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Gruppe IB
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  1. 3.0 & 3.2 both use a 95mm piston. Any idea on the rods used to make the 3.2 pistons work?
  2. Later 9.8:1 pistons and 964 cams work well with CIS but if ITB's are definitely on the horizon I would be tempted to hold back and go for something like a 10.5:1 piston with 'S' profile cams. You would retain all the driveability of a stock SC but gain an extra 60 bhp for very little extra effort. It would also allow you to match port to manifold sizes during any machining ops with the heads off. Also consider your CIS, these are are all getting on for 40+ years old and can work fine if undisturbed. Removal and refitting is not always guaranteed to go to plan.
  3. Wossner pistons in my 3.0. Very nice piston but don’t know how well it would work with stock cams and CIS.
  4. Have a quick look on a SMART Car forum. They don’t have drain plugs and experience reliability problems resulting from poor oil changes.
  5. 20 mph is a big shunt. There will be some damage somewhere. Get it checked by a specialist.
  6. Have you tried Porsche? Part# 999 181 189 50 or https://www.advancedfluidsolutions.co.uk/14mm-id-916-x-500mm-cotton-over-braided-nitrile-fuel-hose-pipe-tubing-1827-p.asp
  7. https://www.halfords.com/tools/hand-tools/automotive-tools/laser-coil-spring-compressor-696385.html Not pushing Halfords or Laser tools but this type of compressor works very well.
  8. When the suspension is at full droop - ie car is jacked up or son jumping car over canal bridges, the main coil spring can slip off the upper or lower perch. To keep the spring in position small helper springs are used. https://funtodrive.net/coilovers-vs-regular-shocks-and-springs-what-is-the-difference/ If you find someone with a bit of carburettor knowledge then a tune up could help but most garages want to plug something into a computer. At best they mask the real fault by making incorrect adjustments. If you get the rebuild kit, take loads of photos use good quality
  9. Have the coil overs got the helper springs fitted to keep the main springs seated at full extension? Ref the carb would probably be worthwhile a clean and refurb kit - only a few £. If it’s a Pierburg they have a pull down actuator these are sub £15 and with changing as part of a service. Air leaks and and build up of crud are the usual offenders.
  10. You could drive it and put it through several heat cycles. ** Caution- there is the obvious risk of using a car with brakes that are not 100%. **
  11. Give it a try. I have a sunroof rear cage in a non-sunroof (also no headliner) car. I fitted a length of fire resistant foam across the top tube and it’s a very snug fit against the underside of the roof skin.
  12. New seals? If the seals are sticking on the pistons they can pull the pistons back giving the pedal feeling you have. You can get special assembly lube to build up the seals and pistons but many just use regular brake fluid.
  13. Have you test fitted it in the car? The rear section may slide forwards a little to give extra clearance.
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