[930cabman]

Originally Posted by ahh911

In general I just struggle with the idea that modern carbs yield better performance than modern EFI. Please correct me if I'm wrong, but even nascar has been running EFI for decades, and I'd imagine every other motorsport. If this is just an assumption, my apologies. So what makes it different on our cars? Is it variable valve timing or variable dynamic intake runners that is lacking? Could be that.

Phil

Edit: I took the initiative to look up nascar fuel injection, just to see if my statements were off the mark or not. Wiki had the following statement which I think is powerful in favour of injection, mechanical at least, I was worried that homoligation was why injection wasn't used, but that's not the case. Anyhow, if true, injection was banned because it cleaned house, according to wiki. In 2011 injection was finally allowed in the premier series. so.

wiki: ( I can only assume it's true?)
History
During the 1957 NASCAR Grand National season, president of NASCAR, Bill France, Sr., immediately banned fuel injection from NASCAR. This ruling was in result to the dominance of the 1957 Chevrolet. General Motors did not offer many 1957 Chevrolet stock productions with mechanical fuel injection. However, enough were produced to allow it into NASCAR competition due to homologation rules. This ban on fuel injection would continue into the 21st century.

The stock Bosch FI on my 1975 911S I am sure performed well for many years, but being a carb guy I found a set of Weber 40 IDTP carbs. Fooling with the various items included with the Bosch system and the lack of a local specialist is forcing my decision, I am changing. Engine is fresh and looking at also changing exhaust. Having heat is a nice luxury, but does have a cost. Billy Boat? TIA