Air Flow

stumpuller454 · 02-15-2008, 08:20 AM

hey guys wondering if anyone has fooled around with larger throttle bodies and/or airflow sensors ona vortec engine, i`v heard good and bad, i`ve more commonly heard that to use bigger injectors with the body and sensor upgrade. am considering multiple options here, ie bigger throttle body, airflow sensor, air intake, cam and headers, thanks

stumpuller454 · 02-15-2008, 08:28 PM

i wish somebody messed with their truck first, and could tell me, oh well gonna get a price on everything and report back in a month or so, gonna try it all i think!

rdillon · 02-15-2008, 09:07 PM

With the right amont of money you can go as fast as you want to. I would not blow money on a air intake system for $200. Instead go to that notorious online auction site and look around. I found a set of bigger injectors for cheap using your trucks description. Shes 10 years old there are alot of performance parts out there. Again alot of them give you rear wheel horsepower ratings.

Whipple 1993-2002 454/502 Magnum EFI/MPI Supercharger Kits

jdfenske · 02-16-2008, 04:01 PM

i put on aftermarket heads
i knew someone with the same heads and cam i'm using and they went the extra effort and money and bought higher flow injectors, and didn'dt make much difference. i mean, probably 10hp, but nothing noticeable without a dyno and fancy measuring tools.

i'm using oversized intake and exhaust valves, along with a low rpm cam with a high lobe. took 2 or 3 weekends and using a dremel and hogged out the passages and all thet good port and polishing stuff. made quite a difference from 800 to about 3500, anything past that it gets gutless. but these days everyone uses oversized tires and drives in overdrive, so, i figured i'd shoot for torque at lower rpm and set it up to breath. using the factory intake throttle body and a k&n. oem sensors and injectors.

but you ask any engine rebuilder, and from experience myself, NOTHING will beat an engine with fresh rings and crisp valves for horsepower. a fresh 305 will easily keep up with a old tired 350.....

stumpuller454 · 02-16-2008, 07:11 PM

yeah, im actually gonna call a place nearby that does custom ecm tuning and see if they have done anything with the 454`s, then see which direction to go, i just wanna drop some jaws and **** of some deisel drivers!

02-15-2008, 08:20 AM	#1
stumpuller454 Senior Member Join Date: Dec 2007 Location: Alberta Posts: 786	Air Flow hey guys wondering if anyone has fooled around with larger throttle bodies and/or airflow sensors ona vortec engine, i`v heard good and bad, i`ve more commonly heard that to use bigger injectors with the body and sensor upgrade. am considering multiple options here, ie bigger throttle body, airflow sensor, air intake, cam and headers, thanks

02-15-2008, 09:07 PM	#3
rdillon Full Member Join Date: Nov 2007 Location: Houston, TEXAS Posts: 22	With the right amont of money you can go as fast as you want to. I would not blow money on a air intake system for $200. Instead go to that notorious online auction site and look around. I found a set of bigger injectors for cheap using your trucks description. Shes 10 years old there are alot of performance parts out there. Again alot of them give you rear wheel horsepower ratings. Whipple 1993-2002 454/502 Magnum EFI/MPI Supercharger Kits __________________ 2005 Chevy 4x4 LS 5.3L BFG KO's Sucks gas but hauls a** 1985 F150 5.0L EFI Old and slow. Used as a decoy when parked at work 2 weeks at a time... Really not a bad truck 16 mpg

02-16-2008, 04:01 PM	#4
jdfenske Senior Member Join Date: Jan 2008 Posts: 105	i put on aftermarket heads i knew someone with the same heads and cam i'm using and they went the extra effort and money and bought higher flow injectors, and didn'dt make much difference. i mean, probably 10hp, but nothing noticeable without a dyno and fancy measuring tools. i'm using oversized intake and exhaust valves, along with a low rpm cam with a high lobe. took 2 or 3 weekends and using a dremel and hogged out the passages and all thet good port and polishing stuff. made quite a difference from 800 to about 3500, anything past that it gets gutless. but these days everyone uses oversized tires and drives in overdrive, so, i figured i'd shoot for torque at lower rpm and set it up to breath. using the factory intake throttle body and a k&n. oem sensors and injectors. but you ask any engine rebuilder, and from experience myself, NOTHING will beat an engine with fresh rings and crisp valves for horsepower. a fresh 305 will easily keep up with a old tired 350..... __________________ 1996 Z71 white shortbox tinted 350 30 over cats and X pipe Alumhds ported 210 cc runners 62 cc chambers 2" int 1.550" ex crane lift; 580/580 duration; 216/222 4L60E w/shiftkit

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02-15-2008, 08:28 PM	#2
stumpuller454 Senior Member Join Date: Dec 2007 Location: Alberta Posts: 786	i wish somebody messed with their truck first, and could tell me, oh well gonna get a price on everything and report back in a month or so, gonna try it all i think!

02-16-2008, 07:11 PM	#5
stumpuller454 Senior Member Join Date: Dec 2007 Location: Alberta Posts: 786	yeah, im actually gonna call a place nearby that does custom ecm tuning and see if they have done anything with the 454`s, then see which direction to go, i just wanna drop some jaws and **** of some deisel drivers!