351w price question
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351w price question
OK I need some advice from you experts on motors.... I have a 1991 F150 4x4 with a (1986 I think) 302HO SD mustang motor, EFI, with an E4OD tranny, and 456 gears. Im pushing big tires and want more power. I have found a 351W that is in my budget. This is an email from a friend of a friend:
I got a ’74 Windsor.
Ported heads & screw in rocker studs
Will need gone through, been sittin.
Got new pistons in a box 4 it.
I’ve got 40+ hours porting on the heads+new ARP studs & machined for dual valve springs, heads milled .010.
These heads will FAR outflow any factory iron stuff including GT40.
Is $300 for this a good price? I am going to do a slow rebuild/moderate build up as my 1st motor build project. I have always wanted to do one and I just thought why not now....
Thanks in advance.
I got a ’74 Windsor.
Ported heads & screw in rocker studs
Will need gone through, been sittin.
Got new pistons in a box 4 it.
I’ve got 40+ hours porting on the heads+new ARP studs & machined for dual valve springs, heads milled .010.
These heads will FAR outflow any factory iron stuff including GT40.
Is $300 for this a good price? I am going to do a slow rebuild/moderate build up as my 1st motor build project. I have always wanted to do one and I just thought why not now....
Thanks in advance.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
$300 is a deal for complete motor that is in rebuildable condition. Problem is you won't know what it needs until it's disassembled and measured, so figure on spending $1000 on the bottom end rebuild(parts and machine work).. unless you are getting a deal on the machining. The heads could be great but could also be a waste of money... just depends what they were to begin with, if they come with a valvetrain or not, and if the guy doing the porting knows what he is doing or not. Bottom line is you need more info on the heads, are they Ford castings or aftermarket? Exactly what porting has been done? Is the valvetrain included? If there is no valvetrain then you could easily spend $500-600 on that alone plus several hundred more to have hardened valve seats and new guides installed, and for that kind of money you could have brand new high performance aftermarket heads.
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Asking for more info, your exact questions. Thanks again Conanski and I will update the info as soon as I get it back. Im going to be doing this slowly and I will have some experienced help but I would like to do the most of it myself. Is their any good guids, books, that you would recomend that is good for beginers?
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
cam selection may also be of concern with this motor. as it is now it probably wont run well on your efi. I see your running Boggers, what size are those? I suspect your 4.56 gears are insufficent for them. Also know that most of the efi hardware on your 302 wont fit the 351w at all. Honestly finding a stock 94+ 5.8 would be a better starting part and give you far less issues with the efi among other things.
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I definantly planned on a different cam to help better match the EFI. Also it comes with a Carb set up but I will have to get an intake for the EFI system, what other than that would I need to change out?
I run 38's.
I thought the newer motors were even harder to match up to the older? Wouldnt I have to change out the computer to match due to it being an MAF motor?
I run 38's.
I thought the newer motors were even harder to match up to the older? Wouldnt I have to change out the computer to match due to it being an MAF motor?
Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
the 5.8 didnt get MAF till 96 except for the cali rigs which got it in 95 but are very rare.
if your running 38's going to a 5.8 wont help you at all. U need to do a gear swap to 5.13 gears ASAP to see any real gains or drop in a 460 to make up for the lack of gearing. you have an OD tranny so hwy rpms should be fine. plus the 302 likes hi revs.
also those boggers are heavy and turn a lot of earth which robs power. gearing gearing gearing thats all i can say and will give better return over a motor swap at this time.
if your running 38's going to a 5.8 wont help you at all. U need to do a gear swap to 5.13 gears ASAP to see any real gains or drop in a 460 to make up for the lack of gearing. you have an OD tranny so hwy rpms should be fine. plus the 302 likes hi revs.
also those boggers are heavy and turn a lot of earth which robs power. gearing gearing gearing thats all i can say and will give better return over a motor swap at this time.
Cargo Master
Joined: Oct 2008
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From: Elyria, OH
MAF or not, a 351w is a 351w, blockwise. You will need EFI heads, intake (upper and lower), all the sensors for the intakes, and all brackets for the pullies
not sure on the ECU... may have to get a ECU from a bronco that had the 5.8 and E4OD. Not completly sure though. May be just fine. Im sure someone will chime in.
The 5.8 Will help with turning those tires because it makes it torque down low whereas the 302's powerband is alot higher. A good cam, heads and a good exhaust will put you close to 300hp with 3-350lbs torque so expect it to pull better.
EDIT: as stated above a 94+ motor will have the roller set up and will give you more options on cam selections.
not sure on the ECU... may have to get a ECU from a bronco that had the 5.8 and E4OD. Not completly sure though. May be just fine. Im sure someone will chime in.
The 5.8 Will help with turning those tires because it makes it torque down low whereas the 302's powerband is alot higher. A good cam, heads and a good exhaust will put you close to 300hp with 3-350lbs torque so expect it to pull better.
EDIT: as stated above a 94+ motor will have the roller set up and will give you more options on cam selections.
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Hotshot
Joined: Jul 2002
Posts: 14,285
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From: Bend,OR
Yes you would want a 5.8/E4od computer from 90-91. you could possibly get a 92-95 5.8/e4od ecu but not sure if the pin outs changed. You can reuse your current 91 302 harness on the 5.8. I did a 5.8 swap on my older 88 bronco that came with a 302. just reused the harness and got the proper computer. easy swap, but my 5.8 was a complete 94 F250 5.8 motor.
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Amazon.com: How to Rebuild Small-Block Ford Engines (9780912656892): Tom Monroe: Books
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
I'd agree a stock 5.8 won't be much of an improvement but one that's built up even a little will be substantially stronger... espectially below 3000rpm.
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