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

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Old 04-22-2012, 09:36 PM   #21
ctgreddy
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good to hear soldier! cant wait to see it done. so what are you doing for the retune, just gonna up the boost a tad and add the headers? you should invest in a set of cams man(while it's all out anyways). I'll make you a good deal on my mhs's with the springs and intake valves necessary to run them if you've got any cash left over!
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'03 cobra- 2.8 KB mammoth, 19lbs, bolt ons, rxt clutch, sra w/ 3.73's

654/546 whp/tq

Old setup - Ported eaton, 16lbs, minor bolt ons, sra, self tuned.

501/501 - 11.23@124
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Old 04-23-2012, 07:08 AM   #22
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Looking forward to seeing this beast done Soldier!!
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389 rwhp and 378 rwtq
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Old 04-23-2012, 09:49 AM   #23
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Very nice, i better be seeing this at the all ford nationals in carlisle
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Old 04-23-2012, 10:50 AM   #24
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That's gonna be alot of compression for boost.
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Old 04-23-2012, 12:01 PM   #25
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Congrats!!! It's going to be a beast of a PONY this time around..3rd time will be a charm

GL S.GT
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Old 04-23-2012, 12:35 PM   #26
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Quote:
Originally Posted by oxfordgt View Post
That's gonna be alot of compression for boost.
That's what I thought too.
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Old 04-23-2012, 04:47 PM   #27
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I have been doing a lot of research. Guys are having tons of luck with 9.8-10:1 CR with boost

http://www.svtperformance.com/forums...on-centri.html
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Old 04-23-2012, 04:50 PM   #28
ctgreddy
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10:1 compression with boost is nothing nowadays. My one buddies car has 10.2:1 with 14lbs thru an f1r on pump gas. and look at all the new 5.0's, they're 11:1 and doing excellent with a decent amount of boost.
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'03 cobra- 2.8 KB mammoth, 19lbs, bolt ons, rxt clutch, sra w/ 3.73's

654/546 whp/tq

Old setup - Ported eaton, 16lbs, minor bolt ons, sra, self tuned.

501/501 - 11.23@124
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Old 04-23-2012, 04:51 PM   #29
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Over on svt there are tons of guys running 10:1 CR or higher on 93 octane fuel and putting out good numbers
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Old 04-23-2012, 04:57 PM   #30
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You're also talking about good flowing 4v heads not craptastic 2v heads. The better the heads flow the easier it is for an engine to make power safely. Why do you think 05-08 mustangs can make 500rwhp safely with the exact same short block as 96-04 that are limited to 450.

With his stock heads he will be very limited on his power because of the CR. Plus you can make more power with less compression and more boost then you can with more compression and less boost.
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Old 04-23-2012, 04:57 PM
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