351 rebuild
Thread Starter
|
Tuned
Joined: Mar 2004
Posts: 400
Likes: 2
From: South Texas
351 rebuild
I spun a bearing on my 93 bronco 5.8. I am now debating dropping in a rebuilt engine or rebuilding mine with a little more performance than stock. It is a daily driver with 170,000 miles and a 4inch lift with 35's. I have never rebuilt an EFI so I am trying to get ideas so I can compare cost and efort between the rebuilt or rebuilding it myself. Thanks for any suggestions.
Junior User
Joined: Sep 2004
Posts: 52
Likes: 0
Go ahead and rebuild your 351 for a little more performance. It may seem intimidating being EFI, just make sure you clearly mark all of the connectors. It should be just as easy as rebuilding a carb'd 351. While you have the motor out, go ahead and slip a cam in in it and maybe higher compression pistions. You won't regret it and not only will you save money compared to buying another engine, you will gain the experience of working with the EFI. As far as price goes, if you find a competent machine shop $650 dollars should get you the following: Everything cleaned and crack tested, New pistons, new rings, Full engine gasket and bearing set(including main seals), new valve springs, guides, seals, retainers, all block machining, and the pistons installed on the rods.
Kirk
Kirk
Last edited by captainkirk; Oct 20, 2005 at 08:55 PM.
Posting Guru
Joined: Mar 2002
Posts: 2,070
Likes: 2
From: Boise, Idaho
You can hop up the original short block and make a big difference in the way that engine works. Retro-fitting a roller cam using 5.0 HO parts is one thing you can do. Since you're looking at fixing the crank already, you can get a stroker crank, use stock 351 rods, and stock 302 pistons to make a 392W. The crank is pretty cheap on ebay and considering that you need crank work, it's almost free to make a stroker.
Be sure to zero-deck the short block. Degree the cam. Hypereutectic pistons are your best bet.
Be sure to zero-deck the short block. Degree the cam. Hypereutectic pistons are your best bet.
Posting Guru
Joined: Mar 2004
Posts: 1,099
Likes: 0
From: Destin/Ft. Walton Beach,
You can hop up the original short block and make a big difference in the way that engine works. Retro-fitting a roller cam using 5.0 HO parts is one thing you can do. Since you're looking at fixing the crank already, you can get a stroker crank, use stock 351 rods, and stock 302 pistons to make a 392W. The crank is pretty cheap on ebay and considering that you need crank work, it's almost free to make a stroker.
Be sure to zero-deck the short block. Degree the cam. Hypereutectic pistons are your best bet.
Be sure to zero-deck the short block. Degree the cam. Hypereutectic pistons are your best bet.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
well he cant stroke running speed density. so that option is out with unless converting to mass air.
go with compcam 35-255-5 great speed density cam with good torque. if you can get your heads worked over or find a set of gt40 heads not gt40Ps that would be an even better upgrade. shoot for a compratio of 9.5 this will still run on 87. headers and a free flowing 3" exhaust single of course will help out lots.
if you can afford to get the edelbrock efi truck intake do it. great gains also a bbk 56mm throttle body will round out your build and really give ya what your looken for.
by the way what gears are you running with those 35"s
go with compcam 35-255-5 great speed density cam with good torque. if you can get your heads worked over or find a set of gt40 heads not gt40Ps that would be an even better upgrade. shoot for a compratio of 9.5 this will still run on 87. headers and a free flowing 3" exhaust single of course will help out lots.
if you can afford to get the edelbrock efi truck intake do it. great gains also a bbk 56mm throttle body will round out your build and really give ya what your looken for.
by the way what gears are you running with those 35"s
Posting Guru
Joined: Mar 2002
Posts: 2,070
Likes: 2
From: Boise, Idaho
Originally Posted by stevef100s
All good info. Sorry to butt in, but I was wondering how a guy from Idaho picked up an Aus. 351, and if it's running yet (in what)?
I'm currently working on a 292/FMX and a 312/T85/od but the Cleveland is next. Going into a 53 Studebaker 1/4 ton.
More Turbo
Joined: Dec 2003
Posts: 616
Likes: 5
From: Missouri - Lake of the Oz
stroker & speed density
Originally Posted by Kemicalburns
well he cant stroke running speed density. so that option is out with unless converting to mass air.
He has found it to be very reliable with great gas mileage (for a V8) and a great deal more "torquey" in the low RPM band than the original 302. Performance seems to be on a par with a factory 351.
dn.
