[Jaercole]

Looking to hear from anyone who’s put a supercharger on a GMT400 Suburban 2500 with the 5.7 Vortec? I ask bc I’ve always wanted a green over gold GMT400 Suburban 2500 4x4 with the 7.4. I found a beauty but she’s got the 5.7. But I want to stay in the max towing range of 10K as with the 7.4 rather than 7K with the 5.7. So I was wondering if a supercharger would do the trick.

 

[Cowboytrukr]

I’m betting you’ve already checked this out?

Supercharger for a 5.7 Vortec, You Might Want To Consider Getting One

A supercharger for a 5.7 Vortec engine is the simplest way to boost the performance of your vehicle, Read on to learn more here

quartermileaddiction.com

 

[Jaercole]

I did Cowboy. Thank you though!

 

[ajbert]

Adding a supercharge will give you a power boost no doubt, but it will not increase your towing limit. Suspension and gearing will increase that, but keep in mind that there is no way to get your burb certified to up your limit.

 

[Jaercole]

Adding a supercharge will give you a power boost no doubt, but it will not increase your towing limit. Suspension and gearing will increase that, but keep in mind that there is no way to get your burb certified to up your limit.

It’s a 2500 GMT400. Same everything as with what a 7.4 would come with minus the 7.4. I know the horsepower will increase but I’m wondering about the torque.

 

[oldbaldfast]

Looking to hear from anyone who’s put a supercharger on a GMT400 Suburban 2500 with the 5.7 Vortec? I ask bc I’ve always wanted a green over gold GMT400 Suburban 2500 4x4 with the 7.4. I found a beauty but she’s got the 5.7. But I want to stay in the max towing range of 10K as with the 7.4 rather than 7K with the 5.7. So I was wondering if a supercharger would do the trick.

I installed a Procharger supercharger on my old 2000 Silverado 5.3. A word of caution: A supercharged engine runs hotter so you need to install electric radiator fans and eliminate the factory fan. Also plumb your intake through a cold-air system, purchase larger than stock injectors (I went from 23 lbs/hr to 46 lbs/hr), get the biggest intercooler that is available and get it professionally tuned. One last thing, maybe just buy a newer truck. I spent $10,000 + on mine (I did the labor) and could have spent more. It never ends. Have fun!!

 

[Jaercole]

I installed a Procharger supercharger on my old 2000 Silverado 5.3. A word of caution: A supercharged engine runs hotter so you need to install electric radiator fans and eliminate the factory fan. Also plumb your intake through a cold-air system, purchase larger than stock injectors (I went from 23 lbs/hr to 46 lbs/hr), get the biggest intercooler that is available and get it professionally tuned. One last thing, maybe just buy a newer truck. I spent $10,000 + on mine (I did the labor) and could have spent more. It never ends. Have fun!!

Thank you for the response. I’ve no interest in a new truck. I absolutely love GMT400 Suburbans. I’ve heard I want to find a supercharger that will give me low and mid range boost like a roots or twin screw charger over a centrifugal that gives top end boost? What kind was the Procharger you used?

 

[Mint01]

It’s a 2500 GMT400. Same everything as with what a 7.4 would come with minus the 7.4. I know the horsepower will increase but I’m wondering about the torque.

Your looking for a band-aid. Won't work. Torque is not the same as horsepower.

 

[oldbaldfast]

Thank you for the response. I’ve no interest in a new truck. I absolutely love GMT400 Suburbans. I’ve heard I want to find a supercharger that will give me low and mid range boost like a roots or twin screw charger over a centrifugal that gives top end boost? What kind was the Procharger you used?

I’d characterize it more of a belt driven turbo that spools up through a gear box. The Whipple or Magnuson will give you instant torque. My 5.3 (I didn’t get a stock baseline) dyno’d (RWHP) at 336 hp and 340 torque. It was quick for a 1/2 ton 4x4. It had 4.10 gears so low end torque was enhanced.

 

[Jaercole]

Excellent. Your experience was exactly what I was looking for. Thank you for responding!

 

[Montemike]

Excellent. Your experience was exactly what I was looking for. Thank you for responding!

Let us know how your project works out.
Mike

 

[Jaercole]

Most recent quote was 9K for a supercharger. I don’t tow anything anymore but just wanted a little more out of this 5.7 so I’ve decided to put some BBK shorty headers on it, remove the cats and add some MagnaFlow mufflers. Then will be taking it to a GM performance shop nearby to have her tuned. I think I’ll be happy with those results.

 

[RayVoy]

I think a tune would be the way to go.

You don't say the mileage; but you wouldn't want to add a lot of boost and break something on an older engine.

I have to take exception with a statement made earlier, a supercharger will increase low end torque, and as he said, it will also add to upper end horsepower.

I had an Olds with a Buick 3.8 that was factory supercharged. The best engine I ever owned, it would break loose with part throttle.

I don't think I ever towed with it; but I know it would have moved a good size trailer.

 

[Jaercole]

Hey Ray! Good to hear from you my friend! I sold the 06 8.1L. Just don’t need her anymore since we got rid of the trailer. And I’ve always loved the GMT400 Suburban 2500 4x4body styles. And this green over gold is my favorite color scheme. I just want to wake up this 5.7 a tad. Nothing super crazy. I have no experience with superchargers and did not realize how expensive they were. So like I said I’m going to put some shorty headers on. Remove the cats. And install some comp cams if I can afford that? I’ve read cams and exhaust upgrades on these 5.7 vortecs can produce an increase of 60 HP alone!

 

[RayVoy]

That is a beautiful truck, nice score

 

[Montemike]

That is a very nice truck, it looks clean.