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Search found 515 matches

by 62Ranchero200
Tue Aug 11, 2020 8:29 am
Forum: 144-250 "Small Block" Six Performance
Topic: Fuel pressure drops from 7# to 3# in 5 minutes of driving
Replies: 9
Views: 501

Re: Fuel pressure drops from 7# to 3# in 5 minutes of driving

Bill,

Any chance you’re experiencing vapor lock, since it’s so hot this time of year?

Thanks
Bob
by 62Ranchero200
Wed Aug 05, 2020 9:25 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bill,

I went to #72 jets and drove around the neighborhood. AFR is a bit lower than before but still 16+at low RPM, for example 1750 RPM @ 30 mph in third gear. At higher RPM (like 30 mph in second gear) AFR is ok.

Time for #34 idle jet? #73 main jets?

Thanks
Bob
by 62Ranchero200
Sun Aug 02, 2020 12:50 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bill, On my short drive, I was cruising at 20 - 40 mph (20 in neighborhood, 40 on four lane road), and never got up to 50 yet. At moderately higher RPM (as you would have just before shifting to a higher gear), AFR was OK. At lower RPM AFR was 16+. One small correction to a previous post - I forgot ...
by 62Ranchero200
Sat Aug 01, 2020 5:32 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bill, I’m using Joe Gibbs oil (BR-1 now and HR-1 after break-in). I’m using the same carb that you set up for me with the Quick Fuel metering block. I want to see how that runs with the cam and head changes before I upgrade. Currently, the idle AFR is good after it warms up and the part throttle AFR...
by 62Ranchero200
Sat Aug 01, 2020 1:02 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Hi Bill, As far as the TDC marker, do you mean put a mark on the timing pointer at the position where you want your initial timing? Using that, you could be near TDC between the exhaust and intake strokes instead of near TDC between the compression and power strokes (where you want to be). Since I h...
by 62Ranchero200
Fri Jul 31, 2020 10:38 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Started the engine ! - no significant issues

Yesterday, spun the oil pump drive shaft with a drill and brought the oil pressure gauge to 40 psi (spilled some oil through the distributor hole in the process). Yesterday, my copilot was watching the oil pressure gauge. After some initial difficulty, managed to stab the distributor at what I thoug...
by 62Ranchero200
Sun Jul 05, 2020 2:41 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Zero lash - initial adjustment, with new lifters, no oil in lifter

@bubba, Thank you for the tips about the strategies between 1/4 turn and a full turn beyond zero lash - but my question was more about zero lash itself. Setting initial lash with new hydraulic lifters, no oil in lifters - zero lash is set at TDC on the compression stroke, tightening the adjuster unt...
by 62Ranchero200
Fri Jul 03, 2020 7:22 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Initial hydraulic lash adjustment - lifters never run

Refresh my memory - just like measuring for pushrods, only an additional 1/4-1/2 turn after pushrod cannot move up and down?

No oil in lifters yet - only plunger spring pressure.

Thanks
Bob
by 62Ranchero200
Fri Jul 03, 2020 10:31 am
Forum: 144-250 "Small Block" Six Performance
Topic: 250 Block Evaluation
Replies: 16
Views: 1139

Re: 250 Block Evaluation

I noticed that you have very little deck height. Rods from a 300 (4.9) can be used in a 250 with custom short pistons to give near zero deck height (I have this setup with Autotec pistons and have .005 deck height). Measuring length of your rods could rule that out. Thanks Bob https://fordsix.com/im...
by 62Ranchero200
Sat Jun 27, 2020 7:19 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Current rocker arm / pushrod geometry: https://fordsix.com/img/_data/i/upload/2020/06/27/20200627144947-9786a20e-sq.jpg You can see that the pushrod is extremely close to the edge of the pushrod bore in the head. If I'm looking at it right, a shorter pushrod would move the pushrod even closer to the...
by 62Ranchero200
Sat Jun 27, 2020 2:53 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

HI Bob, from your description "you can't spin the push Rod" so you already have bottomed out the Hydrolic lifters piston. The valve spring pressure shouldn't even be a factor as you don't want the rocker arms adjusted down that tight. The Hydrolic lifters pistion should be all the way up ...
by 62Ranchero200
Fri Jun 26, 2020 10:29 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

@bubba, I was finally able to measure for new ball and cup pushrods yesterday. Transitioning to working from home (due to COVID-19, everyone in my company has been told to work from home until further notice) has required quite a bit of my time in the last week. We've also had a complete management ...
by 62Ranchero200
Sun Jun 21, 2020 3:23 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

@bubba, There's enough spring pressure in the Clay Smith hydraulic lifters that it's difficult to measure the plunger travel with calipers - I pushed a plunger down with a pushrod and it looks like about 1/4". Have the head installed: https://fordsix.com/img/_data/i/upload/2020/06/21/2020062115...
by 62Ranchero200
Wed Jun 17, 2020 2:17 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

:oops: Hi Bob, In my opinion that isn't nessisary or helpful for a couple reasons. Beyond cam break in lube on the cam lobes and the base of lifter plus a squirt or two of oil to the outside of lifter the body before installing them into the block is all that's needed the oil pump will take care of ...
by 62Ranchero200
Mon Jun 15, 2020 1:20 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

@bubba,

If I remember correctly, the last time I installed new hydraulic lifters, I placed them in a pan of oil and used a pushrod on the top of the lifters to pump oil into them before installing - is this necessary or helpful?

Thank you,
Bob
by 62Ranchero200
Sun Jun 14, 2020 12:05 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

'62 Ranchero - 250 - Aluminum Head update finally complete

Greetings Ford Six Fans, Last Friday, I finally received the aluminum head back from the machine shop. To remove the steel spring locator that must be removed to install the dual springs, the machinist ultimately had to drive all of the valve guides out, so he decided to replace them and regrind the...
by 62Ranchero200
Tue May 19, 2020 11:56 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Adjusting screws on CI/VI adjustable rockers - 1/2"-20
Replies: 6
Views: 468

Re: Adjusting screws on CI/VI adjustable rockers - 1/2"-20

@bubba, Maybe it’s a very early, long lost FE (like the 352) that used 1/2”-20 adjusting screws. I can’t find ANY of these, even of the same length, anywhere: Crane cams Comp cams Rock Auto Smith Bro’s Speedway Summit The puzzling thing is that I bought those adjustable rockers in 2014, so someone w...
by 62Ranchero200
Sun May 17, 2020 6:01 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Adjusting screws on CI/VI adjustable rockers - 1/2"-20
Replies: 6
Views: 468

Adjusting screws on CI/VI adjustable rockers - 1/2"-20

Greetings Ford Six Fans, I have a set of 1.6:1 stamped steel adjustable rocker arms from Classic Inlines/Vintage Inlines. The adjusting screw thread is 1/2"-20. It's a ball type adjusting screw for use with ball and cup pushrods. I was considering buying longer adjusting screws, but I can't fin...
by 62Ranchero200
Fri May 15, 2020 1:43 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bob Your numbers are good. Just looking at the cam by itself if you were to use a protractor you would see that there is 110 degrees between the exhaust and intake lobe centers. In this case you would be looking at the lobe peaks through your clear protractor sitting at the end of the cam. That ang...
by 62Ranchero200
Fri May 15, 2020 10:27 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

A couple of questions re: Clay Smith cam card

When it comes to camshaft timing events, I am challenged - no matter how much I learn about this or how many times I degree cams it remains confusing to me. So those of you who are more familiar or comfortable with camshaft timing, please help me answer some questions I am curious about. Let me say ...
by 62Ranchero200
Thu May 14, 2020 1:05 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

@wsa111, It was fortunate that the cam had the correct lift and duration, and only the timing needed to be corrected. If and when I am ready to step up to a solid lifter cam with more lift, I probably will go with another cam manufacturer, perhaps Schneider. Even if this hadn't happened, Clay Smith ...
by 62Ranchero200
Wed May 13, 2020 9:12 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

New Clay Smith H280 cam - degree results

Long story short, I degreed the new Clay Smith 280H cam and found it to be about 14 degrees retarded! After due consideration, I decided to advance the timing one tooth and the cam is now about 3 degrees advanced. Degree results in picture below: https://fordsix.com/img/_data/i/upload/2020/05/12/202...
by 62Ranchero200
Tue May 05, 2020 2:58 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Degreeing the cam
Replies: 4
Views: 593

Degreeing the cam

Just sharing some of my recent experiences on degreeing a cam on a small six: Doing this accurately is one of the most difficult things I have ever done. Head on or head off - from what I've seen, it's essentially no difference: at least with high lift cams, for me it was not possible to get an accu...
by 62Ranchero200
Wed Apr 22, 2020 4:21 pm
Forum: Aluminum Cylinder Head
Topic: Warning - upgrading from single to dual springs on aluminum head
Replies: 1
Views: 991

Warning - upgrading from single to dual springs on aluminum head

Greetings Ford Six Fans, My aluminum head (purchased from Mike Winterboer in 2013) came with single springs with dampers. This was fine for six years or so, as I was running a Clay Smith 274/274/108 cam with .300 lift (.480 lift with 1.6:1 rockers). On my 250 engine, this cam made HP up to 5,100 RPM...
by 62Ranchero200
Wed Apr 22, 2020 4:00 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

chad wrote:the head is still usable, Bob?


