Question of the day

[truckin151]

probably in your 60ft or 330ft time, wheels are spinning. It really sounds about right though, when I was going to the track last year my traps were 91-93mph but I was only hitting in the 14.9-14.8 range.

 

[KGBIGCOUNTRY]

^At times I wish I didnt have a 4x4 till I put it in the sand and go hunting then im happy to have all that extra weight slowing me down. Almost courious what my truck would run if it was as light as a 2 wheel drive and also not extra heavy sprayed line-x in the back.... full powered interior with sun roof also adds up some damn weight....

 

[Off_Road_Teacher]

^At times I wish I didnt have a 4x4 till I put it in the sand and go hunting then im happy to have all that extra weight slowing me down. Almost courious what my truck would run if it was as light as a 2 wheel drive and also not extra heavy sprayed line-x in the back.... full powered interior with sun roof also adds up some damn weight....

Use the 4wd to your advantage when you launch. Otherwise you are running what equates to a really heavy 2wd truck. If you are going to have the extra weight might as well make good use of it.

 

[rocket]

From a physics stand point. Aren't you deviding the power to more wheels. reducing spin, but deminishing torque? When your brain starts to fry move to another thread.

 

[Redtruck-VA]

^At times I wish I didnt have a 4x4 till I put it in the sand and go hunting then im happy to have all that extra weight slowing me down. Almost courious what my truck would run if it was as light as a 2 wheel drive and also not extra heavy sprayed line-x in the back.... full powered interior with sun roof also adds up some damn weight....

I feel wieght is the real advantage Red has. Everything I have done wieght has been in the back of my mind. The only time I've added wieght was when I installed the Laramie power seat. That seat had to wiegh twice what the bench seat I took out. I am sure it is one of the lighter trucks out there being a SXT-Hemi RCSB.

 

[KGBIGCOUNTRY]

Use the 4wd to your advantage when you launch. Otherwise you are running what equates to a really heavy 2wd truck. If you are going to have the extra weight might as well make good use of it.

I do it both ways to see which is working better depending on the day and track conditions. On the 17s the 4x4 hurts the truck by a good amount, on the 20s its the same et with a **** hair slower mph. Its bout a toss up lol. I think im keeping the all terrians on it and gonna run it that way so its already set up for the sand also.

 

[Off_Road_Teacher]

Are you able to get it to hook consistently in 2wd?

 

[KGBIGCOUNTRY]

On the street no unless I got part throttle on launch. The track gets soaked the first 15 feet in hot lap and is normaly sticky but just depends which crew is prepping that day on how dead set its gonna hook.

 

[truckin151]

On test and tune nights my truck will slide all over the place on street tires unless I give it about half throttle and hammer it from there. On club days though, when they actually prep the track right, I can give it more like 3/4 throttle and as the day goes by get a little more aggressive with it depending on how things are going.

And weight isn't all that bad, specially for a RCSB, it just needs to be in the right places. I keep my heavy ass tonneau and tailgate on when runing cause I want the extra weight over the rear tires (its just a smoke show without them on or a really really feathered launch).

 

[Last_in]

I will post up the tires sizes later on, the gears are stock 3.92. I found my slips last night I was trapping 91 on the 17s and 90.2 on the 20s both with 15 flats. I only had 3 track nights on my old setup.... the new one is gonna be a one shot deal. At that mph on those runs I should be trapping mid 14s but cant figure out where the hell that half second is.

This probably isn't going to make that much of a difference in your case, but down below is some calculations.

For example, here is your trap RPM's with different size tires(diameter) on your combo.

This is all based on 91 mph trap.

27" - 4439 rpm
28" - 4280 rpm
29" - 4133 rpm
30" - 3995 rpm
31" - 3866 rpm
32" - 3745 rpm
33" - 3632 rpm

If you ever had it to a dyno, then you could see where it stops making power and what RPM would be best to pass the traps at.