how much hp is gained from these 3 bolt on product

danny_boy510 · November 21, 2005

does anyone how much hp is gained from these 3 bolt on product.. i currently have a air raid throttle body spacer plus a a.e.m intake and a 40 series flowmaster exhaust with a 3 in inlet and 3 inch dual out let .. does anyone know around how much hp is gained this truck stock is 295 .. well let me know how much is gained if yall got any answerers because i unno. if someone has the same products as me let me know asap

Wingnut · November 21, 2005

Rear wheel? 10, maybe 15.

That stuff doesn't help as much as people like to believe...This is, of course, my opinion...You'll get many others.

Best bet/bang for the buck? Get a custom tune for that rig and make the best of those mods.

toydeluxe · November 21, 2005

Each manufacturer of each product claims their product can gain up to 15hp, but those gains don't necessarily apply to "everyone's" application.

I tend to agree with the guy above.........you're realistically only gonna see about 10-15hp of a gain, TOPS, at the rear. Enough to notice a slow change in feel, but nothing major.

trever1t · November 21, 2005

You have a single 3" in and duel 3" out? If so you are losing power, not making any. Unless you have forced induction, you should have 2+1/2" duel out.

willieboy · November 21, 2005

I agree with trever1t... I would say you have lost torque and possibly HP with that setup. Take the spacer off, it does NOTHING. The AEM intake, maybe 1-2 hp, in reality not much, not anything you are going to feel. The pipes are killing you for sure. Most of what you have done will make it loud, which may give you the illusion of more power, but you are not likely to gain power.

trever1t · November 22, 2005

Right, spacer does no good on late model GM motors. Fuel is injected and not mixed in throttle bodie like older trucks. Spacer is only making the path for air longer-no good.

If you want to improve economy (performance) then get rid of the spacer, go to a 2+1/2" pipes from muffler back and get a cold air intake.

You can get a handhelp programmer but a "tune" will really make the difference.

What model and year of motor are we talking about here anyway??

danny_boy510 · November 22, 2005

v8 5.3 liters

Right, spacer does no good on late model GM motors. Fuel is injected and not mixed in throttle bodie like older trucks. Spacer is only making the path for air longer-no good.

If you want to improve economy (performance) then get rid of the spacer, go to a 2+1/2" pipes from muffler back and get a cold air intake.

You can get a handhelp programmer but a "tune" will really make the difference.

What model and year of motor are we talking about here anyway??

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jwalker · November 22, 2005

I purchased the Gibson 3 inch Swept Side exhaust system, single outlet just this week. I choose this system because the Gibson tech guy informed me that the single outlet system made more torque & HP than any dual system they made for the 5.3.

So I took his info & called Flowmaster & Magnaflow. Their tech guys verified the same info about their systems as well.

Realistically, you should see a 10-15 HP gain & 20 lb ft of torque just with the exhaust I mentioned. The open air element should give you roughly 10 hp. If you would've added the Granatelli MAS to your equation, you'd see 10 -15 HP gains on top of that. Keep in mind in order to take advantage of a aftermarket, free flowing exhaust, you need the most efficient, free flowing intake system as well. Think of an engine as nothing more than a big air pump. Any restriction on one side or the other is going to cost you performance.

unkleJ · November 23, 2005

I hate to burst everyone’s bubble, but the stock exhaust diameter is 2.75", not 2.5". And I have a Magnaflow catback exhaust that is 3" in diameter and I have gained horsepower from it. I don't have any dyno numbers to show, but I do have a lot of track data to back up my claims. I went from a 15.77 to a 15.18 just from the exhaust and some better weather at the same track. I attribute at least 0.3 seconds to the exhaust. I then added a ram air system to the stock airbox that was worth 0.1 seconds. These are my only mods.

I just ran my truck at a different track (known to be at least 0.1 seconds faster than the other track I ran previously) and I ran my best of [email protected] with the best air conditions that I seen to date.

Putting the right exhaust on your truck WILL make more horsepower. However, I have heard of people losing horsepower with a flowmaster muffler. They are labeled "chokemasters" at ls1tech.com and performancetrucks.net.

Wingnut · November 23, 2005

I purchased the Gibson 3 inch Swept Side exhaust system, single outlet just this week. I choose this system because the Gibson tech guy informed me that the single outlet system made more torque & HP than any dual system they made for the 5.3.

So I took his info & called Flowmaster & Magnaflow. Their tech guys verified the same info about their systems as well.

Realistically, you should see a 10-15 HP gain & 20 lb ft of torque just with the exhaust I mentioned. The open air element should give you roughly 10 hp. If you would've added the Granatelli MAS to your equation, you'd see 10 -15 HP gains on top of that. Keep in mind in order to take advantage of a aftermarket, free flowing exhaust, you need the most efficient, free flowing intake system as well. Think of an engine as nothing more than a big air pump. Any restriction on one side or the other is going to cost you performance.

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So, you're saying that by adding a catback, a MAS, and an "open air element"...He can gain 40 hp?

willieboy · November 23, 2005

I hate to burst everyone’s bubble, but the stock exhaust diameter is 2.75", not 2.5". And I have a Magnaflow catback exhaust that is 3" in diameter and I have gained horsepower from it. I don't have any dyno numbers to show, but I do have a lot of track data to back up my claims. I went from a 15.77 to a 15.18 just from the exhaust and some better weather at the same track. I attribute at least 0.3 seconds to the exhaust. I then added a ram air system to the stock airbox that was worth 0.1 seconds. These are my only mods.

I just ran my truck at a different track (known to be at least 0.1 seconds faster than the other track I ran previously) and I ran my best of [email protected] with the best air conditions that I seen to date.

Putting the right exhaust on your truck WILL make more horsepower. However, I have heard of people losing horsepower with a flowmaster muffler. They are labeled "chokemasters" at ls1tech.com and performancetrucks.net.

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Yeah, but he has dual 3 inch pipes, not a single. BIG difference.

willfxp · November 23, 2005

I hate to burst everyone’s bubble, but the stock exhaust diameter is 2.75", not 2.5". And I have a Magnaflow catback exhaust that is 3" in diameter and I have gained horsepower from it. I don't have any dyno numbers to show, but I do have a lot of track data to back up my claims. I went from a 15.77 to a 15.18 just from the exhaust and some better weather at the same track. I attribute at least 0.3 seconds to the exhaust. I then added a ram air system to the stock airbox that was worth 0.1 seconds. These are my only mods.

I just ran my truck at a different track (known to be at least 0.1 seconds faster than the other track I ran previously) and I ran my best of [email protected] with the best air conditions that I seen to date.

Putting the right exhaust on your truck WILL make more horsepower. However, I have heard of people losing horsepower with a flowmaster muffler. They are labeled "chokemasters" at ls1tech.com and performancetrucks.net.

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A lot of addons can give you the power at higher RPMs but actually lose power at lower RPMs. If you had a dyno, you'd see it. Since you are WOT, you'll see the power while many of us won't.

unkleJ · November 23, 2005

Yeah, but he has dual 3 inch pipes, not a single. BIG difference.

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Oh, I didn't realize that. In that case, I agree, true dual 3" exhaust may hurt performance, but dual 3" out of the muffler I'm not sure (I have no experience with that type of setup). However, a single 3" will help free up a few horsepower. The biggest problem here is the flowmaster, I have heard and seen people either gain little to no HP or even lose HP with a flowmaster muffler. It seems that they are only good at making noise.

For the record, I don't believe that you can add up all of the advertised HP gains from each part and realistically expect to gain that much HP. If your mods work well with each other you will gain horsepower, 10 here, 5 there, eventually you will see a difference.

Jeff