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AWD Bounce Drag Launch?

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Old 03-04-2021 | 06:32 PM
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What was the deal with that car in the first video? Home boy going around the world lol

I would say you need more travel for the shocks to work, right now doesnt look like you have much of any. Are the shocks set full tight on both rebound and compression? Try more split than that. In the front have the rebound full tight and compression half tight, and the opposite of that in the rear.
Old 03-04-2021 | 07:05 PM
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Originally Posted by Atomic
What was the deal with that car in the first video? Home boy going around the world lol

I would say you need more travel for the shocks to work, right now doesnt look like you have much of any. Are the shocks set full tight on both rebound and compression? Try more split than that. In the front have the rebound full tight and compression half tight, and the opposite of that in the rear.
I only have single adjustable in the front and in the videos it's full tight plus front end limiters very tight. In the rear I'm full tight on compression and rebound since they're DA. So you think I should try rebound half tight and compression full tight in the rear? What about the front since it's only single adjustable? Thx!
Old 03-04-2021 | 07:25 PM
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That guy in first video spun really bad and just made a right after the k rail to get back in line!
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Old 03-04-2021 | 08:29 PM
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Originally Posted by Atomic
What was the deal with that car in the first video? Home boy going around the world lol
Damn turbo LSs. Lost already. Eff this, I'm outta here!
Old 03-04-2021 | 08:59 PM
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I think a big part of the problem is you have very little suspension travel because of the bumpstops (compression) and chains/straps (rebound). You need to give the shocks some room to work so you dont smack a limiter and start bouncing. Asking the shocks to soak up all that movement in like 2inches of travel is asking a lot. With 4wd/awd you want to treat it like a front wheel drive, ie, keep the front down and planted. Its ok to let it come up some, but it has to be controlled (ie, stiff rebound adjustment) and not smack the limiter (chains) and if it wants to go back down let it (lower compression). The opposite with the rear, you dont want it to squat as much (high compression) but you do want it to extend (light rebound setting).
Old 03-05-2021 | 12:39 AM
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Originally Posted by Atomic
I think a big part of the problem is you have very little suspension travel because of the bumpstops (compression) and chains/straps (rebound). You need to give the shocks some room to work so you dont smack a limiter and start bouncing. Asking the shocks to soak up all that movement in like 2inches of travel is asking a lot. With 4wd/awd you want to treat it like a front wheel drive, ie, keep the front down and planted. Its ok to let it come up some, but it has to be controlled (ie, stiff rebound adjustment) and not smack the limiter (chains) and if it wants to go back down let it (lower compression). The opposite with the rear, you dont want it to squat as much (high compression) but you do want it to extend (light rebound setting).
interesting, thx for the details. I have the limiters in the front all the way tight, as it actually lowering the suspension a little bit...this is how I was told to do it by someone with a Typhoon running a similar combo and hitting 1.30 60 fts. but he's got a 4 link in the back. I'll try them looser. I will definitely try the things you mentioned and Arthur mentioned in stages at the track on Saturday. We'll see how it goes. The common thread in all advice has been that I need "some" suspension movement...especially in the rear. I may also trim up those bumpstops in the front to buy a little more travel if need be. I'll put the truck in the air to check the rear travel again...I know I have plenty of shock extension just not a lot of rear compression which should be ok...
Old 03-05-2021 | 04:27 PM
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Thats the speed inc typhoon correct? Jsm makes a kit for the rear with coils that would help alot, mono leafs are for light 2wd cars imo. They also sell double adjustables for the front.
Id agree with everything atomic has said, you want to limit the movement in the front but not stop it completely. Most of your issue is in the rear imo, those soft sidewalls only echo the problem without susp control, but are needed at your power level.
have any sway bars front or rear??
Old 03-06-2021 | 05:36 AM
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My regular cab does the same thing. I'm hoping front limit straps help it out as well.
Old 03-06-2021 | 11:40 AM
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Originally Posted by skolman91
Thats the speed inc typhoon correct? Jsm makes a kit for the rear with coils that would help alot, mono leafs are for light 2wd cars imo. They also sell double adjustables for the front.
Id agree with everything atomic has said, you want to limit the movement in the front but not stop it completely. Most of your issue is in the rear imo, those soft sidewalls only echo the problem without susp control, but are needed at your power level.
have any sway bars front or rear??
Correct, it was originally built by Speed Inc. So much has changed since I've had it that I think only the long block, manifolds and cold side piping are still from them!

This truck has a 12 bolt and JSM told me they don't (and won't) make a 4 link kit for a 12 bolt as there is just no demand. So that's why I went with the Calvert stuff.

No sway bars, It did have the factory front one but I axed it to save the 25 lbs since I was running tight limiters anyway.

I'll test this next weekend on the drag radials I have to see if I can do better with a stiffer tire and looser shock settings as recommended, having an issue with the Hoosiers anyways. I also trimmed up front and rear bump stops yesterday and will try different limiter "tightness" as well.

My mistake was assuming no shock travel was fine based on watching the fast AWD cars out there but everyone I have spoken to or heard from has said other wise - that there is actually some shock movement. There is so little AWD info out there especially at this power level (over 1k whp) and weight (4k lbs). Logic tells me this truck should be close to 2 tenths faster in the 60 ft once I get it figured out.
Old 03-06-2021 | 03:58 PM
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Try it with the sway bars back on. The launch control and better planting of the rear tires will probably more than make up for the weight penalty.



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