1971 F100 4x4 - Page 6 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #76 of 85 (permalink) Old 06-15-2013, 12:02 PM
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Re: 1971 F100 4x4

Excellent results
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post #77 of 85 (permalink) Old 06-15-2013, 03:25 PM
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Re: 1971 F100 4x4

Looks Great! Should be about two tons of fun! Are you still planning on putting a Dana 60 out back?
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post #78 of 85 (permalink) Old 06-15-2013, 03:35 PM Thread Starter
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Re: 1971 F100 4x4

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Originally Posted by Killgore View Post
Looks Great! Should be about two tons of fun! Are you still planning on putting a Dana 60 out back?
It had a 5-lug Dana 60 from the factory, but I like a 31 spline 9 inch better, maybe not better, but easier so I decided against it. The stock 60 had 30 spline axles, hard to get parts for and I haven't blown a 9 inch in it in a long time.

70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.
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post #79 of 85 (permalink) Old 06-16-2013, 11:07 AM
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Re: 1971 F100 4x4

looks good .......excellent work Ross..

%201964%20Galaxie/?action=view&current=09-03-10_1408.jpg Lars...
64 galaxie 500 2dr fastback...390 4v, Bendtsen adapter, maddog's stage3 700R4 trans,3.70 Posi..far from perfect but getting there...
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post #80 of 85 (permalink) Old 06-25-2013, 06:07 AM Thread Starter
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Re: 1971 F100 4x4

Thanks!

Taking it to its first "Cars and Coffee" this weekend in Omaha. The 445 is running strong, just door weatherstripping, a couple heater hoses, and seat belts to do this week to get it ready

Should be a good 50 mile round trip with a little cruise, good for the fresh motor.


70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.
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post #81 of 85 (permalink) Old 12-22-2013, 07:50 AM Thread Starter
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Re: 1971 F100 4x4

Well, an update on the 445, made it breathe a little deeper

The build is a 10:1 445 FE, with ported D2TE-AA truck heads flowing about 280 cfm, CJ undercut stem valves, ported RPM intake, 3310 Holley, 1 inch spacer, Hedman headers, dual 3 inch mandrel bent exhaust

Originally I put it together with stock hyd 1.73 rockers, with good shafts and end stands, and a 270H cam retarded to 110 intake centerline to let it live with the 10:1 compression. (270 adv, 224 @ .050, .519 lift, 110 LSA on 110 ICL)

It ran very strong, but I had an odd noise after a while, turned out to be a cracked lifter, something I hadn't seen happen before. Basically the cam was fine, but the lifter had a crack which was bleeding oil and making it clack and the oddest times.

So, I could have added a lifter and drove off, but I had it all apart and decided to go with more cam.

I went with a custom solid flat tappet tight lash Bullet cam, 282 adv, 236 @ .050, .580 lift, 112 LSA on a 104 centerline. The logic was to add some lift and duration, but have a very similar intake closing point as the hyd cam to manage dynamic compression, then spread the centers to keep overlap in check. At the same time I changed to Erson roller rockers, 1.76 ratio with needle bearing fulcrum

I expected some change but not much, the dyno programs said gains everywhere, but they typically are all over the place. However it worked out great

Trying to get a video, but the exhaust tone sort of drowns out my cell phone. The bottom line though is it feels like it revs looser and quicker, and despite a larger cam, it pulls harder everywhere, even in 4th at idle and will bang 6000 rpm in a heartbeat

So, success! The truck is probably a little to fast for its drum brakes and big heavy tires now so next step is probably a set of good disks up front.

Movie to come soon

70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.
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post #82 of 85 (permalink) Old 12-23-2013, 07:30 PM
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Re: 1971 F100 4x4

That is always great news. How many times do we spend money and actually go backwards. With 455" 's, i cant see the solid making less anywhere. Ive always been taught that when an engine is cylinder head limited, the cam shaft becomes even more important.

Did bullet pick that cam out for you? Ill be looking for a solid flat for my 427 soon.

Last edited by EXracer4speed; 12-23-2013 at 07:37 PM.
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post #83 of 85 (permalink) Old 12-23-2013, 09:02 PM Thread Starter
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Re: 1971 F100 4x4

No, I picked the lobes and the cam timing myself. Matter of fact, I calculated then verified the valve events based on different lash figures to get exactly the cam timing I wanted

I am pretty fussy, I have found the cam grinders hit general advice areas, not because they aren't knowledgeable, but more because they deal with such a wide range of people that it's easier to just get close enough.

So I tell them what I want exactly then verify

FWIW, there is more power in a narrow lobe separation, especially with smaller displacement, so although this is a great cam, there could be better depending on what you want it to do.

70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.

Last edited by My427stang; 12-23-2013 at 09:05 PM.
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post #84 of 85 (permalink) Old 12-24-2013, 07:17 AM
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Re: 1971 F100 4x4

You did a fine job! With that said, ill be sending you a pm.
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post #85 of 85 (permalink) Old 09-11-2016, 04:35 PM Thread Starter
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Re: 1971 F100 4x4

Well, I was bored yesterday and came up with a few videos to update the F100 and decided to revive this post from the dead

First video is the 8.5:1 396 FE with an SM, 750, no head work, headers, 270H and 3 inch duals, Flowmasters, and no crossover for reference. Ironically it sounds to be the meanest of the bunch, but wasmellow


Second video is the first one I made of the 445, 10:1 compression, ported D2s, ported RPM, 282/236 112/104 .580 lift Bullet SFT, 3310, mandrel bent 3 inch duals, X pipe, and Jones straight through mufflers (very much like a Magnaflow)

Third video is how it is now. No changes to the exhaust from above, but recently rocked the cam back a bit and lashed it much tighter, really liked it. Just idling here, but gets a good look at the truck. Sorry, time for a new cell phone, it just doesn't film very well


Decided to put it away for a bit and play with the Mustang, but next step for the truck is likely some rear suspension work, going to either 4 link it out back or adapt a more modern spring setup the allow a bit of squat. Right now the only flex with the HD Special springs comes from the sidewalls

At some point I'd like to swap to a transmission that I can shift quickly, right now its a NP435, but we'll see, no idea yet on that one. I'd really like a TKO, but need a mid-shift and a transfer case swap, not sure if I am going to do it or not



Edudu77 and RAGGAREN like this.

70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.

Last edited by My427stang; 09-11-2016 at 04:40 PM.
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