20r and 22r exhaust valves.

Started by RN37DD, May 20, 2007, 08:22:06 AM

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RN37DD

May 20, 2007, 08:22:06 AM
 I just checked the exhaust valves for my 20/22r motor and it looks like they're 22r valves. 112.4mm short and the valve head is 36.9 mm. I though 20r exhaust valves were 113.5mm long. Question well I have a problem running these valves? Anyone know how long the exhaust valves are that LCengineering has for the 20r? when you look it up it just says 20/22r. The machine shop here says the exhaust valves are the same.. I'm running old 22r rockers too. Anything Else I should check??

79coyotefrg

#1
May 20, 2007, 08:57:41 AM
nope , looks like your good to go
AR-TTORA founder 22R bored.060,LCE stage II race cam http://pure-gas.org/    32/36weber, :driving: Marlin 1200 NON ceramic clutch, L52SHD+dualcase #2919, cable-locker, Yukon 5.29 gears, 35's, Allpro ebrake, front springs, and high steer, F150rears    RIP Nitro 9-29-07 :(  I sure miss him :down: MarlinCrawlerInc IS NOT affiliated with TrailGear in any way

RN37DD

#2
May 21, 2007, 01:05:09 PM
yeah i think i'm going to run them. valve springs might be a little tighter but the cam lift is only .430 max and it might even help at high RPM..

79coyotefrg

#3
May 21, 2007, 01:15:41 PM
actually  it does help  keep them tight,  make sure  your  valve seats match the valve,  the 20r seats  must be removed  and the 22r seats  installed   
gotta have a COMPETENT  machine shop
AR-TTORA founder 22R bored.060,LCE stage II race cam http://pure-gas.org/    32/36weber, :driving: Marlin 1200 NON ceramic clutch, L52SHD+dualcase #2919, cable-locker, Yukon 5.29 gears, 35's, Allpro ebrake, front springs, and high steer, F150rears    RIP Nitro 9-29-07 :(  I sure miss him :down: MarlinCrawlerInc IS NOT affiliated with TrailGear in any way

79coyotefrg

#4
May 21, 2007, 01:16:26 PM
btw  the cam i have is a .460 lift  :burnout:
AR-TTORA founder 22R bored.060,LCE stage II race cam http://pure-gas.org/    32/36weber, :driving: Marlin 1200 NON ceramic clutch, L52SHD+dualcase #2919, cable-locker, Yukon 5.29 gears, 35's, Allpro ebrake, front springs, and high steer, F150rears    RIP Nitro 9-29-07 :(  I sure miss him :down: MarlinCrawlerInc IS NOT affiliated with TrailGear in any way

RN37DD

#5
June 02, 2007, 05:59:40 AM
Too much $$ to put in the new valve seats at this time. going to order some over sized valve 20r from engnbldr.. That way I'll upgrade the intakes too.  Think i'll try their cam also.
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