1uzfe vs VH45DE

Discussion in 'General Discussion' started by PaulfromPA, Mar 17, 2005.

  1. PaulfromPA

    PaulfromPA New Member

    Joined:
    Mar 17, 2005
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    bum
    Location:
    Lancaster, PA
    The only information on here that I found similar is: http://lextreme.com/forums/showthread.php?t=972&highlight=VH45 but that was over a year ago and hopefully people have more opinions since then.

    Oh by the way, hello my name is Paul and I'm from Lancaster, PA. I'm just dreaming of the next project car and I'm pretty sure I want to do something with the 1uz or VH45, so any info is helpful. Thanks.

    Paul
     
  2. Zuffen

    Zuffen Super Moderator Staff Member

    Joined:
    Jan 21, 2004
    Messages:
    5,150
    Likes Received:
    3
    Trophy Points:
    38
    Occupation:
    Retired Insurer
    Location:
    Sydney, Australia

    Attached Files:

  3. Pro

    Pro New Member

    Joined:
    Oct 20, 2003
    Messages:
    1,575
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    New Homes Designer / Draftsman
    Location:
    Republic of Western Australia
    i'd pick the 1UZ for it's superior top end.

    scissor gears and non-interference heads make for a true "peace of mind" performer - retarded cams et al.

    and they're narrower so they fit in more engine bays. :)
     
  4. Peewee

    Peewee Moderator

    Joined:
    Oct 16, 2003
    Messages:
    2,640
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Elec Eng
    Location:
    Perth, Western Australia
    Home Page:
    As I stated in the other thread;
    Comparing FACTORY setups, the VH4x series have better upper ends.
    However, the bottom end isnt strong.

    Being that a top end is somewhat cheaper to upgrade, the UZ provides a better base for performance.
     
  5. The Flea

    The Flea New Member

    Joined:
    Jan 26, 2004
    Messages:
    126
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Pilot
    Location:
    People's Republic of California
    Home Page:
    I'm a Toyota fan really, but I think the Nissan VH45 has a leg up on the 1UZ.

    My good friend just destroyed the production car land speed record set by the Nissan Factory Team in a 300ZX (226 mph). He has been flown all over the Western hemisphere tuning Z cars. Certainly an authority. We've spent hours examining the differences between the Q and the 1UZ

    The bottom end in the Q45 is 6 bolt like the 1UZ, but the main studs make the 1UZ studs look like tooth picks. It looks like something you would find in a 6-bolt Donavan, Brad Anderson, or some T/F engine. Of course, this is to accomdiate the over-built reciprocating assembly. The crank is forged, as are the rods, and you can clearly see the forging marks, (unlike ours). But, the pistons are considerably heavier, which explains the reason for the beefy bottom end. If I remember correctly the Q's were 30-50 grams heavier. They have a full skirt unlike the T shapes my 1UZ had.

    BTW, if you weren't concerned about the weight we could easily use the Q rods.

    The heads have a really wide valve angle. You can only see the tops of the valves looking down in the intake ports because they're canted out so much. The cams are independently adjustable (I really don't find this feature that compelling). The valves on the VH41 are titanium. The heads flow good aparently, but have the casting features to be pushed further than the 1UZ.

    I'm not down with the cam followers (like on the other Nissans) and this was a little bit of a disappointment for my friend as well. He thought the shim and bucket was far superior until high lift cams were used. Then the casting around the bucket possibly becomes an obstruction.

    With all of this said. How come the Q hasn't caught on yet? The 1UZ has already been in the 6's at over 200mph. Where's Nissan? (Insert cricket chirping noises here). Did you look at the engine homologation for the Grand Am series? http://www.grandamerican.com/CONTENT/Docs/PDF/approved engines 1-11.pdf The advantage was certainly given to Nissan, not even a question.

    By all means the Q45 should be the engine of choice when using conventional means. I think the 1UZ is one of those engines whose whole is greater than the sum of its parts and I'd still rather have the UZ.
     

    Attached Files:

  6. chrisman

    chrisman New Member

    Joined:
    Nov 12, 2004
    Messages:
    378
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    i make stuff..
    Location:
    chicago,il,USA
    great post flea..nicely written..
     
  7. Lextreme

    Lextreme Just call me "Lex"

    Joined:
    Mar 6, 2003
    Messages:
    12,051
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Professional
    Location:
    City of Halos
    Home Page:
    Well said..... So, 1UZ does have its own natural enemy or rival. Many 1UZ owners complaint about lack of performance parts support, but Q45 is worst.
     
  8. TOBES

    TOBES Paid Member

    Joined:
    Jul 4, 2003
    Messages:
    121
    Likes Received:
    0
    Trophy Points:
    16
    Occupation:
    Agricultural Contractor
    Location:
    ROTORUA, NEW ZEALAND
  9. PaulfromPA

    PaulfromPA New Member

    Joined:
    Mar 17, 2005
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    bum
    Location:
    Lancaster, PA
    Thanks for the feedback everyone. There is a lot of new information posted here and in the other forum.

    Here's an interesting link: http://www.promotive.com.au/ scroll down and click on the infinity section
     
  10. Lextreme

    Lextreme Just call me "Lex"

    Joined:
    Mar 6, 2003
    Messages:
    12,051
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Professional
    Location:
    City of Halos
    Home Page:
    Great info.... Looks like the Q45 engine is very nice. Performance wise have alot potential.

