Installed No Flex Frame Stiffener Bar System - Page 3 - ZR-1 Net Registry Forums

Tyler Townsley · 12-03-2013

I really think these should have been a part of the ZR-1 package. The motor has so much HP that hammering the throttle twists the frame and causes the positraction to react further amplifying the problem. I believe this sets in motion a back and forth momentum in the chassis that prevents low speed hookup. Once the car finally dampens this motion it then can really start to roll. JMHO,

Tyler

efnfast · 12-03-2013

Quote:

Originally Posted by Tyler Townsley

I really think these should have been a part of the ZR-1 package. The motor has so much HP that hammering the throttle twists the frame and causes the positraction to react further amplifying the problem. I believe this sets in motion a back and forth momentum in the chassis that prevents low speed hookup. Once the car finally dampens this motion it then can really start to roll. JMHO,

Tyler

Yup, just experianced that. In first gear, it was hop hop hop, chirp chirp chirp. Think these would help that?

Dynomite · 12-03-2013

Quote:

Originally Posted by efnfast

Yup, just experianced that. In first gear, it was hop hop hop, chirp chirp chirp. Think these would help that?

Old hard rubber tires .......hop hop hop, chirp chirp chirp

Maybe time for some new rubber

Discount Tire

FRONT.................................................. ....................REAR
Nitto NT 555 Extreme Performance..................................Nitto NT 555R Drag Radial
P275/40ZR-17 98W.................................................. ...315/35R-17 102V B

.................................................

efnfast · 12-03-2013

Fairly new rubber, two years old, but new found power. Ported plenum and IH.

Tyler Townsley · 12-03-2013

Quote:

Originally Posted by efnfast

Yup, just experianced that. In first gear, it was hop hop hop, chirp chirp chirp. Think these would help that?

Yes.

Tyler

XfireZ51 · 12-03-2013

Quote:

Originally Posted by Tyler Townsley

Yes.

Tyler

Tyler,

So you think these would help the ZR "bite" better at the track? And w more power, getting it to the ground gets more problematic. Is that why the ZR appears to accelerate stronger in the second half of the 1/4?

Tyler Townsley · 12-06-2013

Quote:

Originally Posted by XfireZ51

Tyler,

So you think these would help the ZR "bite" better at the track? And w more power, getting it to the ground gets more problematic. Is that why the ZR appears to accelerate stronger in the second half of the 1/4?

Just using 60 ft times you can see there is something going on, the only car I know of that solved that was Fastlane and he went with a Ford 9 inch which would resist the torqueing better. The only other solution would be a computer controlled traction control and even then I think the flex would still be a problem.

Tyler

aafc · 12-08-2013

Jeff,
With your black ZR-1 the mounting bolts show up. You could just paint them
black ,or install 49th street rockers to hide the front and rear mounting bolts.
I drag race my Zr-1 and my 60ft. times avg. 1.73 to 1.78 , 1/4 mile times
avg 11.65 to 11.72 @ 118- 120 mph. I might have to look into frame stiffener
bar system.
John Becker
1990 white/black # 2546
one of a few auto (4l80E ) eq. ZR-1's

-=Jeff=- · 12-08-2013

Yeah, I have the rockers waiting to get painted

aafc · 12-26-2013

I ordered the no flex frame stiffener for my 1990 auto eq. zr-1 on Dec.
17. 2013. installation was completed on the 21 of Dec on a 4 post lift.It took
a little longer then what the instructions said. Front brackets took about
20 mins to install. The rear brackets took a bit longer because i have DRM
c4 trailing arm brackets installed. the lower dog leg had to be moved to gain
access to the lower trailing arm bracket bolt.
After installing the rear frame stiffener bracket and bolt, torque the assembly
to 80 lbs. The lower dog leg was reinstalled and ride height checked.
Without adjusting the frame stiffener i jacked up the car at the right front
(about 5in off the ground) i could not open the doors. lowered the car tighten
the frame stiffener bars and raised the right front again, i could open the door.
Took the z for a ride Sunday the 22nd, car felt more stable without body
flex.
I drag race my z and have pulled 60ft times of 1.73 to 1.79 running 11.69
to 11.76 @ 117-119 mph. Next test and tune will be Jan 4, 2014, I'll
you know how this works out.

Merry Christmas
John Becker

member #0115

12-03-2013	#21
Tyler Townsley Join Date: May 2005 Location: Nichols, FL Posts: 615	Re: Installed No Flex Frame Stiffener Bar System I really think these should have been a part of the ZR-1 package. The motor has so much HP that hammering the throttle twists the frame and causes the positraction to react further amplifying the problem. I believe this sets in motion a back and forth momentum in the chassis that prevents low speed hookup. Once the car finally dampens this motion it then can really start to roll. JMHO, Tyler __________________ 55 Polo White (Project) 61 Jewel Blue (Sold to buy above) 66 Nassau Blue 68 Torch Red 88 ZR1 Blue 90 ZR1 White

12-03-2013	#24
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,492	Re: Installed No Flex Frame Stiffener Bar System Fairly new rubber, two years old, but new found power. Ported plenum and IH.

12-08-2013	#28
aafc Join Date: Feb 2010 Location: Ochlocknee, GA Posts: 435	Re: Installed No Flex Frame Stiffener Bar System Jeff, With your black ZR-1 the mounting bolts show up. You could just paint them black ,or install 49th street rockers to hide the front and rear mounting bolts. I drag race my Zr-1 and my 60ft. times avg. 1.73 to 1.78 , 1/4 mile times avg 11.65 to 11.72 @ 118- 120 mph. I might have to look into frame stiffener bar system. John Becker 1990 white/black # 2546 one of a few auto (4l80E ) eq. ZR-1's

12-08-2013	#29
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: Installed No Flex Frame Stiffener Bar System Yeah, I have the rockers waiting to get painted __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

12-26-2013	#30
aafc Join Date: Feb 2010 Location: Ochlocknee, GA Posts: 435	Re: Installed No Flex Frame Stiffener Bar System I ordered the no flex frame stiffener for my 1990 auto eq. zr-1 on Dec. 17. 2013. installation was completed on the 21 of Dec on a 4 post lift.It took a little longer then what the instructions said. Front brackets took about 20 mins to install. The rear brackets took a bit longer because i have DRM c4 trailing arm brackets installed. the lower dog leg had to be moved to gain access to the lower trailing arm bracket bolt. After installing the rear frame stiffener bracket and bolt, torque the assembly to 80 lbs. The lower dog leg was reinstalled and ride height checked. Without adjusting the frame stiffener i jacked up the car at the right front (about 5in off the ground) i could not open the doors. lowered the car tighten the frame stiffener bars and raised the right front again, i could open the door. Took the z for a ride Sunday the 22nd, car felt more stable without body flex. I drag race my z and have pulled 60ft times of 1.73 to 1.79 running 11.69 to 11.76 @ 117-119 mph. Next test and tune will be Jan 4, 2014, I'll you know how this works out. Merry Christmas John Becker member #0115