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HM Headers vs Pacemaker's 

 

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 Post subject: HM Headers vs Pacemaker's
Posted: Thu Sep 11, 2008 9:40 pm 
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Was given an offer yesterday to buy a set of brand new stainless steel HM headers (p/n - hm103ss) for well under the RRP

http://www.hmheaders.com.au/products/index.php?action=view&productid=12

problem is i really wanted the ceramic coated pacemaker ph4001 tri-y

http://pacemaker.com.au/ford_falcon_v8_eb-au.html

the measurements of the pacies are listed on their website but the only thing listed on the hm site is the size of the outlet (2 1/4") which is the same on both parts.

does anyone know the diameters of the hm headers compared to that of the pacies?

is anyone running the hm header and are you happy with them?

is it worth the extra cash for the pacemaker's

both products have their pros' and con's

HM

Pro - interchangeable between both HO and GT40p heads
- price

Con - Measurements unknown
- not ceramic coated

pacemaker

Pro - ceramic coated
- general consensus from people i talk to with them is that they work and are worth the cash

Con - price
- only suited for the gt40 style heads


At this current point in time the engine is standard with original HO Heads and manifold with the exception of an au 65mm t/b(which is why the hm headers are more appealing ATM)but i do have the complete top end from a 220kw motor that is waiting to go on when i get the cash to freshen up the bottom end.

any help/thoughts are very much appreciated

cheers

 

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Posted: Thu Sep 11, 2008 10:15 pm 
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difference between ph4000 and ph4001 are the spark plug boots angles. Both extractors are the same, and both will fit onto E7 and gt40p's. Get the ph4000 now and when you swap your heads get the spark plug boots to suit.
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Posted: Thu Sep 11, 2008 10:31 pm 
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EB-5LTR wrote:
difference between ph4000 and ph4001 are the spark plug boots angles. Both extractors are the same, and both will fit onto E7 and gt40p's. Get the ph4000 now and when you swap your heads get the spark plug boots to suit.


so are you saying the pacemakers are the way to go

also with the ignition leads would having the correct angled boot require them to be custom made or are they an off the shelf item

cheers for the reply

 

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Posted: Thu Sep 11, 2008 11:02 pm 
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You can get the angled boots of the shelf.

 

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Posted: Fri Sep 12, 2008 12:09 am 
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PH4001 are the AU part number, I always thought they were entirely different to get around the steering arm??
If they're not, will the PH4006s fit an E-Series???

 

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Posted: Fri Sep 12, 2008 12:40 am 
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I was amazed how easy it was to fit pacemakers to my wagon. Very easy job!

 

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Posted: Fri Sep 12, 2008 12:12 pm 
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Yes go the Paccies, I got PH4000 on my EB.

 

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Posted: Fri Sep 12, 2008 7:11 pm 
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Yes PH4001 and PH4006 are for AU and i belive there is clearance issues against steering arm on an e-series.

Im running PH4000's on my ute and no complaints here. Then again i have never seen or used HM headers on a windsor.

 

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Posted: Fri Sep 12, 2008 8:25 pm 
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also running PH4006 and their a great extractor was recommended them over the tri y's (PH4001's) for more top end power.
and the only ones listed for E-series are the PH4000's with tri-y so u dont have much choice i guess!

 

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Posted: Sun Sep 14, 2008 8:39 pm 
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yeah thats what I thought, cheers boys.
defilippos it is.

 

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Posted: Sun Sep 14, 2008 9:21 pm 
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XH5LWEPN wrote:
Yes PH4001 and PH4006 are for AU and i belive there is clearance issues against steering arm on an e-series.

Im running PH4000's on my ute and no complaints here. Then again i have never seen or used HM headers on a windsor.


so the ph4000's will bolt up to the gt40p heads no probs???

 

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Posted: Sun Sep 14, 2008 10:31 pm 
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nannas_ed wrote:
so the ph4000's will bolt up to the gt40p heads no probs???


That i cannot answer from experience.
I think they do but have also heard some people say they needed 90 degree spark plug lead boots.
Im sure they cant be that much hassle.

 

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Posted: Mon Sep 15, 2008 12:56 pm 
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PH4000 do bolt up to GT40P & yes you need 90 deg boots & #5 plug will be a b**ch to get to.

Richie

 

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Posted: Mon Sep 15, 2008 2:34 pm 
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richie wrote:
PH4000 do bolt up to GT40P & yes you need 90 deg boots & #5 plug will be a b**ch to get to.

Richie

Spot on.
I don't know anything about HM's headers for the Windsor but I do know that the PH4000's are a great design for helping low to mid range area which is what I like the most, lots of torque down low.
The 90° boots are required for at least a few plugs as they are a very tight fit.
I have done that and left 45° boots on the remaining plugs as they had heaps of clearance. I also have kevlar sleeves fitted over the top of the 90° boots as added protection - money well spent in my opinion.

 

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