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Gixer1460

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Posts posted by Gixer1460

  1. 23 minutes ago, 370steve said:

    wanting a billet block, so might get thicker liners if it dont mean any/too much crank case work!!

     

    Then there is the possibility of breaking into the oil gallery in the cases - bores bigger than 81mm with corresponding bigger liners tend to use external oil lines and go dry block.

    • Like 1
  2. 2 hours ago, Arttu said:

    Downside is that you can't do any engine braking on the auto gears since it would force the gear out while the shift fork is trying to hold it in.

    You actually can't back off until you are in top gear - if you do, you risk wrecking shift forks and shift shafts. This is a cases split operation to replace but auto users adapt and machine the cases to allow access and replacement via the sump and clutch cavity - multi handed job but better than engine out / split / rebuild and re-install with an hour between rounds!

    • Like 1
  3. There is no 'sensor' inside the switch unit - its just part of the clamp to give mechanical strength. Any Orange colour wire is a 'key on' live - under the tank the obvious one is Orange / white which would feed the coils. Can't imagine what would be in the headlight cowling - alarm horn maybe?....... if an alarm is fitted then you could be in a world of pain as they interfere with all sorts of circuits! 

  4. 'M' & 'N' models had the nasty 40mm CV's - 'K' & 'L' were 36mm and were very tunable!

    I think the GSX's were fitted with 34mm CV's  and so unless the engine internals have been altered to increase airflow into the head, the fitting of bigger carbs will likely result in lower gas speed / higher depression and less draw on the jets. I'd try the same jets as the 34mm carbs first off or 10% bigger for a start?

  5. 11 hours ago, vizman said:

    They look like Wiseco, no good for turbo. 

    Depends how you build it! I used 1186 12:1 Wisecos in my first turbo - barrel spacer knocked the CR down. There is also a fair amount of crown thickness that could come off with would reduce the spacer thickness and achieve a better squish!

  6. 5 hours ago, Zweihammer said:

    Both heads look like dot heads, correct? Any benefits to using one on a turbo application? Don’t they up the CR, typically?

    They do and on big bored engines the CR could be through the roof but both of those look like they have barrel spacers? Optimal CR for big engine & big nitrous use is about 11:1 if you can control the timing with a degree of accuracy ;)

    • Like 1
  7. 2 hours ago, Captain Chaos said:

    and how did it perform?

    Just like a stocker i'd guess - looking at the gearing! It's got twice the engines, stock horsepower but twice the torque! Having 90 deg bends on the exhaust outlets - class! It's about the jenkyest redneck combination I could imagine!

  8. Can't imagine anyone would make a specific relay for just lights - they usually are multipurpose. So if it fits, use it. Failing that just cut the plug off, re terminate the wires and use a std 4 pin / 5 pin 30A relay which are just a couple of quid.

  9. 6 hours ago, dac said:

    Way back it used to be a performance improvement by yoshimura to inline bore the cam journals and fit soft metal shell bearings like you have in a big end or main bearing .

    I believe the shells were from a Kwak ?  Its hard enough to find someone to line bore cam caps, even harder to find someone to overbore them, modify the caps and bearings and fit them - not saying impossible just V. spendy!

  10. Not surprised - you've used one piston, in an un-restrained block and heated it 'uniformly'. Done this way the cylinders can move around and all of the piston is heated whereas when operating, its primary heat source is only through the crown so the skirt should be somewhat less and maintain its clearances. I'm guessing it's why IC engines are only 30 - 40% efficient - too much mechanical drag!

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