Trending Topics
Thread Starter
|
Tuned
Joined: Mar 2004
Posts: 400
Likes: 2
From: South Texas
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
Originally Posted by donnor
I may beg to differ with the above, Two years ago my son & I rebuilt a 94 302 as a 347 stroker. We installed it in his 92 Bronco and have had virtually NO problems with it - related to air management or anything else. We maintained his factory SD; changing only the location of the air temperature sensor from the lower intake (since the 94 intake did not have an opening for it) to the upper side of the air filter box - much the same as a factory MAF system.
He has found it to be very reliable with great gas mileage (for a V8) and a great deal more "torquey" in the low RPM band than the original 302. Performance seems to be on a par with a factory 351.
dn.
He has found it to be very reliable with great gas mileage (for a V8) and a great deal more "torquey" in the low RPM band than the original 302. Performance seems to be on a par with a factory 351.
dn.
Moderator
Joined: Jun 2003
Posts: 3,547
Likes: 71
From: Calhoun GA
Many GEN 1 Lightning owners are running storked speed density applications, and custom grind SD friendly cams. Of course, there is aftermarket tuning that ties everything together.
Even so, you can't just throw a mass air kit on it and say it'll run. Mass air is not a "set it and forget it" type system. unless this is going to be a stock or very mild rebuild, it'll still need tuning to dial everything in properly.
Even so, you can't just throw a mass air kit on it and say it'll run. Mass air is not a "set it and forget it" type system. unless this is going to be a stock or very mild rebuild, it'll still need tuning to dial everything in properly.
Posting Guru
Joined: Mar 2002
Posts: 2,070
Likes: 2
From: Boise, Idaho
Originally Posted by donnor
I may beg to differ with the above, Two years ago my son & I rebuilt a 94 302 as a 347 stroker. We installed it in his 92 Bronco and have had virtually NO problems with it - related to air management or anything else. We maintained his factory SD; changing only the location of the air temperature sensor from the lower intake (since the 94 intake did not have an opening for it) to the upper side of the air filter box - much the same as a factory MAF system.
He has found it to be very reliable with great gas mileage (for a V8) and a great deal more "torquey" in the low RPM band than the original 302. Performance seems to be on a par with a factory 351.
dn.
He has found it to be very reliable with great gas mileage (for a V8) and a great deal more "torquey" in the low RPM band than the original 302. Performance seems to be on a par with a factory 351.
dn.
I've got an 85 Lincoln 5.0 engine that's probably going to be converted to SEFI, possibly a 331 stroker.
More Turbo
Joined: Dec 2003
Posts: 616
Likes: 5
From: Missouri - Lake of the Oz
To air is human...
Originally Posted by Kemicalburns
what cam were you running. and how would the ecu make calculations running such a motor? if the cam kept its lobe seperation at 114* and the motor didnt lean out then its possible. but the computer cant compensate like a mass air ecu can. you couldnt have run anything larger then the stock 19lb injectors. so you also used a mustang upper/lower intake or did you continue to use the stock bronco intake? speed density cant calculate incoming flow so i cant understand that by moving the air temp sensor to the intake made any difference. do you have any pics of the install , not saying your lieing just want to see how its setup.
Any of you who have put a K&N FIPK on a MAF Bronco/F-Series already know that with this setup the temp sensor is mounted to a bracket that extends off to the side of the filter, placing the sensor out in the open in the engine compartment: Not even directly in the airflow path of the intake stream.
dn.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
that would be great. because i have never heard of anyone doing it this way. using the the stock cam and intake helped im sure. but that motor sure isnt to its potential either wouldnt you agree? if the combo is right it will work. but how many times do you think that happens hehe. thats why i try not to go there with some of these folks.
More Turbo
Joined: Dec 2003
Posts: 616
Likes: 5
From: Missouri - Lake of the Oz
different strokers for different folkers
Originally Posted by Kemicalburns
that would be great. because i have never heard of anyone doing it this way. using the the stock cam and intake helped im sure. but that motor sure isnt to its potential either wouldnt you agree? if the combo is right it will work. but how many times do you think that happens hehe. thats why i try not to go there with some of these folks.
dn.
Thread
Thread Starter
Forum
Replies
Last Post
xtal_01
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
7
Aug 11, 2016 05:41 PM
oregon250
Clutch, Transmission, Differential, Axle & Transfer Case
2
Jun 18, 2003 03:03 PM
