Lotus Elan

Correct Brake Lines ???

PostPost by: Galwaylotus » Thu Mar 01, 2012 10:02 pm

I've always heard that, while small, there's a bit more swelling under pressure in a steel-braided hose than in a solid pipe and therefore flexible hose should be kept to a minimum in brake circuits. I never heard or tried to calculate the extra "give" but I want the system to have as firm a pedal as possible.
Mechanical Engineer, happily retired!

'67 S3 SE FHC

See Facebook page: W J Barry Photography

Put your money where your mouse is, click on "Support LotusElan.net" below.
User avatar
Galwaylotus
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1357
Joined: 01 May 2006
Location: Galway, Ireland

PostPost by: garyeanderson » Thu Mar 01, 2012 10:06 pm

Galwaylotus wrote:I've always heard that, while small, there's a bit more swelling under pressure in a steel-braided hose than in a solid pipe and therefore flexible hose should be kept to a minimum in brake circuits. I never heard or tried to calculate the extra "give" but I want the system to have as firm a pedal as possible.


I agree (thats a switch huh), not the way I would go in any event but I am a person that still likes the .7 or .625 single master cylinder.

Gary
User avatar
garyeanderson
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 3128
Joined: 12 Sep 2003
Location: Massachusetts, U.S.A.

PostPost by: Famous Frank » Sat Mar 03, 2012 11:43 am

I agree too, except for the fact my white Elan had a terrific feeling pedal! You may have noticed in the pic, the stainless rod attached to the front upright coming from the firewall. Carl Grabowski fabricated a stainless firewall cover (you can see that in the pic also), and then fabricated the rod from the firewall to the upright. That way under hard braking there was no movement from the firewall. And when you pushed on the pedal, it was very firm and gave a very secure feeling. I believe the MC was .70 also with no servo.

I'd like to do it again on this car but I'm running out of time before Tampa in October.

Famous Frank
Famous Frank

66 Elan S2 SE
65 Elan S2
66 Elan 26R
69 S2 Europa
06 Elise
67 Barracuda
User avatar
Famous Frank
Fourth Gear
Fourth Gear
 
Posts: 729
Joined: 29 Apr 2004
Location: Atlanta, Georgia USA

PostPost by: [email protected] » Sat Mar 03, 2012 8:21 pm

Other than the master cylinder/clutch plumbing I agree with the notion that the brake system should use hardlines everywhere but at the suspension to chassis points. As far as getting away from the silly bubble flares you can email me and I'll give you a parts list. It's basically just 7 AN-3 male/male adapters (3/8-24) and crush washers on your car. The clutch can use a teflon lined/braided steel hose and in that case it's neater to use a 90 degree end with a banjo at the master to create a line that does a 180 turn like the original Girling red plastic thingie at the master. I always cover it with shrink fit if I am making my own custom hose or the ones we have in stock are covered and assembled.
[email protected]
Third Gear
Third Gear
 
Posts: 268
Joined: 29 Sep 2003
Previous

Total Online:

Users browsing this forum: nmauduit and 13 guests