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post #1 of 5 (permalink) Old 11-03-12, 11:04 AM Thread Starter
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460 intake

I have a 1978 grand marquis with a 460 I want to put a edlebrock intake on it but the one i have is for non egr can i just block it off to make it work?

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post #2 of 5 (permalink) Old 11-03-12, 03:15 PM
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Re: 460 intake

Do you have emissions testing where you live? If so, your car will not pass with the EGR blocked.
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post #3 of 5 (permalink) Old 12-13-12, 09:38 PM
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Re: 460 intake

You could and then deal with the resulting engine knock by retarding the timing about 4 degrees. You will lose MPG and performance.
The EGR only is in play at part throttle and does not have any effect on full throttle operation so just get the correct maifold, and comply with emission laws.

A high mileage 460 from that era may need more than an intake to make it perform imo.- BA

2001 Grand Marquis LS, 25K miles mint (edit; now 56K miles) Finally a vehicle with NO LEAKS !
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post #4 of 5 (permalink) Old 08-24-13, 03:56 PM
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Re: 460 intake

It will NOT hurt a thing...as long as you dont have emisions to worry about.
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post #5 of 5 (permalink) Old 08-28-13, 02:44 PM
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Re: 460 intake

Not sure where you're from, but here in Ohio, any car over 25 years old is exempt from emissions testing...I've blocked off many EGR's on older vehicles without any noticeable effects.
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