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

would 24lb or 30lb injectors be better for my set up?

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Old Apr 18, 2010 | 02:54 AM
  #1  
MurfGT00's Avatar
MurfGT00
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From: Rhode Island
Default would 24lb or 30lb injectors be better for my set up?

just paid to get my engine back, it's going in this week, it's bored .020 with comp cams ex270ah cams full valve job, shorty headers, 3.73 gears, slp catted x and loudmouth II's, cai with 70mm throttle body and plenum... just wondering what other people with similar setups have used for injectors looking to get 24lb/min but also playing around with the thought of 30lb... i'm not thinking about future mods just looking for what's best for my car as is. and also would there be any point in getting a 90mm mass air flow or am i not going to flow enough for it to come into effect? thanks for the help.
Old Apr 18, 2010 | 03:02 AM
  #2  
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Kerns
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Stock MAF is enough same with stock injectors.
Old Apr 18, 2010 | 03:10 AM
  #3  
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0949er
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got the exact same setup + some and have 21lb ers that are more then enough
Old Apr 18, 2010 | 07:56 AM
  #4  
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mrtstang
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If it were me i'd do the 30's (just in case you change your mind later, and want a little more power). Besides, you have to retune the car anyway, so why not make the jump to the 30's. I've heard of some occasions where 24's have been maxed out with a HCI setup. I don't think that would happen in your case, but better safe than sorry.The stock MAF will be fine.
Old Apr 18, 2010 | 08:45 AM
  #5  
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Mustang_NTriangle
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i got a set of 38 lb injectors for sale if you are interested just pm me. Then you will be good to go with FI or nitous in the future.
Old Apr 18, 2010 | 08:49 AM
  #6  
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kugzgt
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ehhh id stick with the stockers for now unless ur doin fi
Old Apr 18, 2010 | 09:18 AM
  #7  
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cliffyk
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The stock injectors (orange) for a 2000 MY are only 19lb/h capacity, and barely adequate for stock power levels (running 85% to 90%+ duty cycle at high revs and WOT), that's why Ford put 21lb/h units (lavender) in starting in mid 2002.

I'd find a set of 21s, or go with 24s. The stock MAF is fine up to 435fwHP or so running n/a...
Old Apr 20, 2010 | 04:58 PM
  #8  
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MurfGT00
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thanks for all the help guys... should be ordering some injectors tonight, hoping to get the motor at least back in the car tomorrow.
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