RX-7 Spring rates.
#1
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RX-7 Spring rates.
Does anybody know RX-7 spring rates for base models (Base,SE) and sport models (GTU, Turbo)?
Has anyone ever put stiffer springs from a GTU or Turbo on a base model?
I know most of you will tell me to just buy aftermarket springs, but they are not legal for SCCA Solo2, so I have to stay with stock springs.
If anyone knows the spring rates, that would be great. Yeah.
Has anyone ever put stiffer springs from a GTU or Turbo on a base model?
I know most of you will tell me to just buy aftermarket springs, but they are not legal for SCCA Solo2, so I have to stay with stock springs.
If anyone knows the spring rates, that would be great. Yeah.
#2
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soft suspension specs-
right front spring- 12.0mm wire diameter, 147.0mm coil diameter, 355.5mm free length, 5.83 coils
left front spring- 12.2mm wire dia, 147.2mm coil dia, 366.0mm free length, 6.05 coils
front stabilizer bar- 22.0mm dia
right and left rear spring- 9.9mm wire dia, 84.6mm coil dia, 367mm free length, 10.81 coils
rear atabilizer bar- 13.0mm dia
right front spring- 12.0mm wire diameter, 147.0mm coil diameter, 355.5mm free length, 5.83 coils
left front spring- 12.2mm wire dia, 147.2mm coil dia, 366.0mm free length, 6.05 coils
front stabilizer bar- 22.0mm dia
right and left rear spring- 9.9mm wire dia, 84.6mm coil dia, 367mm free length, 10.81 coils
rear atabilizer bar- 13.0mm dia
#3
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harder suspension specs-
right front spring- 11.8mm wire dia, 146.8mm coil dia, 327.0mm free height, 5.31 coils
left front spring- 12.0mm wire dia, 147.0mm coil dia, 336.5mm free length, 5.51 coils
right and left rear springs- 10.1mm wire dia, 84.4mm coil dia, 355mm free height, 10.79 coils
rear stabilizer bar- 13.0mm
right front spring- 11.8mm wire dia, 146.8mm coil dia, 327.0mm free height, 5.31 coils
left front spring- 12.0mm wire dia, 147.0mm coil dia, 336.5mm free length, 5.51 coils
right and left rear springs- 10.1mm wire dia, 84.4mm coil dia, 355mm free height, 10.79 coils
rear stabilizer bar- 13.0mm
#6
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hmm, stock is around 130lbs/in for the turbo. the turbo ones are stiffer then N/A by a little. but if you put them on your car it might raise it a bit.
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That's funny, I wasn't aware you could install TURBO springs on an NA car, and still be Solo2 E-Stock legal..
:\
If you're going to swap to GTU springs, you've gotta swap *everything* to GTU spec. IOW, you have to run the 4:30 rear gear, you have to run the GTU tranny, etc etc.. Can't create a model by swapping in parts.
All IMHO, I'm not a Solo2 guy
PaulC
:\
If you're going to swap to GTU springs, you've gotta swap *everything* to GTU spec. IOW, you have to run the 4:30 rear gear, you have to run the GTU tranny, etc etc.. Can't create a model by swapping in parts.
All IMHO, I'm not a Solo2 guy
PaulC
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Originally posted by BLUE TII
soft suspension specs-
right front spring- 12.0mm wire diameter, 147.0mm coil diameter, 355.5mm free length, 5.83 coils
left front spring- 12.2mm wire dia, 147.2mm coil dia, 366.0mm free length, 6.05 coils
front stabilizer bar- 22.0mm dia
right and left rear spring- 9.9mm wire dia, 84.6mm coil dia, 367mm free length, 10.81 coils
rear atabilizer bar- 13.0mm dia
soft suspension specs-
right front spring- 12.0mm wire diameter, 147.0mm coil diameter, 355.5mm free length, 5.83 coils
left front spring- 12.2mm wire dia, 147.2mm coil dia, 366.0mm free length, 6.05 coils
front stabilizer bar- 22.0mm dia
right and left rear spring- 9.9mm wire dia, 84.6mm coil dia, 367mm free length, 10.81 coils
rear atabilizer bar- 13.0mm dia
#9
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Originally posted by Ziggy682
WOW! When I posted, I didn't think I would get a response like this. This far exceeded my expectations. So, both suspensions have the same diameter rear stabilizer bar as well. Anyone know if they are exactly the same, or if the "harder" bar has shorter arms to make it harder?
WOW! When I posted, I didn't think I would get a response like this. This far exceeded my expectations. So, both suspensions have the same diameter rear stabilizer bar as well. Anyone know if they are exactly the same, or if the "harder" bar has shorter arms to make it harder?
#10
Rotary Motoring
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I believe its all the same for the rear stabilizer bar.
Perhaps they were wary of power on oversteer in the more powerful TIIs causing problems for Joe driver?
Perhaps rear roll stiffness affects DTSS operation?
The #s I posted are from '87 FSM, I don't know if they changed springs for the heavier S5 cars, though I am almost certain they did for the convertables.
"Harder" suspension is not just in TIIs, right? Isn't it any 5 lug 86-88? Not sure when they went to all 5 lug in '89.
Perhaps they were wary of power on oversteer in the more powerful TIIs causing problems for Joe driver?
Perhaps rear roll stiffness affects DTSS operation?
The #s I posted are from '87 FSM, I don't know if they changed springs for the heavier S5 cars, though I am almost certain they did for the convertables.
"Harder" suspension is not just in TIIs, right? Isn't it any 5 lug 86-88? Not sure when they went to all 5 lug in '89.
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Originally posted by BLUE TII
I believe its all the same for the rear stabilizer bar.
Perhaps they were wary of power on oversteer in the more powerful TIIs causing problems for Joe driver?
Perhaps rear roll stiffness affects DTSS operation?
The #s I posted are from '87 FSM, I don't know if they changed springs for the heavier S5 cars, though I am almost certain they did for the convertables.
"Harder" suspension is not just in TIIs, right? Isn't it any 5 lug 86-88? Not sure when they went to all 5 lug in '89.
I believe its all the same for the rear stabilizer bar.
Perhaps they were wary of power on oversteer in the more powerful TIIs causing problems for Joe driver?
Perhaps rear roll stiffness affects DTSS operation?
The #s I posted are from '87 FSM, I don't know if they changed springs for the heavier S5 cars, though I am almost certain they did for the convertables.
"Harder" suspension is not just in TIIs, right? Isn't it any 5 lug 86-88? Not sure when they went to all 5 lug in '89.
The cars that have the hard suspension are GTU, GTUs, and TurboII.
I found a guy selling all 4 shocks and struts from an S5 TurboII for real cheap, but I'm afraid those springs won't work well on my 86 base because it's so much lighter.
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Originally posted by Silkworm
That's funny, I wasn't aware you could install TURBO springs on an NA car, and still be Solo2 E-Stock legal..
:\
If you're going to swap to GTU springs, you've gotta swap *everything* to GTU spec. IOW, you have to run the 4:30 rear gear, you have to run the GTU tranny, etc etc.. Can't create a model by swapping in parts.
All IMHO, I'm not a Solo2 guy
PaulC
That's funny, I wasn't aware you could install TURBO springs on an NA car, and still be Solo2 E-Stock legal..
:\
If you're going to swap to GTU springs, you've gotta swap *everything* to GTU spec. IOW, you have to run the 4:30 rear gear, you have to run the GTU tranny, etc etc.. Can't create a model by swapping in parts.
All IMHO, I'm not a Solo2 guy
PaulC
Last edited by Ziggy682; 07-02-02 at 09:24 AM.
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