johnc

Roll cage padding is designed to work with a helmet.

Lizard Skin, Dyna Mat, tar sheets, etc. are designed to reduce panel drumming and the noise from water, pebbles, etc. hitting the sheet metal and tire/road noise. Adding more then one layer of any of things just adds weight.

Well... maybe. That gap between the main hoop and the side of the car is not significant in the type of impact you're describing above. Also, the main hoop in a roll bar/cage is designed to protect in a rollover, not side impact. The majority of whatever protection the car can provide will be done by the rocker panel, door assembly, and roof structure. In the type of impact described above you actually want the driver/passenger seat to move inward and have the trans tunnel collapse. New cars even have things called "pushers" designed into the floor pan, rocker panel, and seat mounts to move the entire seat mounting structure inward in a side impact. Trans mounts are also designed to break, forcing the transmission down to give a little more room for the seats to move inward. Roll cage design is very slowly moving away from a totally rigid structure at the outer extremities of the chassis. That type of design imparts too much force too quickly on the occupants. Crush zones are now recognized as important parts of driver protection.

OK. The main hoop needs to be no more then 6" behind the driver's helmet with the driver in a normal, seated position and completely strapped in.

Shocks are adjusted based on spring rate. What springs are on your car and what rate are they?

You don't have to have coil overs or do corner balancing to get a good handling S30. You do have to do that stuff to get a great handing S30.

You can do corner balancing without threaded collars. You just have to move stuff around in the car (battery, etc.), put spacers under or on top of the springs, and other stuff. Its just a helluva lot easier with threaded collars.

If you're having to pump it to get brake line pressure you still need to bleed it. A bad booster would just require more pedal pressure to maintain the same brake line pressure.

Per some FEA analysis done by T Mag about 10 years ago, the strut towers twist and bend inwards. The setup above will do little to nothing to prevent this.

SCCA just issued a technical notice saying that Impact fire suits, gloves, shoes, and underwear manufactured before 2009 are now de-certified for use at Club Racing events. But, they added a line at the bottom saying SCCA is delaying enforcement of the de-certification. As a scrutineer it just confuses the shit out of me - the products are not certified but I'm not supposed to enforce it.

Yes it does. If you just gloss over the important stuff (like alignment) you'll never really know how well these cars can handle.

"Hey Larry, where's my 2.1M check?" "Well, there's the 45% contingency, plus costs. Here's your check for $650,000 and 1099 where we declare all of your $2.1M as income so you gotta pay income tax on that amount."

I've always put a very thin layer of Permatex Copper on both sides of the intake/exhaust gasket on every L6 engine I've assembled.

You're young, so here's a bit of advice you'll eventually learn: Common sense and judgment applies only to your own actions. You cannot apply or expect it from others.

FYI... a member just mentioned that the VLSD diffs have an asymmetric spline with three larger cuts. If so, the side axles I sell will not work.

A race exhaust shop.

What spring rates? What size anti-roll bars? What brand and model tire? What size rims? How much does the car weight? Any corner weight numbers? What are your alignment numbers?

Unfortunately that's not always the case. Manufacturers try to save money in a lot of places and, since 90% of the car drivers don't give a crap, suspensions tend to be marginal in low cost vehicles. Designs from the mid to late 1970s through the early 1980s can be pretty bad due to the oil shocks and recession that occurred during that time period. Engineering budgets at the OEMs were slashed. Ford had the Fox chassis, GM had the X and J bodies, Chrysler had the K car, Nissan had the 310 and the Pulsar, Toyota had the Tercel, Ferrari had the 400, Porsche had the 924,...

The Fox chassis Mustang front suspension sucks. Very poor geometry - it will just make things worse. EDIT: I do know what I'm talking about with regards to the Fox chassis:

You are in the middle of some kind of project around the house - mowing the lawn, putting in a new fence, painting the living room, or whatever. You are hot and sweaty, covered in dirt or paint. You have your old work clothes, T-shirt with a stain from who knows what, shorts with holes, and an old pair of tennis shoes. Right in the middle of this great home improvement project you realize you need to run to Home Depot to get something to help complete the job. Depending on your age you might do the following: In your 20's Stop what you are doing. Shave, take a shower, blow dry your hair, brush your teeth, floss, and put on clean clothes. Check yourself in the mirror and flex. Add a dab of your favorite cologne because you never know, you just might meet some hot chick while standing in the checkout lane. And you went to school with the pretty girl running the register. In your 30's Stop what you are doing, put on clean shorts and shirt. Change shoes. You married the hot chick so no need for much else. Wash your hands and comb your hair. Check yourself in the mirror. Still got it. Add a shot of your favorite cologne to cover the smell. The cute girl running the register is the kid sister to someone you went to school with. In your 40's Stop what you are doing. Put on a sweatshirt that is long enough to cover the hole in the crotch of your shorts. Put on different shoes and a hat. Wash your hands. Your bottle of Brut Cologne is almost empty so you don't want to waste any of it on a trip to Home Depot. Check yourself in the mirror and do more sucking in than flexing. The spicy young thing running the register is your daughter's age and you feel weird thinking she is spicy. In your 50's Stop what you are doing. Put a hat on, wipe the dirt off your hands onto your shirt. Change shoes because you don't want to get dog shit in your new sports car. Check yourself in the mirror and you swear not to wear that shirt anymore because it makes you look fat. The cutie running the register smiles when she sees you coming and you think you still have it. Then you remember the hat you have on is from Buddy's Bait & Beer Bar and it says, 'I Got Worms'. In your 60's Stop what you are doing. No need for a hat anymore. Hose the dog shit off your shoes. The mirror was shattered when you were in your 50's. You hope you have underwear on so nothing hangs out the hole in your pants. The girl running the register may be cute, but you don't have your glasses on so you are not sure. In your 70's Stop what you are doing. Wait to go to Home Depot until the drug store has your prescriptions ready, too. Don't even notice the dog shit on your shoes. The young thing at the register smiles at you because you remind her of her grandfather. In your 80's Stop what you are doing. Start again. Then stop again. Now you remember you needed to go to Home Depot. Go to Wal-Mart instead and wander around trying to think what it is you are looking for. Fart out loud and you think someone called out your name. You went to school with the old lady who greeted you at the front door. In your 90's & beyond What's a home deep hoe? Something for my garden? Where am I? Who am I? Why am I reading this? Did I send it? Did you? Who farted?

Just remember that safety wire is not designed to hold torque. Its there to keep the bolt from backing out.

Well, that's a first. Never before have I heard of anyone comparing a street driven 240Z with a purpose built WRC rally car in a safety discussion. You appear to have already made up your mind and are now just fishing to get someone to give you an "Internet OK" while using a irrelevant example as proof. Good luck with that. EDIT: I know that's sounds bit harsh, but... but... Geez!

The hard line out of the 280Z fuel tank is 8mm. It corresponds nicely to an AN-6 fuel line size.

In general (and there are exceptions), brake caliper/rotor combinations designed for computer controlled ABS equipped cars tend to not be balanced front to rear if the ABS pump and computer are taken out of the system. For your plans the Modern Motorsports PBR or the Arizona Z Car Wilwood brake systems are a better choice.

To repeat...