C4 to C5 calipers/rotors
#1
Pro
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Member Since: Dec 1999
Location: Venetia,Pa,USA
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C4 to C5 calipers/rotors
I've switched my C4 to C5 calipers/rotors. Front only. It takes almost the entire stroke of the pedal to have a hard pedal/brakes. If I pump them once it is a full pedal like the C4 calipers are with just one push of the brake. The first thing that I suspected was air in the system. Bleed it at least 5 times. Switched back to C4 caliper/rotors and everything is back to normal. Put C5 parts back on [ bleed 3 times ] and same problem. I assume the additional pedal movenment is due to the additional C5 caliper volume?? Problem is ?????? Due all brake boosters have adjustable push rods?? If I extended the push rod an additional amount [ length not yet determined ] will that do the trick??? Or am I missing something?? If so what do I need to do to correct this problem since I know that others have done this???
THANKS FOR ALL SUGGESTIONS/HELP and I do mean HELP.
THANKS FOR ALL SUGGESTIONS/HELP and I do mean HELP.
#2
Le Mans Master
do a search in the c4 tech section.
I'm sorta remembering some folks had to go to a bigger master.
I'm sorta remembering some folks had to go to a bigger master.
#3
Race Director
On long straights I still have to double pump, due to pad knock back.
#6
Team Owner
What year is your car?? Were the OEM front calipers single or dual piston?
When I installed C5 front brakes on my 87, I noticed a very slight difference in pedal travel but the upgrade worked fine. I also installed the Doug Rippie brake bias spring and that didn't change pedal feel at all.
When I installed C5 front brakes on my 87, I noticed a very slight difference in pedal travel but the upgrade worked fine. I also installed the Doug Rippie brake bias spring and that didn't change pedal feel at all.
#8
Melting Slicks