How far "off" can a chassis be?

[PGSigns]

Go and read this entire thread and look at the way the chassis and cage was done. Pay close attention to the shape of the bars in the cab and the way they tie to both the front and the back of the chassis. They are done very well and serve 2 purposes. First to give strength to the entire chassis to be able to make it work as it should. You are looking for low 9 second passes on the motor and it takes a good chassis to do that. Second it is there to save your ass if something bad happens. I have wrecked an 8 second car right as it shifted into high gear and hit both walls. It was in a car I built and it held up fine around me. Not so good in the front. There is science, skill and rules that all need to come together to make a racecar (and that is what you are after) go straight, stop straight and save your butt if asked to and what you have along with a few welding lessons is not going to get there.
Jimmy

[vin63]

Originally Posted by team39763

...Why wouldn't the design work out well? I thought the x was stronger than straight bars?

Read the section (4-11) on roll cage requirements very carefully, so that you don't run into any issues after the fact (particularly the illustrations that note the tubing requirements and for the main hoop support bars). There is also a section specifically on pick up trucks, that I've brought up on this forum whenever someone asks about eliminating the rearward bars from the main hoop.

http://www.nhra.com/UserFiles/file/G...egulations.pdf

[ptc]

Originally Posted by vin63

Read the section (4-11) on roll cage requirements very carefully, so that you don't run into any issues after the fact (particularly the illustrations that note the tubing requirements and for the main hoop support bars). There is also a section specifically on pick up trucks, that I've brought up on this forum whenever someone asks about eliminating the rearward bars from the main hoop.

http://www.nhra.com/UserFiles/file/G...egulations.pdf

X2 - READ THE RULES before you do work.... otherwise you are just wasting your time and money. The guy that did your rear bars obviously did not know any certification rules, because its ALL wrong.

JMO - The chassis is your whole "FOUNDATION" for everything else that goes on the vehicle. Just like a house being built..... if it aint right then NOTHING will be right.

If your frame is bent to begin with you need to have it put on a frame machine and get it right first before you do anything else.


Good luck