Advice on suspension tinkering
#1
Advice on suspension tinkering
Background: Car is a 99 NB1 (2380lbs with rollbars/harness bars/seats/hardtop)
I am currently on FCM flat rides (550/425) with sport bumpstops running 1" front bar and 11mm rear. Alignment - F Camber -2.4/ 0 toe/ 4.6 caster, R Camber -2.1/ 0 toe - Ride Height at 12"F/12.25"R roughly 4.25"/4.5" - 225/45/15 NT01s on 15x9 6ULS
Car turn in is absolutely fantastic at my home tracks (MRLS/THILL/Sonoma) but am having issues with oversteer. Have taken rear bar off and it has helped slightly but still unsettling mid corner.
Have been too meek to ask for additional support from FCM besides the initial email i sent to which i was instructed to remove rear bar and play around with alignment.
I am thinking of changing spring rates at this point. Was told front shocks could handle +/-100 and rear +/-50 lbs. Also getting 1.25" RB Front Sway Bar.
Would 650/425 with 1.25" front bar/ 11mm bar be feasible? Or would i understeer like a pig?
Any input from more experienced drivers would be highly appreciated.
Thanks!
I am currently on FCM flat rides (550/425) with sport bumpstops running 1" front bar and 11mm rear. Alignment - F Camber -2.4/ 0 toe/ 4.6 caster, R Camber -2.1/ 0 toe - Ride Height at 12"F/12.25"R roughly 4.25"/4.5" - 225/45/15 NT01s on 15x9 6ULS
Car turn in is absolutely fantastic at my home tracks (MRLS/THILL/Sonoma) but am having issues with oversteer. Have taken rear bar off and it has helped slightly but still unsettling mid corner.
Have been too meek to ask for additional support from FCM besides the initial email i sent to which i was instructed to remove rear bar and play around with alignment.
I am thinking of changing spring rates at this point. Was told front shocks could handle +/-100 and rear +/-50 lbs. Also getting 1.25" RB Front Sway Bar.
Would 650/425 with 1.25" front bar/ 11mm bar be feasible? Or would i understeer like a pig?
Any input from more experienced drivers would be highly appreciated.
Thanks!
Last edited by thoreau; 05-23-2015 at 09:16 PM.
#6
I bet that bar makes a big difference as well. Maybe keep the current rates with the larger front bar and see how that goes. Still not what you want then start playing with spring rates.
In my autocross car I noticed a massive difference in feel with a slightly stiffer front bar. I am on 140TW R1Rs though. I am sure the NT01s have much more to offer in overall grip.
In my autocross car I noticed a massive difference in feel with a slightly stiffer front bar. I am on 140TW R1Rs though. I am sure the NT01s have much more to offer in overall grip.
#8
what is your toe looking like?
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703.430.3303
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#11
I'm sharp
might want to double check your toe before spending $$. the suspension bolts might have loosened, it sounds like you have a bit of + rear toe.
might want to double check your toe before spending $$. the suspension bolts might have loosened, it sounds like you have a bit of + rear toe.
__________________
OG Racing
Your Source For Motorsports Safety Equipment
WWW.OGRACING.COM
800.934.9112
703.430.3303
info@ogracing.com
OG Racing
Your Source For Motorsports Safety Equipment
WWW.OGRACING.COM
800.934.9112
703.430.3303
info@ogracing.com
#13
Needs more front spring.
I'm at 600/350 right now with the 1.25" rb front and 14mm rear with similar alignment numbers and have just the touch of understeer that I desired over the 550/350 spring rates.
Same home tracks as you...
Or try dialing in more rear camber... that's what some of the local folks seem to do. +2/10ths split in back.
I'm at 600/350 right now with the 1.25" rb front and 14mm rear with similar alignment numbers and have just the touch of understeer that I desired over the 550/350 spring rates.
Same home tracks as you...
Or try dialing in more rear camber... that's what some of the local folks seem to do. +2/10ths split in back.
Last edited by SchmoozerJoe; 05-27-2015 at 11:57 AM.
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