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JMM Motorsport DEV 5 Cam or 977b? 

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 7:21 pm 
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nothing wrong with reginds,
on the dudes f/s thread theres a pic

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 7:26 pm 
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TROYMAN wrote:
look at the cam and between the lobes is there a p/n eg.. 94daxxxxx or 94dtxxxxx
if there is anything like that its a re ground cam...

if your not sure post up a few pics of the cam,


Well...that isn't quite true.....I have a billet Crow cam, and it has that on it (94DAXXXXXX).
And, on a Tickford cam, they (Ford) grind the 'A' off and stamp a 'T' in its place......seen it with my own eyes.

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 7:26 pm 
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ef_falcon_95 wrote:
nothing wrong with reginds,
on the dudes f/s thread theres a pic

Pretty sure he's pulled the thread down?

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 7:28 pm 
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SLY EL wrote:
ef_falcon_95 wrote:
nothing wrong with reginds,
on the dudes f/s thread theres a pic

Pretty sure he's pulled the thread down?


he has! couldnt find it in f/s section or search

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 8:04 pm 
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Hmmm. I'm not too worried, but as I said, I don't want to put a re-grind in without shims.

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 8:05 pm 
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no u wouldnt it will be noisy as f**k lol

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Fri Aug 13, 2010 8:16 pm 
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ef_falcon_95 wrote:
no u wouldnt it will be noisy as f**k lol

Speaking to the seller, he doesn't know if it's a billet but guesses it is because he didn't have to use shims. If it was a billet, it wouldn't have the code because it would of been a blank to start off with?

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Sat Aug 14, 2010 1:56 am 
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SLY EL wrote:
ef_falcon_95 wrote:
no u wouldnt it will be noisy as f**k lol

Speaking to the seller, he doesn't know if it's a billet but guesses it is because he didn't have to use shims. If it was a billet, it wouldn't have the code because it would of been a blank to start off with?


thats right.. if it is a billet there will not be a p/n cast on the shaft, but if its a re grind it will have the factory ford p/n cast on the shaft
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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Mon Aug 16, 2010 8:15 pm 
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TROYMAN wrote:
SLY EL wrote:
ef_falcon_95 wrote:
no u wouldnt it will be noisy as f**k lol

Speaking to the seller, he doesn't know if it's a billet but guesses it is because he didn't have to use shims. If it was a billet, it wouldn't have the code because it would of been a blank to start off with?


thats right.. if it is a billet there will not be a p/n cast on the shaft, but if its a re grind it will have the factory ford p/n cast on the shaft


Okay, so it's definitely a re-grind.

I'll need shims. I'm not fussed. But the question stands, 977b, or JMM DEV 5 Cam?

Which one will perform better?

Here is a comparison of the specs;
Profile No: DEV-5

Lobe Lift: IN-263/EX-263

Timing Ad
Open Close:IN-69-20/EX-22-65

Duration @.050: IN-219/EX-219

Valve
Clr: HYD/HYD

Valve
Lift: IN-0.525"/EX-0.525"

Lobe
Sep: 114

Profile:977B

Lobe Lift:
Ex .256
In .256

Timing Ad:
IN:64-20
EX:22-62

Duration @.050:
206
206

Valve
Hyd
Hyd

Valve Lift:
.512
.512

Lobe Sep
112

On those facts;
Which cam is better by the specs stated?


Cheers!

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Mon Aug 16, 2010 8:54 pm 
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Going from those specs the DEV 5 is more streetable.

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Tue Aug 17, 2010 8:40 am 
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lol you posted the specs up.....

The Dev 5 specs are very very similar to the Wade 1521a .......

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Tue Aug 17, 2010 3:54 pm 
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oh! mocks specs are out now! :o ACA will be onto this..

 

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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Mon Feb 21, 2011 2:49 am 
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MRESP8 wrote:
Since when were the JMM Cams billit? All regrinds i thought.


I thought JMM cams were all NEW billets and then custom ground to their secret specs. I also assume they do not ground the base circle down thus no extra shim required. I am sure that Crow Cams and Kelford Cams re-ground EA saloon cars camshafts and do not touch the base circle thus no extra shim required. The specs looked like this

Kelford 1/49 49/1 -14/34 34/-14 230/230 200/200 0.4840 0.4840 114
Crow SCA3900 9/53 55/7 -13/31 33/-15 242/242 198/198 0.4900 0.4900 113

Now since when has anyone seen a cam with adv duration of 230 or 242 deg. I assume that this is the max grind you can get via reshaping the existing lobes and only taking a bit off the base circle.

Compared to the current Wades I believe they take more off the base circle to get a better profile thus needing the extra shim.

Does this make any sense to any one ???
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 Post subject: Re: JMM Motorsport DEV 5 Cam or 977b?
Posted: Mon Feb 21, 2011 9:10 am 
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there are no billet cams & may never be anymore billet cams made for the i6 sohc motors.........there is only ony company in Australia thats trying to get them but I was told there may be some issues with this, plus the fact that the demand or volume isnt there so its still an unknown thing.....

just to let you know that my stage 3 is bigger than both of them anyway....
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