slotted vs cross drilled

736 Views 18 Replies 11 Participants Last post by adoboboy, Jan 27, 2006

pte.240

Discussion Starter · Jan 23, 2006

well the name says it all... the very fist upgrade im doing to my 240 is brakes and i want to know your opinion on the 2 different options... or getting both.

1 - 19 of 19 Posts

TomTomTuning

· #2 · Jan 23, 2006

Drill- crack.. so i heard..

But really.. do you think Ferrari would put drilled/slotted rotors on there cars if they weren’t good)

Just get Sllotted.. or just blanks are fine..

gtp420

· #3 · Jan 23, 2006

It kinda depends.I think all you need is slotted. If its a good drilled rotor then the hole should be cast in to the rotor , the cheaper ones are drilled out. The problem with cross drilled rotors is that they crack.

Expunge

· #4 · Jan 23, 2006

Slotted.

delion85

· #5 · Jan 23, 2006

sr240dett3 said:
Drill- crack

I second this, it happened to my cross-drilled and slotted rotors, if you looks close enough, you could see some hairline stress cracks. I like the look of cross drilled and slotted, but when the time comes to buy another set, im just going with slotted.

G

· #6 · Jan 23, 2006

slotted. but on the 240, the only slotted or cross drilled rotors you're going to find were made that way at a machine shop after the rotor was cast. just get brembo blanks, you'll be fine.

Joel 180

· #7 · Jan 23, 2006

it depends on how they are made, if you post drill rotors they are prone to cracking but if they are drilled during manufacture they last a bit longer.

big rotors > slotted > cross drill

Slotted help stop pad glazing which is good for racing though

Alch

· #8 · Jan 23, 2006

gtp420 said:
It kinda depends.I think all you need is slotted. If its a good drilled rotor then the hole should be cast in to the rotor , the cheaper ones are drilled out. The problem with cross drilled rotors is that they crack.

Uh, wrong. The only rotors that have holes casted into them are the (this is where I can't rember) I believe it was the ceramic rotors for porsches. Normal rotors are drilled.

Again if it's done correctly cross drilled rotors function just fine, but are known to crack. However, with newer pads slotting and cross drilling isn't even necessary. So, both are more for looks than anything else.

I have slotted and cross drilled on all four corners simply because of cost. I did a 5 lug swap along with 26mm 300zx brakes in the front. Finding oem blanks in that sized turned out to be slightly difficult. Brembo only made the 30mm rotor (and when i found the rotor I needed it was expensive). So ebay sold me front Z rotors for cheap and the rear rotors i got that were slotted and cross drilled (again, I just did a 5 lug conversion in the back, no z brakes) were just cheaper than getting blanks. I figure that if/when i start to see cracks in my rotors I'll just spend the money and make sure I get some zinc coated ones that won't rust nearly as much and at most I'll just get slotted ones.

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pte.240

Discussion Starter · #9 · Jan 23, 2006

yeah i was lookin at the brembo Gran Turismo Brake Systems yeah dont laugh i have the cash they are around 3 grand and i have always been go big or go home and i have an auto X that my uncle is in and he is 10th in the province and i would like to compete with him.

G

· #10 · Jan 23, 2006

pte.240 said:
yeah i was lookin at the brembo Gran Turismo Brake Systems yeah dont laugh i have the cash they are around 3 grand and i have always been go big or go home and i have an auto X that my uncle is in and he is 10th in the province and i would like to compete with him.

sorry, you're 18 years old. you're a dreamer.

you also don't need that kind of braking power to "compete"... z32 brakes would be more than enough to stop however much force you can exert from whatever's powering your 240.

gtp420

· #11 · Jan 23, 2006

Uh right, like i said cheap rotors are drilled / some slotted rotors are milled out.

pte.240

Discussion Starter · #12 · Jan 23, 2006

can you make slotted brakes out of a z32 disk?

gtp420

· #13 · Jan 23, 2006

hell ya it would be cake, All you have to do is mill them.

pte.240

Discussion Starter · #14 · Jan 23, 2006

ohh ha never knew it was that easy...

gtp420

· #15 · Jan 23, 2006

well iv worked in a machine shop since i was like 13 or so. Plus my dads bin doin it for 48 years. lol

LukeDogg316

· #16 · Jan 23, 2006

I heard Drill rotters crack, too many wholes

Slotted eat up pads fast. too many gaps

Cross drilled and slotted is a good combo at little of both

Blanks are also good

wrekls

· #17 · Jan 27, 2006

i had some brembo drilled and slotted on my crx and 3 out of 4 rotors had holes that cracked so next time i am going to get slotted

tuner1014

· #18 · Jan 27, 2006

cross drilled is pointless. they say it helps gasses escape, but so do slotted. some may argue it saves unspring weight, but you sacrifice like 1lb for the durability of your rotors. crossdrilled eats your pads far more than slotted. just look at all the jgtc cars and circuit cars. they seem to have either blank or slotted.

adoboboy

· #19 · Jan 27, 2006

Just to add in...if you want to resurface your rotors because they're warped...you can't do it on a X-drilled or slotted..at least that's what I was told. I specifically went with Brembo blanks for my Z brakes mostly for the reliability and sleeper look.

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