Quote:
Originally Posted by mike@PSN
wow...
4lo .... start in 2nd ....build some boost...leave the line..once at wide open throttle maually shift to 3rd..... as long as rpm's stay high, stay in 3rd... and if at the end of the track the rpm drop significantly, drop back to 2nd... done deal. tire pressure should be messed with as well. i asked this same question a while back, that is what i was told..i got 4th out of 21 in the modified class... im not saying its the answer, but it worked for me, considering i was the only one not hanging weight in the top 10. here's how it worked.
YouTube - BigR at AV Fair Diesel Pull
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Quote:
Originally Posted by 08stroker250
Your missing what I am getting at dude!! I am saying that he is asking a question about the Spartan 275 tune on a 2008 6.4L Powerstroke and pulling a sled. Have you ever pulled a 6.4 with the 275 Spartan tune? Most likely not. That is why it irriates me when guys either dont pay attention to where they are posting or they post in the wrong thread period. Let a few people that have pulled with a 6.4 (Pahrump being one of them, who by the way has made several FULL pulls with a 6.4) tell him something about pulling with a 6.4 and 275 tune. Im not hating on the 7.3 or OBS guys...
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Quote:
Originally Posted by GM Duraturd
He was asking for opinions on a truck pull. I have been around sled pulling alot so I gave him my opinion. You never answered the OP's question either.
Are you obsessed with pahrump or something? his truck is amazingly sweet, but you bring up his full pulls every post. weird.
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Guys.. there are tons of variables that have not been discussed here. Gear ratios, tire sizes, track type... and others.
dzchey, I noticed that your pulls were on what I would call a very dry dusty track... and I can see how 4hi would work there... however here in central KY, the sorrounding area, we generally have sticky clay tracks that have better grip than pavement (but don't eat your tires up when you spin). Very few pullers in this area use 4 hi, and those who do, have most likely made a gearing change, or are way, way up there in horsepower. (The hottest 2.8 inducer class guys around here are easily over 1000 hp at the wheels!!!)
In general, pulling is pulling. There are some differences from truck to truck, but the driving style that works rarely changes.
My suggestion... choose your gearing based on the track... if it's a damp sticky clay, go with lo, if it's more of a loose dusty surface, try hi range. Use the brakes to build a small amount of boost, and then try to accellerate as fast as possible without spinning. It's a lot like driving up a hill on snow... you want momentum, but have to be careful how you try to get it. If it jumps, STOP. Bouncing breaks parts!!!