as your valve spring stiffness for a range of lifts as well as the mass of the valve spring, and finally a lift plot of your cam (lobe lift in 2.5 degree increments) then I could modify it for OHV applications.
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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 9:00 pm 
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xcabbi wrote:
ford-racer46 wrote:
....does it sammy?? I was gonna change springs because i thought there was better options, and i guess ill change the rest either instead or aswell people say crow double springs are better all round!!


Double springs don't fit on Au heads without considerable machining. AU's run progressive rate beehive springs whilst E series run straight linear springs.

And be careful cause you don't want to over-spring your valve train. Yes it is better to go stiffer than softer but you don't want to go overkill, cause essentially you will over "kill" your valve train.
If I was you I'd ask wade themselves for any recommendations.
Having said that I have a spreadsheet I knocked up a few years ago which determines the correct valve spring stiffness for any given cam on a sidevalve engine. If you can give me some specs on your rocker geometry (mass, end to centre distances, mass moment of inertia of your rocker) as well as your valve spring stiffness for a range of lifts as well as the mass of the valve spring, and finally a lift plot of your cam (lobe lift in 2.5 degree increments) then I could modify it for OHV applications.

Well cabbie, instead of pising you off by saying HUH? :lol: ill just leave it as it is and hope its sweet, are all AU heads equal or does the were and tare make a differance? Bull s**t eBay...some dude said double valve springs were ok! :x Do you think stiffness in springs if matched with a cam, will make it run better

 

_________________

Now, I've got a message for all the other drivers out there. If you smell a delicious, crispy smell after the race, it's not your tailpipe. It's just a little of Shake...and Bake!
SHAKE AND BAKE

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 Post subject: Re: Valve Springs In an AU
Posted: Sat May 22, 2010 9:30 pm 
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Too stiff will rob power and cause excess wear. And on an old school flat tappet cam, really stiff will snap the lobes clean off the cam.

Like I said racer, beware the interwebbs there's a lot of s**t floating around.

By the way you mentioned somewhere that you have done a cam change? Did you at lease get a good look at the valve springs?
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