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Camshaft different? 

 

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 Post subject: Camshaft different?
Posted: Tue Sep 15, 2009 7:55 pm 
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Is the cam from a eb ho 165, the same as an au 175 cam?
Im about 99 percent sure they are but...

 

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 Post subject: Re: Camshaft different?
Posted: Tue Sep 15, 2009 11:13 pm 
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If it has .444 valve lift.. They are the same..
Extra power came through better inlet and maf..

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 11:12 am 
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cheers

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 12:16 pm 
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Crow list their standard replacement cam as having .455' lift, is this the standard lift?

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 3:10 pm 
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Nope .444 is standard.
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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 3:38 pm 
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Cheers, could i get away with using a cam that has got 14 thou more lift than a stock cam with my 1.7 roller rockers,?
Im looking at either a 621339 or 621338 crow cam
The 621339 has .455 lift
the 621338 has .458 lift
I honestly wouldnt have any idea about how much clearance is between the valves and the piston, i thought i might be ok if i didnt get a cam with much more lift than stock just a bit more duration.

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 3:51 pm 
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A general rule of thumb is .500" but cam timing has something to do with it too.
As an example an F303 cam is the largest Ford racing cam you can use without piston to valve issues.
It has .512" lift and 228 degrees @ .050" so substantially larger than what you're looking at.
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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 4:00 pm 
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iv gotta ford roller cam with gt stamped near the dizzy gear is that just the standard cam??

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 7:45 pm 
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XR9UTE wrote:
A general rule of thumb is .500" but cam timing has something to do with it too.
As an example an F303 cam is the largest Ford racing cam you can use without piston to valve issues.
It has .512" lift and 228 degrees @ .050" so substantially larger than what you're looking at.


I have heard that 1.7 roller rockers add roughly 40 thou to valve lift, is this correct?
If it is then i should be ok because total lift should be .498 if i use the .458 lift cam.

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 8:08 pm 
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.444" / 1.6 = .2775" cam lift
.2775" x 1.7 = .471 Valve lift
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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 8:45 pm 
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XR9UTE wrote:
.444" / 1.6 = .2775" cam lift
.2775" x 1.7 = .471 Valve lift


.458 / 1.6= .28625"
.28625 x 1.7 = .486 valve lift

Did i work that right Pete?

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 9:16 pm 
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green car wrote:
Cheers, could i get away with using a cam that has got 14 thou more lift than a stock cam with my 1.7 roller rockers,?
Im looking at either a 621339 or 621338 crow cam
The 621339 has .455 lift
the 621338 has .458 lift
I honestly wouldnt have any idea about how much clearance is between the valves and the piston, i thought i might be ok if i didnt get a cam with much more lift than stock just a bit more duration.


Both those cams are the Ford 200kw and 220kw cams.
Usually if lift figures are around the .500 mark, with 1.6's, adding 1.7's will up lift by about .030".
My 2040(E-303) has .498" for 1.6's, with my 1.7's it makes it .529".
Have you considered that cam? Proofs in the pudding as far as valve clearance goes as i'm using it and 1.7's with std pistons.


Oh, and im sure the AU 175kw cam is worse than the std HO cam, they are absolutely shocking. The missus car sucked with the 175kw, no with the 220kw engine, you can REALLY feel the difference in the cam.

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 11:02 pm 
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Oh so the smaller one is the 220 cam.
I thought about a bigger cam but im keeping the ecu stock and i dont want my trans to die from making too much grunt :( that is my main consideration.(sounds weird but thats me)

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 11:21 pm 
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Go the 621338 with your 1.7's.
That'll be ECU friendly for sure.
If only you had 1.6's, i'd suggest using the Crane 2020.

 

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 Post subject: Re: Camshaft different?
Posted: Wed Sep 16, 2009 11:58 pm 
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Yeah thanks Jeff, i know i would regret using the stock cam fully knowing theres a bit more power to be had :D
I realise that if put a bigger cam in and got it tuned it would make good power(plenty enough to blow my trans) but i spent all my tune money buying the au motor to start with :( good things take time and i can wait.

 

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