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PLYNX

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Posts posted by PLYNX

  1. On 10/9/2022 at 11:31 AM, r32-25t said:

    Cast blocks have the issue of the cradle walking and require a fair amount of work to try and rectify.

    1/2in head studs are usually desired to keep the head down but the deck ends up weak and cracks.

    the bores flex and end up either being oval or crack, also with core shift in the casting process you can end up with thin  spot which either makes them only good for one over bore or not good for even one

    Saw this thread on blocks and it takes me way back to dinosaur days with my old Holden red motor sixes and its seems that the same issues with the in line sixes keeps on repeating in regards to main cap and cradle walking.

    Got to agree with r32-t on the work that needs to be done on them to get them to survive high horse power applications.

    I had to sonic test the blocks I had for wall thickness and core shifting, sleeve them down with thin wall ductile or nodular iron sleeves (can't remember which), grout fill the block.

    Also had to machine a cradle or crank brace ( whatever you want to call it ) got a two inch thick block of steal, the length of the motor and width of the sump rails and machine it out to replace the main caps and drill out the sump rail mounting bolts and bolt it all up. Dry sumped it etc etc blah blah blah

    This tended to be the best way to get the most strength out of them. 

  2. On 7/26/2022 at 9:26 PM, khezz said:

    The main lesson in that video is that RB30 is king. $500 a through. Stronger, harder, stiffer and there is no replacement for displacement. 

    Yes there is ! Its called money.

    I used to think that the "there is no replacement for displacement" was a groovy statement in the day but then I got exposed to the F1 Honda engines of the mid to late 80s.

    Changed the way I thought a lot !

    • Like 1
  3. Lost a Nismo center cap off my wheels god knows where.

    Made up these as a replacement !

    Bloody Covid lock downs and staying away from everyone made me do it !

    Original in chrome was silicon molded then cast in polyester resin.

    Then the Nissan center section machined out.

    A silicon mold was taken off a small Nismo aluminium badge and that was also cast in polyester resin.

    The two were stuck together and Bobs your Uncle . . . . . but not if he has the operation cause then he would be your Aunt ! ! !  

     

     

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    • Like 1
  4. Had this happen to me on various electric motors over the years

    I've have success with putting the armature into an electric drill and polishing it with 1200 grade sandpaper.

    This will take the build up of carbon and dirt built up over the years on the copper.

    Reassemble then see how it goes.

    If this fails then you will have to look at the brushes as they can, as well, build up gunk and oxidize and fail to take the current to the armature.

    If its the brushes then all I did was go to and electrical repair shop, for power tools, with a set of vernier calipers and went through brushes until I found the right size and soldered them into place.

    If this fails then you've got to look at the armature or the winding itself and an electrical repair shop is going to have a poke and a prod at it.

    My money says its the brushes

    • Like 1
  5. On 11/5/2021 at 10:35 AM, Dose Pipe Sutututu said:

    standard Skyline ownership, mine spends more time on tow trucks, hoists and jackstands than at the track or streets. I pay registration and drive it like 4 weeks a year and the rest is spent as a garage ornament or parked at paid private parking on a hoist at a workshop LOL

    Oh Johnny,

    Things are opening up now after covid and you know the cure to your woes . . . . . . . 

    DRIVE BABY DRIVE . . . . . . .

    And you know where.

    Fix it fix it now . . . . . .

    • Like 1
  6.  Seems you have sort of answered your own problem

    Hmmmm .  . . In my opinion get rid if that cone filter and use and original one or multiples of one

    All it doing is sucking hot air into the engine for the hot engine bay

    What does the original air box look like ?

    It can be a starting point to re-engineering it.

    Basically you need to convert that entire guard corner to an insulated area for a filter to sit that is pulling cold air from the outside of the car.

    Here's an example of what can done on my R33 a while ago using the original cold air intake

    post-6582-1242045251.jpg

    post-6582-1242045299.jpg

    post-6582-1242045325.jpg

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