What we had in spring rate is of no use for U, because U have to go from U´r truck and its weight, stance, height, tire height, HP lvl, preload on bars and so on.
So U have to do the messuring and math Ur self, plot out the center of gravity (CG) and then find neutral line (100%anti squat) then find Ur Instant center (IC) THEN u can start tweekin the points, weight the car and do the talk and rekomendation from spring manufactors.
Then do the test and competition, closely watching Ur trucks behavior, THEN deside if U have to do changes?, then figure out WHAT to change and WHY..
Recomend U to start on Swedish STRONG coffe the cafein is a rocket to sience clouds
Look at it this way, Doc Hoover, Ed Hess and Robert´s engine is puting out similar Hp The aproach to get these nrs is however a lithle different, despite that they almost goes same ET, and
MAYBE Doc and Ed could compare chassie settings because there trucks behave similar, But Neither of them would benefit from puting on the settings used on Roberts truck because of differents in stans, converter, weight (not only total weight, also invidual corner wt and front/rear is needed) Tq curve, tire dimensions CG, IC etc
I recomend U to buy the book "Door slammers, the chassibook".. by Dave Morgan, and IF he ever does a seminar again, ATTEND ON IT, U learn alot and can make Ur own teekin on Ur car by Urself
Why we did a change in -07 on spring rate and chocks?? because the curent spring rate could´nt withstand the power output so the chocks and springs bent to banana form..
From the first 8 sec run there have been a substancial develop on the truck in engine and some other parts MAINLY change of heads from 23`to 18´heads and a uppgrade in turbo etc BUT the power output aint that big as U think, the engine put down serius power as it was, we think the upgrades got us about 100- 150 Hp, if ever so much?
The tire is not unloading (suspension is doing its work, the tire is loosing grip) because of bad trackprepp only, we even figured out that the tires are to old and lost the ability to hook as whell as expected, and yes the fenomen occurs about 100 feet out when we stepp up on boost on 2 gear, and thats why we think were gona go 8,5, because we havent got it up to full boost yet
Hope U understand WHY I dont give out info about things only aplyably on Roberts truck? It would probably screw up Ur mind and may get U out the wrong way..