Author Topic: 22R Hybrid valve clearance issues  (Read 1087 times)

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MrFatEggs

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22R Hybrid valve clearance issues
« on: Apr 02, 2017, 07:52:17 PM »
Hi, I am in the process of building a 22r hybrid motor, but I'm having trouble with the valves. I did the clay test and the intake valve is just barely kissing the piston. What can I do about that other than stacking headgaskets?
This is the motor:
20r head from 1980 corona
Delta 272 cam- 433 lift
Rocker arm assembly from 22r
22r valves and springs
1983 22r block
Block bored 40 over
40 over pistons

OVRAROK

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Re: 22R Hybrid valve clearance issues
« Reply #1 on: Apr 02, 2017, 08:02:27 PM »
you need to clearance the pistons
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MrFatEggs [OP]

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Re: 22R Hybrid valve clearance issues
« Reply #2 on: Apr 03, 2017, 10:34:26 AM »
How do I go about doing that?

H8PVMNT

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Re: 22R Hybrid valve clearance issues
« Reply #3 on: Apr 03, 2017, 12:15:21 PM »
Machine shop.  Shouldn't cost too much if you can find someone to do it.  I had a buddy that use an angle grinder but that's pretty sketchy :).

You could just run a stock cam and not have to worry about it.  Gnarls on here ran some pulls on a bunch of cam profiles on some kind of desktop dyno and the stock cam profile isn't exactly bad unless you are going with a really nasty cam.  The stock cam makes more bottom end, has a really broad torque sweet spot and wraps out pretty well too. I am running it in a 20r/22r hybrid and after some tuning with an adjustable cam gear and getting the carb freed up and dialed in I am fairly impressed with the whole setup over a stock 22r.  It's not a 3RZ but it's getting there.  I can tell you if this engine was in a smaller, lighter pickup or a car it would absolutely rip!


Here this thread has a whole bunch of spreadsheets in it that Gnarly posted up.  I think some of the later ones even had the 20r data in the hypotheticals:  http://board.marlincrawler.com/index.php?topic=100575.0
« Last Edit: Apr 03, 2017, 12:28:33 PM by H8PVMNT »
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MrFatEggs [OP]

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Re: 22R Hybrid valve clearance issues
« Reply #4 on: Apr 05, 2017, 03:06:13 PM »
I went ahead and used a grinding wheel on a dremel and took about the same amount of material off each side of the piston to keep it balanced, then repeated with the other 3. Thanks for the help!

H8PVMNT

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Re: 22R Hybrid valve clearance issues
« Reply #5 on: Apr 06, 2017, 03:43:32 AM »
I went ahead and used a grinding wheel on a dremel and took about the same amount of material off each side of the piston to keep it balanced, then repeated with the other 3. Thanks for the help!

I didn't really consider that one a good suggestion but I guess there's no reason it can't work.  The guy I knew who did it took a power washer to the pistons and deck after words to clean the dust off :).  Anyway it worked for him so I would guess it will work for you.  Good luck man you got balls!
I would rather wake up in the middle of nowhere than in any city on earth.
Steve McQueen

"Except for maybe Seattle."  -H8PVMNT

"I plan to hit 300k in this truck"  :)bestgen4runner

 "I'm jealous of your shop. It has concrete and doesn't smell like pickles like the old shop  "  300K

 
 
 
 
 

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