Maxt

Its just because with all the barking and brapping, a slight roughness from mixture is hard to separate from the rest of the mechanical mayhem going on. ..

And the PP makes way more torque everywhere in the range compared to a stock port. I have a nearby hill I always had to shift into 4th with when I had the stock 6 port, with the PPort, it pulls it in 5th. On launch the 6 port couldn't break a tire loose, last track day I was putting down down a pile of rubber on the 1-2 shift at 50 mph.

j9fd3s

yep! but i think i was further off than a stock port would have let me get away with

heretic

Funny you should say that. I make my modest living by trying to take big cammed piston engines drivable on the street because the person writing the checks just had to have the one on the bottom of the page and now they realize that a 250 at .050 is not going to drive well around town without a lot of work. I rarely see EFI cars because they just tend to work. Drivability wise it seems that EFI will "erase" about 30 degrees of cam timing. I personally drove a C4 Corvette with primitive Accel DFI and a 266 degree (at .050!) solid roller, and while pleasantly angry sounding at idle, that idle was at a shocking 950rpm, and it was perfectly drivable in the lower RPM ranges. At that point, I was solidly hooked on fuel injection.



I have seen idle vacuum rise from 4 inches of mercury to almost 8 inches by switching to EFI, on a peripheral port. Yes the idle is still rough and rowdy but it will handle part throttle a ton better than with a carb, and it doesn't smell like a terrorist attack when you come up to a stoplight and have to idle for half a minute.