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Home made Intake pipe. 

 

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Posted: Mon May 07, 2007 8:39 pm 
Getting Side Ways
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keep it up mongoose. im ment to be doin yr 12 but craked under the pressure. but go as far as u can aslong as you enjoy it
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Posted: Mon May 07, 2007 8:58 pm 
Stock as a Rock
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^ What he said mongoose.

Actually if you want to take it one step further, (all things being equal).
you can actually prove that if the temp increases about 30 degrees there is 10 percent less air going into the engine. pm me if you want equations :P

That is basically the principal behind the cold air intake, however there are many more factors which ultimately dictate the resulting air flow.

*But most of the time they forget to mention that.
Its called psuedo science (I was never good at english though :().
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Posted: Mon May 07, 2007 9:18 pm 
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Yes, alumnium is bad because of heat. Aluminium conducts heat around 400x more than plastic, and around 13X more than stainless steel. The only commonly available metal that would be worse for a NA intake pipe is copper.

Not that it is going to make a massive difference, but it doesnt take much of a temperature increase to cost a few hp.

 

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Posted: Mon May 07, 2007 9:18 pm 
Getting Side Ways
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haha... trying to outdo me? lol :lol: I'm enjoying it so far... it's hard but I just look forward to the mega dollars I'll be making after Uni :D That keeps me going through the stressful times... My bro walked out of Uni and straight into a $100k/year mining engineering job 8-) He had a TER of 74.2 :D That's my plan...
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Posted: Mon May 07, 2007 9:22 pm 
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stockstandard wrote:
The only commonly available metal that would be worse for a NA intake pipe is copper.


Probably the worst... Not to mention the amount that it expands when heated... My dad, back in the day, once built an entire exhaust system out of copper, mufflers and all... Drove from Two Wells to Mallala for a race and arrived to find his exhaust dragging on the ground from it expanding so much :lol: lol...
Back then they didn't teach simple metal expansion crap in school so he didn't know any wiser
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Posted: Mon May 07, 2007 9:27 pm 
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If your worried about heat soak on metal induction, just buy some heat wrap... I put it on mine and it works a treat...

 

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Posted: Mon May 07, 2007 9:34 pm 
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HSVETAR wrote:
If your worried about heat soak on metal induction, just buy some heat wrap... I put it on mine and it works a treat...


Yeh... The real true horsepower seekers with turbos wrap all their pipe work in heat wrap to help prevent heat absorption. Doesn't look very pretty but it works extremely well.
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Posted: Mon May 07, 2007 9:59 pm 
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OK you need two 180* mandrell bends and two 300mm straight sections I got mine from Super Cheap as intercooler pipe. Section A is one full 180* piece, sections D,F and the one I missed out the 22.5* all get cut out of the second 180* piece. Section E,B and C are out of the 300mm straight sections. Im sure you could buy these pipes in mild steel and stainless if you are concerned about the heat transfer issue. You will need to get the ends, F and the 22.5* pieces flanged to 78/80mm any exhaust shop can do it.
The four pieces of pipe cost $120, Welding cost $40, clamps and joiner cost $19.

 

 

Attachments:
Intake MeasurementsCopy.jpg
Intake MeasurementsCopy.jpg [ 253.04 KiB | Viewed 62 times ]

 

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4.0L EF Fairmont Station Wagon. EL GT Snorkel. K&N Pod in air box. 3" Intake piping.
Home port job. 1636 Wade cam. Wildcat Extractors, 2 1/2" cat and exhaust.
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Posted: Mon May 07, 2007 10:01 pm 
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Thats awesome man... Good work! Sadly, I can get one made up at my exhaust place in stainless steel for $100
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 Post subject: thats cool
Posted: Tue May 08, 2007 9:15 pm 
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that looks nice mate.how long did it take you mate do that wounderful job.stef :D

 

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Posted: Wed May 09, 2007 12:14 am 
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Hey stef, I did it over acouple of weeks a bit here and a bit there but I suppose in all four to five hours. Longest time was spent grinding back the weld's, sanding and polishing. Even though it looks good I'm seriously considering heat wraping it.

 

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4.0L EF Fairmont Station Wagon. EL GT Snorkel. K&N Pod in air box. 3" Intake piping.
Home port job. 1636 Wade cam. Wildcat Extractors, 2 1/2" cat and exhaust.
2200/2400rpm Dominator More Stall. Stage two mechanical shift kit. 3.73 4 pinion LSD. 15.078 @ 92mph.

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