Armand, I also installed disc's on the front of my 70 Jav but I did not put in a prop. valve. I was advised at the time I did not need it. The disc's are better then the drums were but I also have a 68 AMX with factory disc's and it stops a ton better and faster then the Javelin does now. It just seems to be kind of a soft pedal if you know what I mean. Just seems like you have to push for a bit before they start to grab. I have ok vacuum like 13 - 15lbs so it seems like that isn't the problem but do you know of any thing else that may help or does it sound like I need a prop. valve. I know it just balances the system so I don't think that is the problem. The other thing I was considering is a vacuum tank? Thanks Keith 55 Chevy Gasser 68 AMX 70 Javelin On Oct 25, 2007, at 9:51 AM, Armand Eshleman wrote: > Feltonik (real name?), > > Welcome to the list. I hope your experiences here will be as great > as mine. > > I have personal experience with this on my 70 Javelin. I converted > it to > front disc brakes from drums all around. > In 1970 model AMX and Javelins the factory installed a > proportioning valve > on the inside of the passenger > frame rail in front of the rear axle for disc brake equipped cars. The > proportioning valve is not installed on the all > drum setups. Since my car did not have the regulator I simply > purchased one > from Summit > http://store.summitracing.com/partdetail.asp? > autofilter=1&part=SUM2DG3905&N=700+4294922533+4294918719 > +115&autoview=sku > > As I was replacing all the nasty looking brake lines I installed > the valve > in the factory location by fabricating a simple > bracket. I then bleed the system, bedded in the new pads, etcetera, > and > adjusted the valve until things were satisfactory. > > May I also mention that my disc brakes came from a 75 Hornet. I > purchased a > new master cylinder from NAPA for the > Hornet and installed it in my Javelin. The drum master cylinder > from your 70 > AMX may not be adequate to operate the > disc brakes. > > Armand > > > > ----- Original Message ----- > From: <feltonjk@xxxxxxx> > To: <amc-list@xxxxxxxxxxxx> > Sent: Wednesday, October 24, 2007 4:20 PM > Subject: [Amc-list] Proportioning Valve > > >> I am new to the list so forgive me if this subject has been addressed > already.? I am converting a 70 AMX from drum all the way around to > front > disc.? I have everything I need except the proportioning valve.? I > have?been > told everything from I don't need one, to buy an adjustable one > (but get a > brake professional to adjust it), to use the GM valve that was used on > vehicles such as the 70 Impala.? Any suggestions? >> >> >> _____________________________________________________________________ >> ___ >> Email and AIM finally together. You've gotta check out free AOL >> Mail! - > http://mail.aol.com >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: > http://www.amc-list.com/pipermail/amc-list/attachments/20071024/ > e5b511a7/attachment.htm >> _______________________________________________ >> Amc-list mailing list >> Amc-list@xxxxxxxxxxxx >> http://www.amc-list.com/mailman/listinfo/amc-list >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.5.488 / Virus Database: 269.15.6/1086 - Release Date: >> 10/22/07 > 7:57 PM >> >> > > _______________________________________________ > Amc-list mailing list > Amc-list@xxxxxxxxxxxx > http://www.amc-list.com/mailman/listinfo/amc-list > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.amc-list.com/pipermail/amc-list/attachments/20071025/e50b7288/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list