SCCA STR 370z Progress Thread.... It can be done!

[SPOHN]

I can clearly see making the rear softer for better grip but tossing the sway? Really?

[03threefiftyz]

Originally Posted by SPOHN

I can clearly see making the rear softer for better grip but tossing the sway? Really?

Yes, nearest garbage can will do.

[martin82]

unless U want a super stiff sway bar in the front and stock bar in rear...
Since my rear spring is too stiff right now, I removed rear sway bar helped a lot. Will be swapping springs soon.

[03threefiftyz]

Also, I think the OP's car is boarding on too stiff for an ST class car. Compliance isn't a bad thing, in fact it will help overall grip. As an FYI, I run close to the same rates on the BSP car, with the front bar not overly stiff and no rear bar.

[AutoX Z]

I'm guessing your car is also at least 100-200 lbs lighter than his is right now for whatever that's worth.

[MIKE_STR]

Originally Posted by 03threefiftyz

If you are trying to increase grip on corner exit....going up in rear spring is not going to help. Do you have a rear sway on the car? If so, yank it and toss it away.

That's the plan and was in one of my prior posts. The car is pretty neutral now in the corners. I do plan on yanking the rear sway completely but realize that I might have to add spring to keep the car neutral.

Originally Posted by 03threefiftyz

Also, I think the OP's car is boarding on too stiff for an ST class car. Compliance isn't a bad thing, in fact it will help overall grip. As an FYI, I run close to the same rates on the BSP car, with the front bar not overly stiff and no rear bar.

These are the same rates that Brian Peters is currently running. I'm not going to argue with the guy that won a national championship in the "wrong car."

However, I'm always open to feedback. You probably have more knowledge when it comes to building a Z for autoX... Than anyone. Keep it coming!

Originally Posted by Apollo8642

Mike_STR, this might have come up, but are you scaling your car?

Yes. 3134 with half a tank of gas... Of course add about 40-50lbs for additional gas that I'll need. However, this was with the heavy mustang wheels on the car... So subtract 32+ lbs for when I'm using the TSW's.

I'll post some target weight info with info on other parts and their weights as well... Soon.

[Apollo8642]

Yes. 3134 with half a tank of gas... Of course add about 40-50lbs for additional gas that I'll need. However, this was with the heavy mustang wheels on the car... So subtract 32+ lbs for when I'm using the TSW's.

I'll post some target weight info with info on other parts and their weights as well... Soon.

Nice, what's your cross weight percentage?
I own longacre scales, but haven't put the 370Z on them yet. It will be interesting to see what you come up with.
I've had my Nismo on a truck stop scale with a full tank, and my fat a$$ in it right when I first got it. It came up at just under 3200lbs, I'm curious if that scale was off, or if the Nismo weighs less then a regular 370Z.

Lets get Peters to comment on what he's run....

[synolimit]

Originally Posted by Apollo8642

Nice, what's your cross weight percentage?
I own longacre scales, but haven't put the 370Z on them yet. It will be interesting to see what you come up with.
I've had my Nismo on a truck stop scale with a full tank, and my fat a$$ in it right when I first got it. It came up at just under 3200lbs, I'm curious if that scale was off, or if the Nismo weighs less then a regular 370Z.

Lets get Peters to comment on what he's run....

That was probably off. 3361 was my weight with just the car brand new with a full tank. Add me its 3521. The nismo should be heavier with the wing, extra bars etc. cars down to 3083 now fully fueled. Still another 86+ to go in a seat, rotors, flywheel etc. I'd like to know cross weight as well.

[SPOHN]

Originally Posted by synolimit

That was probably off. 3361 was my weight with just the car brand new with a full tank. Add me its 3521. The nismo should be heavier with the wing, extra bars etc. cars down to 3083 now fully fueled. Still another 86+ to go in a seat, rotors, flywheel etc. I'd like to know cross weight as well.

That's very doable

[MIKE_STR]

Originally Posted by synolimit

That was probably off. 3361 was my weight with just the car brand new with a full tank. Add me its 3521. The nismo should be heavier with the wing, extra bars etc. cars down to 3083 now fully fueled. Still another 86+ to go in a seat, rotors, flywheel etc. I'd like to know cross weight as well.

Um... How? Please share what you've pulled/ replaced to get there. I've done the math with what I can do legally... I won't get under 3080 with everything done. I was going to get under 3000 until I found out I needed a full tank of gas!

[03threefiftyz]

Last I heard, Peters was running 1000/700 with a small rear bar. Also, the east coast lots tend to be lower grip and bumpier than out west. My car is 2910 or so at battle weight.

[MIKE_STR]

Originally Posted by 03threefiftyz

Last I heard, Peters was running 1000/700 with a small rear bar. Also, the east coast lots tend to be lower grip and bumpier than out west. My car is 2910 or so at battle weight.

I believe he said he is currently at 1050-1100 front and 780 rear. No rear away and he softened his front bar to full soft.

[Apollo8642]

Okay.... I took a break from work, and threw my car on my scales. No leveling, scales on the ground, cords drapped over the car, complete interior, with spare, almost a full tank of gas, my back pack full of detailing supplies, plus two quarts of oil, and who knows what else (I really need to clean my car out). Here's the raw data I got.


Put up or shut up right. lol

[synolimit]

Originally Posted by Apollo8642

Put up or shut up right. lol

Have to protect my word haha sorry OP. Before I said 3083 pounds with a full tank. Today I was 3060 with 6 points on the gas gauge and winter rear wheels. Now my winters on a bathroom scale say 54 lbs, my summers say 47.5 lbs. So subtract 13 lbs. Also empty my washer fluid bottle and you get another 5 lbs loss. With only 6 points I can roughly guess I'm missing 62.5% fuel or 11.875 gallons or 72.44 lbs.

So my car weighs 3114 lbs with a full tank now. Why the difference? Installed the diff pump (5 lbs), 24 row cooler with oil (5 lbs?) hoses ect, and solid subframe bushings which are heavier. But I know those don't add up to 31 lbs. Turns out this new scale where I live only reads in 20 lbs increments. So I could be 51 lbs off or I could be 11 lbs off. Not enough to cry over though. Point is I wasn't lying and I'm putting up.

Now the scale when i showed up today wasn't zeroed so it was reading -2860 lbs.



But I stepped on the scale and I weigh 160 lbs which you can see it went to -2700 lbs so it still reads accurate!



With the car on it reads 200 lbs so it weighed 3060.



With me on the scale it reads 360 lbs (3060 car, 160 me). Hope that proves my word.

[Apollo8642]

MIKE_STR, looks good. Has there any noticeable difference running that GTM oil pan?
Yea if you move out of STR I can't wait to see what your end up doing next. Good Luck

Originally Posted by synolimit

Have to protect my word haha sorry OP.

Try putting it on a real set of scales, and post pics to protect your word. Those scales can be off a hundred plus or minus or even more some times and who knows when they were last calibrated.