[Brake Fluid swap?]

I have been using Dot 3 Synthetic .....

http://www.valvoline.com/pages/products/pr....asp?product=51

SynPower High Performance Synthetic Brake Fluid is recommended for ABS, hydraulic drum and disc braking systems and hydraulic clutches requiring DOT 3 and DOT 4 fluids. Its premium, synthetic, low-moisture formulation provides superior anti-vapor lock protection. It has a high dry-boiling point up to 500°F that reduces the risk of fluid vaporization and possible brake failure.

*Exceeds DOT 3 and DOT 4 specifications

*For most ABS, disc or drum brake systems

*High boiling point reduces risk of brake failure

*Compatible with conventional brake fluids

Tom

I was reading a post on the stude site about brake fluid posted the other day about the guy with the steeltech conversion and low brake pedal. Mine is a 79 and the owners manual still called for silicone fluid. How do you know when the line is clear. Simply looking in the reservoir for cloudyness???? I saw the line had to be dried. Is this still applicable with a silicone based fluid??

[Possible rim sizes for avanti II]

You should be able to run up to a 4.5 inch backspacing without clearance

issues. I am running 17 x 8 with a 5.02 back spacing, but my Cobra brake

setup uses the rotor as a spacer giving me 4.75 backspacing. Its still not

enough, and I get rim contact on the upper front threaded bushing. I am

looking into an adjustable steering stop to solve that, I could also use a

1/4 spacer, the studs I used in my modified hubs are long enough.

Tom

Thank you both for your infomation. Its seems that the 4.25 backspace works fine as I have no clearance issues. 17 inch rims would have been much nicer!!!!

[Brake Fluid swap?]

Thought I might ask one more question about brake fluid. After fixing up the avanti, the rear driver wheel would lock up so I replaced the wheel cylinders as they were leaking. After doing this I bleed all the lines out but instead of using dot 5, I used dot 4. I don't like dot 5 becuase one its expensive and two bubbles seem to get in it so easy. I have read different opinions on this swap. One being its dangerous as the seals will deteriorate very quickly and cause brake failure to its fine as long as you flush out the line completly. Most of the postings though are of motorcycle conversions from dot 5 to dot 4. I still have the original bendix master on the car. I did the swap and it seems to work much better than before (easier pedal, less spongyness) but I don;t want to put myself in a dangerous situation.

[Possible rim sizes for avanti II]

Hello, this is my first posting as I recently fixed up my dads 79 avanti II and was wondering possible rim combinations. I measured my stock steel rims and they are 15x6 with a 4" backspace. I am interested in the Magnum 500's on the internet but they are 15x7 with a 4"25 back spacing. Will this combination work or will I get any rubbing on a full lock turn. Any help would be appreciated as I am having trouble finding any tech information on this car. Thank you