Jump to content


  • Posts

  • Joined

  • Last visited

Everything posted by wombat258

  1. I have crack tested a LOT of pistons for a LOT of race teams over the years. I have only come across one speedway sprintcar engine (methanol V8) with ceramic coated pistons. Most of the pistons revealed flaking of the coating! I have 2 pistons from 2002 championship winning Ferrari F1 engines - no coating. IMO if you are melting pistons you have a tuning problem, or are using nitro!
  2. Busa pistons have dished crowns.
  3. A rare missed shift loses a drag race, and you are back on the trailer. Better to go safe, and not miss shifts! It also depends on when your cut time is initiated. For a straight cut on shift signal, 70ms is about right. On closed loop systems with pre-cut delay you can get away with 15ms. On top of that some ratios will always require more cut time because of internal dog configuration. On early Zuke and Zeds this was always the 4-5 shift.
  4. Running it in a circuit race car. Compression is 11.1:1, running 98 octane pump fuel. Had to put extra cooling on because of the extra power (220 bhp), but no problems with cooling, even on hot summer days here in Oz. It is more reliable than my 79.5mm bore stroker!
  5. Very rare. I have one of the 1298cc SBM blocks drilled for full watercooling . . . 83mm pistons! Allows for a lot of valve area.
  6. I would have ditched the stock system and installed a Dyna 2000 ignition and coils. Problem solved!
  7. There is on my Australia plate 1100WS. Maybe it is a country specific requirement?
  8. Should be a noise compliance plate affixed to the chassis or exhaust.
  9. Start by counting gear teeth to calculate the gear ratios. Use google to find out what those ratios match to. There is a big difference between 750W and SRAD.
  10. My bad. I actually made a 6 spring conversion for my 1100W engines a while ago before I went to a lockup. The 1052 is a 4 spring, I bought new parts from Suzuki, as follows: 1 Clutch inner hub 21410-06B02 1 off GSXR1100 G,H & J 2 Pressure disc 21462-06B00 1 off GSXR1100 G,H & J 3 Coil springs 4 off - Barnett HD 4 Spring spacers 09180-06174 4 off GSXR1100 G,H & J 5 Washers 09160-06020 4 off GSXR1100 G,H & J 6 Bolts 01107-06307 4 off GSXR1100 G,H & J
  11. Yes. It is also a common modification to use 6 spring plate on an 1100W, except you need to make a 10mm spacer for under the hub nut to allow for the longer 1100W shaft. You may need a longer pushrod, or add an 11mm bearing as a spacer.
  12. Use a 1052 clutch hub, pressure plate and springs with the 750W input shaft and the 1100W basket, plates etc. You will have to remove the plug from the end of the hollow 750 shaft, and replace it with a support spider from a 1100W donor shaft. Easy hydraulic conversion. Will it last? Maybe if you do not flog it. Necessary? The 1100 engine has lots of torque, so no real necessity for a close range gearbox. And, no need for the Factory Pro star, just transfer ALL the 750 gearbox bits including drum, forks, selector shaft etc.
  13. You can use the 1100W pan without oil cooler. Remove the internal restrictor that you can see through one of the oil cooler outlets, and plug the oil cooler ports. The oil cooler normally works on a partial oil flow.
  14. Just buy them from the Suzuki dealer? Used ones are hard and/or cracked.
  15. I have one in use, but I am not selling. Be aware that they were supplied with water jackets or without jackets. They are indeed very rare to find.
  16. Nothing wrong with std alternator unless you are drawing extra load for EFI. You can use the earlier series (1993) alternator and drive assembly to remove the rubber bush, or alternatively you can machine an aluminium bush to replace the rubber.
  17. There are XG and XC series rings. They have different ring thickness. You may have ordered the wrong series. Measure the width of your old rings. XG are 1mm top, 1mm 2nd, 2mm oil. XC are 1mm/1.2mm/2.8mm. Rarer are XA at 0.8mm/0.8mm/1.5mm
  18. Wiseco recommendations. Multiply bore in inches by the factor to give ring gap. 3" bore equals .015" top, .0165" second for street turbo. Go too tight and the rings can butt with heat and score bores or crack upper ring land. Loose is the way to go to avoid engine damage.
  19. Piston to bore clearance is governed by alloy, bore size and application. Check JE's recommendations, but if OP's engine was quiet at running temps the clearance will be fine. I regularly see these scuff marks andthey do not hurt performance or reliability. I would only be concerned if there was scoring or damage to the ring pack. Of course, if a slealership tore it down you would be up for new pistons and a rebore. Revisiting the original post . . . top land crushing down on the ring is indicative of either excessive heat and temperature, or pistons contacting the head. Hopefully just a bit of excess carbon in the ring groove.
  20. Looks pretty normal skirt scuffing to me. Oil film might be breaking down at operating temperatures. Oil brand/grade/service intervals should be assessed. 0.14mm (.0055") piston to bore is OK. Hone it and you will be fine. Check crank is running true and indexed. Could be the vibration problem if it was not welded.
  21. Port with restrictor is oil inlet. Directly opposite that is the oil drain with 2 tapped holes either side. The other 4 ports are the water ports - blank off 2 and run the water inlet/outlet either side of the centre section.
  22. Corrosion because of condensation sitting in bores over a long period. Give it a hone and see if it cleans up.
  23. Should be internally restricted. Look at the oil inlet to confirm. I added my own restrictor to be sure.
  • Create New...