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did a search, what is optimal comp ratio for blower? 8-10psi

  • Thread starter Thread starter IndyBlk5.0
  • Start date Start date Jul 29, 2004

IndyBlk5.0

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Nov 24, 2003
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New Whiteland, IN
Jul 29, 2004
#1
  • Jul 29, 2004
  • #1
I need to know this, i'm trying to get all my parts lined up.
Would 8.6/8.7:1 be too high of compression if i plan on 450rwhp? out of an s trim?
 

Rick 91GT

Mustang Master
Nov 29, 1999
9,692
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Jul 29, 2004
#2
  • Jul 29, 2004
  • #2
NO I would say anything up to 9.5:1 would be good...
 

IndyBlk5.0

New Member
Nov 24, 2003
1,122
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New Whiteland, IN
Jul 29, 2004
#3
  • Jul 29, 2004
  • #3
I want to run pump gas, so im thinking 8.3/8.4:1 with 10 psi of boost, should be about right for pump gas.
 

IndyBlk5.0

New Member
Nov 24, 2003
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New Whiteland, IN
Jul 29, 2004
#4
  • Jul 29, 2004
  • #4
Any other opinions?
 

Rick 91GT

Mustang Master
Nov 29, 1999
9,692
95
99
PA
Jul 29, 2004
#5
  • Jul 29, 2004
  • #5
We were running 9.5:1 on cast GT ro head, 10psi combo that made 465/425 to the wheels, pump gas, 36# inj, No FMU, 255 hi pressure pump, ATI inline.

Personally there is no reason to go 8.5:1 on your combo unless you plan to push 20psi, I'd go 9:1.
 

88stangmangt

Active Member
Nov 25, 2003
2,332
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Stafford,VA
Jul 29, 2004
#6
  • Jul 29, 2004
  • #6
cant argue with that^^^^^^^^^^ i am gonna run stock compression with some dss pro pistons and either afr185's or thumper heads......i would like to see low to mid 500's with my combo.
 

RydeOn

Licensed to Chill
Founding Member
Sep 26, 2000
6,273
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orange county, CA
Jul 29, 2004
#7
  • Jul 29, 2004
  • #7
Rick 91GT said:
I'd go 9:1.
Click to expand...
Exactly what I was gonna type until I read ahead. 9.1:1 it is.
 

IndyBlk5.0

New Member
Nov 24, 2003
1,122
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0
New Whiteland, IN
Jul 29, 2004
#8
  • Jul 29, 2004
  • #8
okay i'll do 8.7/8.8, no more.
 
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