What size throttle body do I need for my manifold?
Many aftermarket manifolds use a 90mm or larger throttle body and use a 4-bolt flange. Depending on the year and model the engine came from, the throttle could be controlled differently. Some vehicles used a cable to control the throttle.
What size flange do I need for a throttle body?
The stock manifold is 78mm and uses a 3-bolt mounting flange. Many aftermarket manifolds use a 90mm or larger throttle body and use a 4-bolt flange. Depending on the year and model the engine came from, the throttle could be controlled differently. Some vehicles used a cable to control the throttle.
What year did Ford stop putting injectors in the throttle body?
Drive by wire throttle bodies were phased in starting in 2003. 1999 engines had 21.8-lb injectors whereas the later engines had 25-lb. injectors. …
Can you upgrade an LR4 engine block?
Upgrading the LR4 Engine Block There is no replacement for displacement. If you’re running boost, it’s common to overbore by.020 to 3.800 inches. The blocks can be taken to 3.905 (.007 oversize LS1) if it’s not going to see a lot of power.
Does changing your throttle body increase horsepower?
A bigger throttle body means more air And since the engine is basically a large air pump, increasing the air intake level will increase the engine's power output as well, in some cases by up to 15 to 25 hp.
How do I get more power out of my 4.8 Chevy?
2:138:03How to get more horsepower out of a 4.8L Chevy Silverado - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo swapping out the gears. Definitely will help with the power. Definitely help with the torque.MoreSo swapping out the gears. Definitely will help with the power. Definitely help with the torque.
What does a larger throttle body do?
2:353:09Speed Secrets: Does a Larger Throttle Body REALLY Gain Horsepower?YouTubeStart of suggested clipEnd of suggested clipAnd runner length you see while the bigger throttle body does help it's usually the intake doingMoreAnd runner length you see while the bigger throttle body does help it's usually the intake doing most of the heavy lifting.
What size throttle body should I use?
The general rule is: the bigger the size, the higher the RPM needed for a kick of power. If your new throttle body is too big your vehicle will feel tired at lower RPMs, while really taking off powerfully at higher RPMs (when the engine's demand of air flow matches up with the the internal bore'a bigger size).
How much HP can a 4.8 LS handle?
Run with the Comp 54-454-11 cam and new 26918 springs, the 4.8L responded with peak numbers of 441 hp at 7,000 rpm and 354 lb-ft of torque at 5,400 rpm.
How much horsepower can you get out of a 4.8 L?
Equipped with the stock heads, cam, and truck intake, the 4.8L produced 336 hp at 5,900 rpm and 347 lb-ft of torque at 4,900 rpm.
How much HP does a throttle body spacer add?
With a throttle body spacer, it is possible to increase the torque by 25 ft lbs and add up to 18 more horsepower. Not all throttle body kits can be used for all engines. Ensure that you get a kit that will work for the make and model of your engine. These spacers mainly benefit older engines.
How do I increase my throttle response?
One of the easiest ways to improve engine and throttle response is by making sure your fuel filter is clean. When you stomp on the gas pedal, it sends a signal for more fuel to go into the engine.
Is a throttle body spacer worth it?
6:358:39Is A Throttle Body Spacer Worth It? - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo I didn't really have any outtakes to share at the end of this video it was really a quick installMoreSo I didn't really have any outtakes to share at the end of this video it was really a quick install I didn't really have any issues installing that but I do have about a week of driving time now
Does a bigger throttle body increase mpg?
A cold air intake will improve throttle response and overall driveability as well, and fuel mileage should increase if you stay out of the throttle. Other airflow-enhancing upgrades include throttle body spacers and high-flow throttle bodies.
What size is a stock LS throttle body?
Most aftermarket manufacturers produce throttle bodies in the 90-105mm range (some slightly larger) for use with stock and aftermarket LS intakes. Most factory intakes will not accept a throttle blade larger than a 90-92mm due to design with impregnated gasket and bore relation.
What does a BBK throttle body do?
BBK Performance throttle bodies improve throttle response and acceleration. This throttle body will increase airflow to your engine adding more horsepower and torque to the wheels.
ACDelco 12679525 - ACDelco GM Genuine Parts Fuel Injection Throttle Bodies
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Cardone Industries 673010 - Cardone Remanufactured Throttle Bodies
This product cannot be ordered at this time. Future availability is unknown. We apologize for the inconvenience
What is a Gen 3 one?
gen 3 one is the go..... or chase around for a manual 4.8 one. if you get the manual 4.8 one you will need the 2 into 1 pipe between it and the manifold as they are different aswell.
Does 4.8 auto have a fly by wire throttle?
