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Author Topic:   Wrap-up shock question
jbenn
Member
posted September 27, 2001 06:55 AM
I have an IMCA 4-link car that runs on a 1/4 mile dirt track. I want to know the effects of completely removing my 90/10 wrap-up shock. Has anyone else removed theirs? How did it affect your car? Did it set down too violently? Also I run a long AFCO torque link if that helps (35"). All help is greatly appreciated.


jammin
Administrator
posted September 30, 2001 09:38 AM
When your rear end rotates upward and is under strain with spring pressure, if you don't use a 90/10, it will slam down, very, very hard. This could be very dangerous, especially if your running a lift bar and it breaks. I would not recommend it.

jammin


tmtrigg4
Member
posted September 30, 2001 05:03 PM
Thank you to everyone that replied. I wished that I had heard from you before last night. The strangest thing happened. I pulled the 90/10 off and I did lose the driveshaft. However, it appeared that it was more from wrap-up under acceleration than from drastic negative pinion angle under braking. The front yoke somehow traveled completely into the transmission and jammed to where it didn't come back out. Afco torque link with 850# spring traveled 4". Until I pulled wrap-up shock off it had only traveled 2". With the front yoke stuck in the trans when the car set down the u-joints bound up and snapped the u-bolts. I had to take the front yoke out of trans. with a hammer; however, another one slides in and out with ease. What is everyones opinion as to what happened? The straightaway before this happened my car was hit in the right rear and went airborne. Do you think that couldve caused it? The car went a half lap more and the driveshaft came out. I need help and appreciate all who reply.
Thanks,
Jbenn


tmtrigg4
Member
posted September 30, 2001 09:58 PM
The car is way too tight entering the corner. I was hoping that pulling the 90/10 off would loosen it up. Will too much cross weight make it too tight going in? Ive got a lot with a lot of bite. 60.5 cross 325# bite. my RR ride height is too low also. It will definitely be fast if I can get it to turn going in without sacrificing forward bite.


dirtslinger66
Member
posted October 01, 2001 12:12 AM
THAT WILL MAKE IT VERY TIGHT WE RUN 51% CROSS AND 80# OF BITE WITH A Z LINK



jbenn
Member
posted October 01, 2001 10:44 AM
tmtrigg, check your private messages. I'd like to discuss some setup ideas and questions with you since we appear to be somewhat on the same page.


jammin
Administrator
posted October 01, 2001 11:01 PM
Antisquat can come from different parts of the car. It isn't always what you see that gets you the bite. Depends where it is coming from.

jammin


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