4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

compression vs boost

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Old 01-10-2012, 10:13 AM
  #31  
sn95_331_GT_ yellow
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Originally Posted by 97stanger
Will do! I'm shooting for end of march/beginning of April. How far are you from dezs shop? I'm about 5 hours, but I'll be trail print the car
Maybe 2 his or so...

If you want we should take the half hour or so cruise down to wareham and go check out factory five, Dave and Mark are really chill guys and still get giddy over nice Mustangs. I'm sure they'll take done pictures of our cars and our them up
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Old 01-10-2012, 10:19 AM
  #32  
sn95_331_GT_ yellow
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I swear to God this auto correct is going to make me slap somebody...
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Old 01-10-2012, 07:37 PM
  #33  
97stanger
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Originally Posted by sn95_331_GT_ yellow
Maybe 2 his or so...

If you want we should take the half hour or so cruise down to wareham and go check out factory five, Dave and Mark are really chill guys and still get giddy over nice Mustangs. I'm sure they'll take done pictures of our cars and our them up
Id definitely be down for that! I'll be in touch when the time gets a little closer and I officially have a date set in the books with Dez, would be awesome to meet up
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Old 01-11-2012, 01:10 AM
  #34  
justinschmidt1
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Boost is all a measure of restriction...

I think your fine as long as the tune is right and you have an intercooler to keep the IATs down.
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Old 01-11-2012, 03:20 PM
  #35  
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OP you are looking to go turbo correct? If so CR is less of a factor on turbo and centri blower as they don't start making higher boost levels until further in the RPM range. A roots blower can become a detonation problem when it is making significant boost at lower rpms. Basicly if you are making decent boost levels when the motor would normally be "bogged down, or lugging" at low rpm that is where prbolems begin.

The same applies for nitrous which is why most people recommend a window switch set to 3,000-3,500 rpm, any lower and the engine is really loaded down and things go boom.

However if you are planning on making 20+ lbs then you need to lower the compression as the boost curve is much more aggressive to get to 20 lbs at the top of the rpm range.
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