On a good note took my junk to a mopar show at an 1/8 mile track. Got one good pass out of 8, that netted me a [Email]7.21@95.24[/Email] FWIW, that corrects to a [Email]11.34@118[/Email] which is only .01 slower than my best time last fall. The air yesterday was 2500 plus DA, my 11.33 passes were at 400 DA last November. So the E85 seems to have made a tick of improvement, about what I was hoping for. Maybe low-mid 20s in this fall?

Now, for the bad part. I cant get a hook with this thing..period. Last fall I tried the cal trac bars in the lower hole with with 1/4 turn pre load on drivers side, 3/8 turn on passenger side, shocks (Rancho 9 ways) on 7-9. I had about 4.5 inches of travel last fall. Hook was very inconsistent with a best 60 of 1.60.

Over the winter I swapped rear sections of the monoleaf springs to lower the rear to help with transfer.

I now have 5.25 inches of front travel

Yesterday I had the bars in the upper holes with .100 or so of air gap on the drivers side, passenger side just touching. Tried the shocks on 5, spun pretty bad. 60s were as slow as 1.90s, even one pass in the 2.00s. This was leaving off of idle.

Leaving at 1500 or so, I did manage to get another 1.60 60 out of it. I dont have video, but the track photo shows a little bit of sunlight under the left front and good weight transfer.

Overall if I leave at idle it spins, seems like it will transfer weight, but spins anyway. Leave a little higher and it will not spin as bad, but sometimes it transfers, sometimes not.

Full rundown is a 72 RR, 5k flash converter, 4.30 gears, 275/60/15 ET street radials, calvert front shocks, SB torsion bars.

In the driveway or on the street if I blip the throttle the front end comes up pretty quick, I dont think my problem is in the front,(but I honestly have no idea) all in the back.


Any help would be appreciated

Here is a pic taken by the track photographer.

Maybe it will help??

I have no idea which pass this was, but judging from the front end rise, most likely I left from idle and then it spun.

http://www.cxpressphotography.com/asccus...avParent=126610

How much air pressure are you running? How is everyone else hooking at the track?
What I am trying to say, your tires are not very wide, and combine that with a marginal track. You setup might be close to idea.
I am just not familiar with those tries, whats the section width?

I have seen cars that leave from idle(on a narrow tire)
would spin and yet if they up the rpm they would hook,
I have the same issue on mine.... I call it slapping
the converter and it up sets the tires... try even higher
rpm. Its hard to say what your chassis needs without
a video... you can learn tons from a video in slow-mo

How old are your tires? How much tread is left on them? What air pressure do you run?

IMO your tires aren't that small for what you are running.

Try experimenting with launch RPM. Start at 2000 and go up from there in 200 RPM increments.

Did you check to make sure that you have enough shock travel? (extension)

If you have enough shock travel, try experimenting with shock stiffness settings. Go stiffer first and see what happens.

Paul

Von I had an 1/8" air gap in my bars at MoKan. I believe mine was spinning about 1 or 2 turns and then hooking. I'm going to try some preload next time out. Was there a good turnout Saturday? Jim

I'd go bottom holes and 1 turn pre load with driver in seat. then all the rpm things torqing it can load the suspension thus not flashing out of it's shoes?

I think you need a new baseline from which to start tuning. I'll offer mine, since it was working very consistently on the same size tires:
- Pinion angle 3.5 degrees
- Link bar in lower hole
- 1/4 turn preload on driver side; 1/3 additional turn preload on passenger side (measured w/ me in the driver's seat)
- Rear shocks on middle extension setting
- Front shocks on lightest extension setting (if adjustable)
- Rear tires 17.5 psi on 8" rims
- Launch from 1700 rpm (gets it above idle, but not so high that the chassis starts to torque up)

Good luck!