I can tell you that a stock original coil runs the spark quite happily on #2727's Renault turbo engine at 1.2 bar of boost. A so-called "performance" coil started misfiring at about 4psi... Martin mike.griese@xxxxxxxxxxxxxxxx wrote: > My problem with all of these "performance improvements" is that > there is never any data to back them up. If these things really are > an improvement - prove it. Put a standard, freshly tuned up car on > a dyno for a baseline run. Then make One Change and put the car > back on the dyno and measure the difference. Then put the old parts > back on and put the car back on the dyno. The first and third runs > should match, the middle run shows the improvement. > > Dave is right - you can't evaluate any new part as a performance > improvement unless the part being replaced is running at it's optimum > specification. It's like replacing a 25 year old, flat bald tire > with a brand new properly inflated tire and claiming that it's > an absolute performance improvement over the original spec tire. > You aren't comparing to an original spec tire - you are comparing > to a 25 year old, flat bald tire. > > Until there are measurements, it's all snake oil. > > -- > Mike > 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/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> 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/