serbRX7

iTrader: (9)

i am looking to upgrade breaks...i was looking in to getting Porsche front brake calipers... any details on what should i get

year -

model -

will anything need to be modified

serbRX7

iTrader: (9)

i think 993 or 911 turbo front calipers...just wanna confirm that...

any one know what would take to fit them on the car

Mahjik

iTrader: (1)

IMO, you'll be better off in the end going with something like the Pettit Racing Big Brake kit:

http://www.pettitracing.com/rx7/index_brakes.htm

Basically, if you have to ask how to make a custom kit, then it's probably not something you should attempt. If you want to see what the old Mov-it kit was, you can check this old link (they had an FD application):

http://web.archive.org/web/199902191.../bigbrake.html

3rdgenguy

iTrader: (1)

Basically, if you have to ask how to make a custom kit, then it's probably not something you should attempt.


i hate this line if he never does it how is he going to learn it not the easy mod like intake or a muffler but it can be done by anyone

Mahjik

iTrader: (1)

How does he learn? Research, not asking for a how-to... If you don't research, how do you know the info being provided is correct?

R-R-Rx7

iTrader: (24)

seriously???? why dont you build an airplane too.. you will learn in the process. its slightly harder than intake or a muffler but it sure can be done by anyone .....

serbRX7

iTrader: (9)

i did not know anything about rotaries when i got my rx7...and i managed to build single gt35r turbo rx7 and do all the mods just with some help and direction from people on the forum...

now i am in beginning stages in building turbo carburetter 13b race car for my club...

and i am i guy who did not know anything about this car just a year ago.... so information helps...i always thought this website is for member support and not bashing on other member...

i lost the link to the page that had some good info on big reds and i cant find it...
i did not ask for complete how to...i was just hoping some one might have the link
================================================== ========
Mahjik....helped me number of times with my questions so i appropriate his opinion

Pettit Racing Big Brake kit sounds good to me

i came across big reds for cheap fresh rebuild 400$ so i had to ask

Mahjik

iTrader: (1)

serbRX7,

As mentioned, it is possible. You start with the rotor that you plan to use. Mount it (which may require some filing/machining depending on the rotor). Then you get your caliper and test where it needs to go to fit the rotor you are using. After that, you fabricate a bracket to mate the caliper from your test location to the existing caliper mounts.

However, the problem you'll run into after the mounting is whether you have proper brake bias for the car (i.e. do you now have too much front brake since you've relocated the caliper which will increase brake torque and a different pad size?). This can be overcome by also changing the rear brakes but a lot of the times this ends up loosing the parking brake which in most states, will make your car non-compliant with public road regulations. You could also use adjustable proportioning valves to help adjust the bias but then again, that's more custom work (but doable). In most cases with large brakes like the Porsche ones, you usually end up also changing out the master cylinder to get more pressure.

Just throwing different calipers on the car can do more harm than good without testing and investigation. This is why I would suggest going with something that has already had that testing done. The Pettit Big Brake kit can even fit on the 16" stock rims (which can help if you want to track the car with a smaller diameter wheel). If/when I go with a BBK, the Pettit will be my choice as I've seen it in action for many years at the track on a friends car.

I'm not suggesting you are incapable of making Porsche brakes work. I just don't think you've done enough research yet on brakes to tackle the project.

Miata_mx5

What will you be using the brakes for?

serbRX7

iTrader: (9)

i know that i might need to switch to 929 Master Cylinder and use adjustable proportioning valves...

but i just found one of the member here on rxclub use them with all oem parts and stock lines with no problems...

link to the thread if any one els is interested...https://www.rx7club.com/suspension-wheels-tires-brakes-20/turbo-porsche-cayenne-brakes-fd-792545/

its mostly the look thats puling me to using this....but if its not cost efficient i wont do it and i will go with pettit kit...

still searching

serbRX7

iTrader: (9)

i just need something that will stop me from 150mph to 0 fast

ptrhahn

iTrader: (9)

The smart thing to do, if you can locate the info, is replicate the Mov'It kit... it was a well engineered setup, but I think there were lots of Porsche calipers that were painted red that weren't necessarily the "Big Reds" used in the kit, and may have different piston sizes, etc.

Good luck, but be careful. Fritz raves about the Mov'It setup, so it'll be great if you pull it off, but brakes are something that you want first and foremost to WORK reliably, and right off the bat.

If you've any question marks, you'd be well served to pick up a kit like a StopTech that bolts on, requires nothing else, works, and costs less than $2k.

Mahjik

iTrader: (1)

His mechanic did what I said above:

ptrhahn

iTrader: (9)

Just once?

The stock brakes are actually pretty good brakes—big brakes are really for track use where the bigger rotors last longer under repetitive high speed stopping and high heat.

Mahjik

iTrader: (1)

That's not necessarily what BBK's will do. BBK's are to increase surface area of the brakes to help absorb and bleed off more heat. In some cases they might provide better brake torque due to the location of the caliper, but not in all cases. If you want to stop quicker, you need stickier tires. If you want to hold off brake fade from heat build up, that's what BBK's are for...

serbRX7

iTrader: (9)

yes and you are right

scrapp

iTrader: (1)

I have a friend who has made the required adapter needed to use the porsche brakes you speak of. (we are talking nice CNC machine style adapter.)

(he did it to an FC, and a few volvos.)


For more info in hopes to get what you want done, PM ajhehr. Tell him I sent you.

serbRX7

iTrader: (9)

i am ok with barks performing as stock ones would in street driving or lil bit better would be expected ...

i really need them to start performing when i start getting on the car,when breaks start getting hot... i am not doing this for casual driving...

i like to do toge it the most nerve racking and fun i really need the car to stop there ...i am trying to get set up for this years auto-cross event coming up in September and track day at Watkins Glen International...

so far my breaks even with ticker brembo crosdriled and slotted rotors do not do a good enough job...

i can replicate the brackets if i can get my hand on a set...

so far this just looks more trouble then it worth... i guess i am left with experimenting with different pads and saving up for bbk from pettit

serbRX7

iTrader: (9)

o cool just when i was about to give up

scrapp

iTrader: (1)

Really. he is a nice guy... And there DOES HAPPEN to be a FD in the shop right now... He can make anything you want, he just needs the car. (so yea, just say hello... Maybe he can get you a few made up while the FD is still in the shop.)

serbRX7

iTrader: (9)

i managed to find some pic... ok this is how the bracket would look like for FD



i sill cant find what kind of rotor they use with this calipers

3rdgenguy

iTrader: (1)

your right there is lot's info on braking on here but always nice to point him in the right direction is all rather then tell him to give up. anyway you have lot's of good info mshjik like reading your post's looks like he got his info on it. one thing is run some real tires up frount like a 265 or so will help your braking a lot.

serbRX7

iTrader: (9)

i run 255/40 Yokohama tire on 17x10 5zigen rims all around

1QWIK7

iTrader: (33)

Damn 150-0???

What sort of abuse are you doing to your car to make you need big brakes for a 150-0 test?? lol

serbRX7

iTrader: (9)

150 i dot that on the highway...only reason i let of at 150 is because it takes me to long to slow down...

some times i am relay abusive on the car just today i managed to break the clutch racing

and i have test and tune tomorrow so i am mad as hell...

i do drive like a grandma around town....but this is a sports car i need to ope it up clean out that carbon buildup some time...