ditchdiggerjcf Posted November 14, 2009 Share Posted November 14, 2009 Will the vg 30 bend valves if it breaks a timing belt, or is it what they call a no interference engine? Link to comment Share on other sites More sharing options...
Simon Posted November 14, 2009 Share Posted November 14, 2009 It is most definitely an interference engine. It will bend valves. If you're debating whether to change the t-belt or not, do it. Link to comment Share on other sites More sharing options...
beastpath Posted November 14, 2009 Share Posted November 14, 2009 yes it can, it IS an interference engine. some folks have got lucky though... Link to comment Share on other sites More sharing options...
Tungsten Posted November 14, 2009 Share Posted November 14, 2009 if you loose a timing belt, you will make valve soup Link to comment Share on other sites More sharing options...
rydsno Posted November 14, 2009 Share Posted November 14, 2009 if you loose a timing belt, you will make valve soup Yup. Link to comment Share on other sites More sharing options...
MY1PATH Posted November 14, 2009 Share Posted November 14, 2009 if you loose a timing belt, you will make valve soup I dono why, but I think that statment is firigin hilarious. I mean it would suck and its true but... its kinda funny too. Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 14, 2009 Author Share Posted November 14, 2009 I dono why, but I think that statment is firigin hilarious. I mean it would suck and its true but... its kinda funny too. well, it looks like I broke mine yesterday when I tried to start the engine. I mean literally right as I turned the key Are there any performance mods that can be done while the heads are off? Whay about aftermarket cams? Link to comment Share on other sites More sharing options...
Precise1 Posted November 14, 2009 Share Posted November 14, 2009 Damn!! If you didn't crank it much, there is a chance not much damage occurred. Maybe the belt jumped a few teeth? Unless you are positive things are mangled you might want to replace the belt then try to fire it up/do a compression check first, it's not much wasted work if you have to pull the heads and you might get lucky... Good luck!! B Yes, cams are available but can be a problem if the vehicle needs smog testing so stay with a very mild one if that is the case. Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 15, 2009 Author Share Posted November 15, 2009 Damn!! If you didn't crank it much, there is a chance not much damage occurred. Maybe the belt jumped a few teeth? Unless you are positive things are mangled you might want to replace the belt then try to fire it up/do a compression check first, it's not much wasted work if you have to pull the heads and you might get lucky... Good luck!! B Yes, cams are available but can be a problem if the vehicle needs smog testing so stay with a very mild one if that is the case. no smog tests in Arkansas. What about the cams from a 300zx? Are they a little hotter than the pathfinder cams? Link to comment Share on other sites More sharing options...
Precise1 Posted November 15, 2009 Share Posted November 15, 2009 Jim Wolf has cams, another source I can't think of right now, and I believe a couple of people have taken the stock cams in to be reground at custom shops... I don't know about the 300zx cams... B Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 15, 2009 Author Share Posted November 15, 2009 Jim Wolf has cams, another source I can't think of right now, and I believe a couple of people have taken the stock cams in to be reground at custom shops... I don't know about the 300zx cams... B I wonder how I could find out about the 300zx cams. I can get them for almost nothing. Link to comment Share on other sites More sharing options...
Tungsten Posted November 15, 2009 Share Posted November 15, 2009 i think they are the same cam Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 15, 2009 Author Share Posted November 15, 2009 i think they are the same cam Are you pretty sure about that? Where do they get the extra power for the 300zx engines? Link to comment Share on other sites More sharing options...
Precise1 Posted November 16, 2009 Share Posted November 16, 2009 I'm pretty sure the 300zx had different heads, but I'll wait for someone who is sure of their information. B Link to comment Share on other sites More sharing options...
Tungsten Posted November 16, 2009 Share Posted November 16, 2009 extra power could come from a different timing setting and higher octane gas Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 16, 2009 Author Share Posted November 16, 2009 (edited) extra power could come from a different timing setting and higher octane gas so we can all get the same power as a z car by adjusting our timing? Edited November 16, 2009 by ditchdiggerjcf Link to comment Share on other sites More sharing options...
Tungsten Posted November 16, 2009 Share Posted November 16, 2009 if you are talking about the same VG30E engine as used in the sports car then yes Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 16, 2009 Author Share Posted November 16, 2009 if you are talking about the same VG30E engine as used in the sports car then yes So if I bent a valve or two in my heads and am going to be building a set of heads, can I build a set off of the 300z to get more power for my pathfinder? Link to comment Share on other sites More sharing options...
Tungsten Posted November 16, 2009 Share Posted November 16, 2009 you can use the heads but i don't know if that will give you any power difference at all Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 16, 2009 Author Share Posted November 16, 2009 you can use the heads but i don't know if that will give you any power difference at all so back to square one. How do they get the extra power out of the vg30 in the 300z? Link to comment Share on other sites More sharing options...
Tungsten Posted November 16, 2009 Share Posted November 16, 2009 (edited) they had a few of those engines made for the sports car throughout various years VG30E VG30ET VG30DE VG30DETT etc... D means dual cams and T means turbo the most power ive seen out of a VG30E was about 160hp http://en.wikipedia.org/wiki/Nissan_VG_engine#VG30E note the lower torque and higher hp and vice versa which probably means different timing settings Edited November 16, 2009 by Tungsten Link to comment Share on other sites More sharing options...
GrimGreg Posted November 16, 2009 Share Posted November 16, 2009 There are various ways to change the output on an engine, different pistons, different stroke (longer/shorter rods), cams, timing, etc. That said, I don't know what differences they made, but the early 300zx has the exact same block and head asour truck's engines. I do know that some VG30s had a different crank, but I think the only difference was how far it stuck out the front of the engine block. I have a whole book for hopping up L series Nissan engines, wish I had the same for the VG series. Link to comment Share on other sites More sharing options...
ditchdiggerjcf Posted November 16, 2009 Author Share Posted November 16, 2009 There are various ways to change the output on an engine, different pistons, different stroke (longer/shorter rods), cams, timing, etc. That said, I don't know what differences they made, but the early 300zx has the exact same block and head asour truck's engines. I do know that some VG30s had a different crank, but I think the only difference was how far it stuck out the front of the engine block. I have a whole book for hopping up L series Nissan engines, wish I had the same for the VG series. What about some port work then? Any help there? Gotta be something to do while I have the heads off. Link to comment Share on other sites More sharing options...
Tungsten Posted November 16, 2009 Share Posted November 16, 2009 i wouldn't mess with it because then you will have to take the entire engine apart again if something goes wrong if you want more power, its more worth it to put a v8 in there or a vg33e Link to comment Share on other sites More sharing options...
GrimGreg Posted November 16, 2009 Share Posted November 16, 2009 What about some port work then? Any help there? Gotta be something to do while I have the heads off. You can, but don't smooth them, the rough surface helps cause turbulence the air/fuel need to mix (at least this is what I read once from someone who had fully polished theirs). But opening up the intake and exhaust where they meet the manifolds isn't a bad idea. 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