vwman
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Posts: 133
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« on: November 13, 2010, 09:41:23 pm » |
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I have had the type 3 brakes on my bug for years but I got a good scare today. I made an emergency stop, at a stop light and the 145's locked up and I nearly slid into the intersection.
Here's the set up, disc's up front (karmann ghia), 145 tires and type 3 rears out back (type 3 wheel cylinders) 205/65/15 tires.
Of course today was very cool 50 degrees, so the tires had little if any bite.
What's everyone else doing to compensate for the pressure differences in the brake lines (disc fronts), type 3 drums in the rear? Adjustable proportioning valve? Super beetle wheel cylinders?
Or has anybody starting running the wider tires (195/50/15's)up front?
Any thoughts?
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gkeeton@zbzoom.net
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« Reply #1 on: November 13, 2010, 10:55:55 pm » |
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It's the nature of the beast. I had some jackass run me into the median turning lane, just today, and had to make a panic stop. 145 front's with drum brakes lock up easier than the back one's too. Type 3 wheel cylinders are 22mm I think, the Superbeetle ones are 23.5, so yeah, maybe you could try them. Disc brakes make things worse, so maybe you could try the SB wheel cylinders on the rear, and a proportioning valve to lessen the pressure to the front.
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fifty-five
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Posts: 218
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« Reply #2 on: November 13, 2010, 11:32:44 pm » |
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175/55 up front for me, haven't locked em up yet. Still got drums tho. I've got them on 5.5 wheels and they fit perfect, I would say they be good on 5's too.
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« Last Edit: November 13, 2010, 11:34:37 pm by fifty-five »
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1955 Ragtop
2276 under the deck turbo
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Glenn
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« Reply #3 on: November 13, 2010, 11:39:22 pm » |
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I've run Ghia front disc and T3 rears with 195/60-15 tires all around, but I have a Beetle.
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Bruce Amacker
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« Reply #4 on: November 13, 2010, 11:39:50 pm » |
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I also have T3s on the rear of my Ghia for over a year now with no lockup problems. An adjustable proportioning valve would probably be the best choice from an engineering standpoint, but it seems most VW wheel cyls interchange even though the bores are different size. I used to swap whlcyls around regularly on sandrails I built to get brake action even from front to back, you might consider some smaller wheel cylinders in the back.
Good Luck!
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'69 Ghia, bone stock and body-off restored.
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vwman
Junior
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Posts: 133
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« Reply #5 on: November 15, 2010, 07:41:36 pm » |
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Thanks all!
This forum is the best!!!
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kaferdave
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« Reply #6 on: November 16, 2010, 11:25:24 am » |
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I have Type 3 in the rear, and SoCal Imports discs in front.
145-15 front
205-70-15 rear
I used an adjustable proportioning valve from Speedway.
Took a few lockups and skids to get it right, but it have saved the front of my car more than once...
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