line lock ?

stock1080 · 09-30-2021, 08:44 AM

I have a street/strip car. It has a brake pressure relief valve. To install a line lock, before or after the valve? Does it matter? thanks

Rory McNeil · 10-03-2021, 09:00 AM

Are you refering to the factory installed brake distribution block/ proportioning valve usually mounted between the master cylinder and the lines to the wheels? In the past, I have installed several line lok solenoids between the master cylinder and the factory brake distribution/proportioning valve, worked fine, never had any issues. However, a number of years ago, NHRA added a condition in the rule book, that stated any brake solenoids were to be mounted AFTER the valve, before that, there was no mention of allowable locations. I have to assume, that somebody somewhere, must have had the valve stick, causing a crash or front tires not releasing, to make this an issue. So, ever since, I did the extra plumbing to mount the solenoid after the valve, but I personally never noticed any difference in how the Line Lok functioned, either way.

stock1080 · 10-08-2021, 08:26 AM

outstanding, thank you very much jeff

09-30-2021, 08:44 AM	#1
stock1080 Member Join Date: Dec 2002 Location: malden,ma Posts: 241 Likes: 246 Liked 92 Times in 38 Posts	line lock ? I have a street/strip car. It has a brake pressure relief valve. To install a line lock, before or after the valve? Does it matter? thanks

10-03-2021, 09:00 AM	#2
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,272 Likes: 263 Liked 994 Times in 274 Posts	Re: line lock ? Are you refering to the factory installed brake distribution block/ proportioning valve usually mounted between the master cylinder and the lines to the wheels? In the past, I have installed several line lok solenoids between the master cylinder and the factory brake distribution/proportioning valve, worked fine, never had any issues. However, a number of years ago, NHRA added a condition in the rule book, that stated any brake solenoids were to be mounted AFTER the valve, before that, there was no mention of allowable locations. I have to assume, that somebody somewhere, must have had the valve stick, causing a crash or front tires not releasing, to make this an issue. So, ever since, I did the extra plumbing to mount the solenoid after the valve, but I personally never noticed any difference in how the Line Lok functioned, either way. __________________ NHRA 6390 STK M/S 85 Mustang

10-08-2021, 08:26 AM	#3
stock1080 Member Join Date: Dec 2002 Location: malden,ma Posts: 241 Likes: 246 Liked 92 Times in 38 Posts	Re: line lock ? outstanding, thank you very much jeff