1993 Chevy ½ ton Drag truck

[EagleMark]

7.90?

Oh on 1/8th mile... man that would be one fast truck at 1/4 mile!

[1leg]

I should have said that i want it to stay street legal in California. Maybe in the future it will go faster but for at least the next few years it will remain a DD. i typed that wrong should have been 8.90

8.90 in 1/8mile = 13.90 in the 1/4mile.

[EagleMark]

Still fast for a full size truck!

Ever thought about a shot of nitrous?

Lower gears can make you go fast, fast but that depends on your need for highway driving.

Probably easiest way to go fast on a stock motor for drag racing is a WideBand O2 sensor and use your PE AFR table. Since it's all WOT watch your wideband and adjust PE AFR get down to 12.8 to 1 or so, wideband would be accurate, PE AFR is a guestimate off VE table, high test fuel, add spark and watch your knock sensor.

Oh and we want videos when it happens!

[1project2many]

Sounds like a fun goal.

How about retarding the cam, changing to numerically lowest gears possible (3.08 may be a possibility) and slapping the 4wd lever into 4 Low? In town, light to light, I've pissed off some pretty fast cars in a beat up old stock blazer by using 4 low. Open the divider between the two sides of the intake, maybe cut down the valve guides, install a set of Comp beehive LT1 springs, an Ebay factory LT1 or L31 roller cam, and some roller tipped 1.6 rockers and just keep winding 'er up until something blows. With three wheels driving you'll be one of the few guys at the drags with too much traction and at a 1/8 mile track the extra 2.72 gearing would allolw you to use all the tranny's gears. Research and a little extra work might allow something as cool as the ZF 6 speed truck trans with an AWD xfer case having low range so you've got plenty of gear, a way to relieve driveline tension, and an engine that is still close enough to stock to be street legal.

[EagleMark]

Ha! I told him to go up in gears and you told him to go down and use the transfer case! Most are 2 to 1 ratio. Brilliant! Keep the 4x4, no traction issues. Might have to chain the engine to frame to keep motor mounts in and start in second? Man that would launch!

[1project2many]

3.08 gears and the stock transfer case puts final drive at 8.38:1. That's the type of gear ratio we used to use in the 4 cyl roundy round cars running 1/4 mile ovals. With those gears you could get a hard launch with a set of bicycle cranks driving the driveshaft. I should fire up one of my drag times calculators and see if it chokes on that final drive ratio. :)

[1leg]

There is two reasons for removing the 4wd one is because i don't need it. my suburban is 4wd and it will stay that way. the second and most important is weight reduction. I know i will not make the horsepower with a tbi to get the truck to the ET i want. So it will be attacked on two fronts engine/trans tuning and weight loss.I hope to get the weight down to around 3500lbs or less and make some where around 300-350hp. I hope to still be smog legal.