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STRUT PART NUMBERS


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#21 datzenmike

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Posted 24 June 2014 - 06:48 AM

The '87? and up 4 pots were larger and fit a vented rotor. Earlier are for the single rotor. They are pretty heavy though.


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#22 housew

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Posted 24 June 2014 - 07:58 AM

yea

 

info i've gathered on those was this

 

z stuff is 2x 54mm pistons = 4580.4mm^2 surface area for solid rotor

s12 calipers early (79-85 i think) were 4x 43mm pistons = 5808.8mm^2 surface area for solid rotor (no real upgrade since the rotor heat is the limiting factor)

s12w calipers (86-95 4wd truck, and 4 runner up to 91) were also 4x43 for vented rotor (decent upgrade)

s13w calipers from 91-95 4 runner were 4x45mm pistons = 6361.7mm^2 for vented rotor. (overkill, wheel fitment issues cause they stick towards outside of car a lot, too heavy)

 

i have a set of the s13s, they are huge and they are heavy. If i put them on and i end up not liking the feel or the unspring weight, ill swap back, i'm not going to get all upset about it.

 

that's a 38% increase in piston area, and probably 50% increase in pad area, and a vented rotor. It will also shift the brake bias way forward (currently basis is too far rearward with 240sx disks out back and whatever master it came with) but ill probably need an adjustable prop valve to dial it in to where i want it.



#23 Dime Dave

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Posted 24 June 2014 - 10:40 AM

Back in the '70's Nissan got approval to run 4 piston calipers on the 240Z in FIA sanctioned events. Datsun Comp offered these calipers as the FIA caliper.

 

They were cast iron, made by Sumitomo and look exactly like the S12 Toyota 4x4 solid rotor calipers. I'd have to dig up the specs, but my guess is it is the same caliper right down to the piston diameter.

 

My 1200 racecar has 200SX struts, 240Z spec Mac Tilton aluminum hubs and the cast iron FIA calipers on the front. With good pads and brake fluid I have never had brake issues racing the car, even on very tight tracks.


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#24 Dime Dave

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Posted 24 June 2014 - 10:55 AM

Regarding comparison of surface area of calipers. I believe with opposing pistons you only account for the surface area of one side when considering clamping force.

 

At least when you look at the effective piston area in a Wilwood catalog for opposing piston calipers, you only see 1/2 the total surface area of the pistons listed.

 

My guess is because one is under pressure but it doesn't count because it needs to resist the pressure applied by the opposing side to have any clamping effect. I suppose the true reality is 50% of the surface area is resisting pressure while the other 50% is exerting it and this would be why only half the piston area is considered.

 

In a single piston caliper all pressure is being exerted against the fixed frame of the caliper, so 100% of the piston area is exerting pressure.

 

Someone with a better understanding of hydraulics might be able to more clearly explain this.


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The Modification Theory -

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#25 housew

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Posted 24 June 2014 - 12:08 PM

good to know that the solid rotors never really held you back with good fluid. I thought that might be the case with the 510 being so light. It good to keep the options open. I don't think my braking is poor now. I just thought i could improve on it for little cost. If its not a big improvement (new setup fits poorly or weighs way too much) then i can go back to solid rotors and pickup s12 calipers or go back to my z stuff.

 

 

they are both opposing piston designs though, so wouldn't the % increase still stand?  I know it doesn't directly relate to increase in braking since there are a lot of factors, but it *should* still give an increase.



#26 njoz1200ute

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Posted 22 October 2017 - 07:17 PM

So......

Anyone know what model this strut comes from

54303-v9307 or last digit 1 cannot tell

#27 datzenmike

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Posted 22 October 2017 - 08:17 PM

I looked but haven't found it yet.

 

It is a left side.


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#28 njoz1200ute

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Posted 28 October 2017 - 05:16 AM

Apparently its aussie market 910.

Happen to know the part number for the strut insert?

#29 KELMO

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Posted 28 October 2017 - 05:33 AM

These #'s are for US market and nowhere near what you have but.....

54303-F5125

54303-W3725

54303-W3726

Insert # 56110-F5125

 

The # for the insert MAY be 56110-V9325.  This is purely a GUESS as I do not have a catalog for other markets.


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