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Brad Vinkemeier 01-08-2013 22:11:20 174.230.192.209 Report to Moderator	This message is a reply to an archived post by buickanddeere on February 03, 2009 at 19:41:14. The original subject was "Re: john deere 70 730 diesel". what about if u have the 730 head poted and polisded cleaned up the bowels larger valves manifold port blending all done which head will flow more the 730head or the same work done to a 70 head [Reply]   [No Email]
buickanddeere 01-09-2013 12:09:10 216.183.134.197 Report to Moderator	Re: john deere 70- 730 diesel in reply to Brad Vinkemeier, 01-08-2013 22:11:20   Which 70 head? The original 70 heads used smaller valves and tended to crack. Most were replaced with 720 heads. [Reply]  [No Email]
Brad Vinkemeier 01-09-2013 13:13:17 174.230.192.209 Report to Moderator	Re: john deere 70- 730 diesel in reply to buickanddeere, 01-09-2013 12:09:10   Buickanddeere i also was wondering how do u fit 820 or 830 intake valves in a 730 head its darn tight as it is i do not know whe how much bigger the 820 intake valves are and what do u do with the eyebrow on the one side do u just clean it up or do u remove it completely thanks for the information and ideas [Reply]  [No Email]
buickanddeere 01-09-2013 13:28:51 216.183.134.197 Report to Moderator	Re: john deere 70- 730 diesel in reply to Brad Vinkemeier, 01-09-2013 13:13:17   Careful measuring and grinding to remove a minumum of material. [Reply]  [No Email]
Brad Vinkemeier 01-09-2013 15:38:48 174.230.192.209 Report to Moderator	Re: john deere 70- 730 diesel in reply to buickanddeere, 01-09-2013 13:28:51   By how much bigger are 820 valves over 730 valves [Reply]  [No Email]
buickanddeere 01-09-2013 18:08:15 209.240.122.172 Report to Moderator	Re: john deere 70- 730 diesel in reply to Brad Vinkemeier, 01-09-2013 15:38:48   830 uses 2.075" and 2.605". The 70 uses 1-29/32" or 1.90" and 2-3/8" or 2.375" valves. So the intake valves will move out 115 thou farther. The exhaust valves will move out 87.5 thou. Ain't gonna run out of room. Valve size isn't everything. Cam timing, port blending and multi-angle seats are major players. The shape of the intake valve matters too. [Reply]  [No Email]
Brad Vinkemeier 01-09-2013 21:00:12 174.238.96.71 Report to Moderator	Re: john deere 70- 730 diesel in reply to buickanddeere, 01-09-2013 18:08:15   Yes i know but thanks for the specs i was planning on having that all done also thanks again [Reply]  [No Email]
diesel puller 01-09-2013 05:44:01 96.239.148.75 Report to Moderator	Re: john deere 70- 730 diesel in reply to Brad Vinkemeier, 01-08-2013 22:11:20   The 730 head part # 3511 for the simple fact that the injector tubes are casted in the 70 with 3211 head have brass inserts which will leak pain to deal with and $$$ [Reply]  [No Email]
Brad Vinkemeier 01-08-2013 22:16:50 174.230.192.209 Report to Moderator	Re: john deere 70- 730 diesel in reply to Brad Vinkemeier, 01-08-2013 22:11:20   What is back cutting the valves do also [Reply]  [No Email]