Tim, You may want to try changing the damper piston oil. The problem you describe could mean no oil in dashpots or too lightweight of an oil. Conversely it could also mean to thick of an oil and the pistons can not rise fast enough when the butterflies open. Also check for synchronisation again.
Does it have any problems revving from Idle? Aaron Johnson #38 F-Prod Spitfire MkIV Oregon Region SCCA http://www.geocities.com/spitracer9 lot of parts from the parts car still left! ----- Original Message ----- From: Tim Benner To: Spitfire List (E-mail) Sent: Saturday, July 26, 2003 7:32 PM Subject: 1147cc tune-up carb problems Hello Listers, I have just finished a bit of a tune up on my MK2 1147 engine. After setting the valves at .012, new plugs, points, condensor, rotor, and dist. cap and timing, it does seem to run more crisply. It idles nicely and runs okay. At 1147cc I don't expect it to snap your head back when accelerating in 3rd or 4th gear, but acceleration is a bit of a let down. When you try to accelerate hard it seems to flat out and gurgle for a while before the engine catches up to the throttle. It has a clear fuel filter mounted on the firewall that looks to be flowing well. I have read a lot of disussions about SU carbs and needle sizes, but have not had the nerve to start fiddling with mine yet. (other than topping up the dashpot oil) My question is, is there a simple way to make the mixture richer so I can see if the flatting out is fuel starvation? Has anyone else had this sort of problem? Should I be looking at something other than the carbs? I have a spare set of HS2s that I will rebuild. Any sage advice from SU experts out there? Any and all advice will be appreciated! Tim Benner 1965 MK2 /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
