What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[swathdiver]

150 shouldn't be bad at all (if you can get it there) I have ran mine 130+ and she sails smooth as glass, you do get some noticeably increased wind noise

***pretty sure you would need different gearing anyway the 3.42 3.73 just isn't going to get there without increased rpm, @swathdiver what would it take 7k 8k???

Well, your Denali would be turning about 4600 rpms (mathematically) at 150 mph in 5th gear.

 

[Doubeleive]

Well, your Denali would be turning about 4600 rpms (mathematically) at 150 mph in 5th gear.

so basically if it was lowered to 1' off the ground the roof was cut off it might hit 150

 

[Kee Fuller]

Yessir

GM Accessories #338-19171554

How much they run you?

 

[Doubeleive]

How much they run you?

I saw a couple of them on ebay for about $75 and some change

 

[Kee Fuller]

I saw a couple of them on ebay for about $75 and some change

Link? Need one in black

 

[swathdiver]

so basically if it was lowered to 1' off the ground the roof was cut off it might hit 150

I was thinking of this and on another forum saw a fellow also wanting to cruise at 110 and came across this photo:



If true, this fellas truck needed a whole lot more rpms to overcome the drag at that speed. I know he was in Texas and believe that this was a GMT900 6.2 Silverado and those have 3.73 gears.

 

[Doubeleive]

I was thinking of this and on another forum saw a fellow also wanting to cruise at 110 and came across this photo:

View attachment 256768

If true, this fellas truck needed a whole lot more rpms to overcome the drag at that speed. I know he was in Texas and believe that this was a GMT900 6.2 Silverado and those have 3.73 gears.

ya that's kind of why I figured more rpms obviously in a lower gear to overcome the drag, the top speed in these trucks is approx 137, in stock form, the main limiting factor being the rpms

 

[Doubeleive]

I see he was at 125 I can hit that pretty easy in just over a mile, once you hit about 130 then it takes more time to max out

 

[Doubeleive]

reminds of a time I was down by mexico doing about 160 in my friends Mazda and I swear 2 guys passed me like I was standing still,I don't know what they were driving but they were scooting.

 

[07Burb]

I saw a couple of them on ebay for about $75 and some change

I’ve had these for years. I originally paid $400 for them. Probably cheaper now I assume