BklynRX7

hey, I am new to the site and hope this is in the correct forum. i just have a few questions regarding my suspension as I am in the process of completely overhauling it. I have an '86 base body with 4 lug suspension. I am swapping the 4 lug hubs with 5 lug hubs and 4 piston calipers. I do not have 5 lug rotors so I am buying aftermarket drilled/slotted. I was always under the impression that brembos were top of the line but I see most people here listing racing beat or other company's . So what do you guys recommend?
second of all I have a set of fd rims I am putting on it. I know for a fact that i need spacers in the front or they will rub through. Does anyone know how big a set of spacers ill need? Should I also put the same spacers in the rear just to even things out? I just changed my stock suspension for kyb non sdjustables and eibach pro-kit springs. i know its not the best but i have 3 of each set lying around so i figured id use them.

I dont know how to change my name which i regret now or edit my signature so im just gonna list my cars stats here , to let you guys know whats up...
'86 base automatic converted to 5spd
'91 s5 n/a engine completely rebuilt with all new housings
(so recent its still in the shop www.rx7s.com )
s5 bumper and tailights
weight reduction:
no a/c, p/s, pollution equipment
2.5" exaust with presilencer and no cat
act stage 3 clutch kit
air sensor mod
currently building custom cai with help of instructions in archives and fc3s.org
weapon r dragon filter with RAM air kit

bingoboy

http://www.fc3spro.com/TECH/MODS/RT/fdfit.htm for your question about the FD rims.

as for rotors, the Brembos will do you just fine.

Snrub

iTrader: (1)

You don't need aftermarket drilled/slotted rotors, they won't do anything for you. Any standard rotors are what you want.

For signature click the "User/CP" button near the top of the page. Then on the left side there should be an option to click "Edit" signature.

BklynRX7

Are you sure about the rotors? I have heard form a million peopel and sources that drilled slotted dissapates heat alot better therefore gripping better and not fading as fast. It makes sense to em as well and I have seen this proven on other cars. im gonna go with the brembos.

JDUBrx7

You drive a N/A rx7. Like myself. You dont need the 4 piston calipers, You dont need brembo slootted and drilled rotors. Anyway. moving along.

ilike2eatricers

Our cars dont NEED alot of things... but we still want them. I think upgrading to 4 piston calipers is a good mod.

ion_four

I don't mean to thread-jack (on my first post!), but I figure this isn't worth it's own thread, since it's probably common knowledge. Besides, if I EAT CIVICS has the stock wheels, he might like to know, too

Which models had the 4 piston calipers? I'm wondering because I pulled some from a wrecking yard, for another car, and wonder if they will fit under 15" wheels. Found this in the FAQ, but I'm not sure what model the brakes are from:
"
What size are my wheels?
The stock sizes all have an offset of 40mm or 40 ET and are:
14x6 w/ 114.3x4 bolt pattern (Base, Luxury, 87.5-88 SE)
15x6 w/ 114.3x5 bolt pattern (GXL, Sport, GTU, 91 coupe)
15x6.5 w/ 114.3x5 bolt pattern (convertible)
16x7 w/ 114.3x5 bolt pattern (Turbo, GTUs, Infini IV)
"

bingoboy

Brembo makes blanks (non slotted/non drilled rotors) and shops will CNC the drill/slots into them (at least i'm pretty sure it's done like this). the brembo blanks are often available at not much more expense than any other rotors. without back to back tests between blank and drilled/slotted, there will never be a definitive answer on which is better. they will absorb less heat due to having substantially less material and quite a few people road race/track their 7's just fine with plain old rotors, and have had drilled/slotted crack under heavy use

as for 4 piston brakes, i loved what they did for my car. with better tires, the braking is even more awesome. i started with the single piston fronts and rebuilt t2 calipers for the fronts and the swap was fairly easy.

bingoboy

You will find 4 piston Calipers on any 5-lug that is NOT a base model. T2's, verts, and GXL's will have them, as well as the 88 GTU and the 89+ GTUS. Not sure on the Sport, someone else can clarify that .

ion_four

Awesome, so just to be crystal clear, heh...they fit under the 15x6" and 15x6.5"? Nice.

Snrub

iTrader: (1)

Slotted and/or drilled rotors aren't going to do anything for you on the street. Also, please read my testimonial regarding the stock 4 piston calipers and brake fade. http://www.geocities.com/jeffguilfoil/brakes.html

bingoboy

yep they fit fine and dandy.

87base RX-7

if u have a choice of drilled and slotted id get sloted. drilled are prone to cracking and messing up ur braking system when under reapeated hard breaking and tempature changes. but ive never seen a slotted rotor crack. and there is a study somwhere on this site where sombody showed that slotted rotors work alot better at keeping the brakes cool whereas drilled made virtually no differance. (do a search drilled vs. sloted brakes or somtin like that). and in response to not needing better brakes i get brake fade alot on back roads and such so im definatly looking into a 5 lug swap for the better brakes. though if u just drive in a strait line and dont attack the curves u might not need better brakes then what our cars have.

ilike2eatricers

Awesome thread by DamonB in the suspension/wheels/tires forum concerning slotted vs. drilled rotors. https://www.rx7club.com/showthread.p...lotted+drilled

bingoboy

go look for silkworms post w/pics of his slotted rotors cracked all over the place after a day at the track.

RacerJason

iTrader: (5)

Well they must have been crap to start with or they were overworked. Cross-drilled is mere cosmetics and fractional weight savings. Gas-Slotted is the first and best choice, solid discs second. Read my post in that accompanying thread for more information also.

alphaxxn

You don't usually want to get them drilled this way, espescially with Brembo. The Brembo crossdrilled rotors ( the real ones, not the ebay special "brembo ones" are actually manufactured drilled, and not drilled as an afterthought. This does not compromise structural strength as opposed to drilling afterwards. Also on a street car, unless your riding your brakes constantly, you typically do not need to worry about brake fade. I could see worrying about it in a NASA or SCCA event, but not on the street.

Also, before you think about not using solid blanks then read up on the disadvantages. Typically slotted or crossdrilled rotors will tend to warp quicker.