    [​IMG]

    Comparing the two engines, the 1uzfe will be much easier to swap.

    VH45: 710 + 800 +640 = 2150 cm
    1UZFE: 660 + 700 + 710 = 2070 cm
     
  11. Drizt

    Drizt New Member

    Joined:
    Aug 30, 2004
    Messages:
    91
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    student
    Location:
    melbourne
    gees... that nissan engine looks pretty damn sweet..

    anyone know if its easy to hook a manual gear box upto them
     
  12. PaulfromPA

    PaulfromPA New Member

    Joined:
    Mar 17, 2005
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    bum
    Location:
    Lancaster, PA
    There is an individual with a vh45dett powered z32 300zx that is producing adaptor plates for around $500 to mate the Vh45 engine to the z32 tt manual transmission. I'm almost positive that you can use the z32 flywheel also, so that simplifies clutch choices instead of trying to mix and match. Here is the thread at hybridz: http://forums.hybridz.org/showthread.php?t=98356&page=2

    and here is a video of the V8tt z32: http://www.freewebs.com/axepower/video.htm

    Here is a nice little picture I found... I photochopped the disassembled layout into a single picture and made it my desktop mmmmmmmmmm.
     
  13. Zuffen

    Zuffen Super Moderator Staff Member

    Joined:
    Jan 21, 2004
    Messages:
    5,150
    Likes Received:
    3
    Trophy Points:
    38
    Occupation:
    Retired Insurer
    Location:
    Sydney, Australia
    Have a close look at the valve gear in the photo.

    Does that motor run rockers between the cams and valves?
     
  14. PaulfromPA

    PaulfromPA New Member

    Joined:
    Mar 17, 2005
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    bum
    Location:
    Lancaster, PA
    Flea... please forgive me, but could you possibly go more into why you would choose the 1uz over the Vh series? You seem to know the most out of anyone I've listened to and your choice of the 1uz carries a lot of weight. Is there one engine that would be better NA and one better with forced induction? Of course if you need a lighter and smaller engine the 1uz wins, but with enough space for both and the weight making marginal difference in handling, what would make you choose the 1uz?? From what I understand it would be the better aftermarket support and smaller engine size and weight?I suppose what I'm really asking is which has more potential (stronger engine to begin with) with custom made components? Any links to your friend accomplishments... sounds tasty. Thankyou ahead of time for any additional info:).

    Oh also.... I did find pistons.... http://www.escort-us.com/frames.html has them under products, pistons, scroll down to the bottom. Still, the lack of competition causes them to be very expensive. I believe they are what the V8 Z32 owner used.

    From what I've heard, more radical profile camshafts would have to be custom ground as no-one makes them.
     
  15. thad

    thad New Member

    Joined:
    Jun 17, 2005
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    paying the bills
    Location:
    Bellingham, WA
    I'm pretty much in the same boat as you.

    One thing that has not been mentioned, is that the vh45de has a variable valve timing system.

    I also would like to hear more from the Flea about his choice of the 1uz over the Vh45. His site is very informative, and his project badass!
    http://1uzfe.com/

    http://q45.org/

    I have seen q45s alot cheaper than ls400s and sc400s. I have seen 3 q45s with auto tranny problems, 130k-200k mi, for less than $1000.
     
  16. makaveli200369

    makaveli200369 New Member

    Joined:
    Oct 18, 2005
    Messages:
    27
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    IT
    Location:
    Oxnard CA
    How about the VK45 engine..that thing is a gem..do you think its better then the UZ series?
     
  17. rarson

    rarson New Member

    Joined:
    Aug 24, 2005
    Messages:
    217
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    HSB CT
    Location:
    Manchester, CT
    Looks like it, and I would assume those things next to them would be hydraulic lash adjusters.

    I don't see the lower intake manifold in that picture. The LIM has 2 ports for every intake port. It would probably be more difficult to fabricate an intake manifold using the stock lower as others have done with the 1UZ.
     
  18. rarson

    rarson New Member

    Joined:
    Aug 24, 2005
    Messages:
    217
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    HSB CT
    Location:
    Manchester, CT
    This is a site which highlights the features of the VK45DE (basically a newer version of the VH45DE) and compares it to Nissan's IRL engine. Check that one out... 10,700 rpm rev limit!

    In my opinion, the VH45DE is a great engine, with many features superior to those of the 1UZ, but there are several drawbacks. The engine seems more complicated, more expensive, and there is definitely a greater lack of aftermarket support. Add in the fact that it's bigger and heavier, AND that the 1UZ is already a great engine to begin with, and my choice is clear: 1UZ.
     
  19. Peewee

    Peewee Moderator

    Joined:
    Oct 16, 2003
    Messages:
    2,640
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Elec Eng
    Location:
    Perth, Western Australia
    Home Page:
    You see it just above the upper intake manifold, and to the left as well.
    Its 8 seperate pieces.
     
  20. Lextreme

    Lextreme Just call me "Lex"

    Joined:
    Mar 6, 2003
    Messages:
    12,051
    Likes Received:
    0
    Trophy Points:
    0
    Occupation:
    Professional
    Location:
    City of Halos
    Home Page:
    Looks like the Q have intergrated Main Girdle too.
     

Share This Page