GTS Brake upgrade for GT
#18
IIRC - the GT brakes are actually an upgrade from the S4. The GT's have 2 different size caliper pistons, with the leading edge piston slightly larger then the other. I doubt that you will see much difference at all from the GT's to the Big Reds...Save the BIG$$$ and just paint your current calipers red. IIRC (Again) - the outer dimensions are the same.
#19
No issue on the air intake hijack.
Re the SFR, can someone enlighten me on the ABS compatibility issue?
Dennis,
IIRC, you have set your car up for the track. What weight are you running?
Tim,
If I make the decision to go, I will let you know to see if you were able to source some already.
Thanks everyone
Re the SFR, can someone enlighten me on the ABS compatibility issue?
Dennis,
IIRC, you have set your car up for the track. What weight are you running?
Tim,
If I make the decision to go, I will let you know to see if you were able to source some already.
Thanks everyone
#20
fst951, Castrol SRF is not a silicon based fluid. It's a DOT 4 fluid and supposed to be one of the best brake fluids on the market. Just look at the wet boiling point, 270C.
Read more about brake fluids on http://www.stoptech.com/whitepapers/brakefluid1a.htm
Read more about brake fluids on http://www.stoptech.com/whitepapers/brakefluid1a.htm
#21
Originally Posted by Cameron
Current setup is stock calipers with Hawk Street Plus pads on all 4 corners with cast hole rotors, braided hoses and 33 bar (IIRC) rear brake bias valve.
#23
Originally Posted by Cameron
Re the SFR, can someone enlighten me on the ABS compatibility issue?
Dennis,
IIRC, you have set your car up for the track. What weight are you running?
Dennis,
IIRC, you have set your car up for the track. What weight are you running?
The cheapest I've seen Castrol SRF is $57/liter at daliracing.com. The advantage is that its wet boiling point is so high that you could theoretically save money because you wouldn't have to change your brake fluid as often. SRF's wet boiling point is still lower than most good fluids' dry boiling point so most people use Superblue or Motul and change more often.
See this fluid boiling point chart on this page.
I use Motul instead of Superblue because it's quite readily available at most motorcycle shops that are open late or on weekends. ATE Superblue is sort of a specialty item that only higher end auto shops or racing supply places have.
#24
IIRC - the GT brakes are actually an upgrade from the S4. The GT's have 2 different size caliper pistons, with the leading edge piston slightly larger then the other. I doubt that you will see much difference at all from the GT's to the Big Reds...Save the BIG$$$ and just paint your current calipers red. IIRC (Again) - the outer dimensions are the same.
#25
Man, Rehan maybe the English to Swedish translator is kaput, but I read the link you sent and it sure looks to support what I said.
You would think that Castrol, who makes the stuff would print the correct info....
Castrol SRF Racing Brake Fluid
Castrol SRF Racing Brake Fluid is an ultra high performance product formulated specifically to satisfy the ever increasing stresses placed upon the braking systems used in international motorsport. The exceptional performance of Castrol SRF is due to a novel silicon ester technology pioneered by Castrol and unique to the extent that it has been granted patent-protection in numerous....
Sure looks like it is silicone based to me....
Check it out
http://www.castrol.com/castrol/produ...tentId=7001576
Good luck.
You would think that Castrol, who makes the stuff would print the correct info....
Castrol SRF Racing Brake Fluid
Castrol SRF Racing Brake Fluid is an ultra high performance product formulated specifically to satisfy the ever increasing stresses placed upon the braking systems used in international motorsport. The exceptional performance of Castrol SRF is due to a novel silicon ester technology pioneered by Castrol and unique to the extent that it has been granted patent-protection in numerous....
Sure looks like it is silicone based to me....
Check it out
http://www.castrol.com/castrol/produ...tentId=7001576
Good luck.
#26
Is SFR a silicone based brake fluid? For some reason I thought it was
If so, you may want to check with compatability issues.
If so, you may want to check with compatability issues.
It is much different formulation and can mix with dot 3 or dot 4 fluid.
#28
GTS brakes
I converted my 89 GT to big red's, with stock pads, I noticed a difference. I also added a 55 Bar bias valve later. The 55 Bar val also made a big difference. On my 93 GTS I've just added the 55 Bar bias valve and also saw a difference. My son has a 350HP 951 (highly modified) with the big reds on the front. On the track it made a huge difference, both in brake performance and confidence.
I recommend the swap over!
Jim Mayzurk
93 GTS
I recommend the swap over!
Jim Mayzurk
93 GTS
#29
Hi guys.
The chemistry is what I was arguing. It is silicone based.
I understand it isn't DOT 5, but if you go on to read the description, it does state that it may leave a less firm pedal because of its compressibility. This seems to be exactly what the customer is complaining about. I also called castrol on the phone and asked about the compatibiliy with ABS pumps. They didn't know how to anser the question of whether it was safe to use or not.
I might just change to Motul 600 and see how you like the pedal then.
Good luck.
The chemistry is what I was arguing. It is silicone based.
I understand it isn't DOT 5, but if you go on to read the description, it does state that it may leave a less firm pedal because of its compressibility. This seems to be exactly what the customer is complaining about. I also called castrol on the phone and asked about the compatibiliy with ABS pumps. They didn't know how to anser the question of whether it was safe to use or not.
I might just change to Motul 600 and see how you like the pedal then.
Good luck.
#30
I appreciate all of the feedback and opinions, as well as the research on the SRF.
I have been running it for a year now and the pedal is nice and firm. This car is an agressively driven DD with track use of several DE's per year. I wouldn't want to change away from something that is working for me until I understand fully if there is an issue.
Anyone else here use SRF with the Bosch ABS? Any problems to report? I have envoked the ABS only a couple of times, and it did its thing. ie didn't let me lock 'em up. If there was a problem, what symptoms would I observe?
Thanks!
I have been running it for a year now and the pedal is nice and firm. This car is an agressively driven DD with track use of several DE's per year. I wouldn't want to change away from something that is working for me until I understand fully if there is an issue.
Anyone else here use SRF with the Bosch ABS? Any problems to report? I have envoked the ABS only a couple of times, and it did its thing. ie didn't let me lock 'em up. If there was a problem, what symptoms would I observe?
Thanks!