What are the differences between the SI & DX calipers? I know from what I have read here they use different-eared pads, but besides that? They seem to be interchangeable but looks are deceiving.

I need new calipers for my DX and can't find them at reasonable prices. I have a new set of SI ones by happenstance.....

 

pads are not interchangeable.

the piston on the Si is just a tad larger, and caliper is overall a bit stiffer. pad surface area is a bit larger. not much difference really. but no, you cant just put DX pads in.

but nothing's stopping an idiot with a grinder from fitting a square peg in a round hole. im sure you can make it work, but why....

 

I know that pads don't fit...... and I just bought some new ceramic pads last fall...Grrr. [The calipers have pads included but hardly premium ones....]

It looks like the SI pads wipe further inward on the rotors than the DX ones. So they are dragging a bit. But as I learned with the ceramic pads, the rotors soon clean up that new area.

With bigger pistons, I'll have more pedal travel....

 

Also the 88 si and 90-91 si calipers are different. The later caliper has a larger piston bore. I am not sure about the 89.

 

89 should be the same as the only change I've seen was 88 to 89 for everything drivetrain. ( trans and clutch changed too)

 

These are 16CL13VN castings; those appear to be 90-91 SI calipers.

 

yeah to be clear, 88-89 SI front brakes are 100% the same as DX brakes. it was only 90-91 Si that had different brakes including rear disc.

i assumed the 90-91 Si difference was the topic of discussion.

 

Here's a question. Why can't I find ceramic pads for the SI calipers when I have them for the other ones?

RAYBESTOS Part # PGD373M vs PGD273C

 

akebono makes ceramic pads for the si

 

So RockAuto will swap out the 16CL13VN calipers for OHIO CALIPER 313435, which are labeled:

F Caliper Set w/Pads 1500,HF w/CASTING #V (2HEX); Base Mode

So the 64 megabit question is: do 1991 CRX DX & HF's use the same front calipers? I can't see any casting # on my old correction very old calipers....

And thus would my PGD273C pads fit the 313435's?