Halltech

StealthTitanium.

Halltech

Jimmy Painter. Some time ago you posted a type of washer that holds the bolt to the washer better.

Our titanium washers on the hood have a tendency to walk when you tighten them.

Do you have the name of those?

can't find the post.

This is the washer:

Z06Fix

Most likely talking about nord-lock washers.

http://www.nord-lock.com/

Painrace

Nord Lock! I use them for everything, Rear axle nuts, brake bolts, etc. They beat the hell out of drilling the heads and wire tying.

Jim

Everett Ogilvie

Me too Jim. I removed one axle and did the CV joint boots and put it back together with NordLocks rather than safety wire. When the other side comes apart it will get NordLocks as well.

Halltech

Thank you soooo much.

Jim

Halltech

Just removed 3lbs of plastic. Hummm; what am i up to now?

Question: Does anyone know when and if GM changed the rear brake duct bezel with more of a flange to help with rock chips?

Also: -38.5 grams of rocks from the wheel liners.

Katech_Zach

Yes, they did.

WhiteDiamond

Do you know when this change was made?

Z06Ronald

I had the same question. And can they be retrofitted?

Katech_Zach

Not exactly. Maybe one of the GM parts sponsors can chime in.

Yes.

Halltech

2008

WhiteDiamond

Thank you both!!

Halltech

Today I swapped out our Pirelli P-Zero Rossos for the new ZR1 meats Pilot sport cups.

I was ecstatic when I weighed the 335 rear and found out it weighed 31.8 lbs. Why ecstatic? A brand new 345 NRF Pirelli weighs 35.55 lbs (I have a new one in stock) so I figured goodbye 3.75 lbs of unsprung weight per rear wheel, right?

Wrong. The old tire on the ULZ rim weighed 59.35lbs and the new Pilot SC exactly 59.35 lbs. No difference. Humm. Then I remembered all the tire spin over the past year and that explained it. The old tire now weighs 30 lbs vs. the 35.55lb new weight. Over 5 lbs lost on the road per tire.
The tread width is 13.5 on the Pilots, 13 on the Pirellis. Even though they are 335s vs. 345s. Once they are "worn", I will see the extra weight go bye bye.



Neutral weight loss in the rear except for 1.32 lbs of sound dampening total. Each side has a bag of "stuff" stuffed in behind the wheel well that does nothing but eliminate some road noise.


Then there is the 39 grams of rocks per side:



Why am I ripping up this area? I will reveal this at the Autobahn.

Fronts go on tomorrow, but the weight of a front is 47.15 lbs worn, down from 48.35 lbs new. The fronts were 275s, now we have 285s and have gained a lb per wheel.



Pilot front:


The tires are now run flats vs. non run flats; the traction will be improved. Skating at 70 mph is nuts in second gear.

MTPZ06

You were "ecstatic" for an additional -0.2 lbs? You really are taking this very serious.

Halltech

You read too fast. I typed too fast. Re-read the post. 3.75lbs per wheel would have been the case comparing a new PSC to the Pirelli P-Zero. 7 lbs of unsprung weight!

When I weighed the worn tire/rim, it had lost the 3.75lbs over 1 year of spinning.

Now had I had the tires shaved, they would have been effectively 1 year old, and weighed anywhere from 3 to 4 lbs lighter.

el es tu

Jim are you going to do the tar sheeting removal? There's a good bit in those rear fender wells (and it wraps around back behind the rear bumper) and there should be some on top of the center console. Then there is the sound deadening matting that's glued behind the carpeting... You could still keep the carpets but just remove that sound deadening/backing stuff for a nice unseen weight loss.

Halltech

The foam around the wheel well? Not much there. Maybe .25lbs. I drove today with the tubs out, while our project is working. Tiny rocks could be heard hitting the inner body. Not a pretty sound.

Once the tubs are back in things will get back to normal.

I am sick though. Added 3 lbs on both front wheels. The Pirellis were 275s vs the PSC 285s and worn to 48lbs with the rim. The PSCs are 51 lbs.

They stick like glue. Still no first gear, but if I do not hit 2nd hard, there is actually traction now. Except for the front weight gain, I love em!

el es tu

I removed the foam, but what I was referring to was the tar sheet sound deadening on the frame as well. There should be two pieces per side: one near the bags and then one (if I remember correctly) toward the back that wraps around the gray inner fenderwell all the way behind the bumper). This felt like it weighed significantly more than the bags and wheel well foam combined. However it is a pain in the *** to remove - lots of solvent is necessary to remove all the glue that's left behind.

No excessive noise with this mod

24hr Z06

The plastic bag tubes?

Can you take a picture of what is inside?