Good points Justin.

I need to point out a larger obstacle to overcome in the OP's quest for Street Hero status.

We're pretty close, driveline-wise, to that goal already; for instance, the '05 in current configuration can max out at 144mph, assuming it was tuned for the required power level.

However, with triple-digit trap speeds aerodynamic forces are far harder to overcome than inertial acceleration.
Without getting into the specifics of parasitic drag, induced drag (yes, vehicles exhibit lifting-body characteristics at speed) and boundary layer phenomenas, just consider the effort required by the general coefficient of drag.
Basically, drag increases by the square of delta velocity, and since work = force X time, moving twice as fast at STP needs 8 times the power.
For instance, a truck that uses 100 RWHP to travel 75mph airspeed on flat ground would require 800 RWHP to reach 150mph in the same conditions.

The '05 will do 118mph, but the next 10mph would probably need an extra 50HP, and the next ten an additional 100HP, and so on.

 

5spd and 4.10's, u won't be going 150 anytime soon. Factor in a ring, pinion and carrier for the Dana 80 so u can go atleast 100 without rpms above redline, lol.

 

Yes, I completely ignored the aero aspect because his question just asked about gearing.

If you're shooting for really high speeds of 150+, then it's more effective to focus on aero improvements vice HP improvements.

The Banks Sidewinder Dakota is a good example of aero treatments applied effectively. Note that this truck cleared well over 200mph with less power than many of the big dog CTD guys run; it "only" had about 800hp.

I'd suspect that your figure of 100hp @ 75mph is actually quite close to reality, so your figure of 800hp at 150mph is also VERY close to actuality in my estimation.

That means that you can attribute roughly 50mph of the Sidewinder's top speed just to aero improvements.

If Banks had just tried the brute HP method, it would taken almost 1900hp to hit 200mph with the same drag that takes 100hp to hit 75mph.

So their aero treatment basically gained them almost 1100hp. Not too bad.

 

you should try waking up first...then realize that smoking 6 tires is not that big of a feat.

going 150 in a 4x4 truck is just stupid, if you wanna do it with a cummins, thats cool, do it with a lowered 2wd truck that is built for speed. ive had my truck to 120 a couple times on 35" tires and it was enough to scare me that i rarely see over 95 anymore, 99% of the time i will not even shift from 5th to 6th just because i know the truck wont go any faster if i leave it in 5th

 

Hmm - when I close my eyes, I can't tell the difference between 80 and 115mph in the '05...

- now you want scary, that'd be opening up the outboard carbs on the GTO in 3rd gear with bias plys... and having the stones to stay with it 'til you grab 4th at redline.
No wonder they say "stand on it 'til ya smell it!" (sic)

We were running those A-body chassis/suspensions in the '70s at 130mph - why do you think I earned my pilot's license so early in life?

 

The title said smoke all 6 AND do 150...maybe you were a little sleepy. 150 is really stupid in a truck(or any vehicle) that has not been properly prepared to handle it. The point is NOT to do it the conventional way or I wouldn't do it in a truck. I'd just jump in a SPORTS CAR. It is about expanding the envelope of the possible in a reletively sane, albeit expensive, manner. Thanks for your input anyway, getblown.

 

I agree with getblown5.9, I have no GSK and I can run 105 WOT in my truck. I don't need to go any faster. GET GAUGES!!! Lower your dually to the ground change wheels and tires to a speed rating of 150. spend 1,300 on injectors, take out your fuel plate, put some laser cut DV's, get a FASS pump and bigger fuel lines, spend 6,000 on turbos and attempt to supply enough air, Put a 6,000 auto tranny, billet shafts, 60 lb valve springs. Oring and arp stud your head, Upgrade all sway bars and anything under there thats upgradeable. Put on a fire suit and helmet get the turbo spoolin and let her rip, and you dont hear a boom and your rear end doesnt look like gravel flyin in the rearview and the drive shaft hasnt twisted like a pretzel and your haulin @$$ your probably gonna A- see high temps ignore them and melt somethin B- Fly of the road or into something or C- it'll go ok and youll wanna keep doin it till you or your tucks is injured or D- all of the above. just my 02. But if thats what you wanna do go for it, Im sure 120 seemed like insanity at one time or another.

 

The history of competitive motorsports is steeped in the proud tradition of purposeful insanity.

 

HEY! I've done that man! Kept right on the deuces until I got tired of listening to them wail......... Don't know how fast, didn't care, loved them spring nights with 3 deuces WFO!

Of course I was an insanely STUPID young kid.........What is the saying, Children and Fools rush in where Angels fear to tread?

I miss my 66, but selling it probably made it possible to keep my license.

 

I get scared when my truck clears 100. If anything, the Smarty will let me LOWER the speed limiter. Kinda like a valet function for when someone else is driving. Between that and the "half power" SW of the Smarty, I can almost idiot-proof the truck.


I can't say I've had a thrill ride like you guys describe in an A-body. But I did have a rather scary encounter in a '71 F body with a tunnel rammed 540" BBC with ultradyne roller cam (back before Howard went to Lunati) running 14:1 compression.

I was screaming for him to let off at 165+ and he finally did. I never talked to him again. Just another reason high school kids can't be trusted with 800hp big blocks. The roar of dual Dominators at 7K rpm is something you won't soon forget. I swear we were close to getting airborne with the "lifting body" aerodynamics of those 2nd gen F-bodies!

 

You can do it, but it would be some work. I would look into an overdrive kit and some higher speed gears/ taller tires. Your truck will do a burnout, if you have 1200 to 1500 ft*lbs, you'll melt rubber trust me. using a 4x4 truck for forget about it.

 

What do you want to do 150 in a street drive 4x4 dually for? Its not safe for you or others with you or on the road. Ive ran mine out to 120ish, it hits 126 at 3200. My buddy is one of them mustang go fast guys and he had a 03 cobra wit 600hp, every where we could it was 160 170mph which is nuts. But not a crazy as his other car. He had a 64 shelby 427 built. 10 inch winsheild, we hit 226 on gps with that thing once, and i would never do it again. It was scary and to think about what could of happened gives ya the shivers. But you can do what ya want but its gonna be a bunch of dough to get there safely.