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Author Topic: Pushrod length with TFS-11R's on stock block  (Read 3810 times)
David Claflin
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« on: February 14, 2018, 11:39:15 am »

with link bar lifters, standard base circle hydraulic roller cam, comp 1.6 pro magnums. I got 7.1", was surprised at the length. Used this method detailed in the video, then put marker on the valve tip and it's pretty centered, smudged a little from when I took the rocker on and off.
And yes, I have clearance between the pushrod and back of rocker arm fulcrum.  
https://www.youtube.com/watch?v=o5is9BsH5OU&t=619s


* IMG_1783.JPG (2153.1 KB, 4000x3000 - viewed 267 times.)
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1990 Red LX, 306, 80MM, ported gt40's, ported explorer upper accufab longtubes, 3" exhaust, 4.30's, 336/331
1985 LTD LX 347, 205 11R's, TFS-R, 90MMTB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
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« Reply #1 on: February 14, 2018, 11:49:42 am »

Doesnt matter what method you use, they lead to the same place, much like a road map. 7.100 is the most common length on an 8.2 deck because of the new valve angle compared to the old wedge heads.

11r with 11 and 13 degree valve angles use a longer pushrod than the old wedge at 17 and 15 degree valve angles.
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David Claflin
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« Reply #2 on: February 14, 2018, 01:22:24 pm »

Doesnt matter what method you use, they lead to the same place, much like a road map. 7.100 is the most common length on an 8.2 deck because of the new valve angle compared to the old wedge heads.

11r with 11 and 13 degree valve angles use a longer pushrod than the old wedge at 17 and 15 degree valve angles.
Thanks, I didn't go through the process on the exhaust, just popped the checking pushrod into exhaust and tried it, seemed in the sweet spot so figured it would be OK.
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1990 Red LX, 306, 80MM, ported gt40's, ported explorer upper accufab longtubes, 3" exhaust, 4.30's, 336/331
1985 LTD LX 347, 205 11R's, TFS-R, 90MMTB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
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« Reply #3 on: February 14, 2018, 02:02:07 pm »

Move the pushrod lengths in increments of .050 now and play around. You might find the sweep tightens up before it goes sideways and gets larger
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Make sure you get your information from the internet gurus that haven't built SHIT, they did sleep at Holiday Inn last night, and we have a few of those gurus right here on this forum. Smiley
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« Reply #4 on: February 14, 2018, 02:03:24 pm »

This makes sense. There was someone on the YB a few weeks ago. He was building a Windsor with 11R heads, and was coming up with pushrod lengths that seemed abnormally long.
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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

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You might need some Titanium rods and a flow bench!  LMAO on floor

I honestly don't get it.

I'm sweating, my heart is racing, my clutch foot is twichin', and my right arm punched the computer screen doing an involentary 2-3 shift while reading all that. 
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« Reply #5 on: February 14, 2018, 02:07:32 pm »

When you move the angle of the valve towards to lifter, pushrod is shorter, when you stand the valve up towards the header, the pushrod gets longer

Old wedge and 8.2 was 6.700
New wedge and 8.2 is 7.100
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331-347 Short Blocks 2099.00 and up
408-418-427 Short Blocks (F4 Roller Blocks Standard) 2399.99 and up
Dart Shorts 4199.00+
D.I.Y Shortblocks 1799.00

FordStrokers.com

Make sure you get your information from the internet gurus that haven't built SHIT, they did sleep at Holiday Inn last night, and we have a few of those gurus right here on this forum. Smiley
David Claflin
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« Reply #6 on: February 14, 2018, 03:32:13 pm »

Move the pushrod lengths in increments of .050 now and play around. You might find the sweep tightens up before it goes sideways and gets larger
I'll give it a whirl, thanks.
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1990 Red LX, 306, 80MM, ported gt40's, ported explorer upper accufab longtubes, 3" exhaust, 4.30's, 336/331
1985 LTD LX 347, 205 11R's, TFS-R, 90MMTB, MAC 1 3/4" longtubes, 4R70W, mach 1 brakes
1988 GT long term project
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