ae86 gt-r big brake upgrade

[greenmachine]

this is my project brakes issue.
i have used
s13 spindle
s13 hub
gtr caliper
gtr 296mm/1.25inch thick rotor
7075 t6 aluminum block
15inch te37v 9.5j -20offset
subaru legacy shocks(tein flex full tap) with edfc
ae86 camber top
gtr brake lines
r32 master cylinder

i have cut the tierod connection from the s13.
flattened the s13 control arm mount bolt.
transefered same distance of holes from ae86 bottom strut mount bolt to s13 spindle.
drilled holes to spindle with 12mX1.25 tread pattern.
install spindle to ae86 control arm/tierod plate
install shocks
adjust ride height
adjust damper
align car
install brakes
bleed brakes.
drive car.
keep in mind. this took me at least five days to grind down 1 spindle. drill press, is an a must have to drill out the hole on the s13 spindle with the same hole size of the ae86 bottom shock strut mounts.

i did not weld on anything.
max spending
10,000 yen for tools.
pick up parts from friends"I CAN'T USE THIS PART ANYMORE" locker.
questions. let me know what you guys think.

[greenmachine]

[Rex_Kelway]

Seems like a lot of unnecessary work for a somewhat messy and potentially innacurate result. Sorry but thats just the opinion of Rex, no offence. Well done for going a bit of DIY effort though.

Usually Lads just modify the lower arm and use complete S13 gear.

Personally, Rex just made an adaptor to fit any of the S13 (NA or turbo), R32/33/34, Z32 or GTR brakes directly to the original AE86 strut. Never even considered your method...

[fixeruperer]

or just use a *A6* strut and bolt them on.

[beerhead]

*A6* strut in AE86/KE70 chassis is blasphemy, the king pin angle is completely wrong and the car will never handle the same again.

[fixeruperer]

its not that bad, with sigma arms.... , either way my wheel alignment says its all good ?

[beerhead]

I've never seen a wheel alignment readout that included ankerman effect. Remember the *A6* chassis has the same length LCA's as a KE and the strut tops are closer together. *A6* gear in a corolla is akin to shooting JFK IMO.

[fixeruperer]

so what problems would be generated from this poor king pin angle ?

[beerhead]

Understeer mate! The change of ankerman causes less contact area of the tyre on the road at wide lock angles causing the car to loose precision at speed.

[fixeruperer]

its ackermann.

maybe the difference isnt that bad with this setup ? i have a full spool rear , so its gonna understeer before it over steers anyway haha.

tell you the truth, ive never felt a problem with mine.

[beerhead]

If you haven't noticed anything it means my mum would spank you at a track day

[fixeruperer]

i dont doubt that.

[beerhead]

Lol's she is actually a really good driver, don't tell her I said that though :

[greenmachine]

I TOUGE'd it in road 139 last night. it works really good. i let our (japanese)mechanic/time attack driver and asked his opinion about this conversion. his answer was"WHY DID NOT HE THOUGHT ABOUT THIS IDEA". He gave me a thumbs up and likes the car handled in the mountain. using the edfc made it a lot easier to tune the suspension.

[Billzilla]

Seems like a lot of work to fit brakes that are too heavy and bigger than what you'd ever need.

FWIW what I have on the front of mine ...

RAV4 front discs & Wilwood calipers.


Milled up a backing plate.


The whole lot doesn't weigh a great deal more than the standard setup.