Launch?

Well i finally got my truck stalled and more or less finished im waiting on my retune but other than that truck runs great. The only thing i was wondering was when i take off from a dig should i stall it up and if so how much? my 4x4 isnt working at the moment hopefully n the next week or so i can get the TC-module out of sleep mode and i can just open up some 4x4 launches but until then what can i do? im prob going to be running a bolted duramax soon and if i can get infrount off the line i think i can hold him off. thanks for the help guys...

Umm common sense says stall it up as high as you can while keeping traction.

well even at 1000 i loose a good amount of traction. but if i stall it to 2000 it smokes the tires but seems to get to 60 alot quicker? just asking

Are you getting wheel hop or are the tires just worn.

i think alittle of both, im going to try and get those clamps soon.... and then i need to rotate the tires. i prob have 40% on the rears and 55-60% on the frount.

well i got the wheel clamps on, seem to help alittle. i still spin them but its not as bad and it feels like a smoother take off

Nice must have eliminated some axle wrap.

ya i think it helped some. plus the bottom springs wernt in line with the rest it brought that back :)

I say do one of two after you call the company you purchased from.and ask if they have tested flash launching over stalling it. That could help. I know with my saab i could brake stall to 3500 and cut 1.8s but flash stalling just enough to get the slack out the drivetrain i cut 1.7s all day.

ya ill have to call chris on monday. i love the stall just really need traction now

Mh cheaters!

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Originally Posted by Crazy Blu

I say do one of two after you call the company you purchased from.and ask if they have tested flash launching over stalling it. That could help. I know with my saab i could brake stall to 3500 and cut 1.8s but flash stalling just enough to get the slack out the drivetrain i cut 1.7s all day.

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With the exception of boosted vehicles, I've never seen a quicker ET from a high stall launch over a flash stall lauch.

so far this is what ive come up with... stall it up to 1600 ish let off the brake then rool into it so it dont spin then at about 30 mash it?

http://i786.photobucket.com/albums/y...ps1bc10da9.jpg

kinda dies off 50-70 tho? ever since the heads swap ive lost some threw that range? any ideas

Just do some testing. Some like the suspension preloaded some, other work better stalled up right to the point were the brake are about to give, and like in my case launch off idle always gave the best 60's.

When you say wheel clamps you mean clamping your overloads to your leafs?

You looking like your rev limiter may be to close to your shift point, causing it to hang up for a second. You want a slingshot effect into the next gear.

ya i clamped the front side of the springs. and you think i need to have it lowered? the rpm ... its shifting around 6200

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Originally Posted by darnie1987

ya i clamped the front side of the springs. and you think i need to have it lowered? the rpm ... its shifting around 6200

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I would be shifting higher then that, 6.4k and also raise your rev limiter high enough that you do not hit it. Your springs good enough to not float at that RPM?

Your recovery should be higher then that with that stall speed. Looks like your hitting limiter to me or it would be higher then that, 4.5K is what I would expect to see.

im running ls6 springs? and u sure higher than 6200? im running a tr 220 cam.

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Originally Posted by jmgak47

I would be shifting higher then that, 6.4k and also raise your rev limiter high enough that you do not hit it. Your springs good enough to not float at that RPM?

Your recovery should be higher then that with that stall speed. Looks like your hitting limiter to me or it would be higher then that, 4.5K is what I would expect to see.

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this is what im shooting for...

http://www.youtube.com/watch?v=GfmoV...layer_embedded

Even though your not making more power after 5.9k or so your still going to be faster reving past your peak. Your HP will not just fall flat off after your peak so take advantage of it. Also your shift extensions being higher is going to help.

Ill have to dig into it alittle more. I dont know much about the tuning thing. That othwr truck i posted is what im trying to achive. I know our trucks arnt rhe exact same but i should have alittle more power than his? Idk just seems off to me?

You notice his shift extensions are right at 5k also he is probably reving 6.5K or so because there is a bit of a pause at 6k. Yes his converter is a 3.5K which will make his extensions higher then yours by default, especially if its a smaller diameter stall. But rev that sucker a hair higher and make sure your not tapping limiter, do a log of some kind if you can.

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Originally Posted by darnie1987

Ill have to dig into it alittle more. I dont know much about the tuning thing. That othwr truck i posted is what im trying to achive. I know our trucks arnt rhe exact same but i should have alittle more power than his? Idk just seems off to me?

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Your truck being a 4wd and running 33's is not helping in the least. His stall is the really advantage he has over your truck mod wise.

Ya that and the cam. But cam wise im sure i make up for it with the heads, and the manifold. So ya gears and 300 more stall? Just seems like a huge diff between his and mine.

Would fuel have anything to do with it? I have tbss injectors and have been planning on getting a warbro but haven't been able to yet?