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Old 10-30-2004, 04:04   #1 (permalink)
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Clearance on EDXR8 Bonnet

a friend of mine has a highly worked EDXR8 pushing out over 200rwkw (naturally aspirated). She has the Edlebrock performer RPM upper and lower manifold, and is currently considing putting in a thenolic spacer.

i think this will add an extra 3/4 of an inch to the height of the motor, and before we do this does anyone know if it will clear the bonnet?
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Old 10-30-2004, 04:11   #2 (permalink)
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Re: Clearance on EDXR8 Bonnet

Why not try & put blue tack or something like that on the inlet manifold & shut the bonnet.
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Old 10-30-2004, 04:15   #3 (permalink)
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Re: Clearance on EDXR8 Bonnet

good idea.... anybody got some playdoh we can borrow??
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Old 10-30-2004, 04:47   #4 (permalink)
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Re: Clearance on EDXR8 Bonnet

From what I have heard, the 1/2" spacers are fine but the 1" ones are a problem.
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Old 10-30-2004, 05:41   #5 (permalink)
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Re: Clearance on EDXR8 Bonnet

Apart from keeping the chamber cooler has anyone had any increase in power or torque using them
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Old 10-30-2004, 06:17   #6 (permalink)
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Re: Clearance on EDXR8 Bonnet

Can't remember which ford magazine did the testing but they got 2-3rwkw and 5Nm improvement with the 1/2" spacer.
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Old 10-30-2004, 06:45   #7 (permalink)
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Re: Clearance on EDXR8 Bonnet

The Bible version 2 (5.0L FORD DYNO TESTS by SADESIGNS) explains that the spacers increase runner length which helps torque. It also explains that cooling the upper half of the manifold produces power by allowing a denser intake charge - colder air is denser air which means more power.
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Old 10-31-2004, 07:40   #8 (permalink)
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Re: Clearance on EDXR8 Bonnet

i have a 3/8" spacer and it fits, you wouldn't fit a 1" spacer though
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Old 10-31-2004, 19:46   #9 (permalink)
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Re: Clearance on EDXR8 Bonnet

How much would a 1/2" spacer cost? And where can you get them from?
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Old 10-31-2004, 19:56   #10 (permalink)
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Re: Clearance on EDXR8 Bonnet

my 3/8" spacer was $160, and that was an edelbrock spacer
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