I’ve called numerous shops all over Texas and all I keep getting are excuses on why they can’t dyno my awd yukon.

1. truck too long
2. gotta take the front driveshaft out
3. can’t go 100 mph
4. must tune along with dyno

the list goes on and on so I’ve basically given up on getting some dyno pulls. My trucks already tuned and runs great, I just wanted some numbers.

so I’ll just take some guesses from you guys just to see what y’all think

2005 GMC Yukon Denali
176k
Whipple 2.3 with 3.00” pulley
Airaid tb spacer
Airaid open filter element
stock Delphi fuel pump with kb bap
tuned

 

Go run it at the track and weigh it then post up numbers.

 

that’s true. I’ve already got another thread on here that talks about that. I talked about why I couldn’t get better 1/4 and 60’ times with all that I had in the truck. I’m headed to the track tomorrow. Only real changes will be that I found and fixed a kinked intercooler hose that was probably seriously heat soaking the blower and not allowing it to properly cool down during/between runs. I’m gonna try foot braking off the line versus just mashing the gas outta the hole on green and also gonna turn off stabilitrak/traction control. All of these things I haven’t done and am gonna see if I can make any improvements with them.

 

To be fair unless you upgraded your driveshaft I wouldn't take it over 100 mph either.
Pull off the throttle body spacer and sell it to get some money for the driveshaft.

 

hope this doesn’t turn into another meaningless roast fest. I’m looking for honest opinions and feedback from gear heads, not useless commentary and sidebars from the peanut gallery. I’m not removing anything from my truck and I’ll take it to whatever mph I choose

 

The driveshaft was serious but do you then. That is a known fact that 100 MPH is the max with a stock driveshaft. Can you go over that number? Sure. Are you guaranteed to come out in one piece? No, eventually it will snap.
I wish I still had the video of that truck on the dyno where the driveshaft snapped and stabbed the gas tank or something along those lines and set the shop on fire. Burned down the entire building and was pretty bad. That might actually make you realize why those shops won't do it and why you should take caution.

The tb spacer was only a joke but it seems you are emotionally attached.

Edit: Also if they "must tune while dyno" just save your current tune and then reupload when you leave. That is what I would do at least.

 

The only reason he mentioned not going over 100mph is the fact that the driveshaft critical speed is usually somewhere around that and it can come apart on you. And that makes for some cool noises if you have never had that happen before.
Also the Throttle body spacer is just a gimmick is the other reason he mentioned that. They just take your money and give you nothing in return.

Will you be able to datalog your passes at the track tomorrow?

 

im serious too, I didn’t ask about my driveshaft. I asked specifically about horsepower predictions. I’m not emotionally attached, not sure where all this animosity is coming from. Maybe y’all just answer folks questions instead of dissecting their entire build.

 

yes I can datalog but I’m not going too. The last guy I sent my datalogs too on here didn’t even give me any useful information so I’m just sticking to hp predictions only. Keep all sidebar and personal comments to yourself

 

You do get that the reason he mentioned it at all, is because you might exceed that speed at the dragstrip. You do get he is trying to keep you from exploding your drive shaft what could be any day this week.

Your entire build so far that we know, includes an air filter, a throttle body spacer, and a supercharger. EVEN I get that you don't know what the hell is going on. Think about what a throttle body spacer does. They work for carburetors because they extend the plenum (the atomized fuel travel distance is longer and accelerated). On a TB engine, the injectors are after the manifold. All a throttle body spacer does on an LS is increase the intake manifold's volume, by the size of the spacer internally. They do nothing but give you less engine bay room.

The only animosity was started by you getting all butt hurt because someone tried to keep you from destroying your truck with a simple comment. You have a lot to learn about a lot of things.