upper plenum swaps on comparable ci engines?

0h n0 5.0 · 02-21-2003, 05:33 PM

jus proddin around under the hood of my crown vic an was wondering exactly what 302 upper plenums would work on a 94 5.0? i've seen the cobra, the explorer(which is pretty much the same)victor Jr, performer an others but was wondering about the regular 302 produced in the late 80's crown vics an GM's? could you port these an see any kind of impressive numbers other than a stock O.E 5.0HO upper? has anybody tried them or know the dimensions of the runners? i'm considering a slow rebuild of the plant, an right now goin with an a.m. upper, GT-40's, 65TB,maf an cold air.Jus tryin to get some breathin room?

87saleen · 02-21-2003, 09:53 PM

i have a stock 87 upper ho and a stock 87 upper which was extrude honed. the cast dates are within 3 months of each other and the part #s are identical. there are minor exterior differences, (other than no ho on neck) but i have been told that before it was ported the non ho unit had a smaller diameter front port. i dont know what junk yard vehicle it was taken from, but it is clean.

02-21-2003, 05:33 PM	#1
0h n0 5.0 Registered Member Join Date: Feb 2002 Location: Birmingham, Alabama Posts: 371	upper plenum swaps on comparable ci engines? jus proddin around under the hood of my crown vic an was wondering exactly what 302 upper plenums would work on a 94 5.0? i've seen the cobra, the explorer(which is pretty much the same)victor Jr, performer an others but was wondering about the regular 302 produced in the late 80's crown vics an GM's? could you port these an see any kind of impressive numbers other than a stock O.E 5.0HO upper? has anybody tried them or know the dimensions of the runners? i'm considering a slow rebuild of the plant, an right now goin with an a.m. upper, GT-40's, 65TB,maf an cold air.Jus tryin to get some breathin room? __________________ 0h n0 5.0 Alias:94five0, Vr00m, Black Shuck 1994 GT 5.0l

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Trouble! Cant remove upper intake plenum	5.0 Fiend	Windsor Power	8	09-09-2004 08:30 PM
anyone tried the b.a.r ported upper plenum ?	slow98	Modular Madness	9	07-28-2003 04:45 PM
porting upper plenum on 4.6..A MUST	sleeper_stang_2000	Modular Madness	14	07-16-2003 10:54 AM
What part is this???? '96 Mustang Cobra Upper Plenum	96_4.6	Modular Madness	16	12-11-2002 12:02 PM
Engine oil in my intake upper plenum -please help	Stang_ROTY	Windsor Power	8	08-03-2001 03:16 PM

02-21-2003, 09:53 PM	#2
87saleen Registered Member Join Date: Feb 2002 Location: boulder city, nv Posts: 6	i have a stock 87 upper ho and a stock 87 upper which was extrude honed. the cast dates are within 3 months of each other and the part #s are identical. there are minor exterior differences, (other than no ho on neck) but i have been told that before it was ported the non ho unit had a smaller diameter front port. i dont know what junk yard vehicle it was taken from, but it is clean.