Frame brace/ supports ?

[rb25drag]

Alright guys Im looking to get the flex out of my 240. To me its scary b/c I can jack the front end of the car up and my drivers door hits on the bottom when shutting it. Also when I let the car down off the jack I can see 1/2 inch of body flex just by stairing at the firewall. What is offered for this fix?

Does the Fender braces take this flex away?

I do drag and im putting ALOT more power in this year. Im afraid of a wheelstand that results in a totaled car. Bracing is a must and I need to know what you guys are doing to prevent this. Thanks

[positron1]

I also noticed that whenever I would jack the car up and it was annoying to say the least. I put on a set of fender braces and strut tower braces and that really helped get rid of that problem. S13 Fender Brace Install zerothread?id=255621I tried to find 94_240's Nagissa Shock Tower Plate install but I couldn't find it.

[rb25drag]

Ya I seen that thread. I think I can fabricate those easy and save some money. Also I think I can make the power brace in the front. But I wonder how all that is going to play when I get a hard launch and a possible 3 foot wheelstand drop? Im afraid of screwing the entire front end when it happens.

So since you insalled the fender braces that took all the flex out of the front end past the strut towers and firewall?

[evildky]

uh...where are you placing the jack? unibody cars can be difficult to jack, I'd recomend placing the jack under the crossmsmber as this distributes the load to the mid section of the lower fraom rails where it' intended to encounter severe loads, you shoud never place a jack forward of the crossmsmber or rear of the diff, if you are serious abour stiffenitn then strip the shell bare and staart stitch welding, and if you are packing tires then you must be turning a 10 second quartermile and therefore you must have an NHRA lega cage which ties into the dront and rear shock towers, so clearly someone cut the tube on your cage, you want still nothing stiffens like a cage

[94_240sx]

I tried to find 94_240's Nagissa Shock Tower Plate install but I couldn't find it.

Here you go.zerothread?id=285329

My doors close just fine no matter where I jack up. Overall, it's stiff, but not while I'm driving. I think I've installed every bracing part that I can think of and put my hands on except fender bracing since mine already has from the factory. I love how it handles now!!!

[rb25drag]

uh...where are you placing the jack? unibody cars can be difficult to jack, I'd recomend placing the jack under the crossmsmber as this distributes the load to the mid section of the lower fraom rails where it' intended to encounter severe loads, you shoud never place a jack forward of the crossmsmber or rear of the diff, if you are serious abour stiffenitn then strip the shell bare and staart stitch welding, and if you are packing tires then you must be turning a 10 second quartermile and therefore you must have an NHRA lega cage which ties into the dront and rear shock towers, so clearly someone cut the tube on your cage, you want still nothing stiffens like a cage

I do jack from the crossmember.

Rollcage is going in a few weeks. 10-12 point not sure which yet. Welded in! Not bolted.

I do run low 11's and this year I will be in the low 10's 1/4 mile

Also it does not have to be NHRA legal until you hit 9's so 10.0's Im good. 9.999 Ill have someone smack me on my hand.

Stitch welding I understand will be the best way, But I think there is other ways to get around that.

[Slappy]

I can jack the front end of the car up and my drivers door hits on the bottom when shutting it.

One thing that will help with that is Fender Braces , since the fire wall area is a very weak part on our cars. Also , shock tower braces. And if you have a S14....

Frame Rail Braces

http://www.topspeedauto.com/Templates/AboutUs.htm

Pics

http://img.photobucket.com/alb...1.jpg

http://img.photobucket.com/alb...2.jpg

http://img.photobucket.com/alb...3.jpg

The front fender brace installs inside the fender to reduce chassis flex between the front section of the car and the mid/rear section of the car. This reinforces the chassis structure where it is weakest - about the firewall, between the cockpit and the engine bay.

http://www.splparts.com/main4/main/default.htm

There are cheaper ones on Ebay that do the exact same thing.

Improved brake response and stability is gained by adding the Shakitto Plate! This is a completely brand new product by Nagisa Auto that helps reduce the load on the shock towers, especially during heavy braking. Drastic improvements are achieved without needing to modify or weld the frame with obtrusive support bars. Bolts onto factory locations, and can complements a tower brace setup.

http://www.more-japan.com/Nagi....html

But yea , a properly welded cage will do it.

[rb25drag]

Its a 1990 s13 chassis.

I have made front strut supports:



But I think those Nagisa Auto Shakitto Plates would help alot! Along with the fender braces. Im thinkin that just might be the fix.

[Slappy]

Heres some more goodies from my site.

http://forums.driftinginsider....t=520

[evildky]

why not trriangulate your towers to the firewwall? and wht not tie them into the lower rails above the tc rod mount point, you think the s13 is flmsy try an S30

[rb25drag]

why not trriangulate your towers to the firewwall? and wht not tie them into the lower rails above the tc rod mount point, you think the s13 is flmsy try an S30

Ya I was kinda thinking the same thing. Wouldn't it be easier and cheaper to just tie in 2 more bars from the strut tower bar to the firewall and it do the exact same thing as the Nagisa Auto Shakitto Plates?

If there is a car any more flmsy than the s13. I def would not be putting any power to it and def not racing it. Im already worried about twisting it.

[scole]

Chassis stiffening foam?

I guess I cannot post a link to another 240 forum.

But anyway, it was about filling the frame rails, all the pillars, rocker panels, etc. with a medium density expanding closed cell foam. It looks fairly simple to do with noticeable gains in overall chassis stiffness.
Modified by scole at 1:59 PM 3/12/2008

[rb25drag]

Link doesnt work?

[evildky]

this is what they do on S30's and what I was thinking might be a good idea for your car

[rb25drag]

Thanks. That does look very healthy and strong. I believe I would be happy with that setup. Ill look more into it and design something similar.