@chad,

The head is still at the machine shop having the steel spring locators removed. If the world doesn’t come to a complete standstill because of COVID-19, I do expect the machinist to eventually finish the head.

Thanks
Bob
by 62Ranchero200
Wed Apr 22, 2020 10:58 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

2 Ranchero - 250 - Aluminum Head update - in purgatory now

Greetings Ford Six Fans, I can't move forward with reassembling the engine until I get the new 280H cam. Clay Smith has "gone dark" - they're not responding to e-mails. It's anyone's guess if or when they will ship the cam I ordered in the era of COVID-19. If and when the machinist finishe...
by 62Ranchero200
Tue Apr 21, 2020 12:05 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

High lift, high duration solid lifter cams

Just for fun, I searched the Clay Smith, Comp Cams, and Schneider web sites for high lift, high duration solid lifter cams. After my dual spring upgrade, I should be able to handle at least .550 lift when I decide to go that direction. Schneider has two high lift, long duration solid lifter cams: th...
by 62Ranchero200
Tue Apr 21, 2020 10:32 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

You could have requested a 2 degree or a 4 degree advance when they ground it. That would save you the hassle of worrying about that on your 250. @wsa111, That's an excellent idea and I have in fact requested that it be ground four degrees advanced. After reviewing upper RPM range vs. hydraulic lif...
by 62Ranchero200
Mon Apr 20, 2020 4:43 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

I would cancel your order with Clay Smith & call Comp. Cams & get a profile which your engine needs. Comp. told me they have the cores & can fill your order in 2 weeks for a custom grind. Their # is 800-999-0853. I would ask for Matt @ extension 1496 he is very knowledgeable. Don't go b...
by 62Ranchero200
Mon Apr 20, 2020 11:35 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

I have never experienced the 280/280/110 cam with .320 lift (.512 at 1.6:1) So what you are saying is if you don't know what you are missing it will be alright? But I know what you would be missing and would be doing you an injustice to advise otherwise. What I'm saying is this cylinder head has gr...
by 62Ranchero200
Sun Apr 19, 2020 11:30 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

First, let me say that I can't describe the feeling of relief now that the cam has been identified. I couldn't understand why I couldn't degree the cam and come up close to the expected valve events for the 280/280/110. @pmuller and @wsa111, I hear what you are saying and you have some valid points ...
by 62Ranchero200
Sun Apr 19, 2020 5:03 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bob First off you did a great job checking the cam timing events! You were wondering why the .050" points were 9 degrees more than spec. Also the lobe lift was .285" instead of .320" They gave you CSC 280-09 HHP cam. 280/280, 238/238, .456" @ 1.6 which is .285" lobe lift. I...
by 62Ranchero200
Sun Apr 19, 2020 12:14 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

@bubba, As I understand it, the dual springs were originally an option on the aluminum heads when the heads were first sold by Mike Winterboer. I never heard that different valves were used for the dual springs, so I believe it's possible to install the dual springs with the original valves. My mach...
by 62Ranchero200
Fri Apr 17, 2020 5:07 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bob is the following correct? The installed height is already on the tight side. Adding more under the spring would be a problem. @pmuller, The installed height is perfect for the outer coil, but already tight for the inner coil because of the steel spring locator. Yes, anything more under either o...
by 62Ranchero200
Fri Apr 17, 2020 5:02 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Aluminum Head update - single to dual springs

:hmmm: Interesting Delma! Bob, how much needs to be machined off the valve guides lock rings outside Dia. for the inner springs to fit on the valve spring seats? As an alternative what about using a spring cup to bring the spring seats up to the same level of the guides retaining ring, or as a one ...
by 62Ranchero200
Fri Apr 17, 2020 1:43 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Aluminum Head - single to dual springs upgrade - the saga continues

Greetings Ford Six Fans, After my machinist talked with Matt Cox, it turns out there's another wrinkle in this. The valve guides on the CI/VI aluminum head include a step or ring to prevent the valve guide from sinking down into the softer aluminum of the head (pics from Matt Cox): https://fordsix.c...
by 62Ranchero200
Wed Apr 15, 2020 11:39 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

wsa111 was kind enough to supply a cutaway view of a stock head Note the cast-in spring locator. It appears that the insert was added to the aluminum head to duplicate the stock head for single spring applications and could be removed for double springs. https://i.imgur.com/WlbLkMj.jpg @pmuller, Ca...
by 62Ranchero200
Tue Apr 14, 2020 6:25 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Not a problem. First it looked like the locator was part of and the same material as the guide. Then your machinist verified that the locator is steel and the guide is bronze so they can't be one piece which means the steel locator was pressed on to the guide. Then I called the company that will be...
by 62Ranchero200
Tue Apr 14, 2020 5:07 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

