I run a local street car shoot out deal when I can at my local track. My Dart has 325 M/T drag radials and with no prep I have trouble getting ahold of the track so I'm considering a pair of Hoosier 28- 14.5 QTP's. The car has Viking d/a adjustable shocks front and rear. What shock adjustments would I need to make going from radial to bias?

Thanks, Justin

my understanding is they are almost opposite .
IE : radial loose extension , tighter compression . Rag tyre tighter extension and less compression . You need to hit the radial harder and hold it there .
BUT
I only run radials , so what do I know
My Vikings are 10 clicks clockwise compression and 5 clicks clockwise extension . They are also valved to suit radials . Rear . I have single adjust QA1 on font at full loose .

Tex

On the front I would loosen up the extension and stiffen it up midway on the compression, rebound.
On the rear I would split the extension halfway and same on the compression and go from there
If we knew the weight, HP and body style we might be able to get you closer

You have to smack a radial hard and hold it down. loosen rebound, tighten compression as the track is poorer. It also likes a higher and shorter instant center. Loosening the front possibly help if traction is very poor. However radials on no prep is tough, Bias ply much better.
Doug

Thanks guys.

Cab my car is a 69 Dart, pump gas small block, 727, 3350#, cal tracs and monos. It's ran 6.40 almost 109 in the 1/8.

On a average track with a 275 radial,@3550 1.37 s 112@6.0 set up was front 3 from full loose ex and 3 from tight comp with max front end travel, and rear halfway on comp and 3 to 4 from full loose if the frack is good you can tighten it up but if its crap stay loose tyre pressure was 17 cold

Radials - aggressive suspension, separation, loose rebound, tight bump. Quite different from slicks. Hard to find a tune that will work for both with just a shock change, but, if I were trying, I would make the baseline aggressive and put a good shock on it be able to control it either way.