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Plenum

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smitty67

Plenum

Is there a reason not to grind these points off of a plenum on a 1986 302 EFI? (see images)

Gary Lewis

Re: Plenum

Administrator

I'm not sure what points you are asking about. Can you post a larger pic?

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Rembrant

Re: Plenum

That's the underside of the upper intake plenum, right where the inner middle bolt goes into the lower intake. Those inner bolts are a real pain to reach and remove sometimes, especially after they're rusted in place. I don't see why you couldn't trim those edges off. They just look like leftovers from the casting process, but maybe they add strength somehow?...not sure.

1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995

NZCOBRA

Re: Plenum

I'm sure some relieving with a die grinder won't hurt a thing . Cheers .

1986 F150 Lariat Supercab 302 efi , soon to have a 385 ci w , forged crank,king bearings , crower billet rods, Auto tech forged pistons world products Snr heads , Comp retro fit 35-421-8 HR, steel roller lifters , Milodon single idle gear drive , Mallory dual sync dissy ,Motec ECU , Profesional products intake , 75 mm TB , 40lb EV1 , Doug thorly Tri-y long tubes , Block 1974 with 1990 serpentine front drive and new Motorcraft A/C pump , will put 3G alternator on it , ford racing diff cover and have a new track-loc , to fit . I have converted it to a 5 speed Tremec TR4250 as the AOD died .