May I ask a bit more on this? I just spoke to my machinist - he mentions that the valve guide is bronze, and the "insert" / locator in the perch area is steel. So, maybe that "insert" / locator came packaged with the valve guide, but how is it attached to the valve guide and doe...
by 62Ranchero200
Tue Apr 14, 2020 3:16 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Do not let the inner spring sit on the what you are calling the "Insert"!!! It is actually part of the valve guide. That is the part that must be machined flat to the rest of the spring seat area of the head. That is what Clay Smith's website is referring to. The spring is designed so tha...
by 62Ranchero200
Tue Apr 14, 2020 11:55 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Do not let the inner spring sit on the what you are calling the "Insert"!!! It is actually part of the valve guide. That is the part that must be machined flat to the rest of the spring seat area of the head. That is what Clay Smith's website is referring to. The spring is designed so tha...
by 62Ranchero200
Tue Apr 14, 2020 11:00 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Uncertainly re: installing dual springs - machine valve seats? Insert at base?

Greetings Ford Six Fans: I received some dual springs (CSC-TOY-SPG) and the machinist now has both the head and the dual springs. Reminder: the valve guides have already been machined .050 to give more clearance with the additional lift of the 280H cam. The machinist looked at the head (with the old...
by 62Ranchero200
Tue Apr 14, 2020 10:43 am
Forum: 144-250 "Small Block" Six Performance
Topic: Upgrading from single springs w/dampers to dual springs
Replies: 5
Views: 859

Upgrading to dual springs - machine valve seats?

I'm a bit surprised if no one has done this. Did everyone either order their aluminum head already with dual springs, or order it with single springs and never upgrade? The Clay Smith Cams web site mentions that the valve seats and valve guides should be machined to install these springs . I can see...
by 62Ranchero200
Mon Apr 13, 2020 5:15 pm
Forum: 144-250 "Small Block" Six Performance
Topic: Upgrading from single springs w/dampers to dual springs
Replies: 5
Views: 859

Upgrading from single springs w/dampers to dual springs

Greetings Ford Six Fans, For the last five years, I have been running single springs w/dampers with my 274H cam. I have some dual springs ( CSC-TOY-SPG ) that I would like installed on my aluminum head for my 280H cam. My valve guides have already been machined down about .050 to accommodate the hig...
by 62Ranchero200
Mon Apr 13, 2020 2:53 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

HI Bob, X2 on the head milling and push Rod lenght they should not be to short. You might be off on your lifter preload adjustment too, it's real easy to over tighten the new Hydrolic lifters when they are dry. Check your adjustment procedure see below link for info. Good luck :thumbup: :nod: Adjus...
by 62Ranchero200
Mon Apr 13, 2020 12:01 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

New issue: pushrods may be too short

Greetings Ford Six Fans, This is another head scratcher: my aluminum head was milled .056. Thinking about this, that should bring the adjusters on the rockers closer to the block and thus closer to the lifters, which should make the pushrods (Smith Brothers, custom length ball and cup) seem longer, ...
by 62Ranchero200
Mon Apr 13, 2020 11:56 am
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Unable to degree cam with head on

Greetings Ford Six Fans, After several hours attempting to do so, I was unable to degree the cam with the head on with the equipment that I had. Have adjustable rockers, and initially tried with the micrometer probe in the hex-shaped hole in the center of the adjuster. This may work with a lower lif...
by 62Ranchero200
Sat Apr 11, 2020 6:15 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Bob The advertised duration is NOT used to determine lobe center because the shallow slope at that point is inaccurate to read from. The .050" duration you measured is 231 deg and is what it should be. From your chart 7.5 + 223.5 = 231 Calculating intake lobe center: 231/2 = 115.5 115.5 - 7.5 ...
by 62Ranchero200
Sat Apr 11, 2020 6:05 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

Re: '62 Ranchero - 250 - Aluminum Head update

Hi Bob, of the Three Stock Ford US 250 Timing Chain Sets for our performance type of builds the preferred set is the 1969 to 1972 the info needed to ID' the early set (1969 to 1972) is listed below, see the section after the note that's hi lighted in Blue. Edited this post today 4/11/2020 to reflec...
by 62Ranchero200
Sat Apr 11, 2020 1:16 pm
Forum: 144-250 "Small Block" Six Performance
Topic: '62 Ranchero - 250 - Aluminum Head update
Replies: 164
Views: 13562

280H cam - preliminary degree results

Greetings Ford Six Fans, I degreed the Clay Smith 280H cam with the head off, and am uncertain of the results. The cam was new, never run (no wear on the lobes), with "CSC 280H-0-B" stamped on the rear. I purchased this cam from a forum member, who received it from Mike several years befor...

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