Blower question
Blower question
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Laughing Gas
Joined: Jul 2001
Posts: 850
Likes: 14
From: Fayetteville, NC
Blower question
What are the differences between the 351M and the 351C?? I know the 351M has a big block bolt pattern for transmissions and appears to be a little wider than the Cleveland, but other than that I haven't the foggiest.
Freshman User
Joined: Jan 2003
Posts: 42
Likes: 0
Blower question
The main difference in this area is the deck height-the 351M's deck height is higher. This means that the heads are farther apart-there are spacers available from weind that will make up the difference should you use a 351C manifold on an M-block. If the blower is designed for 351C 4V heads then those are the heads that you would have to use on an M block with the blower because otherwise the ports would not match. The cleveland heads and the M heads are 100% interchangable. I have never heard of there being such a blower-could you show me where I could check it out? It could work out on an M-block if you got all the right things with it.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
Blower question
BDS also has a manifold and blower for the 351M/400 although I don't know if they sell it as a kit.
Differences between the 351M and 351C other than the bellhousing bolt pattern are basically the height of the block (M is an inch taller), larger diameter mains (M is same size as the 351W), a unique set of pistons with a taller comp. height to compensate for the increased deck height and the fact that the 351M was only available stock with a 2V intake and carb.
Differences between the 351M and 351C other than the bellhousing bolt pattern are basically the height of the block (M is an inch taller), larger diameter mains (M is same size as the 351W), a unique set of pistons with a taller comp. height to compensate for the increased deck height and the fact that the 351M was only available stock with a 2V intake and carb.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
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Elder User
Joined: Feb 2001
Posts: 829
Likes: 0
From: Porterfield
Blower question
I can see everyone ording one of these....
576-3S1/2 Ford 400M 3" 1V 871 Blower Kit
576-3S2/2 Ford 400M 3" 2V 871 Blower Kit
576-3S3/2 Ford 400M 3" 3V 871 Blower Kit
Ford 471, 671, and 871 blower kits are available for V8 engines. The year of manufacture for the heads must be supplied in order for BDS to supply the proper manifold. Special manifolds must be ordered for use with some after market heads. Due to the locations of the distributor, Ford motors require a Flat Cap style distributor (not supplied with kit) for proper manifold clearance. Accessory drive vee grooves are available for water pump, alternator, power steering, and air conditioning. Some factory brackets may need to be moved or modified for clearance of the blower system.
576-3S1/2 Ford 400M 3" 1V 871 Blower Kit
576-3S2/2 Ford 400M 3" 2V 871 Blower Kit
576-3S3/2 Ford 400M 3" 3V 871 Blower Kit
Ford 471, 671, and 871 blower kits are available for V8 engines. The year of manufacture for the heads must be supplied in order for BDS to supply the proper manifold. Special manifolds must be ordered for use with some after market heads. Due to the locations of the distributor, Ford motors require a Flat Cap style distributor (not supplied with kit) for proper manifold clearance. Accessory drive vee grooves are available for water pump, alternator, power steering, and air conditioning. Some factory brackets may need to be moved or modified for clearance of the blower system.
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Lead Driver
Joined: Nov 2000
Posts: 6,635
Likes: 349
From: Albuquerque
Blower question
Geesh! That's all I need is to start thinkin about another $3,000.00 project. Wasn't available a few years ago when I tried to do it. Now I've got too much compression most likely.
Elder User
Joined: Feb 2001
Posts: 829
Likes: 0
From: Porterfield
Blower question
OK it's my understanding that a good blower motor has 8 to 1 compression...... Is this right ????
Now Ford made the 400 a 8.8 to 1 comp. in it's final years so the hard part is done, just change the cam and timing chain set and you'll be on your way to a real Stump Puller With a blower attached.
Now Ford made the 400 a 8.8 to 1 comp. in it's final years so the hard part is done, just change the cam and timing chain set and you'll be on your way to a real Stump Puller With a blower attached.
Elder User
Joined: Sep 2001
Posts: 887
Likes: 1
From: Jax FL
Blower question
as they say here: "back in the day", when i was into sc, it was commonly stated that you want 8.0-9.5 for a cr. most people had around 8.5. i do know the drag guys run higher if they can.
but i gave all that thinking up, please done get me started again. its bad enough thinking about an aluminium block and heads.
but i gave all that thinking up, please done get me started again. its bad enough thinking about an aluminium block and heads.
New User
Joined: Feb 2003
Posts: 13
Likes: 0
Blower question
if you are theoretically going to run about 7psi out of the huffer, you will want around an 8:1 compression ratio in the engine. Get too much higher, you will need to have 4 bolt mains, and a super stout block.
Posting Guru
Joined: Aug 2000
Posts: 2,416
Likes: 4
From: PacNW
Blower question
OK...If I had the $$$ and time to build a blown 400 here's my recipe:
D7TE or D8xx block .030 max overbore
Closed chamber Aussie 302C heads ported & polished with 2.19/1.71 valves, machined for 7/16" rocker studs
stock rods beam polished with ARP bolts
custom forged 8:1 CR dished pistons set for zero deck comp. height
stock crank cross drilled with lead in grooves (10/10 max grind)
dual pattern hyd. roller cam & lifters max .550 lift
1.73:1 stainless roller rockers
BDS 871 blower & manifold 8 psi max boost
850 CFM carb
Depending on cam configuration I'd be willing to bet this combo could easily produce 800+ hp, still be fairly streetable and hold together at 7000 RPM for extended periods...more than long enough to make the big block bowtie boys wet their drawers.
D7TE or D8xx block .030 max overbore
Closed chamber Aussie 302C heads ported & polished with 2.19/1.71 valves, machined for 7/16" rocker studs
stock rods beam polished with ARP bolts
custom forged 8:1 CR dished pistons set for zero deck comp. height
stock crank cross drilled with lead in grooves (10/10 max grind)
dual pattern hyd. roller cam & lifters max .550 lift
1.73:1 stainless roller rockers
BDS 871 blower & manifold 8 psi max boost
850 CFM carb
Depending on cam configuration I'd be willing to bet this combo could easily produce 800+ hp, still be fairly streetable and hold together at 7000 RPM for extended periods...more than long enough to make the big block bowtie boys wet their drawers.
Post Fiend
Joined: Jan 2003
Posts: 10,323
Likes: 2
From: Montana Territory
Blower question
Would this blower work on a 351M too? I know there aren't hardly any differences. I was going to put cleveland heads on as soon as the weather got better, but this stopped me in my tracks.