5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Turbo and CR

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Old 05-18-2007, 01:04 AM
  #1  
94StinkinLincoln
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Default Turbo and CR

it will have between 10.0:1 and 10.4:1 CR. Dyno 2000 says 10.22:1
i thought about forced induction later on and max boost would be at like 10psi so i dont cross that 550bhp level. n/a the 331 should put out about 450bhp. i would need larger than 30lb inj. correct? im pretty sure ill need like 42's.
what would i need to do in order to run a turbo on my motor?
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Old 05-18-2007, 01:07 AM
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my77stang
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Default RE: Turbo and CR

your compression is gonna be quite high if your starting at 10:1 but i'll be damned if i know how high it would actually be
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Old 05-18-2007, 01:07 AM
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Default RE: Turbo and CR

10:1 is very high for boost... you want to be around 9:1
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Old 05-18-2007, 01:18 AM
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94StinkinLincoln
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Default RE: Turbo and CR

yeah i kno. i originally planned to stay n/a and the hp bug got me LOL then i say speed tv do a thing on banks and turbo's and i was like damnit let me find out what it will take to turbo my car b/c of that damn cr!
i drove my moms 05' f250 the other day and that turbo sound and kick in the seat drove me insane!!!!!
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Old 05-18-2007, 01:20 AM
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AdderMk2
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Default RE: Turbo and CR

get a large dish piston and big chamber heads... thatll drop the CR
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Old 05-18-2007, 01:32 AM
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94StinkinLincoln
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Default RE: Turbo and CR

yeah i kno that, but i already have the pistons in the block and almost have the whole motor put together. and i already got the heads and all that put on. too late for this build lol.
ok heres a question for you yal, what would i have to do extra that i would not have to do with an oem block if i got a 302 type block to hold say 800hp? like a dart or something? im just curious...for the next project im wanting to make more power and i like the 302 style b/c i can get away with telling people its just a 302 and its really a 331 or something.
just wondering what would have to be done diff. to an aftermarket block?
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Old 05-18-2007, 01:45 AM
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Default RE: Turbo and CR

ORIGINAL: 94StinkinLincoln

yeah i kno that, but i already have the pistons in the block and almost have the whole motor put together. and i already got the heads and all that put on. too late for this build lol.
ok heres a question for you yal, what would i have to do extra that i would not have to do with an oem block if i got a 302 type block to hold say 800hp? like a dart or something? im just curious...for the next project im wanting to make more power and i like the 302 style b/c i can get away with telling people its just a 302 and its really a 331 or something.
just wondering what would have to be done diff. to an aftermarket block?
If you have to ask, you dont have what it takes to get there... Its alot of money, and even more knowledge of what NOT to do
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Old 05-18-2007, 01:49 AM
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94StinkinLincoln
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Default RE: Turbo and CR

well the only way to find out is to ask. all i want to do is boost my 331 but i cant b/c of the block integrity and cr. so i thought i could go aftermarket. yes i kno its $$$ but i can save up a while for it. its just an idea im throwing around so i thought i would ask.
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Old 05-18-2007, 01:50 AM
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Scout2232
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Default RE: Turbo and CR

You can get a custom gound camshaft with more overlap. It will 'bleed' off compression. I have 10:1 pistons in my car, but with my cam overlap it drops the compression all the way down to 9.31. You should check out this calculator. It's good info. http://www.rbracing-rsr.com/comprAdvHD.htm
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Old 05-18-2007, 02:03 AM
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94StinkinLincoln
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Default RE: Turbo and CR

ok im not sure what my static cr is b/c i dont have the figure of the piston deck height. from what i remembered it was dang close to flush just by the naked eye but that means nothing in very small amounts.
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