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#21
04-27-2023, 08:59 PM
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Off to the machine shop
Done as much as I'm going to do. Thanks for the help.
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#22
04-27-2023, 09:11 PM
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Looks good!
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| The Following User Says Thank You to PAUL K For This Useful Post: | ||
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#23
04-27-2023, 09:32 PM
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Thanks Paul K. I have gained a lot of respect for those who do hand porting. Oh my gosh, the time, diligence, and patience that is required is beyond my comprehension. I tried my hand some time ago on a set of 71 #96 heads per Hand's book. I made it thru about 90 - 95% on one head and had to throw in the towel. Time and patience are not better virtues for me. Thanks for being kind!
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#24
04-28-2023, 06:25 AM
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Ok, good!
So now with that 1.61" or so valve sitting on top of the valve guide you now have more area there then what a stock D port head would have had if it came from the factory with a 2.11" valve . This will pick up your high lift flow now, if the short turn arc is right,besides the lower lift flow gain from the valve job that was done. I would still Emplore you to do everything possible to get one cylinder flow tested because if you have a turbulence issue now which is possible you will find this out from the flow test, and spending another 5 minutes of of guided rework on the short turn of each Intake bowl will get rid of that issue. This will get you the added high lift flow that then should have from the area you now have in the bowl. Here's a few shots of big work! This is a head that has been set up for 2.14" intakes and that's a 1.850" template down in the valve bowl of a #62 head, and the rest of the port has been opened up to geometricly compliment that valve bowl throat area.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 04-28-2023 at 06:33 AM. |
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#25
04-30-2023, 09:08 PM
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I have flattened out the short turn radius that very closely matches the template radius of 1.60. From here I will try to get flow numbers, as now I'm curious.
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#26
05-01-2023, 08:13 AM
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Hold on now, your not done just yet !
Get a 60 grit floor sanding roll and tare / cut it into strips 1/2” wide and 12 to 14” long. Then like in my photo run it back & forth ( sawing motion ) over any of the short turn area you reworked.. Your looking for no more then 1/32” of ruffness along with a good blend when your done. Here are some flow numbers to reference to if you are able to get a flow test done on them. The first column is a stock number 15 with its 1.96” valve. The second column is a stock 1971 96 casting with its stock 2.11” valve and its stock 1.60” throat. Flow test @ 28” .050”. 41.4. 39.5 .100”. 75.9. 75.8 .200”. 139. 135.3 .300”. 173. 177.5 .400”. 180. 198.8 .450”. 181.3. 203.7 .500”. 183.8. 206 .550”. 208.4 .600”. 209.8
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#27
05-01-2023, 11:03 AM
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Oh man, yer killin' me here! LOL. Seriously I appreciate your help and advice. I'll do it.
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#28
05-01-2023, 11:59 AM
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It’s only another hour at most to get all 8 intakes done, then pop a cold one to toast!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
| The Following User Says Thank You to steve25 For This Useful Post: | ||
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#29
05-03-2023, 08:46 PM
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Took the liberty of flattening out the pushrod bumps while we're at it.
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| The Following User Says Thank You to 433lemans For This Useful Post: | ||
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#30
05-04-2023, 05:54 AM
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Nice work!
Cheers!🍻 Note that in post 26 the last two flow numbers given at .550" and .600" where for the #96 casting.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#31
05-04-2023, 02:35 PM
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While we're at it here is what the machinist did to one of the intake valves out of the set I sent with the heads, the one on the left. New old stock TRW Ram Air replacement valves.
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#32
05-04-2023, 04:33 PM
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The one on the right in your photo looks like the stock one which has a 30 degree seat and has the much needed margin before the face / chamber side of the valve.
The one the left looks to be modified to a 45 degree seat and then back cut some, but the bad thing is that it has no margin . A margin is needed to 1) help a flow cone form around the perimeter of the valve and 2) have a stable flow cone. A margin is also needed so that the thin area does not over heat and burn. Also was only one valve done this way, I don’t follow?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#33
05-04-2023, 06:11 PM
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Yes, he only did one to show me what he wanted to do, I guess instead of talking to me first. Wish he would have talked to me about the head work first! So now I suppose I'll have to find another valve?
Last edited by 433lemans; 05-04-2023 at 06:26 PM. |
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#34
05-10-2023, 05:44 PM
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Quote:
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#35
05-10-2023, 05:45 PM
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Great job.... You should be proud!
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| The Following User Says Thank You to PAUL K For This Useful Post: | ||
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#36
05-10-2023, 06:15 PM
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Good numbers he got you and you tweaked up with your detailing work!
It’s was worth it all, no? Looks like over all up to .500” lift you have a 73.5% exh to intake ratio. If your going to run headers then that would be increased to about 77% which is where I might start to think about a single pattern Cam if you do not have one already in hand, that is unless your final compression is going to be 8.5 or less.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#37
05-10-2023, 07:13 PM
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I'm happy! And thanks for the coaching. I wouldn't have gone this far with these heads without it quite honestly. Worth it!
I have headers for it. I have two cams currently: Lunati 10510704LK Speedpro CS-1175R that I purchased recently from a member here. I also have Crower springs 68404 and retainers. |
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#38
05-24-2023, 10:05 AM
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In relation. To the reversion talked about at the beginning of this thread check out this video and specifically his talk about reversion.
https://youtu.be/mQwon4Gfzfo
__________________
Happiness is just a turbocharger away! 960 HP @ 11 psi, 9.70 at 146. Iron heads, iron stock 2 bolt block , stock crank, 9 years haven't even changed a spark plug! selling turbos and turbo related parts since 2005! |
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