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Heads

Old Oct 21, 2007 | 09:33 PM
  #11  
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lol, well what about performance exhaust's, or manifolds? They will help a lot wont they, a lot more than a port job......im actually looking for low end toruq, i am going to be doing road rallys with it.
 
Old Oct 21, 2007 | 09:50 PM
  #12  
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you need to educate yourself on flow characteristics. if it's low end torque you're after, increasing and/or smoothing outthe flow of your cylinder head(s) is going to be counterproductive towards that cause.
 
Old Oct 21, 2007 | 09:51 PM
  #13  
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custom fab a supercharger, its easier then what people make it out to be, yet it isnt simple by anymeans. motodyne makes a kit but its liek 6 grand and i;ve heard they arent fun to deal with. im in the process of this myself, havnt made a post about it, because everyone just flames about it. i've made mounting brakets, oil feed lines, aluminum intakes to replace the stock plastic. its doable, but you gota know that you can make more hp for less $ with a 1.8.

i guess for low end nitrous wouldnt really be your thing, so..? you could do underdrive pullys, there around 300-400$, but have promises of around 15 hp.


[hr]

nitrous could still work for you, computerize the output of the nitrous for certain rpm's. so you'll get an extra 50 hp or so over 35 hudred or 4 grand.
ehhhh, thats all i got.
 
Old Oct 21, 2007 | 09:55 PM
  #14  
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Underdrive pully isn't going to add much either.
 
Old Oct 21, 2007 | 09:59 PM
  #15  
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ok, cool, thanks Oneg
 
Old Oct 21, 2007 | 10:10 PM
  #16  
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oneG, that NOS kit on yet or are you still in trouble?
 
Old Oct 21, 2007 | 10:14 PM
  #17  
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Default RE: Heads

Honestly, on a naturally aspirated engine, especially a modern one, you're just not going to gain much from breathing mods. About the only thing you can do (and keep it naturally aspirated, and off the spray) would be to have a proven race shop balance and blueprint the engine. In mass production, there are fairly wide tolerance ranges that the engine will fall victim to. It'll still make more or less the advertised power, but there is still quite a bit locked up in there. Having a real balance-and-blueprint done is very expensive and time consuming (think several thousand dollars and probably for most shops, a month or more of downtime), but it can free up 15-20% more power from your engine. However, given the fact that it's a street car, not a track car, this is almost ridiculously foolish to do, unless you have a ton of money that you have absolutely no use for, and a burning need to be completely different than everyone else in your choice of car. Sticking with bolt-on mods, you're gonna be spending still a lot of money between intake, exhaust, UD pulley, portwork, cams, and headers (if you can even find them), and would probably gain 25 or 30 hp after extensively dyno-tuning the new setup and having a custom chip burned for your ECU to take advantage of all the work. It's just not worth it. Fab the supercharger, or get nitrous. Or sell the car and get one that's more mod-friendly.
 
Old Oct 21, 2007 | 10:42 PM
  #18  
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Their actualy a lot that mods can do UpstateNYA4, on my mustang I put high performance 170c heads on it and the heads alone gave me 100hp, it really depends on how much money you are willing to spend.
 
Old Oct 21, 2007 | 10:44 PM
  #19  
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But i wont be using any spray, im not too big of a fan on that stuff.
 
Old Oct 21, 2007 | 11:27 PM
  #20  
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ORIGINAL: Bogie

oneG, that NOS kit on yet or are you still in trouble?
keep putting it off, well haven't finished. and i want to get the exhaust done at the same time, waiting for a spare day.

im kinda starting a new project too. joe's probably told you about the smashed 2.8 i went to look at. so im trying to fit alot into my free time.
 

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