Guest |195| Posted July 31, 2009 Report Share Posted July 31, 2009 Hi, I have my k24 powered honda running on a vi-pec v88. I've been having trouble tuning the cold start parametres. Would anyone be able to suggest some suitable settings/starting points for this engine? Crank enrichment % Crank enrichment hold times Post crank enrichment % Post crank hold times Thanks! Quote Link to comment Share on other sites More sharing options...
rayhall Posted July 31, 2009 Report Share Posted July 31, 2009 These settings should get you close to what is required. Quote Link to comment Share on other sites More sharing options...
Guest |195| Posted July 31, 2009 Report Share Posted July 31, 2009 Fantastic. I'll give the settings a go today Quote Link to comment Share on other sites More sharing options...
Guest Marcel B Posted August 1, 2009 Report Share Posted August 1, 2009 I may be wrong , but doesn't the injector size have a lot to do with these settings ? Quote Link to comment Share on other sites More sharing options...
rayhall Posted August 1, 2009 Report Share Posted August 1, 2009 Marcel, No, as they are percentages added to the base fuel table and master settings. If the master and fuel table are tuned, then these values would work on most engines. Quote Link to comment Share on other sites More sharing options...
Guest |195| Posted August 4, 2009 Report Share Posted August 4, 2009 Between 50*C and 80*C the engine starts pretty well. Between 10*C to 20*C it's still having some trouble. After a few seconds of cranking the engine will try to kick over but then immediately stops. It will sometimes start on the second cranking attempt. On the third attempt it starts with little fuss. This lead me to believe a higher cranking enrichment might be needed, however I did notice some carbon deposits on the exhaust tip. Perhaps the post-start enrichment is not delivering enough fuel once the engine kicks over into the higher rpm. That might explain why the engine stops as soon as it tries to kick over. Any reccomendations? Quote Link to comment Share on other sites More sharing options...
rayhall Posted August 4, 2009 Report Share Posted August 4, 2009 Are all the cells in the fuel table tuned. If they are accurately tuned then the values I gave you would work, unless the engine had big overlap cams. Send me the map so I can look at the fuel table and other settings. Email to [email protected] Ray. Quote Link to comment Share on other sites More sharing options...
Guest |195| Posted August 4, 2009 Report Share Posted August 4, 2009 Email sent. Quote Link to comment Share on other sites More sharing options...
rayhall Posted August 4, 2009 Report Share Posted August 4, 2009 I have looked at the map, and I think the starting relates to the DBW idle settings. There is a startup step table that can be used to give more throttle when the engine starts. I believe your idle control table values are a little too big at cooler temperature. The map you send me had the throttle open at 3.5% and a idle speed of 1600 rpm at 50 deg C. At this temperature you should not need such a high idle. I would try making this table smaller and using the startup step table at colder temperatures. Ray. Quote Link to comment Share on other sites More sharing options...
Guest |195| Posted August 4, 2009 Report Share Posted August 4, 2009 Ok, thanks for the suggestion. I'll make some adjustments to those settings and see how I go. Quote Link to comment Share on other sites More sharing options...
Guest |195| Posted August 5, 2009 Report Share Posted August 5, 2009 still having some trouble at lower temperatures with these settings. I'll make some small adjustments to the values to see if that helps. would you suggest activating the pre-crank prime? Quote Link to comment Share on other sites More sharing options...
MMC_Tuner Posted February 23, 2022 Report Share Posted February 23, 2022 The photos from Ray have disappeared. Is there a copy of what he has shared ? looking to tweak my cold start settings also. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 24, 2022 Report Share Posted February 24, 2022 I doubt it, it was more than 10 years ago. It would have most likely just been our base map settings however. Quote Link to comment Share on other sites More sharing options...
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