Toymods Car Club Inc: Tech & Conversions => 5 stud conv. for MA61 - so I can get some decent mags !!!!! Now MA61 BBK :-)

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bbaacchhyy
Forums Junkie

Location:
Adelaide
Registered:
September 2003

Re: 5 stud conv. for MA61 - so I can get some decent mags !!!!! Now MA61 BBK :-)

Thu, 23 September 2004 21:53

ed_ma61 wrote on Thu, 23 September 2004 23:59

anyway - michael, ive been reviewing your photos of the clearance with the lower control arm and the ball joint under the control arm. sure, its AWEFULLY toight before machining, but it does still appear to clear everything (albiet *just*). true/false?

with my setup, im down to the mm in terms of clearances, so cant afford to wipe 7mm off the hub, maybe 2 or 3mm. also, the oem rotors dont look like theyll allow machining out to 216mm, more like 202-205mm. reckon i can get away with minimal machining, or are there serious fouling issues that im not aware of?

Ed,

When I fitted the unmodified discs to the unmodified hubs, in certain positions it clearde, but with the suspension on a fair bit of compression (not just ride height) it giot very close in the straight ahead position, but the fouling issue with the LCA was mainly heading towards full lock in either direction.

Also heading to lock, started to touch the ball joint as well, which lead me to machine the ID of the disc as well as the face of the hub.

The vanes on the inside of the disc were a good guide (the depth of the Skyline pad is not as great as the ST205 Calipers, so running out of friction face was not an issue), and the depth that was removed from the hub face was based on grip length remiaining for the disc attachment bolts compared to the std hub.

To check out your clearances, do it with teh setup all attached and then compress the suspension (no spring fitted) to varios stages and run from full lock in one direction to another and keep checking that way.

Even with what I have taken off, it gets pretty close. It seems taht it is the inclination of the strut that alters the clearance as the strut pivots on the lower ball joint.

Phew.....

BTW, where did you get the calipers ? Ideally, I'd like to get calipers that give a bigger disc contact area than the skylines, but that is what I had. What are the pad dimensions of the ST205 calipers ?

As for the hub centric spacer, not sure why you are measuring the Falcon spigots ? The Crown hub spigot is 68mm, and the Falcon mags have a spigot OD of 71mm (in the mag), so the centric rings that I have had machined are 70.95 +/- 0.05mm on the OD, and 67.95 +/- 0.05mm on the ID, and they are as snug as.

As a guide, the disc location hole on the Commodore rear has a tolerance of 0,05mm overall.

Cheers

Michael B

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