351w build up need advice - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 8 (permalink) Old 01-25-2003, 08:16 PM Thread Starter
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351w build up need advice

what do you guys think about my combination. 351w .030, zero decked. stock rods with arp bolts. kb hyper flat tops with moly file fit rings. 9 3/4:1 compression ratio. stock crank cut .010 on main and rods. melling hv oil pump with 7 qt pan. heads will be 74 351w castings carefully home ported with 1.94 and 1.60 valves. the car is a 68 mustang with c4 and shift kit. it will see the drag strip on the weekends. my question is what kind of power is this combination capable of and with what cam. i dont care how radical the cam as long as i can keep it under 7000 rpms. also what would make best choice for an intake performer rpm or victor jr. any thoughts, advice or suggestions would be great.
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post #2 of 8 (permalink) Old 01-25-2003, 09:54 PM
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351w build up need advice

I would run a standad volume oil pump. The RPM would be the better choice for the intake.If you don't mind checking valve lash, I'd throw a solid lifter cam in the thing. 235 to 245 @.050/.550 lift. This is a solid combo. What gears and converter are you going to use?
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post #3 of 8 (permalink) Old 01-25-2003, 11:12 PM
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351w build up need advice

I really would recommend not to use the square bolt passenger car rods.I have seen many dead ,stock 351 W with broken rods, always with square bolts.
Also built one 351 W, took it to 7000 for the first time and the motor exploded for this same reason.
ON THE OTHER HAND I had a set of HD/ Marine football bolt head stock rods with ARP bolts in my 450 horse Windsor.No problem with those rods, once even drove 30 seconds or so at 7500 rpm....
I do not claim this is the absolute truth in this case, perhaps somebody has had a better luck with stock rods but while you´re at it why dont just use the HD rods.Maybe the rods you have are those?

-80 Fairmont Futura Street.408 W+6spd+9 ".11.006/126,7mph.167 mph standing mile.All steel, NA.
-66 Fairlane GTA 390 tripower near completed.
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post #4 of 8 (permalink) Old 01-26-2003, 10:20 AM Thread Starter
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351w build up need advice

well im running 4.11:1 gears and i havent chosen a converter yet but it will probably be around 3000 rpms depending on cam selection. i would prefer solid lifter cam. now as for rods i have heard many stories about the passenger rods and they were all fine under 6000 rpms but you guys are right i should run a stronger rod. like i said i wont be turning anything over 7000 rpms. what rods should i run that would hold true for my application and where can i get them. thanks for the help.
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post #5 of 8 (permalink) Old 01-26-2003, 05:43 PM
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351w build up need advice

I do not know much on windsors, but I would have to take a guess, and make a suggestion as to ditch the heads. You have a pretty low Compression ratio, and in order to turn 7000 RPMs you are going to have to use a pretty decent sized cam with atleast 245-250 degrees at .05". At 7000 RPMs a lot of lift, nice headers, and compression I bet you make pretty decent power. Not to sure on this either--but why not opt for some Aluminum heads? fairly cheap from what I understand, and run a higher compression with less headaches of pinging

Hopefully someone with more insight can enlighten us both

Jeff Given
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post #6 of 8 (permalink) Old 01-26-2003, 06:29 PM Thread Starter
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351w build up need advice

how about windsor jrs or roush 200s
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post #7 of 8 (permalink) Old 01-26-2003, 06:54 PM
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351w build up need advice

I went to Summit's store today in Ohio....after checking out all the heads on display....ford/chevy bb/sb TRICK FLOW is hands down the best heads on the market!!! Anyone else who has seen all the ford heads lined up together would know what I'm talking about.

They did have a "open box display" world casting assembled head sitting on one of the "please buy me" discount/reject racks for $200.........I couldn't even get my thumb in the exhaust port
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post #8 of 8 (permalink) Old 01-26-2003, 07:55 PM
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351w build up need advice

Factory small block heads were designed back in 1961 for a 'commuter car' 221ci engine, and didn't change much through the years as the engine size grew.

Factory heads are too small for a warmed over 302, let alone a 351. That engine won't make significant power above 5k rpm until it gets a good set of heads. They don't need to be 'race' heads, just someting decent from the aftermarket.

If you are saying the TrickFlow heads are HUGE compared to the World Products, you're probably looking at the TrickFlow 'R' head, or maybe the re-released hi-port. The 'R' takes special headers and pistons, but is a good 'race' head. The hi-port is a nice piece, but the exhaust ports are raised around 3/4", so most headers won't fit. Back in the day when this was 'the' head to have, most companies offered headers specifically for these heads in most chassis.

Just go with about any decent aftermarket head, and you'll be fine. Just be SURE to check the rocker geometry!

Good Luck!
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