71 Bronco 302 engine specs????
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71 Bronco 302 engine specs????
Hello, newbie to the forums here, long time Ford fan and enthusiast!
I am about to acquire a 1984 Ford Ranger and a 1971 Ford 302 v8 out of a 1971 Bronco.
plans are to marry the two once i round up all the parts, bells, and whistles i want to use to build the motor.........but first, i want to get more familiar with what i am working with in the first place.
does anyone have all the stock info for this motor? I dont have casting numbers yet, but is there any kind of general info/general knowledge out there of the following?:
what size (bbl count and cfm) carburetor did this engine come with typically?
what is the stock compression ratio?
what are the head specs? (Int/exh runner size, chamber size in cc's, valve diameters, etc)
what are the stock camshaft specs?
does this motor have forged internals?
and what would i have to do to get GT40 heads to fit this motor? Or is it not possible due to differences?
thanks all!
I am about to acquire a 1984 Ford Ranger and a 1971 Ford 302 v8 out of a 1971 Bronco.
plans are to marry the two once i round up all the parts, bells, and whistles i want to use to build the motor.........but first, i want to get more familiar with what i am working with in the first place.
does anyone have all the stock info for this motor? I dont have casting numbers yet, but is there any kind of general info/general knowledge out there of the following?:
what size (bbl count and cfm) carburetor did this engine come with typically?
what is the stock compression ratio?
what are the head specs? (Int/exh runner size, chamber size in cc's, valve diameters, etc)
what are the stock camshaft specs?
does this motor have forged internals?
and what would i have to do to get GT40 heads to fit this motor? Or is it not possible due to differences?
thanks all!
Logistics Pro
Joined: Nov 2009
Posts: 3,886
Likes: 12
From: Lawrence Swamp
as a 'ford man' U know just bout anything of the era could B there.
Next
because it's 47 y/o U don't know what's been swapped in.
I'd suggest patients'n a positive ID - once U have it.
That doesn't mean U can sit back. U can do some wrk now on researching where all the castings'n stampings might B on the motor (for heads v block v exh. mani, etc) unless U know all that now.
" ...marry the two..."
What vehicle will U end up with?
W E L C O M E !!!
to the site (ONE of the best on the forum).
U may wanna hook up w/ur local chapter, I found alot of enjoyment w/mine.
Congrats on ur recient purchase - a 302 Ranger ( if 4WD I'd put in a built C4'n call it done). Might visit the ranger station dot com.
Since ur in the bronk forum I'd ***-u-me U got 1 and may B settin up for that. An efi 4.9 is a good choice 4 that depending on final application (wrk, rec, st, strip, show, etc). Let us know that application (80% of driving conditions, 80% of RPMs)) and may B geographic location (not in sig)...
Good Luck
Keep Talkin
Next
because it's 47 y/o U don't know what's been swapped in.
I'd suggest patients'n a positive ID - once U have it.
That doesn't mean U can sit back. U can do some wrk now on researching where all the castings'n stampings might B on the motor (for heads v block v exh. mani, etc) unless U know all that now.
" ...marry the two..."
What vehicle will U end up with?
W E L C O M E !!!
to the site (ONE of the best on the forum).
U may wanna hook up w/ur local chapter, I found alot of enjoyment w/mine.
Congrats on ur recient purchase - a 302 Ranger ( if 4WD I'd put in a built C4'n call it done). Might visit the ranger station dot com.
Since ur in the bronk forum I'd ***-u-me U got 1 and may B settin up for that. An efi 4.9 is a good choice 4 that depending on final application (wrk, rec, st, strip, show, etc). Let us know that application (80% of driving conditions, 80% of RPMs)) and may B geographic location (not in sig)...
Good Luck
Keep Talkin
Thread Starter
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New User
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Really im just looking for specs on the 1971 302 is all.
i will end up with the 302 in the 1984 Ranger. Sorry if that makes you cringe. I think the donor Bronco is long gone. As a side note: i LOVE the 70s Broncos.
Since ur in the bronk forum I'd ***-u-me U got 1 and may B settin up for that. An efi 4.9 is a good choice 4 that depending on final application (wrk, rec, st, strip, show, etc). Let us know that application (80% of driving conditions, 80% of RPMs)) and may B geographic location (not in sig)...
Good Luck
Keep Talkin
Good Luck
Keep Talkin
as for driving conditions....lots of hills and winding roads, im in Southern Indiana. The new setup will need to have a lot of torque and the rpms most of the time probably wont be that high (2500-3500?) although i would like to take the engine to 85-90% of its RPM limit (5000-5800?)....i dont know at what point these old 302s will scatter but i definitely dont want to do that, but i do want to have some fun, do donuts, burnouts...etc etc.
i plan on daily driving the truck, and maybe enter it in a car show here and there. I dont see myself taking it to the drag strip, there isnt one very close to me.
Logistics Pro
Joined: Nov 2009
Posts: 3,886
Likes: 12
From: Lawrence Swamp
lotta 302 / 5 ohs over on RangerStation.com...
They can give U some pointers, other considerations (big weight change inda nose).
Ex buddy here did this w/a sm lift (15/16 inch tires now) & C4 ('ex' B cuz I think he stole my 'pan fill'
C4 oil pan frm the '77 bronco 302 I had in the back 40 to use for prts 4 my own rig.
It's a bronk specific prt - a lill harder to find.)
"...they could have put a cam in it or something..."
didn't mean that. Ford is not like che**y. Motors run cross models.
https://www.ford-trucks.com/forums/forum122/
talk (post) to
Koestner
good ppl over there!
They can give U some pointers, other considerations (big weight change inda nose).
Ex buddy here did this w/a sm lift (15/16 inch tires now) & C4 ('ex' B cuz I think he stole my 'pan fill'
C4 oil pan frm the '77 bronco 302 I had in the back 40 to use for prts 4 my own rig.
It's a bronk specific prt - a lill harder to find.)
"...they could have put a cam in it or something..."
didn't mean that. Ford is not like che**y. Motors run cross models.
https://www.ford-trucks.com/forums/forum122/
talk (post) to
Koestner
good ppl over there!
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
9.5:1
Again pretty small, Ford has always been very conservative with cam specs even restrictive at times. A big stock cam would be in the 260deg range seat to seat with a hair over 0.400" lift, a small cam 240 deg with 0.380" lift.
No.
Bolt them on, some versions may require head bolts with shoulders, they are a great upgrade that flow at least 25% better.
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[
QUOTE=chrlsful;18195375]
https://www.ford-trucks.com/forums/forum122/
talk (post) to
Koestner
good ppl over there![/QUOTE]
ill check that out! Thanks again for your help!
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Thats actually less than i thought. From reading around i thought it was 10:1. But 9.5:1 is ok. It may be different once i put different heads on.
thanks!
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Logistics Pro
Joined: Nov 2009
Posts: 3,886
Likes: 12
From: Lawrence Swamp
What will the actual application be?
% on v off rd?, type of trail?, mudder?, geographic location (did U say Iowa?)?
% on v off rd?, type of trail?, mudder?, geographic location (did U say Iowa?)?
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The only Bronco parts will be the short block for the most part.
probably no off road for now. Im in southern Indiana.
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surprisingly, there really arent any 4x4 parks close, that i know of yet. The truck isnt 4x4 to begin with, so i feel like a swap would be an undertaking and right now i just want to focus on getting the power plant right before i decide anything like that.
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