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Thread: 360 & 430 AFCO Front Spring Installation

  1. #1
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    Greg Calo
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    Default 360 & 430 AFCO Front Spring Installation

    AFCO 10” Spring Installation

    360/430 Front Spring Installation

    I found that my F/E was bobbing a bit and at highway speeds it would in some cases bottom on a high spot on the road. I decided to remedy both problems.

    I chose an AFCO replacement spring for the 360 front suspension. It is an AFCO P/N: 23400. See: http://www.afabcorp.com/AFCO_Dynatec...p_coil-over-10.

    It is a 400# spring and it measures 10” in height. The OEM spring is 9.5” +/- in height, and it is about 350# in pressure. The P/N: 23400 AFCO is about 15% slightly greater in pressure which gives the front end just a bit more control, less sway, and takes away the slight dip at speeds.

    The final vehicle height adjustment process can be done easiest with the shock body mounted in the spring compressor. It can certainly be done with the spring mounted, but it is much easier to do it with the spring compressed outside of the vehicle. See 360 Front Shock Removal.

    Have an experienced person compress the springs on a quality piece of equipment if you are not familiar with spring compression. It is a dangerous process for a novice!

    Remember that prior to removing the OEM spring one must measure the original location of the spring support collar to a fixed point on the shock before removing the OEM spring. Mark with a small felt pen on the shock body and record the distance on each shock with a digital vernier or equivalent. You are measuring from the bottom of the spring support collar to any point on the shock for a reference point! When installing the new AFCO spring you will then have a reference point to drop the additional required ½” (8 turns) on the spring support collar.

    Since there is a ½” height difference between the OEM and the AFCO spring, when the AFCO spring is mounted into the coilover the spring supporting collar (measurement) must be lowered by this ½” amount (8 turns) to equal the original spring distance.

    The additional pressure of the AFCO spring will initially raise the vehicle about 1” when the spring support collar is dropped the additional ½” from the OEM location on the shock body. Remember, however, that springs drop a bit after initial usage, and this will happen with the AFCO springs.

    With the spring in the compressor and with the support ring set to the OEM spring distance above-marked, there are approximately 8 additional turns required to lower the spring support ring beyond the ½” (8 turn) spring differential of the AFCO spring so that the vehicle will settle to factory settings. This is based upon the OEM springs set to the OEM Ferrari ride height. Refer to the Motion Ratio table for height changes per given turns.

    See “Lowering A 360/430” for the procedure and preferred tools.

    When the adjustment is done with the spring in the compressor, turning the spring support ring is easy.

    In review, mark the OEM distance of the spring support ring on the shock body before spring removal, compress the OEM spring, loosen the locking ring and remove, slowly loosen the spring support ring until free, remove the spring, install the AFCO spring and compress, reduce the distance you measured for the OEM spring by ½” (8 turns) and then set the spring support ring down 8 additional turns from there. Securely lock the two rings, and then slowly decompress the spring.

    Check the lower shock support bushings before reinstallation and replace if necessary. This is important as they may knock. They are Ferrari P/N: 157630.


    Upon installation of the complete coilover assembly the front body height should be about 4.99” front as prescribed in the “Lowering A 360 or 430” discussion. Check the measurements from below as prescribed by Ferrari, and adjust if necessary.

    Remember that springs do need to settle. So initially the above-suggested settings will make the vehicle ride height seems too high, but after 25-50 miles the body will settle to the correct height

    If too low (which they should not be) one can always turn up the ring to raise the vehicle. See the M.R. chart for the effect.

    See attached Motion Ratio table below.

    Note: Motion Ratio 0.80 figures are shown for reference purposes only. M.R. 0.70 is applicable to the 360 & 430.

    The AFCO springs in the front make a noticeable difference in front end bob and body roll control.

    They are available from:

    [size=4]GAT Racing
    Attn: Mark
    3720 E. Hardy
    Tucson, AZ 85716
    V 520-325-4462
    F 520-323-1429
    [/size=4]
    Attached Images Attached Images  
    Attached Files Attached Files

  2. #2
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    Default

    Follow up to this installation.

    I highly recommend doing it. The difference in the front end is incredible!

    It scrapes less on low spots, and the f/e control is fabulous!

    A definite great improvement over factory springs.

    If you have a Challenge Stradale do it as well. You'll notice an incredible difference.

  3. #3
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    Don't get your comments about CS owners wanting to do this mod.

    The CS has 20% uprated springs which equates to 420 vs this which is 400. Furthermore the CS springs are a significant improvement to unsprung weight too as they are made from titanium and weigh next to nothing.

  4. #4
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    Incorrect.

    Whole underside Cs = Modena part for part. Absolute fact.

    Only the Challenge car has titanium springs and different suspension parts.

  5. #5
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    Quote Originally Posted by Gcalo View Post
    Incorrect.

    Whole underside Cs = Modena part for part. Absolute fact.

