Fastest Comfortable HWY Crusing Speed?

[vortec]

hey, no option for 90+ on the poll. once i bury the needle, i start watching the tach and don't usually push it past 2800rpms for any extended time. 82 350 turning 31's. doens't shake, but potholes at that speed are very unpleasant.

 

[steve_kibbe]

can you say WOT

 

[cegusman]

My k5 with the 6.2/sm465/4.88/36" tires tops out around 45 maybe 50 downhill

with the 39" boggers I think it topped out around 60-65

 

[dirtwarrior17]

I've had both my moms mustang(she doesn't look at ck5) and my K5 on a LONG hill comin home from shasta lake... had the mustang up to 130 going down it and the K5 at about 90. I can honestly say going 90 in a 88 k5 with a 6 inch lift and 35's was more fun than doing 130 in my moms mustang. I had real bad shakes at about 50 mph when i first bought it... drive shaft was too short and tires weren't balanced. I thought my truck was gonna split in half. LOL I got the driveshaft retubed/lengthened for 200 and had big o do a free balance job and now i can cruise at top speed with no vibration.

 

[tRustyK5]

My k5 with the 6.2/sm465/4.88/36" tires tops out around 45 maybe 50 downhill

with the 39" boggers I think it topped out around 60-65

With my 6.2, 465 and 4.56's rolling on 39.5" TSL's I usually cruise at 60-65 mph. I've run it up to 80 mph but it does get some weird shakes there (tires have never been balanced) 50-55 is a lousy speed for my truck, that's where i get the tire shake. Once over 55 it smooths right out though.

With my 350 and 35's with 3.73's I managed 105 mph once. Not something I'd do again...it was actually pretty smooth, just not a good plan. There was so much wind resistance at that speed when I took my foot off the gas i alomst ate the steering wheel.

Rene

 

[MEPR]

i have had mine up to 90mph (used the GPS to clock that). That is as fast as i would ever go. I usually just cruise at 70-75mph, its perty comfy whith a 700r4 and 308s, the motor turns just about 2200rpm whith 31s.

 

[mtnman]

85's good - buck thirty is more fun but real loud!!!!! 33s 4:11s 5300 rpm

 

[destinbeachman]

Somewhere around 80 or 85.Without an accurate speedo I'm just ballparking it-66 Vette 427 running through a T350/203/4.10 combo with 37 MTR's gives me great highway gearing and those tires are the smoothest.I'm swapping my frontend and getting a Doubler and 40's but I'll keep the gears.Driving through town I'm only turning 1500 or so

 

[barneybirddog]

70 tops it out

I had the same set up with the 305 and 308 gears. I couldn't deal with the 305 so I just dropped in a 350. I can get up to about 70 . But when I swapped the motor I forgot to hook up the tv cable from the tranny and lost my overdrive. Tach reads about 2800 so I usually just cruise around 55 or so. I have a set of 373 with some 38's but I don't feel like swapping the lift kits out. Maybe next month I'll get motivated

 

[jekbrown]

no idea... speedo hasn't worked in 2-3 years... and there have been lots of mods and way bigger tires since then.

j

 

[rooferbret]

75 all the time on the freeway, any slower and i get run off the road

 

[chevydan3]

I have had my K20 up to about 95 without problems. Normally I cruise at about 65-75. I have 350, 700r4, 4.10 gears, 8 inch lift, 35's, stock style steering and no sway bar.