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Search found 981 matches

by travis
Sun Jan 19, 2020 7:21 am
Forum: Engine Tech
Topic: Sealers and thread lockers for final assembly
Replies: 1
Views: 28

Sealers and thread lockers for final assembly

What is y’all’s preference for screw in stud sealer or locker on aluminum heads, especially when shop/garage temps are close to freezing? I typically use some sort of PTFE sealer, but I rarely delve into the world of aluminum heads. These studs do not penetrate into the ports. I also ran out of red ...
by travis
Sun Jan 19, 2020 6:52 am
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

The companion to #1 is 6 on this as well. I tested all 4 corners and cylinder 6...all are very close (roughly .015” total variance best to worse). PR’s and spring shims are ordered. Then all I should need is headers and the correct distributor gear to wrap this thing up. I’ve got a couple more quest...
by travis
Sat Jan 18, 2020 8:33 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

Using the Straub method, possibly correctly this time, got me a PR length of 7.675” :lol: Add .025” of preload, and we are still looking at a 7.700” PR

Omg :lol:
by travis
Sat Jan 18, 2020 8:06 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

I’m going to try it again (hopefully correctly this time)...like I need more numbers bouncing around in my head right now!

Many thanks to you and everyone else for their help on this. Once I get some spring shims and PR’s, the rest of this “should” fall into place
by travis
Sat Jan 18, 2020 6:30 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

This is 9.5 turns on the adjuster, 7.670” PR. Creates .556” lift (not the most, but best tip pattern). This is on the base circle. Mid lift geometry is not perfect, but pretty good.

B7912D42-FB73-48B3-BF54-137EB627DF6D.jpeg
by travis
Sat Jan 18, 2020 6:08 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

7.670” PR length with no preload gives a nice centered and fairly tight contact pattern on the valve tip, so I think a 7.700” PR will do the trick as I usually use 1/2 turn of preload. This is with the scorpions. It will either work or I’ll be putting guides in this thing in short order. In any case...
by travis
Sat Jan 18, 2020 4:27 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

I will try that next.

In the meantime...E5AE head, crane conversion 3/8” studs, 6.5 turns on the adjuster, PBM rocker, 7.700” PR

F26FFADB-2224-439A-A20C-0F92AAB1CF22.jpeg
by travis
Sat Jan 18, 2020 3:33 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

Neither rocker looks right doing it this way...the PBM is too short trunion to tip, while the scorpion is quite a bit too long. Both pics are on the base circle. Is this one of the “joys” of cheap heads???
by travis
Sat Jan 18, 2020 3:26 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

PBM rocker, 3/8” stud, 6.5 turns on the adjuster...7.700” PR...

371E8CD0-B43E-47E9-9DF2-104E3DFC3565.jpeg

Scorpion rocker, 7/16” stud, 5.5 turns down...required 7.936” PR...

D03113A8-5A34-462A-BBBA-1F46CD7DB80F.jpeg
by travis
Sat Jan 18, 2020 2:11 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

The “in .050 increments” comment was based on my PR length tester (comp cams 7702), which measures in .050” increments. Let’s just add this to my recent string of WTF moments (which have been happening more and more lately). I watched the Straub video 2 or 3 times before trying it that way, and stil...
by travis
Sat Jan 18, 2020 12:08 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

Hmm... I’ve checked 4 local Lowe’s and Home Depot’s and found nothing remotely close. I guess I can check some of the smaller places today... You think the setup in the pics is too long? The pic with the straight edge is at mid lift, and actually needed another .050” for the“perfect” parallel lines ...
by travis
Sat Jan 18, 2020 7:42 am
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

..... how I do it with hyd lifters is, I use very light checking springs and I fill the lifter with oil. The springs are light enough to not compress the lifter at all. Do you have a part number for these super light springs? I now have 3 pairs of test springs from different companies that all appe...
by travis
Sat Jan 18, 2020 6:25 am
Forum: Engine Tech
Topic: Broken bolt removal out of a sbf timing cover
Replies: 1
Views: 146

Broken bolt removal out of a sbf timing cover

I’m cleaning up the remainder of the external bolt ons for my 351w, and as is typical on the timing covers on these things, most all the water pump bolts broke off upon removal. Typically I can get the broken off bolts out with some penetrating oil and working them back and forth with a pair of vice...
by travis
Fri Jan 17, 2020 6:55 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

Pics at 7.600” PR length...

CB20CAD3-C106-4B23-AE09-34C89FC64B7A.jpeg
6ECCF0F3-6169-4422-968A-40CA1E6D59A4.jpeg
20C84957-E68D-4C9A-B4FE-54A6CDA5CED5.jpeg
4CC86166-A0A6-4993-A51D-3176F816DA9D.jpeg
by travis
Fri Jan 17, 2020 6:53 pm
Forum: Engine Tech
Topic: Measuring for pushrods...part deux
Replies: 45
Views: 934

Re: Measuring for pushrods...part deux

It’s possible that that particular aftermarket head doesn’t really have all the placements and angles properly sorted out. I think this pretty well sums it up. The scorpions tip is better centered on the valve tip at mid lift on my D0OE iron heads with the right pushrod length for best geometry. I ...