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www.ColoradoClassicBroncos.com - View topic - 351W Cam Options?
It is currently Mon Nov 25, 2024 10:21 pm



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 351W Cam Options? 
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Post 351W Cam Options?
I need a more appropriate cam for my 351

Engine specs:

1994 351W roller truck block (E4TE) bored .030" over
ProComp aluminum heads, 210cc runners
2.05/1.60 valves - 1.6 roller rockers
9.0:1 compression

The truck came with a Trick Flow Stage 2 hydraulic roller cam
SAE duration @.006" 286/294 Duration @ .050" 224/232
Lift @ valve w/ 1.6 rockers: 542/563 Lobe seperation 112°

With the current cam, the low end torque is sad at best. The advertised power band is 2600-6200rpm. I would like something with a powerband more like 1200-5000 rpm, with peak torque 2000-2400rpm. I found this cam which seems like it would fit the bill.

CompCams 35-510-8 Grind Number:XE258HR
SAE duration @.006" 258/266 Duration @ .050" 208/216
Lift .533/.544 Lobe lift .334/.341 Lobe seperation: 112°
Power Range: 1300 to 5300

I'm curious what you guys are using. Viper?

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
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Average 23.5 mpg, Best tank: 25.1 mpg


Thu Apr 21, 2016 6:34 pm
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Post Re: 351W Cam Options?
That's a little smaller than what I'm using.

Part Number:35-349-8 Grind Number: XE264HR
Lifter Type: Hydraulic Roller Lifter
Engine Family: Ford 5.0L 8 cyl. 1982-2001
Description: Hydraulic Roller-Mild Street performance, Good H.O. replacement cam. Works with O.B.D.1
Cam Family: Xtreme Energy™ Hydraulic Roller Camshafts, Computer compatible (E.F.I.) with O.E. hydraulic roller cams 1985-95
RPM Range: 1500 to 5500 Valve Lash: Hyd
Valve Timing: 0.006 Duration: 264/270
Lobe Separation: 114° Duration @ .050" Lift: 212/218
Intake Centerline: 110° Valve Lift: 0.512/0.512
Lobe Lift: 0.321/0.321

Here is a desktop dyno snapshot with my engine. I have GT40 heads now but you can see the benefit of going to better heads like the AFR165s.351w dyno.jpg


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Thu Apr 21, 2016 6:58 pm
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Post Re: 351W Cam Options?
I'm a little surprised that there's no real difference between the heads below 3500 rpm. Equally surprised at the size of the difference above that point.


Thu Apr 21, 2016 7:28 pm
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Post Re: 351W Cam Options?
That is great information and exactly the feedback I was looking for! Thanks!

Those cams are similar with the Comp Cams having less duration, but more lift. That chart makes a good argument for aftermarket heads and gives me hope of making near 450 lb-ft with my heads. thumbs up thumbs up

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:

Average 23.5 mpg, Best tank: 25.1 mpg


Thu Apr 21, 2016 7:36 pm
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Post Re: 351W Cam Options?

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:

Average 23.5 mpg, Best tank: 25.1 mpg


Thu Apr 21, 2016 7:40 pm
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Post Re: 351W Cam Options?
Those heads are a little large. You want a smaller runner to keep the velocity up for better throttle response and torque. Just another thing to keep in mind. Those heads would be good on a 408/427......

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Rob

74 Ranger EFI351w, 4r70w, ARB 5.13 9in, ARB 5.13D44, and a bunch of other goodies. Best of all the family memories.

04 Mustang Cobra, KenneBell 2.2 feeding a lot of boost on E85. Tire shredding machine

New project: 77 Bronco Ranger, body work and more body work.

Very little left of a 72 durango tan explorer sport


Thu Apr 21, 2016 7:45 pm
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Post Re: 351W Cam Options?
google desktop dyno 2000. there is a free download that will let you plug in all your numbers and play around.

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Rob

74 Ranger EFI351w, 4r70w, ARB 5.13 9in, ARB 5.13D44, and a bunch of other goodies. Best of all the family memories.

04 Mustang Cobra, KenneBell 2.2 feeding a lot of boost on E85. Tire shredding machine

New project: 77 Bronco Ranger, body work and more body work.

Very little left of a 72 durango tan explorer sport


Thu Apr 21, 2016 7:47 pm
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Post Re: 351W Cam Options?

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:

Average 23.5 mpg, Best tank: 25.1 mpg


Thu Apr 21, 2016 7:52 pm
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Post Re: 351W Cam Options?

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Rob

74 Ranger EFI351w, 4r70w, ARB 5.13 9in, ARB 5.13D44, and a bunch of other goodies. Best of all the family memories.

04 Mustang Cobra, KenneBell 2.2 feeding a lot of boost on E85. Tire shredding machine

New project: 77 Bronco Ranger, body work and more body work.

Very little left of a 72 durango tan explorer sport


Thu Apr 21, 2016 7:56 pm
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Post Re: 351W Cam Options?
A 460 will fit in an early Bronco, at least as well as a Coyote. stirpot

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Thu Apr 21, 2016 9:40 pm
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Post Re: 351W Cam Options?

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:

Average 23.5 mpg, Best tank: 25.1 mpg


Mon Apr 25, 2016 2:28 pm
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Post Re: 351W Cam Options?
Thanks everyone for your input. I got to drive the truck today with the new cam and it is so butter-smooth, I LOVE IT. Still has the same seat-of-the-pants power it did before, but now it idles @600 and can pull down to ~300rpm. I'm so much more happy with this setup. The exhaust doesn't smell so "fuelly" anymore, the transmission doesn't sound like a bag of marbles at idle and even 75mph highway cruising is more quiet.

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Cummins R2.8 diesel, ZF5, AtlasII, HP44/BB9, ARBs, coiled / linked suspension, 37" KO2s, full cage, bumpers, etc.
Build Thread:

Average 23.5 mpg, Best tank: 25.1 mpg


Tue Jun 21, 2016 8:27 am
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