All 4.8 autos run a fly by wire throttle set up.. but different to the 3ltr version. they have a cable that runs up to a sensor mounted on the throttle body. the other side of the throttle body has the motor that drives the butterfly....
What size throttle body is used for a stock manifold?
The stock manifold is 78mm and uses a 3-bolt mounting flange. Many aftermarket manifolds use a 90mm or larger throttle body and use a 4-bolt flange. Depending on the year and model the engine came from, the throttle could be controlled differently. Some vehicles used a cable to control the throttle.
What is the intake valve size for a 4.8L?
Having the stock heads CNC machined will improve air flow and power. 4.8L and 5.3L engines have small intake valves. Going to a 2.000 in. intake valve adds flow. Lightweight LS3 valves can be cut to fit the seats as well.
How much horsepower can a LR4 exhaust handle?
An Aftermarket Exhaust. A Computer Programmer. The LR4, LM7, and L59 have very strong blocks. They can handle over 1,000 hp. using nitrous, a blower, or a turbo. However, you will need to upgrade the internals to handle that kind of power. The biggest bonus of buying a 4.8L or 5.3L engine is the low cost.
How big is a 4.8L bore?
The 4.8L and 5.3L have small 3.780 in . bores. Although they can be bored to LS1 sizes (3.898 in.+), the extra thickness can help head gasket seal. When combined with a 4.000 in. stroke, displacement can be as high as 383 c.i.d. (or 6.3L).
What parts do LS engines need to swap?
Just match the other parts you choose to support it. This is not just valve springs and rockers. It includes intake, heads, exhaust, torque converter, rear-end gears, etc.
Why upgrade fuel injectors?
Upgrading to larger Fuel Injectors is often needed to meet the fuel demand of increased power. Custom tuning will be required to properly adjust the fuel and ignition systems.
Is a LS6 intake better than a truck intake?
taller. If you are swapping the engine into a car, an LS6 intake is a good budget intake. The 90mm+ aftermarket intakes make more top end horsepower than the truck manifold. Keep in mind an automotive front accessory drive will be required.
maparicio2010
So i want to add a new breathing system that is affordable, so I'm debating on getting a throttle body, a spacer, and an intake. However I came across a 80mm throttle body, and the question came to me, what size is my stock throttle body now? and also if there is possibly a throttle body thats bigger then 80mm, but is still direct fit?
Fireman31
Do not waste your money on a TB spacer, they do absolutely nothing except make noise. The cost vs. performance gain of that TB isn't worth it either, stay with the stock 78mm. An air intake kit is always a good modification. Do you have any other mods?
NRSfire82
I just purchased a 2011 Silverado with a 4.8 and am looking for ideas to increase power and maybe fuel economy. Already have exhaust. I've heard different opinions on a new intake vs just buying a new filter??? Throttle body spacer and programmer have also been mentioned. Suggestions??? Thanks
yukon25008.1
spacer is a waist of time.. you bought the smallest motor that comes in a fullsize,how much better mileage do you want?
NRSfire82
Ok. Thanks for the input. What are your thoughts on Mass Air Flow Sensors?
KMGZ400
the only thing that will make a noticeable diffrence is a good tune, and after that the only thing that will make a bigger diffrence is a cam, turbo, things of that nature.
KMGZ400
maybe the GMT900's are diffrent, but i own a 2003 4.8 and a 2001 5.3 both with 3.73's and my 5.3 is way faster and feels a lot more powerful
Stevens03
Ok. Thanks for the input. What are your thoughts on Mass Air Flow Sensors?
jdelrizzle
maybe the GMT900's are diffrent, but i own a 2003 4.8 and a 2001 5.3 both with 3.73's and my 5.3 is way faster and feels a lot more powerful
Chris
Nope. I'm in the process. You need the intake manifold off a TBSS or an 07+ 4.8/5.3 for it to work. I am doing the TBSS manifold/rails/injectors to get the 87 mm Sent from my Samsung Galaxy S4 using Tapatalk 4
Chris
What Jenna said. A lot of money and works best with a cam upgrade from what I was told.
Jennabear
I would only recommend going with a larger than OEM throttle body, if you have an FI application (even then, should be a 100mm+ TB). Otherwise, you will see no gains.
Chris
The 75 mm is good that high? I am still trying to find better than 317 heads to run with a GT2-3 cam
Jennabear
Your MAF and your engine will be the limiting factors. I have seen ported/polished TBs that make absolutely no difference. Just throwing money at a part that won't give you much as far as gains, if any.
Gurrzt
What Jenna said. A lot of money and works best with a cam upgrade from what I was told.
travishale84
lots of good info on here, i wish i knew where to find cams and torque converters and other goodies to make my 4.8 wake up... i know id love to get new gears...