LMM: Suspension Help

[moneypitt]

I need some advice on my suspension, I have been getting to the track with my 09 and have it down to a 13.00@101mph. The truck will break loose at the line over about 10psi of boost depending on track conditions, I am considering Caltracs and or adjustable shocks. Would this help the truck hook up at higher boost levels, or should I bite the bullet and look at a set of drag radials? How much more can I hope for over a 1.7 60'?

 

[BLKLMM]

Caltracs and some Qa1s or Ranchos all around will help....use search button plenty of Info here:thumb:

 

[moneypitt]

Caltracs and some Qa1s or Ranchos all around will help....use search button plenty of Info here:thumb:

Ok I know they will help some but what I am asking the more experienced racers is, what is the most I can expect on my 60' times with a stock motor? If I am about at the limit already it is not worth spending the money untill I upgrade the motor for more hp. I do use the search for every question I have before posting.

 

[OregonDMAX]

What is your tire pressure launching

 

[Cknight199]

Lowering your RT will help you get a 12.xx as long as they are counting it against your time

 

[moneypitt]

What is your tire pressure launching

I have been trying 28-32, the best run was at 32 this last trip down to the track. This is on stock size Michelin MS2's that will be slicks before too long

 

[moneypitt]

Lowering your RT will help you get a 12.xx as long as they are counting it against your time

The wife needs to work on that, I could do some weight reduction if it comes to that. Race weight is 7140lbs with a 1/4 tank of fuel.

 

[SickLL7Crenshaw]

Lowering your RT will help you get a 12.xx as long as they are counting it against your time

RT has nothing to do with ET.

 

[Cknight199]

RT has nothing to do with ET.

Doesn't that depend on if your actually racing (like bracket racing)

 

[Harbin_22]

Doesn't that depend on if your actually racing (like bracket racing)

No your ET will no change from RT but if you both dial a 13.0 and both run a 13.0 the person with the better reaction time is going to win

 

[jacobdewey]

Are you clamping your overloads now? I used caltracs, and gained about a .05 on my 60'. I then put in a straight centerlink and cut off .10 off my 60'. My best 60' was a 1.68. That was also on Nitto 420s @ 28psi rear and 30psi front. I know guys have cut 1.5's on the setup I just stated. Track prep makes a huge difference too.

 

[LWATSON]

The best I ever did on street tires was a 1.71 60'. With drag radials I am consistently in the mid 1.6's with and occasional 1.6 flat. Also have track bars, sleeves and braces.

 

[Cknight199]

No your ET will no change from RT but if you both dial a 13.0 and both run a 13.0 the person with the better reaction time is going to win

But say I dial in a 13.0 and have a .1 rt and someone else dials in a 13.0 and has a .5 rt wouldn't he run a 13.5 and I run a 13.1?

 

[Ne-max]

What tires are you running now? Do you have your front lowered? Tires are a big factor. I would clamp the springs and try that. 1.70s is pretty decent for nothing done yet in my opinion

 

[moneypitt]

Are you clamping your overloads now? I used caltracs, and gained about a .05 on my 60'. I then put in a straight centerlink and cut off .10 off my 60'. My best 60' was a 1.68. That was also on Nitto 420s @ 28psi rear and 30psi front. I know guys have cut 1.5's on the setup I just stated. Track prep makes a huge difference too.

No, stock suspension except for HD tie rods and a DHD center link brace
.

 

[CaptPhil]

I cut consistent 1.69 60ft on nitto terra grapplers, with a best of 1.66. This is with stock shocks, a dhd brace and sleeves. 28 psi front and rear.

 

[Hot COCOAL]

I need some advice on my suspension, I have been getting to the track with my 09 and have it down to a 13.00@101mph. The truck will break loose at the line over about 10psi of boost depending on track conditions, I am considering Caltracs and or adjustable shocks. Would this help the truck hook up at higher boost levels, or should I bite the bullet and look at a set of drag radials? How much more can I hope for over a 1.7 60'?

same dilemmas to consider for you and everyone else....
cal tracs, shocks, slicks, experience- go from there

Caltracs and some Qa1s or Ranchos all around will help....use search button plenty of Info here:thumb:

listen to this guy

Ok I know they will help some but what I am asking the more experienced racers is, what is the most I can expect on my 60' times with a stock motor? If I am about at the limit already it is not worth spending the money untill I upgrade the motor for more hp. I do use the search for every question I have before posting.

Bro, BLKLMM "IS" an experienced racer

The wife needs to work on that, I could do some weight reduction if it comes to that. Race weight is 7140lbs with a 1/4 tank of fuel.

your wife is the driver? what is she saying the truck feels like off the line?
how are your T-bars set, what's the toe setting at when you're at the track? how is the truck tuned, what mods have you done (turbo, injectors, ifs stuff etc) what are you doing to ward off weight transfer/lifting the front? have you tried a "soft launch"

lots of variables to look at, for something every duramax that hits the strip deals with.

 

[moneypitt]

What tires are you running now? Do you have your front lowered? Tires are a big factor. I would clamp the springs and try that. 1.70s is pretty decent for nothing done yet in my opinion

Stock 17" Michelin MS2's are what are on it now, I lower the front end all the way down when we race. Ok I could give that a shot.

 

[Ne-max]

I raced mine yesterday. My firestone all terrain 10ply tires did not like anything over 8psi of boost. Had them down to 30 psi. Had no hop at all and was smooth out of the hole. Pretty sure they was keeping me from getting better 60ft times. Way to hard of tire for the track in my opinion

 

[moneypitt]

same dilemmas to consider for you and everyone else....
cal tracs, shocks, slicks, experience- go from there


listen to this guy



Bro, BLKLMM "IS" an experienced racer


I was not implying he is not, no offence intended. I was just saying I was looking for advice on my set up that I could not find with search and was trying to ask the experienced racers instead. I guess it did not come across that way.

your wife is the driver? what is she saying the truck feels like off the line?
how are your T-bars set, what's the toe setting at when you're at the track? how is the truck tuned, what mods have you done (turbo, injectors etc) what are you doing to ward off weight transfer/lifting the front? have you tried a "soft launch"

Yes she is bracket racing our truck, at about 10psi of boost it digs and has great traction. Over that depending on track conditions it will spin and start hopping killing her time. I lower the front end is all the way down at the track, toe setting?

The truck is tuned with Robs 230hp max effort on a stock motor w/lift pump, new down pipe and 4" exhaust. Don't know about weight transfer but the front does not seem to be lifting much when the truck is launched
.
lots of variables to look at, for something every duramax that hits the strip deals with.

Are you kidding a woman doing a soft launch:roflmao: