302 and 302 H.O
02-24-2006, 09:43 AM
#1
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Join Date: Nov 2005
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302 and 302 H.O
i was wondering what is the difference between a 302 and a 302 H.O is there a difference in the bottom end or is it just the heads because i am having problems with my 89 mustang 302 H.O so i bought a 89 crown vic for the motor and it has a plain 302 also i am going to change the fuel injection to carburated will that make me lose horsepower or gain or stay about the same
02-24-2006, 12:58 PM
#2
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Location: AR
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RE: 302 and 302 H.O
if tuned right you will get a little more hp out of the carb but thats if your reall good at tuning.
swap the heads thats gonna be the main difference in a ho and a reg 5.0 theres more like the timing chain cam and a few other small things oh yeah the ho has forged pistons in 89 plus a thiner head gasket. theres more but i can't remember off the top of my head.
swap the heads thats gonna be the main difference in a ho and a reg 5.0 theres more like the timing chain cam and a few other small things oh yeah the ho has forged pistons in 89 plus a thiner head gasket. theres more but i can't remember off the top of my head.
02-24-2006, 01:11 PM
#3
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Join Date: Jan 2006
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RE: 302 and 302 H.O
I can't be certain about the bottom end. I know you have cam/timing changes. The convertion to a carb. is a step backwards with street drivability. Fuel injection can give a better burn and smoother power. If you want to make big power, carbs and EFI will do it. Price will be different. Don't change to a carb. unless you plan on making big power. Both carbs. and EFI will make big power. If you learn how to tune the fuel injected car, you can save money in the beginning. Everyone can tell you that there are too many variables when you change engine parts. Chatting E-mail is too hard to say what parts do what.
STAY EFI = my vote.
STAY EFI = my vote.
02-24-2006, 04:14 PM
#5
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Location: Sarasota/Orlando, Florida
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RE: 302 and 302 H.O
If you swap to the crown vic motor you're going to lose some power... like a lot. These were the only specs I could find for the car
*150hp@2000rpm
*160hp@2000rpm(with dual exhaust)
*270ft/lbs torque @2200rpm
*280ft/lbs @2200(with dual exhaust)
*150hp@2000rpm
*160hp@2000rpm(with dual exhaust)
*270ft/lbs torque @2200rpm
*280ft/lbs @2200(with dual exhaust)
02-24-2006, 04:40 PM
#6
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Join Date: Sep 2005
Location: AR
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RE: 302 and 302 H.O
ORIGINAL: waxyourboard
If you swap to the crown vic motor you're going to lose some power... like a lot. These were the only specs I could find for the car
*150hp@2000rpm
*160hp@2000rpm(with dual exhaust)
*270ft/lbs torque @2200rpm
*280ft/lbs @2200(with dual exhaust)
If you swap to the crown vic motor you're going to lose some power... like a lot. These were the only specs I could find for the car
*150hp@2000rpm
*160hp@2000rpm(with dual exhaust)
*270ft/lbs torque @2200rpm
*280ft/lbs @2200(with dual exhaust)
02-24-2006, 06:41 PM
#7
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Join Date: Jun 2004
Location: Charles Town WV
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RE: 302 and 302 H.O
the heads are the same less the valve springs as far as I have ever seen the HO motor dose not have anything special about the heads all 5.0 heads 79-93 are the same except for GT 40 heads or the GT40P heads now the E6 heads are diff. then them all and E5 heads are the same as E7. The HO will be a roller motor and the non HO could be a roller or a flat tappet cam motor the pistons are diff. more then just forged or cast as the compression is different also the timing chains are different. I have found that the CFI injection motors are flat tappet cams and the SFI motor cams are roller but I have not had all the motors built apart so who knows what Ford did. just my .02
02-24-2006, 06:45 PM
#8
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RE: 302 and 302 H.O
ORIGINAL: uedlose
the heads are the same less the valve springs as far as I have ever seen the HO motor dose not have anything special about the heads all 5.0 heads 79-93 are the same except for GT 40 heads or the GT40P heads now the E6 heads are diff. then them all and E5 heads are the same as E7. The HO will be a roller motor and the non HO could be a roller or a flat tappet cam motor the pistons are diff. more then just forged or cast as the compression is different also the timing chains are different. I have found that the CFI injection motors are flat tappet cams and the SFI motor cams are roller but I have not had all the motors built apart so who knows what Ford did. just my .02
the heads are the same less the valve springs as far as I have ever seen the HO motor dose not have anything special about the heads all 5.0 heads 79-93 are the same except for GT 40 heads or the GT40P heads now the E6 heads are diff. then them all and E5 heads are the same as E7. The HO will be a roller motor and the non HO could be a roller or a flat tappet cam motor the pistons are diff. more then just forged or cast as the compression is different also the timing chains are different. I have found that the CFI injection motors are flat tappet cams and the SFI motor cams are roller but I have not had all the motors built apart so who knows what Ford did. just my .02
02-24-2006, 07:19 PM
#9
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Location: Charles Town WV
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RE: 302 and 302 H.O
uh well yes the casting numbers are diff. e5 = 85 e6= 86 e7 =87 the ports and valve size are the same. Like I said the 86 heads are totally different (JUNK) as far as the rest they look to be the same to me.and all the valves sizes are the same.As far as a performance gain in the HO heads and the Non HO heads all but the 86 there is nill to none other then the one mold was better then the other factory cast screw ups(very little diff). all but the GT 40 and GT40 P. just me