351 W hints, tips, etc. - 2003-04 Mach 1 Registry Owners Club

mach1metalhead · 02-04-2014, 09:18 PM

Anyone have experience with Ford 351s? It's an '80s (not sure what year exactly) Windsor. Comes with 302 heads, but I'm not contracted to those (my boss offered to buy them, if I don't want them). I'm not sure what I want from it yet. FI would be neat, but I don't know much about the block and I don't need to add my own "speed hole". Kinda thinking individual carbs/throttle bodies would be fun, as well or instead. If you have any information, please help me out.

MAD_MACh1 · 02-15-2014, 06:03 PM

Stock 351 blocks a much stronger than 302 blocks. So unless your going for mega power then don't worry about it. If they are true 302 heads they won't work on a 351w without modification. A 302 has 7/16 head bolts and a 351w uses a 1/2 head bolt. They make flanged sleeve to use a 351 head on a 302 but you'll need to drill out the hole to use a true 302 head on a 351. Most aftermarket 302/351 heads are drilled for 1/2 and they use the adapter on a 302. Cylinder heads are probably the most important thing on a 351w. A good running 351w needs a good head to reach it's full potential. What's good for a 302 will only be ok on a 351 do the extra cubic inch. They become even more important on a stroked setup. I personally like the Dart Pro 1 195cc heads. AFR would also be a good choice.

Fuel injection is nice but it gets hard to find a good intake for a stroker due to the air volume needs. TFS-R or Victor Jr would be my choice.

Headers will also be important. Again the large cid require better flow.

From my experience most people that are unhappy with a 351 have used a lot of 302 parts to build it up. Sure the bolt up, but they aren't really meant for the large engines.

mach1metalhead · 02-16-2014, 09:58 AM

I wish it mattered, but the dude backed out of the sale so no 351 for me, yet...

4V FURY · 02-16-2014, 10:33 PM

Just as an aside, my friend just built a mild 351w based 408 for his 88 GT. It is a pump gas, stock block with a mild hyd. roller cam combo that has already put down 380/440 on a Mustang dyno. As soon as they figure out why it breaks up starting at 4500 I will post up the final numbers.

88BlkStngGT · 02-17-2014, 12:31 PM

Look for a later 351W from an F150 or Econoline van. I bought a complete 96 E250 service motor from my FRPP dealer for my build and it came with roller lifters and cam, plus complete fuel set up with 19lb injectors.

02-04-2014, 09:18 PM	#1
mach1metalhead Registered User Join Date: Oct 2007 Location: Orlando, FL Posts: 1,065	351 W hints, tips, etc. Anyone have experience with Ford 351s? It's an '80s (not sure what year exactly) Windsor. Comes with 302 heads, but I'm not contracted to those (my boss offered to buy them, if I don't want them). I'm not sure what I want from it yet. FI would be neat, but I don't know much about the block and I don't need to add my own "speed hole". Kinda thinking individual carbs/throttle bodies would be fun, as well or instead. If you have any information, please help me out. __________________ 03 Mach (Auto) JLT RAI - 1/2" Intake Spacer - Mac longtubes - Mac Prochamber - Borla cat-back - PA Racing k-member - Energy Suspension motor mounts - Eibach Sportline springs - Eibach anti-roll kit - SPC caster/camber kit - Steeda X2 ball-joints - Steeda strut tower bar - Eibach 1" wheel spacers (rear only)

02-15-2014, 06:03 PM	#2
MAD_MACh1 Registered User Join Date: Mar 2010 Location: Wyoming, MI Posts: 425	Re: 351 W hints, tips, etc. Stock 351 blocks a much stronger than 302 blocks. So unless your going for mega power then don't worry about it. If they are true 302 heads they won't work on a 351w without modification. A 302 has 7/16 head bolts and a 351w uses a 1/2 head bolt. They make flanged sleeve to use a 351 head on a 302 but you'll need to drill out the hole to use a true 302 head on a 351. Most aftermarket 302/351 heads are drilled for 1/2 and they use the adapter on a 302. Cylinder heads are probably the most important thing on a 351w. A good running 351w needs a good head to reach it's full potential. What's good for a 302 will only be ok on a 351 do the extra cubic inch. They become even more important on a stroked setup. I personally like the Dart Pro 1 195cc heads. AFR would also be a good choice. Fuel injection is nice but it gets hard to find a good intake for a stroker due to the air volume needs. TFS-R or Victor Jr would be my choice. Headers will also be important. Again the large cid require better flow. From my experience most people that are unhappy with a 351 have used a lot of 302 parts to build it up. Sure the bolt up, but they aren't really meant for the large engines. __________________ SLP Long tubes and O/R X pipe, Magnaflow cat back, K&N CAI, PHP intake spacer, 01 Cobra intake cam, 4.10s

02-16-2014, 09:58 AM	#3
mach1metalhead Registered User Join Date: Oct 2007 Location: Orlando, FL Posts: 1,065	I wish it mattered, but the dude backed out of the sale so no 351 for me, yet... __________________ 03 Mach (Auto) JLT RAI - 1/2" Intake Spacer - Mac longtubes - Mac Prochamber - Borla cat-back - PA Racing k-member - Energy Suspension motor mounts - Eibach Sportline springs - Eibach anti-roll kit - SPC caster/camber kit - Steeda X2 ball-joints - Steeda strut tower bar - Eibach 1" wheel spacers (rear only)

02-16-2014, 10:33 PM	#4
4V FURY Lite Poster Join Date: Feb 2004 Location: ohio Posts: 1,382	Re: 351 W hints, tips, etc. Just as an aside, my friend just built a mild 351w based 408 for his 88 GT. It is a pump gas, stock block with a mild hyd. roller cam combo that has already put down 380/440 on a Mustang dyno. As soon as they figure out why it breaks up starting at 4500 I will post up the final numbers. __________________ SOLD COMPETITION ORANGE 04 MACH1 Naturally Aspirdated Boss330 heads/cams/intake + VT 324" shortblock 11.34 @ 125.62 on ET streets CRT-PERFORMANCE tuned Congrats to Redliner who has taken it to a best ET of 10.97 @ 124

02-17-2014, 12:31 PM	#5
88BlkStngGT Registered User Join Date: Jan 2013 Location: NW Ohio Posts: 126	Re: 351 W hints, tips, etc. Look for a later 351W from an F150 or Econoline van. I bought a complete 96 E250 service motor from my FRPP dealer for my build and it came with roller lifters and cam, plus complete fuel set up with 19lb injectors.

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