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Poll: 1st mod: Cam or Extractors (no other mods) 

 

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 Post subject: Poll: 1st mod: Cam or Extractors (no other mods)
Posted: Thu Jan 25, 2007 12:03 am 
Getting Side Ways
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I would go extractors, what would you recommend?

 

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Posted: Thu Jan 25, 2007 12:24 am 
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cat back exhaust, is usually done before both of those mods.

BUT if i had to pick idd do.... not sure... it seems illogical

 

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Posted: Thu Jan 25, 2007 12:27 am 
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like rushed said, exhaust
but if not that...
extractors?

 

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Posted: Thu Jan 25, 2007 12:53 am 
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You won't benefit fromt he cam if the engine is still struggling to exhale, so the obvious way to be would be extractors/exhaust first.
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Posted: Thu Jan 25, 2007 1:07 am 
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^ what he said. by adding more gasses to the equation, the log manifold can't deal with the cam over lap and the pressure will build up. pritty much, you may only get 60% of what the cam could give without the zorst.

plus, the extractors are the start of it. the standard exhaust has too many log jams and bottlenecks (size, bends, cat) remember there is a 3 inch pipe of cold air going in the motor and a 2 and a bit inch pipe venting hot gas of a greater volume. you could leave the cat and just go the stractors and zorst at this stage and still pick up a noticable kw increase

 

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Posted: Thu Jan 25, 2007 2:30 am 
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what would i be expecting before and after an exhaust and extractor upgrade (in kw at the wheels)

 

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Posted: Thu Jan 25, 2007 8:45 am 
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Do exhaust and extractors at the same time.
About $1000 for Pacemakers and 2.5" exhaust with chrome oval tip. If you want one hell tough sounding exhaust only get them to put the centre muffler in and no hotdogs or other mufflers. I guarantee it will sound like a V8. 10-15kw gain.

 

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Posted: Thu Jan 25, 2007 9:44 am 
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Are Lukey or HM Headers extractors good? Which are better? As I might be able to get a discount on em at work.

 

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Posted: Thu Jan 25, 2007 9:50 am 
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http://www.hmheaders.com.au/products/in ... oductid=25

http://www.hmheaders.com.au/products/in ... oductid=27

http://www.hmheaders.com.au/products/in ... roductid=5

Im thinking the HM109SS as it offers lower end torque and that is exactly what I want

 

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Posted: Thu Jan 25, 2007 10:46 am 
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i was thinkin the same which mod first cam or exhaust...i ended up hooking up a mates slightly used 2 1/2 inch and some PH4499s so i guess exhaust first... but cam will be second.. or diff :S.. as for those headers id go the HM109SS aswell
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Posted: Thu Jan 25, 2007 10:46 am 
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Timmeh wrote:
Do exhaust and extractors at the same time.
About $1000 for Pacemakers and 2.5" exhaust with chrome oval tip. If you want one hell tough sounding exhaust only get them to put the centre muffler in and no hotdogs or other mufflers. I guarantee it will sound like a V8. 10-15kw gain.


I can vouch for that 10-15kw gain. It's basically what I got when I had my headers and exhaust fitted.

Don't know about it sounding like a V8 though...sounds like a hot 6 to me...then again, one of my mates commented that it was disappointing because it sounded like a V8 (he is a 6 fiend)...
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Posted: Thu Jan 25, 2007 10:48 am 
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downingj wrote:
Don't know about it sounding like a V8 though...sounds like a hot 6 to me...then again, one of my mates commented that it was disappointing because it sounded like a V8 (he is a 6 fiend)...

my mate has a VQ stato with exhaust, my bro has a EL fairmont.. 2 1/2 inch cat back single muff.. and when he rocked up at my house i was sure that it was my mate..open the curtan it the EL Fairmont... i suprised myself
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Posted: Thu Jan 25, 2007 4:17 pm 
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when i got my exhaust i made sure to request the sound i was after (rasspy SIX) i DID NOT want it to sound like an 8, if you want your car to sound like an 8 buy an 8.

as for headers make sure you plan what you do there, i bought headers suited to high rpm, and a high rpm cam, lets just say that SUCKS with an auto, but should be great with the manual.

btw, my exhaust is an 7rwkw loss to having open headers (tested same hour, same dyno,same headers),

 

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Posted: Thu Jan 25, 2007 5:36 pm 
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im goin with zorst, xtractors then cam

 

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Posted: Thu Jan 25, 2007 6:55 pm 
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If you can only do one for now and have to wait till later to do the other then do the CAM FIRST - all this stuff about HAVING to do the exhaust first is s**t - you will feel precisely...... f**k all by just doing the exhaust - but if you just do the cam straight up then you will notice a definite improvement. There is absolutely no doubt you will not be getting the best out of your new cam until you also do the exhaust - especially toward the top end, but you will be getting something out of it straight away and this you will FEEL.

And as far as doing the exhaust - do the cat back first, THEN the extractors later - it's the same sort of thing - you'll get much better benefit straight up and then can build on this later by doing the extractors.

 

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