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Old May 12, 2010 | 05:51 PM
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stock vs. interceptor

i have the opportunity to grab a 4.6 interceptor motor and all the computers and stuff outa a crown vic. whats the difference between a stock 4.6 and the interceptor 4.6?
 
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Old May 12, 2010 | 06:22 PM
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Originally Posted by 93 mix 'n match
i have the opportunity to grab a 4.6 interceptor motor and all the computers and stuff outa a crown vic. whats the difference between a stock 4.6 and the interceptor 4.6?
Absolutely nothing whatsoever. All of the differences are simply in a different PCM program for Police service.
JL
 
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Old May 12, 2010 | 09:06 PM
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so basically its just a police tune?
 
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Old May 12, 2010 | 09:29 PM
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Originally Posted by 93 mix 'n match
so basically its just a police tune?
Yes,that is all.
JL
 
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Old May 13, 2010 | 03:15 AM
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mmmmmmhhmm asked a buddy who's a county police mekanik 'bout the same thing . he said they have a more aggressive fuel and ignition program and do not have any limiters so they scream till they go BOOM !!!!!!!!!!!!!!
 
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Old May 13, 2010 | 05:27 AM
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so instead of getting a tune, could i swap something out of the cop car into my truck to get that tune? sorry im new to this newfangled car computer stuff
 
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Old May 13, 2010 | 07:01 AM
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Originally Posted by 55 f350
mmmmmmhhmm asked a buddy who's a county police mekanik 'bout the same thing . he said they have a more aggressive fuel and ignition program and do not have any limiters so they scream till they go BOOM !!!!!!!!!!!!!!
And he's wrong. There are still limiters in place for RPM, and even for speed.
JL
 
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Old May 13, 2010 | 07:02 AM
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Originally Posted by 93 mix 'n match
so instead of getting a tune, could i swap something out of the cop car into my truck to get that tune? sorry im new to this newfangled car computer stuff
No. Crown Vics use a totally different PCM and the programming is nowhere even near compatible. Go get a custom tune,and be done with it. Even the Police tunes can be drastically improved upon by the aftermarket.
JL
 
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Old May 15, 2010 | 07:30 PM
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hhhhmmmmmmmm i wonder howz come some of these young yahoo's they got as deputies keep blowing 'em up then .................................. with a limitor you wouldn't think they could ............................... unless they're doing something diff with them here ?:confused ::confused :
 
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Old May 16, 2010 | 10:59 AM
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They are speed limited to 123 and 129mph IIRC due primarily to the driveline, two different speeds for the two different rear gears available 3.55 and 3.73. Since they are all automatics they are also rev limited if nothing else purely based on the speed limiter but they are definitely rev limited in any gear. No manufacturer in their right mind is going to make an engine that you can simply "blow up" by over reving it due to now limiter.

I am fascinated by the misunderstanding of CVPI's. On the power train side they are crownvics with a different tune, dual exhuast and lower rear gears. The real differences are in some of the suspension and all the interior modifications.
 
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Old May 16, 2010 | 11:51 AM
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Originally Posted by galaxie641

I am fascinated by the misunderstanding of CVPI's.
because the old style(60's & 70's) police interceptors had actual engine differences.

i know alot about the older style trucks and cars, but im clueless when it comes to all this car computer stuff...
 
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Old May 16, 2010 | 09:02 PM
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Originally Posted by 93 mix 'n match
because the old style(60's & 70's) police interceptors had actual engine differences.

i know alot about the older style trucks and cars, but im clueless when it comes to all this car computer stuff...

There is a lot of information on the "P71" site as well as Sullivan Brothers Racing. P71 is the model designation for the Ford police cars.
 
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