Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 09-17-2012, 03:40 PM
wag53 wag53 is offline
Senior User
 
Join Date: Jan 2003
Location: Sumter SC
Posts: 134
wag53 is starting off with a positive reputation.
5.0 High Performance

OK, recently bought a 1993 F150 ext cab XLT with Mark III option and 5.0 High Performance engine. Does anybody know anything aout this option? The PO said it was rated at 210 HP. Can't seem to see anything different about the engine, looks just the same as my old 5.0 in a 1990.
Reply With Quote
  #2 (permalink)  
Old 09-17-2012, 05:02 PM
GNR22's Avatar
GNR22 GNR22 is offline
Posting Guru
 
Join Date: Mar 2011
Location: Princeton, Wisconsin
Posts: 1,975
GNR22 has a good reputation on FTE.GNR22 has a good reputation on FTE.
As far as I know, the Mark III option didn't have any kind of engine modification, it was all show. A 5.0 HO does exist though. They put them in Mustangs. They're good motors in a car, or a lighter truck. I'm pretty sure the HO 5.0 motors said 302 HO on top of the motor, so it would be visual unless it's changed. I believe that the HO motors were like 220 horse and 300 ft/lbs of torque, something like that. But I'm pretty sure those 5.0 motors in trucks were rated for right around 200 horse, maybe a little more in that time period.
If I'm wrong, someone will correct me.
__________________
--Davey
-1989 F250 (RCLB) 4x4, 4speed NP435 tranny, SAS D44HD, 351w, 3.55 (L/S front and rear), F250/350 Hybrid Suspension, Pacesetter Shorty Headers, into 3" Summit Racing Street and Strip Mufflers, 235/85R16 Uniroyal Liberators.
-1994 Thunderbird LX, Moonlight Blue, 4.6L, Automatic, Bone Stock
-2012 Focus SE
Reply With Quote
  #3 (permalink)  
Old 09-17-2012, 10:40 PM
impish impish is offline
Senior User
 
Join Date: Dec 2010
Posts: 219
impish is starting off with a positive reputation.
Quote:
Originally Posted by GNR22 View Post
As far as I know, the Mark III option didn't have any kind of engine modification, it was all show. A 5.0 HO does exist though. They put them in Mustangs. They're good motors in a car, or a lighter truck. I'm pretty sure the HO 5.0 motors said 302 HO on top of the motor, so it would be visual unless it's changed. I believe that the HO motors were like 220 horse and 300 ft/lbs of torque, something like that. But I'm pretty sure those 5.0 motors in trucks were rated for right around 200 horse, maybe a little more in that time period.
If I'm wrong, someone will correct me.
5.0L H-O eng. began useage in late 1980s w/ fuel injection, my 1989 had roller camshaft, but not roller rocker arms. This continued up till 1995. However, in 1993, Cobra was re-introduced, WITH roller camshaft AND roller rocker arms, as well as larger capacity fuel injectors.

Regular 5.0 H-O engines in Mustang had 19 lb/hr injectors, Cobra had 24 lb/hr, requiring DIFFERENT calibration of computer. 5.0 HO was rated nominally 225 HP, Cobra 245 HP. impish
Reply With Quote
  #4 (permalink)  
Old 09-17-2012, 10:49 PM
Nathanl25's Avatar
Nathanl25 Nathanl25 is offline
Junior User
 
Join Date: Aug 2011
Posts: 84
Nathanl25 is starting off with a positive reputation.
The only difference that i knew of between the regular 5.0 and the H.O.'s, was that the H.O. had a different taller cam lobe and firing order. Allowing it to breath better and run smoother, while making more horsepower.
Reply With Quote
  #5 (permalink)  
Old 09-17-2012, 11:28 PM
impish impish is offline
Senior User
 
Join Date: Dec 2010
Posts: 219
impish is starting off with a positive reputation.
Quote:
Originally Posted by Nathanl25 View Post
The only difference that i knew of between the regular 5.0 and the H.O.'s, was that the H.O. had a different taller cam lobe and firing order. Allowing it to breath better and run smoother, while making more horsepower.
5.0s in trucks did not come with roller cams. The firing order was also different, actually, the old, familiar Ford V-8 firing order from years back.

