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08 GMC sierra vortec max

KingAz

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KingAz Enthusiast

KingAz

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Hey guys I'm new to this and I got a 2008 GMC sierra vortec max.... I got it dyno'd and my numbers are 292 HP and 306 tq.... I'm not sure if that's low but I have 35 inch tires and 20 inch rims with. A volant intake and magnaflow exhaust

KingAz Enthusiast

KingAz

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I think I posted in the wrong area lol. I was wondering what else can I do to get more HP without adding a turbo or supercharge. I got a custom tune but it had no HP increase just performance I think I need a different shop.

BlackZ71Silverado Senior Enthusiast

BlackZ71Silverado

Posted
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Different dynos will show different numbers, they are all different.

 

Not exactly sure the dyno type but I had my my 2008 V-Max dyno'd at our race engine builders shop. My stock tune numbers were 342hp & 339tq. with the GMPP (Borla) exhaust and GMPP CAI it went to

 

After his custom tune running 91 octane it is at 371hp/363tq., that was the best run. If I can find my paperwork I'll post it. Very happy with that truck. Plan ob having my 5.3 dyno'd some time this summer.

 

Just remember, the dyno numbers depend on type of dyno from what he said. I don't know which type he has but I know it's on the paperwork if I can find it.

Your best gains will be from a custom tune.

 

 

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crafferty Senior Enthusiast

crafferty

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What kind of dyno where you on? Different types of dyno's will yield a little bit different numbers. Plus air and engine temperature matter as well.

KingAz Enthusiast

KingAz

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Is your truck lifted? This shop supposedly tuned my PCM while it was on the dyno but I had no increase in power just performance. If I knew how to post pics I'd show my sheet

Is your truck lifted? This shop supposedly tuned my PCM while it was on the dyno but I had no increase in power just performance. If I knew how to post pics I'd show my sheet

BlackZ71Silverado Senior Enthusiast

BlackZ71Silverado

Posted
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My truck has a front leveling kit and 3" rear blocks in place of the factory blocks. Also factory size tires, cooper discoverer at3 E rated LT's on 17" wheels.

 

If your truck was tuned, your sheet will show improvement over stock, or at least it should.....Going to look through all of my vehicle paperwork tomorrow, hopefully I can find my dyno information to post.

 

Do you have AFM tuned out?

Torque Management?

Factory tires/wheels?

What grade of fuel?

 

I wish I could give you more specific information about the dyno but I just don't know:

 

 

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KingAz Enthusiast

KingAz

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I have 20" rims with 35" tires, I asked about the tq management he said he adjusted it and AFM also. But my dyno sheet shows 292 HP before and 292 after. I'm not an expert on the sheet but my performance looks steady after not up and down like before. It was just a roller dyno not sure the correct terminology for it.

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