Patcon Posted August 10, 2015 Share #241 Posted August 10, 2015 The carb sync tool you are using will handle higher rpm if you turn the rubber adapter to line up with the holes in the unit. That allows you to tune the 3000 plus rpm values Link to comment Share on other sites More sharing options...
oranngetang Posted August 10, 2015 Share #242 Posted August 10, 2015 Guess and check sucks, I'd recommend getting a set of these if thats how you tune your carbs now. You cant run these at high RPM but they more than handle idle speed and yes you can tune while the motor is running.im not sure how much better the 123 dizzy could be than this ZX unit. I saw the propaganda video and its clearly better but the electronic unit just before the 123 unit looked pretty darn good too. Its probably better at doing things like cold starts and ultra fine tuning, for the money though i can have this ZX dizzy and 700 (american) bucks to put into another system..I think even with our engines having a modified comp ratio, aggressive cam and modified induction an adjustable curve would be about the only way to get it running really well on the street. It feels like my 240z is really holding it back in the mid range, and I'd like more advance at idle I think.I'm surprised nobody has posted their curves before and after yet. That would tell a lot.Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
Kurbycar32 Posted October 20, 2015 Author Share #243 Posted October 20, 2015 Complete Z store exhaust with 3-2-1 header and turbo muffler installed to replace my litterally exploded muffler. The motor is all buttoned up and runs pretty well. My 1974 fuel pump cant keep up so im finally ordering that carter unit Link to comment Share on other sites More sharing options...
siteunseen Posted October 21, 2015 Share #244 Posted October 21, 2015 Sounds good! It's really pumping out some air. What did you end up with for the compression ratio? Link to comment Share on other sites More sharing options...
Kurbycar32 Posted October 21, 2015 Author Share #245 Posted October 21, 2015 Dave says its about 10.5:1 Link to comment Share on other sites More sharing options...
Kurbycar32 Posted October 30, 2015 Author Share #246 Posted October 30, 2015 Update on the Carter P60504 fuel pump we were all talking about: The early 260z comes stock with an electric fuel pump at the back of the car but unfortunately its powered through a set of relays that determine if the motor is running at 400+ RPM AND the starter is disengaged before sending power to the pump. Since I am now using this pump as the sole fuel pump I bypassed the two relays to send power to the rear pump when the ignition is on. That carter pump is damn near silent and provides enough fuel to run the Rebello motor with modified SU carbs. I am very happy with it. The motor is unleashed and it pulls hard forever, this car is as fast as i dare take it on city streets. Link to comment Share on other sites More sharing options...
oranngetang Posted October 30, 2015 Share #247 Posted October 30, 2015 I'm running a mechanical on mine still. You noticed a difference from stock? I'm curious if you ever discussed triples with Dave, or if he mentioned there would be gains over the 48mm SU's going to an OER, Mikuni/Solex or Webers. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
Kurbycar32 Posted October 30, 2015 Author Share #248 Posted October 30, 2015 I noticed a huge difference from my old broken electric fuel pump . This one is also silent and I'm not running a mechanical pump. Dave did say triples would be more power but that the modified SU's would do pretty well and are easier to tune Link to comment Share on other sites More sharing options...
Wilbur
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