5.0 H-Os as used in Mustang (and maybe Lincoln), had a REVISED firing order, which Ford claimed RELIEVED some load on the FRONT MAIN BEARINGS. Thus, messing with interchanging camshafts causes plenty of confusion, due to the firing order difference, not to mentioon the fact that H-Os had STEEL gears on the distributor shafts, which would EAT the cast iron gear of the flat-tappet camshaftr, if used with an H-O distributor gear.

(watch the locations of those plug wires, guys!).

impish
Reply With Quote
  #6 (permalink)  
Old 09-18-2012, 07:17 AM
Diesel_Brad's Avatar
Diesel_Brad Diesel_Brad is offline
Post Fiend
 
Join Date: May 2009
Location: Gilbert, PA
Posts: 12,997
Diesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud ofDiesel_Brad has much to be proud of
Quote:
Originally Posted by wag53 View Post
OK, recently bought a 1993 F150 ext cab XLT with Mark III option and 5.0 High Performance engine. Does anybody know anything aout this option? The PO said it was rated at 210 HP. Can't seem to see anything different about the engine, looks just the same as my old 5.0 in a 1990.
You were LIED to. The MarkIII conversion was cosmetic ONLY.

BUT an easy way to tell if you have a5.0 HO in your truck would to look at the plentum. If it goes over the passenger side valve cover it is NOT. If it goes over the drivers side vale cover it IS
__________________
96 F350 CCLB 460 5pd 4x4 /97 F250 CCSB Dually 7.3 5 spd 4x4
94F150 RCSB Lightning/86 F250 RCLB 6.9 4spd 4x4
80 F350 RCLB 429 C6 4x4/
04 Ranger SCSB
96 Bronco 302 5speed, 6" and 35s
Reply With Quote
  #7 (permalink)  
Old 09-18-2012, 09:09 AM
lew52's Avatar
lew52 lew52 is offline
Postmaster
 
Join Date: Jan 2009
Posts: 4,554
lew52 has a very good reputation on FTE.lew52 has a very good reputation on FTE.lew52 has a very good reputation on FTE.lew52 has a very good reputation on FTE.
Quote:
Originally Posted by impish View Post
5.0s in trucks did not come with roller cams. The firing order was also different, actually, the old, familiar Ford V-8 firing order from years back.

5.0 H-Os as used in Mustang (and maybe Lincoln), had a REVISED firing order, which Ford claimed RELIEVED some load on the FRONT MAIN BEARINGS. Thus, messing with interchanging camshafts causes plenty of confusion, due to the firing order difference, not to mentioon the fact that H-Os had STEEL gears on the distributor shafts, which would EAT the cast iron gear of the flat-tappet camshaftr, if used with an H-O distributor gear.

(watch the locations of those plug wires, guys!).

impish
....The 94 + truck 302s had roller cams , and some had mass air and sefi , the cams were just samaller than the HO cam , they have the same firing order as the HO and used the steel cam gear for the steel roller cam....
Reply With Quote
  #8 (permalink)  
Old 09-18-2012, 09:24 PM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 20,128
Conanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud ofConanski has much to be proud of
Actually some trucks were equipped with roller cams as early as '92 but it was the tiny Crown Vic cam with the old firing order, these trucks were the dumping ground for all kinds of leftover bits unfortunately.
As for the PO's question about his MK3, you would know if you had a HO.. the truck would really haul with the hammer down.
__________________
Paul (Conan) O'Brien

1990 5.0HO AOD XLT X-Cab F150 3.55LS, 1994 3.0L 5-sp x-cab Ranger 3.45, 2004 3.0L 5-sp X-cab Ranger Edge 4.10, 2004 2.5L 5-spd Subaru Legacy
1996 Kawasaki ZX11D, 2004 Honda 599, 2008 Kawasaki KLR650
Reply With Quote
Old 09-18-2012, 09:24 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
5.0L "High Output" Engine Listed in 1985 Owner's Manual LARIAT 85 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 3 04-08-2014 09:44 PM
5.0 differences? inkedf150 1987 - 1996 F150 & Larger F-Series Trucks 25 12-18-2013 10:48 PM
Brake rotor problems need options Bronc1 2009+ F150 28 10-24-2013 07:50 AM
Pa performance high tq 5.0 starter for sale bearster18 Ford Truck Parts for Sale 1 09-01-2013 06:13 PM
Speed density stroker Nally427 1987 - 1996 F150 & Larger F-Series Trucks 4 05-05-2013 10:57 PM



All times are GMT -5. The time now is 01:45 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup