Pierce set-up help??

[Dirtwarrior21]

Look for some help on a good starting point for older (square tube) Pierce chassis copy (ride heights, scale percentages, spring rates, and air pressures). I'm running it as a B-Mod/Sportmod with 3-link set-up, any help would be great!!!!

[Dirtwarrior21]

^^^^bump^^^^

[Dirtwarrior21]

Ok, Scaled the car tonight and this is what I got with me in the car........
Cross - 53.3
Left - 53.9
Rear - 58.5
Bite - 150
Total - 2639
Springs
700 LF 700 RF
225 LR 175 RR
Shocks
76 LF 736 RF
93 LR 93 RR

Is this close, or am I way out of the ballpark???

[Dirtrunner35]

ok, where does your rear springs set ? On axle or arms ? With that much rear % I would think the car would be really tight, so maybe back off some cross, I don't like the 736 on the RF and a 93 on the LR. What angles are your rear arms, j- bar or straight bar ? Pull bar have a spring or biscuit ? You might drive the car and it does good, all depends.

[Dirtwarrior21]

Thanks for the reply Dirtrunner..... Springs set in front of the rearend both sides, as far as the bar angles, R-side, both in the bottom holes (looks almost level)...... L-side, back is in bottom hole, and front 1 hole up.....car is running a straight bar (center of pinion and about middle on frame), and the pull bar has a spring (900). Thanks again for the help. was wondering on what your input is on shocks.. (76 RF and 94 LR ?)

[Dirtrunner35]

94 on lr yes, 96 on RF I would not, will make a tighter car on entry, I would use a 753 myself. How does the car handle ?? Have you driven the car ? What tires ?

[Dirtwarrior21]

I only ran the car once at CCS, entry was tight, then when the car would roll over, I would get back on the gas and the front would wash out mid turn, all kinds of bite off the corner. Tire's were 87 RR, 84.5 RF, 84.5 LR, LF 84.5. Gonna rescale tomorrow, switched rear tires to RR 88.5, LR 85.5 and changed the rear spring to 200 instead of 225. Man I really appreciate all the help, I have no clue on this car, just know it seemed tight on entry and mid turn.... Totally different than my SS!!!! Plus I talked to the original owner of the car today. He told me that it is a Razor chassis built by a guy from around Belleville Il. Said it was a Pierce style front and a Rocket style rear and that the guy only made a few... Leave it to me to get a half-breed.....

[Dirtrunner35]

change your right front shock, raise straight bar up a hole on chassis . You took stagger out , that will make a tighter car all over, you might not want that. What kind of tire do you run and what tire pressure ? How long is your straight bar ?

[1Blacksheep]

CCS requires less bite for corner speed. Pierce cars setup really not usable on 3 link other than front ride ht. I would swap the rear springs, keep the short bar angle to a minimum of 3-4 ", 100# bite max with driver,Bottom Bars in the top holes and raise the ride ht in the rear to get 5deg in them if needed.

[Dirtwarrior21]

Rescaled the car with the suggestions y'all made and came up with this.....

LF 582 RF 532 50lbs split
LR 783 RR 709 85lbs split

52.59% Left side
57.27% Rear
50.67% Cross
85lbs bite

If I take 2 rounds out of the right front puts me at 61lbs bite. (%'s basically stay the same give or take .1%)

Changed the bar angles to what was suggested.
88.5 E-Mod (15lbs) on RR 3" offset.
85.5 E-Mod (8lbs) on LR 2" offset. 3" stagger between RR &LR was 2.5"
84.5 E-Mod (10lbs) on LF 2" offset.
84.5 E-Mod (15lbs) on RF 2" offset.
200lbs spring in LR and 175lbs RR.
700lbs straight across in the front

Ride height's are;
LF 6.75 RF 7
LR 7.5 RR 7.75

I do have a 84.5 LR to give me a stagger of 4", but always heard never wanna really go over 3"....

So...... Do these numbers look better????

[Dirtwarrior21]

Ran the car at Fayette County Speedway this weekend, had the same issue after all the changes, (front washes out when on gas mid-turn). Is this because of the 57.27 rear percentage?

[Dirtrunner35]

Ran the car at Fayette County Speedway this weekend, had the same issue after all the changes, (front washes out when on gas mid-turn). Is this because of the 57.27 rear percentage?

washing out ??? you mean a push ?

[Dirtwarrior21]

Ya, it enters the turn fine, but when I start picking back up on the throttle about mid turn, the front pushes straight to the wall. I'm not mashing the throttle, just easing into it. When the track got dry slick, then it seemed as if the car would roll over and rotate around the corner. This is the second time I've driven the car and had the same issue. I dunno if its my driving style or the car setup. I've ran Streetstocks mainly and this is the 1st modified, so maybe its just I have to change my driving style...

[powerslide]

have to ask.... Are you on metric or nova lowers?

[Dirtwarrior21]

Nova lowers