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A set of vortec heads, 750 mechanical secondary carb and a edelbrock rpm air gap intake will double the hp of the stock tbi
Want to head to the dyno and see it for yourself? I have enough parts to put together a stock tbi engine and i have vortec parts too. The tbi struggles to make 185hp because of head and injection design. The carbed vortec will make close to 390 with flat tappit cam and my old std bore 350 made 428hp with vortec heads, hp car. and a lt1 camLOL No it won't, it will be an improvement but not quite 2x.
I could start my holley hp in cold weather and it doesn't have a choke provision at all. The hp is so tuneable with air bleeds all i did was put a fast idle noid on it to up from 900 to 1200 rpm idle. Was on a toggle switch. That engine made 644hp on dyno and even with 456 gears, 5100 converter in a two speed powerglide it would get 8-10mpg doing 4200 rpm at 65mpg on highwayBeat me by a minute!
Carbs can be tuned to run leaner than stoich at part-throttle/cruise. They have the potential to get BETTER fuel economy than feedback fuel injection that's tuned to run at "14.7:1" if the carb and engine are tuned to run at 15:1 or leaner. But guys are still trying to correct full-throttle fuel ratio on Holley carbs with the MAIN JETS, so it's not likely that you'll find one set up for lean cruise. Carb tuning in general is still apparently a skill that most folks don't have, even for plenty of folks who think they do.
The biggest problems with hard starting are
1. Folks who can't properly adjust the four things on a choke system that need to be correct;
2. Gasoline that may no longer be blended for proper vaporization in cold weather, and
3. Empty float bowls after the carb sits for a period of time--overnight, or a few days. The engine won't start until the float bowls have gasoline; and that takes considerable cranking unless you've got an electric fuel pump that can "prime" the empty carb.
Get the four choke adjustments (choke coil, choke pulloff, unloader, and choke-blade-to-fast idle cam) set properly, get the carb float bowls filled with fresh, winter-blended gasoline BEFORE you start cranking, and a carbed engine will start at -20F. MAYBE it'll even start at -40. In the early days of fuel injection, a properly-set-up carbed engine was MORE likely to start than a fuel injected one when the temperature went to the wrong side of "zero".
The properly-tuned carbed engine will probably need a faster idle, and is less-likely to meet emissions targets especially during warm-up, when the choke is on. That's where FI shines.
Complete agreement.
I don't doubt this. I've heard similar testimony from other Holley users who don't have chokes, and the engine is claimed to start and run good when "cold".I could start my holley hp in cold weather and it doesn't have a choke provision at all.