Re: Nitto drag radials.

[MO <micher@xxxxxxxxxxxxxxx>]

As per the advice , and video ( several years ago) from Mike Craiglow and recent research , seems that what a person does to improve things, has a negative trade off.  Pinion snubbers --If set to prevent "spring wind up", then most likely  it will hit against the floor  in street driving.  Also getting under the car to be able to adjust the snubber , requires a floor jack.  I believe clamping the ends of the leaf springs on the front segment is very effective , and  a pinion snubber is not needed.  Down side is a  stiff street ride.   They should be easy to install and take off  if access to the front segment is  good. 

  In the diagrams showing " spring wrap up"  and the clamps, none of them mention clamping the leaves together on the rear segment. I would think  that would  decrease wrap up even more.  Any reason not to?  I think Mike C. had his rear segment clamped too IIRC...............................MO

On Wednesday, May 31, 2017 at 8:20:23 AM UTC-5, JimJablonski wrote:

I attached a few pics of how the rear lifts when hooking up with a nice set of drag radials.  Note the shape of the leaf spring in the two pics, the first being relaxed during staging, and the 2nd under full load.  So yes, the pinion snubber can certainly smack the bottom of the body (that's it's job) and yes, pinion angle can certainly impact this activity.  As you increase pinion angle for a good hook and launch, the negative trade-off is that it robs HP.  In your case, Mo, you may be correct in thinking your tune might need tweaking, as perhaps previously you had not experienced this load.

On Wednesday, May 31, 2017 at 8:48:46 AM UTC-4, carv...@xxxxxxx wrote:

Hi Steve,

Just guessing here, but maybe it's more an issue of the pinion angle changing due to spring wrap up than suspension travel??

Best regards,

Lyle

On Tuesday, May 30, 2017 at 1:32:12 AM UTC-4, MO wrote:

 Out cruising today , thought I would see how the traction is. Launched at about 3000 RPM , Little to no tire spin, heard a "klunck" i never heard before,( hoping that was the pinion snubber)  and a  bog I have never had with the old low traction tires.  I didn't try it again, but looks like the Holley is going to need some tuning.   No tire spin on a second gear 4500 RPM shift.  I am impressed with these tires..........................MO

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