What's best chassis mod?

imo #1 best possible chassis mod in any situation is....

RUBBER

yes that's right.

let me expound.

back in the 80's I remember the corvette style changed. the big deal was it could pull 1G cornering on skidpad tests.

fast forward to 2013. guess what the best cornering production cars do? about 1.05G

rofl

another fact...
you have two cars with antilock brakes. one has 12" rotors. the other has those big BLING job 15" brake rotors with cross drills slots etc and humoungous calipers.

both cars travelling 40mph and lock the brakes. with the same tires on the car they both stop in the same distance. go figure.

however, if you put really good tires on one car, soft compound etc. guess which one stops first? correct. it's the one with the better tires. why is that?

it's the same with cornering. most cars have sufficient handling / suspension geometry for the weight & purpose of the car. improving the handling of the vehicle has way more to do with improving the quality of the tires under the car than putting $999 springs or $999 steering box etc.

if both cars in the above scenario can turn the wheel 10 degrees to the left but one car has better rubber, which one do you think will turn better? ;)

don't believe all the marketing stuff you read.

anyways upgrading your chassis can be a good thing, especially if you have 40year old balljoints that are ready to fall apart, and at the same time you are doing an engine swap etc.

but DONT FORGET THE TIRES

most important part in my opinion