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Hmm......is this gonna help or nope!

Albert

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Ok friend has a 2018 suburban lifted pro comp 8” lift with Idk 35? With the 5.3 engine.
Soooooo he bought a 26 ft deck boat triple axle and yeaaaa you already know . He cant do pass 65 mph . I told him your gonna struggle towing that. So would there be a dded benefit to do the following ? 1) cold air intake 2) throttle command pedal 3) exhaust 4) rear gear the pumpkin? Or start over get the 6.2 or go to diesel and drop the mic? I know the knowledge here is sick!
 

Brobee

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I’m going to assume he has the 3.08 rear end and not the max trailering package with the 3.42 because he doesn’t sound like he plans that far ahead. With a 3.08 he’s going to struggle even without the lift and tires. As HitIt said above, a filter and exhaust isn’t going to do anything but make it louder. He’s going to need to regear. 3.73? 4.10 maybe?


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JUSTWANNARACE

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Gears! I would imagine if it's got 8" lift it's going to have at least 37s on it. I'm surprised it even gets out of it's own way if it hasn't been geared already, let alone towing.

What year is the burb. I would probably do 4:10s
 

Brobee

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Are we laying odds on whether it 2wd or 4wd?


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Bigbore500r

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Find out what tire diameter is, and Re-gear it accordingly. You’ll need to tune it to get the Speedo and shift points back in line. Nothing else will help like gears!
 

Dalton

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I’m going to assume he has the 3.08 rear end and not the max trailering package with the 3.42 because he doesn’t sound like he plans that far ahead. With a 3.08 he’s going to struggle even without the lift and tires. As HitIt said above, a filter and exhaust isn’t going to do anything but make it louder. He’s going to need to regear. 3.73? 4.10 maybe?


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hes got 35's.....gonna need 4.56 minimum
 

Spudsbud

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regearing= lower top end.
I'd trade it in on a diesel.
Either way...$$$$
 

Gelcoater

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hes got 35's.....gonna need 4.56 minimum
I agree. Heavy truck already, and small block torque. I’d error on the side of lower is better. With the giant lift and tires the guy has already committed big to horrible fuel mileage and not giving one shit.

I think while he’s got stuff apart he should do what he can to upgrade his breaks too.
 

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Regear. Anything else engine related will only burn more fuel and no speed increase.
 

spectras only

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Yeap, a proper setup with ecu swap for the Miata is close to 3K. I'm doing suspension and slicks, rollbar and a few other things to it. We had a 1990 Miata that we lightened it down to 1750 pound but kept the 1.6 engine and still achieved 2: 28 second laptime. We have a Honda S2000 [ 240HP] in the works with roll cage also that should be able to do low 2: 20's in the GTU Class.
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spectras only

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OP, re- gearing would be the best solution IMHO. I remember a guy with a Avalanche that had 4.10 gears towing a 33' Baja no problem.My son just bought an Escalade with the 6.2 engine [ 406HP ] and 3.42 gears and it's rated to tow only 7600lbs. So I guess for towing over that weight you'll need 4.10 for sure.
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River Runnin

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Just get a Fooking Prius! They will do and solve all issues! :rolleyes: 🤪
 

Flying_Lavey

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OP, re- gearing would be the best solution IMHO. I remember a guy with a Avalanche that had 4.10 gears towing a 33' Baja no problem.My son just bought an Escalade with the 6.2 engine [ 406HP ] and 3.42 gears and it's rated to tow only 7600lbs. So I guess for towing over that weight you'll need 4.10 for sure.
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The suburbans have a different rear chassis that the pick-ups and definitely a different rear end with a 4 link vs a traditional leaf in a truck. That combined with the much more curb weight of the Subtubs (and the different variants) result in the lower tow ratings even with the larger engines.

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Dalton

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Towing police say older trucks will out tow any new 1/2 ton lol.
its funny, older cars, specifically vans, scare the hell out of me now, compared with the modern safety equipment of vehicles
 

Willie B

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‘...97 Ram 12 valve Cummins 4x4 auto...bone stock except for K&N...3600 lb Lance...No clue what 63 Hallett flatty weighs...
...Made it up and over the great divide... no problem...Never had a problem towing or
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launching with it...
 
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