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Marinising a 304

Discussion in 'V8 Development and Modification' started by VK SL 3800, Feb 24, 2018.

  1. VK SL 3800

    VK SL 3800 Well-Known Member

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    Mounted the thermostat housing above the dog clutch, its a pretty busy looking thing. Ran it for a while and it seems to be working.


    IMG_20180806_171229.jpg
     
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  2. EYY

    EYY Well-Known Member

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    Looks good. Be careful with big bends immediately before/after the maf as it creates a high velocity (short turn) and low velocity area along the outter wall. Messes with the way the MAF reads as I've found. if you can put a bit of straight pipe between that bend and the MAF you're probably best off.

    But if it runs well, no need to worry about it! On that note, do you still have the airbox? If so I may be interested in purchasing it from you if you want to sell it.
     
  3. VK SL 3800

    VK SL 3800 Well-Known Member

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    Ill see if there is room to extend the intake when i get the cover on, still up in the air whether to put a filter on or not as well. Lots of boats i looked at didnt have one and the MAF has a screen thatll catch anything big enough to do damage.

    As for air filter lid ill have to go have a look at the ute, not sure if its there or been lost, you can have it if its there.
    They were unique to the VSIII roller cam utes from memory.
     
  4. VK SL 3800

    VK SL 3800 Well-Known Member

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    765.jpg p9.jpg
    Got the go go pedal mounted and hooked up, just another little thing off the list.

    Having problems with never drying resin, mixed the same ratio as all the other times and it refuses to set. All i can put it down to is the cold weather. It gets a skin if you put the heat gun on it so maybe it will go off on a warm day.
     
    Last edited: Aug 27, 2018
  5. VK SL 3800

    VK SL 3800 Well-Known Member

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    765r4.jpg Brother got a new lens for his camera, weather was nice so we took the boat down to the lake with the old Ute.
     
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  6. EYY

    EYY Well-Known Member

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    So whats the verdict? Did it hit the water? :p
     
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  7. VK SL 3800

    VK SL 3800 Well-Known Member

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    She'd sink pretty quick, twin 2.5'' holes would let a lot of water in id reckon haha.

    Other then the exhaust and a prop it would be able to go out for some tests but i want to get it finished a bit more before i take her out, excitingly close though!
     
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  8. VK SL 3800

    VK SL 3800 Well-Known Member

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    Finished making the exhaust this arvo:
    zorst.jpg

    Stainless was a little different to weld, i used a stick and took me a few holes to get it set right.
     
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  9. VK SL 3800

    VK SL 3800 Well-Known Member

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    Big update!

    Shiny new prop showed up today, so after work we took her out for the maiden voyage.

    Happy to report no major problems. Runs at 80c, no vibrations and heaps of power. Had a good look for leaks before heading out, didnt want to end up sunk in the middle haha.
    Have a mild coughing problem thats possibly related to the worn ignition switch or possibly my test fuel pump being a bit small or maybe just the old plug leads no big deal and should pretty easy to sort out. Very happy.
    41594428_2174005745975123_1016549592809865216_n.jpg
    41627540_842496922772056_4158377960073592832_n.jpg
    41692618_1873920602692095_4628077825537081344_n.jpg
     
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  10. VS 5.0

    VS 5.0 Well-Known Member

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    Needs more video !!!!
     
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  11. VK SL 3800

    VK SL 3800 Well-Known Member

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    Yeah i asked the old man to take a video and he thought he was videoing but managed not to hit record in a classic dad move haha.
     
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  12. VK SL 3800

    VK SL 3800 Well-Known Member

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    Took a short video of the second test run, couldnt get a good recording of the sound with the wind noise but its running nice.

     
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  13. delcowizzid

    delcowizzid on holiday

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    If some leads and plugs don't cure you cough move the ignition module away from the ecu and see what happens
     
  14. VK SL 3800

    VK SL 3800 Well-Known Member

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    Does the ignition module create some kind of static that upsets the PCM or something?

    It never coughed or anything on the second run and i haven't touched a thing except put the cover on. Ill be doing leads and plugs before next run. It needs a new fuel pump its just got my old test one from a VK EFI which i think is pretty borderline. Is an 070 bosch big enough?
     
  15. EYY

    EYY Well-Known Member

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    Noise suppression capacitor on for the coil is critical for the 531 pcm's apparently as they're very sensitive to interference - more so than the earlier pcm's.
     
  16. VK SL 3800

    VK SL 3800 Well-Known Member

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    [​IMG]
    Ive got the suppressor connected, its mounted onto one of the rocker cover bolts just next to the coil. Not sure where its factory mounted as this is where it was when i bought the engine. The ute had a crappy ebay special coil that you can see in this pic but i have put on the correct bosch one since.
     
  17. VK SL 3800

    VK SL 3800 Well-Known Member

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    Got some teething problems i need to sort.
    The main one is not starting hot, not sure whats happened as the ute started hot fine but the boats having a few problems.
    Heres a video of what its doing, pumping seems to help it start but not always. It gets worse at normal operating temp but this is warm maybe sitting 30 mins. When it goes it makes a large hiss from the IAC being fully opened. Starts cold perfectly everytime interestingly.




    Yet to plug in a scan tool or check for codes but anyone seen something like this before?
    Other problems are pretty minor, alternator isnt exciting or charging properly, got an exhaust leak on one of my manifolds and the fuel pump isnt quite big enough.
    46765900_725160994525132_1125207888826990592_n.jpg
     
  18. VK SL 3800

    VK SL 3800 Well-Known Member

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    Found something very odd after much hair pulling, when i first put the engine in and ran it was fine, then seemingly random it started cylcing the fuel prime over and over with a split pause when you turn the ignition on.

    Cut a long story short, but in this pic there is an earth from the ign module body mount to the main PCM and relay block earth cable. When you disconnect it there is no fuel prime problem, if you connect it to the block earth there is no problem, connect if back like the picture it plays up again.
    Very weird. Must be causing some kind of interference.
    [​IMG]
     
  19. delcowizzid

    delcowizzid on holiday

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    Earths should all be earthed at the block which is total 0v and ran as per factory with all the noisey earths injectors etc separate from the quiet sensor earths
     
  20. VK SL 3800

    VK SL 3800 Well-Known Member

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    The earths up in the seat are all just relay earths from memory which makes it a little strange to effect the PCM?
    The engine harness is earthed in the original locations on the block. There is only 1 big fat earth to the block from bat at the present is that enough?

    Should i move the ignition module further from the PCM?
     

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