4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

maximum cubic inch

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Old 03-05-2007, 03:36 AM
  #11  
CobraStangGT16
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Default RE: maximum cubic inch

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Yeah the motor in my dad's Shelby Cobra is a 351W bored out to 392cid. He's making at least 420rwhp N/A. But then again, the car weighs under 2000lbs and the driveshaft is only 1.5 ft long!

I'm not sure what the liters are on a 392cid? Anybody know? I know the 351w is a 5.8L.
Pushrod>modular. Not a comparison.


Hmm...didn't think about that. I always thought Modulars were better performers than pushrod motors? Just because they are newer, I guess. [&:]
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Old 03-05-2007, 03:39 AM
  #12  
ZW99GT
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Yeah the motor in my dad's Shelby Cobra is a 351W bored out to 392cid. He's making at least 420rwhp N/A. But then again, the car weighs under 2000lbs and the driveshaft is only 1.5 ft long!

I'm not sure what the liters are on a 392cid? Anybody know? I know the 351w is a 5.8L.
Pushrod>modular. Not a comparison.


Hmm...didn't think about that. I always thought Modulars were better performers than pushrod motors? Just because they are newer, I guess. [&:]

lol. Thats crazy talk[8D]. Pushrods FTW.

Newer means more crappy emissions control. lol
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Old 03-05-2007, 03:44 AM
  #13  
2000GT4.6
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Default RE: maximum cubic inch

The only real disadvantage a modular has compared to a pushrod is the complete lack of availblity of a true aftermarket head.

If your talking about doing a big CI 5.4L based setup I might think again. To make it really make since you will be needing to shoot for BIG numbers, which means a TON of money into everything else (plus the engine).

Theres simply no need unless you want to make say 700+ WHP. Anything before that and a much more cost effective stock displacement 4.6L will still do the job.
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Old 03-05-2007, 04:34 AM
  #14  
97targa
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Default RE: maximum cubic inch

ORIGINAL: CobraStangGT16

Yeah the motor in my dad's Shelby Cobra is a 351W bored out to 392cid. He's making at least 420rwhp N/A. But then again, the car weighs under 2000lbs and the driveshaft is only 1.5 ft long!

I'm not sure what the liters are on a 392cid? Anybody know? I know the 351w is a 5.8L.
Most positive the 392 is a 6.0L
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Old 03-06-2007, 02:12 AM
  #15  
Clif Brohn
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Default RE: maximum cubic inch

ORIGINAL: 97targa

ORIGINAL: CobraStangGT16

Yeah the motor in my dad's Shelby Cobra is a 351W bored out to 392cid. He's making at least 420rwhp N/A. But then again, the car weighs under 2000lbs and the driveshaft is only 1.5 ft long!

I'm not sure what the liters are on a 392cid? Anybody know? I know the 351w is a 5.8L.
Most positive the 392 is a 6.0L
Nah, GMs 6.0L LS2 is 364ci, and Chrysler's SRT-8 6.1L HEMI is 370ci, so I'd say that 392ci is right around 6.4L-6.5L

Either way, the Ford GT/GT500's new cylinder heads are outstanding, so making big numbers with the 5.4L V8s is no problem now. I believe JLP is gonna be making conversion kits for those who want 4v heads on their Lightnings.
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Old 03-06-2007, 02:16 AM
  #16  
racer02GTstang
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Default RE: maximum cubic inch

now i wish i got a 5.4 swap instead of my forged 4.6... just need more boost to make up for it. lol
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Old 03-06-2007, 02:36 AM
  #17  
trustmeitsstock
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I was looking more towards 800 hp na 660 ft lbs torque. it can be done. N/A of couse
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Old 03-06-2007, 02:40 AM
  #18  
racer02GTstang
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800hp n/a wont be streetable.... how 800 hp with like 6-- torque? most n/a v8's will make more torque than hp... but i can see it making 500hp n/a... you will have the internals and such too that you can run a 200 plus shot of nitrous if you really want more power...
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Old 03-06-2007, 02:49 AM
  #19  
ponysnake99
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i doubt your going to get that kind of power on pump gas, and with the dimensions of that engine, your going to look more at 600 hp and 800 ft-lbs (thats not literal, but your going to have torque out the ying yang with a bore:stroke ratio of < 1
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Old 03-06-2007, 02:57 AM
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97targa
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Default RE: maximum cubic inch

ORIGINAL: Clif Brohn

ORIGINAL: 97targa

ORIGINAL: CobraStangGT16

Yeah the motor in my dad's Shelby Cobra is a 351W bored out to 392cid. He's making at least 420rwhp N/A. But then again, the car weighs under 2000lbs and the driveshaft is only 1.5 ft long!

I'm not sure what the liters are on a 392cid? Anybody know? I know the 351w is a 5.8L.
Most positive the 392 is a 6.0L
Nah, GMs 6.0L LS2 is 364ci, and Chrysler's SRT-8 6.1L HEMI is 370ci, so I'd say that 392ci is right around 6.4L-6.5L

Either way, the Ford GT/GT500's new cylinder heads are outstanding, so making big numbers with the 5.4L V8s is no problem now. I believe JLP is gonna be making conversion kits for those who want 4v heads on their Lightnings.
GOOGLE 392 and you'll come up with two diff. liters 6.0 and 6.2
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