Hi All I used my car to experiment with the UK-spec version of the B28 engine, changing the dizzy and metering head and re-plumbing the CPR vacuum feed. Some time ago I fitted a cat bypass to my car and at the time, that gave a noticable improvement. I was still outrun on the motorway by a friend with a stock catted system. However, now with the suro-spec upgrade, I can spin the wheels on a dry road, although my clutch is now suffering! My "seat of the pants" evaluation at the time after fitting the bits involved some expletives! I still run a stock air filter and box. I just make sure to change the filter every 6000 miles. Martin #1458 mike.griese@xxxxxxxxxxxxxxxx wrote: >I am always skeptical of these claims because they are never done >with any kind of rigor. I'm willing to bet that most every DeLorean >can benefit from a tuneup - with OEM parts or aftermarket. Seat >of the pants evaluations are useless. I would be willing to believe >claims if there are documented dyno runs before and after every >change, measured against new parts to the original design spec as a >baseline. Anything else is marketing. > >Ever notice how those stupid tornado intake infomercials ALWAYS >do a tuneup and filter change on the car with the installation of the part? > >-- >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/ <*> 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/