    Only the Challenge car has titanium springs and different suspension parts.
    Sorry but your wrong and I've included the different part numbers too. Here's a quote from the Challenge Stradale brochure (page 42) which describes them.

    "Where the damper springs are concerned the change focused in particular on the manufacturing process. Because titanium is not an easy material to machine, a specific wrapping and grinding process had to be devised, very diffferent from the one normally used for steel."

    Ferrari 360 (Common Part)
    Front L Shock absorber 174722 £ 741.43 £ 871.18
    Front R Shock absorber 174722 £ 741.43 £ 871.18
    Rear L Shock absorber 197020 £ 762.40 £ 895.82
    Rear R Shock absorber 197020 £ 762.40 £ 895.82
    Total £3,534.00

    Ferrari 360 Modena
    Front L Spring (Steel) 182404 £ 35.16 ($71.06) each
    Front R Spring (Steel) 182404 £ 35.16 ($71.06) each
    Rear L Spring (Steel) 190677 £ 37.35 ($75.49) each
    Rear R Spring (Steel) 190677 £ 37.35 ($75.49) each

    vs;
    Ferrari 360 Challenge Stradale
    Front L Spring (Titanium) 195443 £ 726.15 ($1,467.70) each
    Front R Spring (Titanium) 195443 £ 726.15 ($1,467.70) each
    Rear L Spring (Titanium) 195444 £1,073.16 ($2,169.07) each
    Rear R Spring (Titanium) 195444 £1,073.16 ($2,169.07) each

    The springs are 20% uprated on the CS compared to the Modena. Uprating them basically means they are stiffer so they resist compression more, this helps with cornering better by reducing pitch and dive. The rear anti-roll bar on the CS was also uprated by 20% too - this reduces body roll significantly improving cornering speed on a track significantly. Now these weights really startled me. I was highly impressed with the weight of the full damper and titanium springs on the 360CS.

    1. 360 Front dampers + Titanium CS Springs + top flamblock: 3.88Kg's. (8.55 pounds) per corner
    2. 360 Rear dampers + Titanium CS Springs + top flamblock: 4.77Kg's. (10.51 pounds) per corner

  6. #6
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    And here's a picture of my titanium springs too....

    And yes, they make a HUGE difference not to mention improving the unsprung weight significantly. Oh, and the CS uses the same bushes as the challenge cars too...
    Attached Images Attached Images   

  7. #7
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    You have something incorrect there. I spent many hours in Ferrari's parts database confirming my info.

    The cars underneath are identical!

    When I planned to change the springs I looked at CS sway bars front and rear, CS shocks, etc, and all the P/N's were identical.
    I found out that the CS was atest bed for the future models such as Scuderia, 16M, etc., and was more of cosmetic change than functional changes.

    parts content was kept nearly identical.

  8. #8
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    Quote Originally Posted by Gcalo View Post
    You have something incorrect there. I spent many hours in Ferrari's parts database confirming my info.

    The cars underneath are identical!

    When I planned to change the springs I looked at CS sway bars front and rear, CS shocks, etc, and all the P/N's were identical.
    I found out that the CS was atest bed for the future models such as Scuderia, 16M, etc., and was more of cosmetic change than functional changes.

    parts content was kept nearly identical.
    Why do you still insist on this in light of the evidence above???

    The part numbers speak for themselves!

    CS Parts in the suspension which are different;

    1. Titanium Springs - see above
    2. All the suspension (8 of per corner!) Bushes (flamblocks) - same part number as Challenge cars
    3. Titanium wheel nuts - different look to Modena bolts and weigh less
    4. Different wheel alignment
    5. Carbon ceramic brakes with different caliper bolts
    6. Rear anti roll bar - stiffer
    7. Even the lower arms are different on the later spec CS's (they where prone to cracking so Ferrari changed the part design).

    How much more evidence do you need?

    I know because I've been though every part myself and just as importantly held the parts IN MY HANDS...

    Ferrari Challenge Stradale - Microfiche Parts
    http://www.prosport-ferrari.co.uk/pa....php?car_id=22

    Ferrari Modena - Microfiche Parts
    http://www.prosport-ferrari.co.uk/pa....php?car_id=27

  9. #9
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    Challenge Stradale (TITANIUM) Front Spring - Part No 195443;
    http://www.prosport-ferrari.co.uk/pa...art_sku=195443

    360 Modena/360 Spider/430 Coupe/430 Spider Front (STEEL) Spring - Part No 190676;
    http://www.prosport-ferrari.co.uk/pa...art_sku=190676

  10. #10
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    Rear Anti Rollbar (360 SPIDER AND MODENA ONLY) - Part No. 182432
    http://www.prosport-ferrari.co.uk/pa...art_sku=182432

    Rear Anti Rollbar (HOLLOW AND UPRATED) - Fitment for CS & 430 Scuderia - Part No. 198416.
    http://www.prosport-ferrari.co.uk/pa...art_sku=198416

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