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 Park Avenue spring question

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Riv in Reno
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Park Avenue spring question Empty
PostSubject: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 2:59 am

Are the Park Avenue springs the same as on the Riv, or stronger for the heaver weight? Riv at 3690 and the P.A. at 3740. Would they be a "drop on" fit?
Thanks,
Riv in Reno
'98 Riv with nothing new added yet...
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Jason
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Park Avenue spring question Empty
PostSubject: Re: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 8:33 am

If you just want to know if they'll fit, yes they will, because they use the same springs (97 used 'firm' suspension springs, 98-99 used soft)
If you are looking for a set of firmer springs, I would definately go with a set of eibach STS springs (eibach part number 3872.140). I cross referenced a few parts like the rear lower control arms and they are the same on the 98-05 STS. I started working on the part number list and came to the same conclusion that none of the factory stuff is going to be really firm. Even the STS and SSEI seemed to be weak as they were the same as the standard suspension level springs.
If I had to guess which OEM spring was firmest, I'd say those 00-05 Bonneville numbers are the firmest. Bonneville only and its a Pontiac. But than the Bonny is probally one of the lightest cars on that list too. Same set of springs used on the SSE and SSEI too. I would bet that the cadillac seville STS springs are firmer than the riviera's too.



Special thanks to Eric Fisher for the help with the Part numbers.

Code:

    ----- Original Message -----                   
                                                                      YEAR                MODEL
                                              FRONT
22132791      CKA,SHM,JY,JZ,KA              95-96              RIVIERA
                                                                      95-96              AURORA
22197216          PA,PB,MJ,MC                      97                  RIVIERA
                                                                      97-99              AURORA
                                                                      97-05              PARK AVE (firm ride)
                                                                        98                  SEVILLE
                                                                      02-04              SEVILLE
22197212          MA,MB,BH,CK,CR              98-99              RIVIERA
                                                                      97-05                PARK AVE (soft ride)
22197594        CL,CM,DK,AB,AN,AJ            00-05                BONNEVILLE
                                                                      01-02                AURORA
                                                                      00-05                DEVILLE
22197599      DR,DS,AY,AR                      01-03                AURORA
22197295  FLR,BL,YM,AAD,AAF,AAL    97-02                ELDORADO
                                      AAK                        88-92                ALANTE
                                                                      92-97              SEVILLE
                                                                        94                  DEVILLE
88955403            BJ,DM                              02-04                SEVILLE
22197592            CH,CJ                              02-05                DEVILLE


                                            REAR
25655478  PCW,RSZ,RTA,DP,CY,RTB  95-97                        RIVIERA
                                                                      95-97                AURORA
                                                                      01-03                AURORA
                                                                      97-05                PARK AVE
22078069                RSY                              95-97                RIVIERA
                                                                        95-97                AURORA
                                                                        97-05                PARK AVE
25655473    NCR,CS,FF,FD,RAC,RAD        98-99                RIVIERA
                                                                        97-05                PARK AVE
                                                                        98-04                SEVILLE
25655481      CL,CM,CN,CP                            00-05                BONNEVILLE
25633132                RAH                                97                  PARK AVE
22076935        NAH,CC,NAJ                          94-02                ELDORADO
                                                                            93                  ALANTE
                                                                        93-97              SEVILLE
                                                                        94-99              DEVILLE
25725866                  AC                                00-02              ELDORADO
25725867                  AD                                00-02              ELDORADO
22078179              RYB                                97-99              DEVILLE
25655475              NCT                                99-04              SEVILLE
25670966        PDB,PCF,CZ                        00-05                DEVILLE
25670967        PDC,PDD,PCH                      00-05                DEVILLE
25758982                  GB                                02-04              SEVILLE


Last edited by on Mon Feb 19, 2007 12:44 pm; edited 3 times in total
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AA
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Park Avenue spring question Empty
PostSubject: Re: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 8:46 am

PAs and Rivs probably used the same springs. There really isn't a difference in weight. My Riv weighs 3940 lbs.

I'm very interested in this info. Try pasting the RTF into [code][/code].

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

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Riv in Reno
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Park Avenue spring question Empty
PostSubject: Re: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 12:18 pm

Many thanks Jason, this is the kind of info I am looking for. When I put the KYB struts on I will change the springs as well.
Thanks'

Riv in Reno
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deekster_caddy
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Park Avenue spring question Empty
PostSubject: Re: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 12:32 pm

Jason, thanks for the great spring info. Please keep us informed how the spring swap goes. I like my 'luxury' ride, but I would be happy with a stiffer spring too. The auto-levelling suspension should be able to absorb slight differences in resulting ride height.

Reno, If you could, let your air shocks all the way down before and after the spring change and measure the ride height!

-Derek
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Jason
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Park Avenue spring question Empty
PostSubject: Re: Park Avenue spring question   Park Avenue spring question EmptyMon Feb 19, 2007 12:48 pm

I think the factory springs, at least on the 98-99 are too compliant. To obtain "good" handling with the soft factory springs would require swaybars that are much larger than the stock suspension components could handle.

I think a firmer, shorter spring would be an ideal compliment to the addco swaybars that some of us have ordered. I have seen a few cases of sagging eibachs on the b-body boards, but overall I think they have a good reputation.
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