kingcab Posted August 31, 2008 Share Posted August 31, 2008 How much can I turn up the burst pressure on the injectors any one know? Have heard it would give a little more performance butt how much difference is it? Gonna put new nozzles in my injectors Link to comment Share on other sites More sharing options...
sw Posted August 31, 2008 Share Posted August 31, 2008 (edited) you add shims inside the injector body. but without an injector burst pressure tester i would not go adding shims willy nilly. Edited August 31, 2008 by sw Link to comment Share on other sites More sharing options...
sw Posted September 1, 2008 Share Posted September 1, 2008 link heres a link to the layout of a td42 injector so i would think a td27 injector is just a bit smaller again i think it would be unwise to start playing with the pressures without a pressure tester Link to comment Share on other sites More sharing options...
kingcab Posted September 1, 2008 Author Share Posted September 1, 2008 link heres a link to the layout of a td42 injector so i would think a td27 injector is just a bit smaller again i think it would be unwise to start playing with the pressures without a pressure tester Damn did i say i would change the injector nozzles my self? Allready got the layout on the injectors but thanks anyway according to my Factory workshop manual the burst pressure on the injectors should be from 103-112.8Bar so how much would be wise to go up from that? Link to comment Share on other sites More sharing options...
sw Posted September 1, 2008 Share Posted September 1, 2008 (edited) no sweat, sorry for miss understanding you i can only speculate about a figure but i have, a few times, seen 1600/1650 odd psi quoted, so 115-ish bar Edited September 1, 2008 by sw Link to comment Share on other sites More sharing options...
argo Posted December 8, 2008 Share Posted December 8, 2008 you have a service manual?? I'm trying to find the valve clearance spec for my 1991 TD27. please can you help me? I would not exceed the recommended cracking pressure out of consideration for the injector springs and possibly retarding the timing of commencment of injection. cheers, mike Link to comment Share on other sites More sharing options...
sw Posted December 9, 2008 Share Posted December 9, 2008 you have a service manual?? for a gu patrol, with td42 I'm trying to find the valve clearance spec for my 1991 TD27. please can you help me? no, i only have the specs for a different engine in the family. i might have a poke around and see if i can find anything. I would not exceed the recommended cracking pressure out of consideration for the injector springs and possibly retarding the timing of commencment of injection. why, i have never ever once heard of adverse affects of both raising opening pressure & advancing timing? - (within reason, obviously) Link to comment Share on other sites More sharing options...
sw Posted December 9, 2008 Share Posted December 9, 2008 (edited) googled td27 valve clearance got one answer at 14 thou exhaust & inlet. funny, same as the td42. prehaps give that a try Edited December 9, 2008 by sw Link to comment Share on other sites More sharing options...
argo Posted December 10, 2008 Share Posted December 10, 2008 I googled it as well . the only result I found was "from memory they are .014.........." It is quite likely correct, but I'm not at all keen on trying out something from someone's "memory" .Thanks all the same for the consideration. I am much more at ease with definite spec from genuine service literature. Hence my post inquiring here. If anyone happens to have a service manual for a Nissan TD27t, I would be delighted to hear from them. As for cracking pressure,I don't believe exceeding any factory spec comes without a cost. Especially with regards to altering injection timing and it's effects on volumetric efficiency. Nissan spends millions of dollars on R&D in order find the best comprimise between longevity and performance. Even with 18 years experience as a factory trained diesel mechanic, I'm not comfortable second guessing the engineers at Nissan and possibly shortening the service life of my machinery. cheers, Mike Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now