--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote: > Series 066 full throttle enrichment is only active below 125 degrees F (via a thermal vacuum cutoff) and even then is only active for ~10 seconds (via an equalizing delay valve). DeLorean lowers thermal cutoff to 104 degrees F.< While several other models of CPR do have it the 066 has no full throttle enrichment feature. WOT enrichment on the Delorean is performed by a throttle mounted switch and done electronically by the Lambda controller. What you're refering to is the 066 acceleration enrichment, which is something else all together. If it was true full throttle enrichment it wouldn't be a 10 secound function. It's only used for cold acceleration under partial throttle and (as you pointed out) is not active once coolant temperature warms up. While we're on the subject owners should know accel enrichment via CPR was replaced on 1982 and later B28 applications (outside the Delorean) by using a differential pressure switch to electronically provide acell enrichment through the Lambda system. This results in improved response during cold acceleration and relegates the 066 CPR to warm up enrichment only. This modification can easily be retrofitted to Deloreans by employing the Volvo switch and an unused input on the Lambda controller. To the fellow who wants to remove his Lambda: I'm guessing you don't really understand it's function or you wouldn't be in such a hurry to yank it off. However, if you remove it you must also remove the catalytic converter because you'll render it useless in short order (or overheat it). And you should leave the Lambda loop active even if you remove the converter. Disabling Lambda removes closed loop mixture control. It's better to leave it for several reasons assocciated with that problem, not the least of which is emissions. If you want to remove it to gain power (because of it holding your mixture at stoichiometric) there are ways to "program" the Lambda controller to deliver any A/F mixture you'd like within reason. For example you could have best emissions or best power at the flip of a switch. In either case it'd still be operating in closed loop and that beats leaving mixture control solely in the hands of the basic K Jet. The fact is closed loop control beats open loop any day of the week for drivability, emissions, and fuel economy and removing it will usually get you less performance, not more. I suggest you have access to a decent exhaust gas anyalzer if you do decide to pull it off, you're going to need one to get things right. And without closed loop the mixture (and hence performance) will wander based on numerous variables. You can also pretty much forget about passing any emissions test worthy of the name. Greg To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/