car understeers ALOT after weight redux...help
#1
Thats not an FC...
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Apr 2001
Location: spring hill, Fla
Posts: 844
Likes: 0
Received 0 Likes
on
0 Posts
car understeers ALOT after weight redux...help
so heres what i have:
1988 SE 5speed, NA (base)
heres whats done to it:
K&N intake
gutted precat 1
60mm race pipe
jspec single
TB mod
Accel superstock 8mm
NGK platinum
heres what ive taken out of it:
PS pump
PS lines
PS/AC bracket
AC compressor
AC condensor
AC dryer
AC lines
Pulley fan
fan shroud
subzero assist
stock exhaust
stock air box and duct
spare tire, jack, tools
the car weighs 2700 w/ the driver...so about 2500 w/o the driver, and the car sits REALLy high now, about 2" higher in the front. and the problem is that i cant take corners fast at all anymore. i feel like i have to SLOW down for turns now...
what can i do to get more traction up front, and return the car's tendency to oversteer?
thanks
chris
1988 SE 5speed, NA (base)
heres whats done to it:
K&N intake
gutted precat 1
60mm race pipe
jspec single
TB mod
Accel superstock 8mm
NGK platinum
heres what ive taken out of it:
PS pump
PS lines
PS/AC bracket
AC compressor
AC condensor
AC dryer
AC lines
Pulley fan
fan shroud
subzero assist
stock exhaust
stock air box and duct
spare tire, jack, tools
the car weighs 2700 w/ the driver...so about 2500 w/o the driver, and the car sits REALLy high now, about 2" higher in the front. and the problem is that i cant take corners fast at all anymore. i feel like i have to SLOW down for turns now...
what can i do to get more traction up front, and return the car's tendency to oversteer?
thanks
chris
#2
Senior Member
![](https://www.rx7club.com/images/misc/15_year_icon.png)
Join Date: May 2002
Location: Woodinville, WA
Posts: 257
Likes: 0
Received 0 Likes
on
0 Posts
I did the same thing on my 1st gen RX-7 and got it down to 2200lbs or less. I am getting new springs and shocks to lower the car, because after the weight reduction (i even removed the sound deadening material) my rear end sits up an extra inch. I'm not an expert, but if your suspension is high now your caster angles could be off i would think, and your roll centers could be off. Just some thoughts. I'll let the experts tell you how to fix it, but I am guessing you are going to need new springs to lower the car level, and might want to balance your sway bars depending on how much weight was removed from the front verses the rear. In my car I relocated the battery (38lbs) from the front to the back, and it made a HUGE differance.
#5
Formula Mazda Driver
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Join Date: Feb 2001
Location: Portland, Oregon, USA
Posts: 680
Likes: 0
Received 0 Likes
on
0 Posts
Thats odd that just removing that weight is causing understeer. I'm guessing the reason is that you removed a LOT of weight from your front end. That weight was causing more load on your front end, especially under braking. Now that there is less load being transferred to the front, it is getting less grip and therefore causing understeer.
Also, believe it or not, a STOCK FC actually has a slight tendecy towards understeer. Unless you are trail-braking, letting off throttle in mid-corner, or inducing oversteer with throttle your car shouldn't have a tendecy to oversteer. But your car is an 88 so who knows what the condition of your stock suspension parts are.
Also, believe it or not, a STOCK FC actually has a slight tendecy towards understeer. Unless you are trail-braking, letting off throttle in mid-corner, or inducing oversteer with throttle your car shouldn't have a tendecy to oversteer. But your car is an 88 so who knows what the condition of your stock suspension parts are.
#6
Thats not an FC...
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Apr 2001
Location: spring hill, Fla
Posts: 844
Likes: 0
Received 0 Likes
on
0 Posts
fo sheezy
tires: 195 up front
215 in the back
wheels: stock phone dial 14" and probably 6" wide
all stock suspension
and Most of the weight removal did come from the front.
so, i can get some AGX's, but the springs, im not sure which ones to get. cuz for the most part, the lowering springs allow the drop by INcreasing the spring rate, usually linear, except Eibach's prokit. so i need to drop it 3" now, or osmething like that. cuz if i only drop it 1.5" or 2" ill be BACK down to the original ride height, so i need to go lower than that.
does this mean ill need some custom springs or something???
custom=$$$
doh
chris
tires: 195 up front
215 in the back
wheels: stock phone dial 14" and probably 6" wide
all stock suspension
and Most of the weight removal did come from the front.
so, i can get some AGX's, but the springs, im not sure which ones to get. cuz for the most part, the lowering springs allow the drop by INcreasing the spring rate, usually linear, except Eibach's prokit. so i need to drop it 3" now, or osmething like that. cuz if i only drop it 1.5" or 2" ill be BACK down to the original ride height, so i need to go lower than that.
does this mean ill need some custom springs or something???
custom=$$$
doh
chris
Thread
Thread Starter
Forum
Replies
Last Post
sherff
Adaptronic Engine Mgmt - AUS
9
02-24-19 12:09 PM