| Author | Message | ||
| William H (Countachxx)
Advanced Member Username: Countachxx Post Number: 2851 Registered: 2-2001 |
I have F50 calipers & 14" rotors on both my 512TR road car & 512TR race car. In the road car the fade is much better and the stopping power has increased a huge amount | ||
| Andrew-Phillip Goalen (Andrewg)
Member Username: Andrewg Post Number: 264 Registered: 9-2002 |
guys, the standard caliper bolt spacing is the same on a 964 with big reds as it is on a spare standard Tr caliper, anybody have a brembo part number? | ||
| Lashdeep Singh (Lashss)
New member Username: Lashss Post Number: 9 Registered: 7-2003 |
Jselevan-It "might"...who's asking?  Greg-the cross referencing to Porsche pieces is a great idea. Although, I wouldn't have thought that they would be any cheaper though. I'll see if I can find a spec sheet for the kit and maybe these are indeed the "Big Red" calipers that you P guys always talk about? Lashdeep Lashdeep | ||
| James Selevan (Jselevan)
Member Username: Jselevan Post Number: 683 Registered: 6-2002 |
Lash, I noticed in your profile that you live in Washington, D.C. Is your occupation related to government work? Jim S. | ||
| Greg_gray (Greg_gray)
New member Username: Greg_gray Post Number: 6 Registered: 7-2003 |
If someone would measure the distance between the bolt holes both front and rear if possible? That would be interesting for me as I believe this is virtually the same caliper used on my Porsche. It would also help you guys as Porsche stuff is much cheaper. As a point of interest my caliper piston sizes are 44m and 36mm so that could be better than what you guys are using now. The rear pistons are 36mm and 30mm. The disc size is 322mm both front and back. It is correct you can only use a proporting valve on the rears. Otherwise a adjustable tandem master cylinder may be required or fit calipers on the rear with bigger pistons. Maybe that is a bit extreme but you always need excess pressure on the rear and then cut it back. To address your issue directly what I would look at is what rating is your current proportioning valve? You will have one in the system somewhere. The valve may even have a rating on it! I don't know Testas that well but basically all cars have them somewhere. The point being maybe the valve is not applying enough pressure to the rears? If so, change it and this will help your brake balance. To state the obvious when your playing with the brakes you should do some calculations regarding resultant pressure changes. I'm sure if you had an accident an insurance company wouldn't look too favourably at a custom brake installation that actually dimished your cars ability to stop in a controlled manner. | ||
| Lashdeep Singh (Lashss)
New member Username: Lashss Post Number: 6 Registered: 7-2003 |
It pays the bills! | ||
| dave handa (Davehanda)
Intermediate Member Username: Davehanda Post Number: 1431 Registered: 5-2001 |
Hey Lash, Welcome to Ferrari chat! Nice profile...Pimp(?) is your occupation now, you dirty dog! :-) I'm envious; I may have to switch occupations too, and work my way up to a 12 cylinder car... :-) | ||
| Lashdeep Singh (Lashss)
New member Username: Lashss Post Number: 3 Registered: 7-2003 |
A small correction to CG's post... The F40 and F50 calipers are almost identical except for the piston diameters. Both are Al, and of the four piston design. The smaller, Leading Edge Piston size of the F40 is sized at 38mm where the same piston is sized at 40mm on the F50 piece. Both of the Trailing Edge Pistons on both calipers are sized at 44mm however. This would suggest greater clamping force for the F50 caliper. Having said that, Stillen and Brembo do recommend using a very mild street compound pad to combat the drastic increase in clamping force and to resist locking up the front brakes. A proportioning valve of some sort may help... Lashdeep | ||
| Charles Perry (Cgperry)
New member Username: Cgperry Post Number: 3 Registered: 10-2001 |
I have a similar upgrade kit on my 87 TR (F40 vs. F50). I think the only difference is an extra piston in the F50 caliper versus my F40 calipers. I bought my kit from the company in the FCA newsletter, but it turned out to actually be from Stillen Motorsports, who charges a more reasonable price. I don't think there is much difference in stopping distances because even the stock brakes are sufficient to lock up all the wheels. The advantage to the big brakes is heat dissipation. It serves you much better at track events or mountain drives where the heavy TR tends to cook brakes pretty regularly. In fact, my stopping distances are now longer if I'm not careful because the oversize brakes lock up VERY easily. I think they are dangerous in a panic stop because the front of the TR is so light that you have to brake lightly for a split second to get the weight transfer to start shifting forward, and then you can go heavy on the brakes. I had looked into a bias adjustment locally, but they all seem to adjust the rear rather than the front. Several companies had recommended I try less aggressive pads in the front to mechanically adjust the bias. I haven't done anything yet except adjust my driving style with the car. If Ric manages to sort out a better idea, I will emulate it. | ||
| neal (95spiderneal)
Junior Member Username: 95spiderneal Post Number: 211 Registered: 3-2002 |
does anyone know of stopping distance tests comparing stock with front upgrades and all 4 upgraded. i recall seeing these type of comparos on other cars but not f's and result was upgraded had less fade but no improvement or worse distances(?) | ||
| Ric Rainbolt (Ricrain)
Member Username: Ricrain Post Number: 542 Registered: 2-2002 |
Yes, I'm installing them. No, we're not doing the backs, at least for now. We'll adjust the bias if there's a problem. If it remains a problem, we'll probably convert the rears as well. No, they're being used with 17" wheels. All the front suspension parts are off the car, getting powder coated or plated. I'll post completed pictures later. | ||
| Jim Avery (Boxer12)
Junior Member Username: Boxer12 Post Number: 84 Registered: 6-2003 |
Brembo's are sweet! Nothing like BIG BRAKE go give the lady's a thrill. Get ready to put your passengers thru the windshield (if they don't buckle up..LOL) On the rear, I have heard of guys leaving the originals on and using them just for parking brake. | ||
| Henryk (Henryk)
Member Username: Henryk Post Number: 993 Registered: 8-2001 |
Ric: Are you installing these on the front, and not a pair on the back? Where did you get these? Is there a model number for them? Can the calipers be used with the stock discs? Are these being installed using stock wheels? What is the year of the TR? I really like them!!!!!! Thanks. | ||
| Mitchell Le (Yelcab1)
Member Username: Yelcab1 Post Number: 608 Registered: 11-2001 |
$2200 bucks. Wow, getting closer to the BrassRing must pay well. | ||
| Norm Plaistowe (Normp)
Junior Member Username: Normp Post Number: 159 Registered: 11-2001 |
Rick, very nice!! Are you doing the install? | ||
| Rob Lay (Rob328gts)
Board Administrator Username: Rob328gts Post Number: 5748 Registered: 12-2000 |
Holy race brakes batman! | ||
| Ric Rainbolt (Ricrain)
Member Username: Ricrain Post Number: 541 Registered: 2-2002 |
The rotors are stock-sized, but are cross-drilled (not my choice) and cadmium plated. The front set was $2200 USD with all hardware, including braided steel lines. | ||
| Brian Wasinger (Bpwasi)
New member Username: Bpwasi Post Number: 38 Registered: 3-2003 |
Nice! Are you replacing the rotors also? How much did the calipers set you back? | ||
| Ric Rainbolt (Ricrain)
Member Username: Ricrain Post Number: 540 Registered: 2-2002 |
Here's some pix of the OEM calipers vs. the new ones that I'm about to install.   |