If you are considering a 1LE or Baer Brake Upgrade...Call Guldstrand

[ebmiller88]

Sorry it's taken so long to get back to you, Andy. I don't see different P/Ns for either a production or service proportioning valve (P/V) for the 88 year in the manual. It lists only "86-88 F J65.....14089497". However, if you look further down the list to the 1LE specific items, it lists P/N 10136840. That may cross reference to 14089496, I'm not sure. All these numbers are making me dizzy. Now I just realized I have a mistake with my numbers. Also, in there somewhere should be: 89 J65, 1LE(1st Design)...14089496. I hope that is what you were looking for. I take it the first design also included the 88 year model, although it was not listed. I hope this cleared things up a bit. I also think the 18014286 M/C, 14089496 P/V combination is the way to go for the proper 1LE setup. Thus sayeth GM..

[Apeiron]

<font face="Verdana, Arial" size="2">Originally posted by ebmiller88:
I thought it came out in 88, but the manual lists "89 J65, 1LE 2ND Design.." and then lists " So where's the FIRST design?? I'm confused.</font>

Brake lines were changed mid-89 from M1.0 to M1.5 flare threads. The M1.0 lines are the first design and the M1.5 lines are the second.

[ANDYZ28]

For me, and my "rubber on the road" testing. The standard J-50 master cyl., and 14089496 proporioning valve is the perfect set up. I am now the proud (?) owner of some 4 flat spotted tires that prove that point.
Thanks ed.

[Apeiron]

I just came across this today, and thought it might shed some light on the reasons for the various M/C sizes for those swapping disc and drum rears, or doing the 1LE conversion:

Number: 84-88

Section: 5 (V)

Date: Mar., 1984
Subject: REDUCING BRAKE PEDAL EFFORT ON CAMAROS WITH FOUR WHEEL DISC BRAKES

Model and Year: ALL 1982-84 CAMAROS
TO: ALL CHEVROLET DEALERS


The higher brake pedal effort associated with 1982-84 Camaro cars equipped with four wheel disc brakes may be a source of some customer comments. The J65 brake system was designed with a low pedal ratio for reduced free travel and a firmer and higher effort pedal for the high performance buyer. Owners of J65 equipped Camaro cars not sharing this interest and desiring reduced brake pedal effort can be accommodated by replacing the original production master cylinder assembly with the appropriate J50 master cylinder unit specified below.

<TABLE BORDER=1><TR><TD>MODEL YEAR</TD><TD>ORIGINAL J65 MASTER CYLINDER</TD><TD>REPLACEMENT J50 MASTER CYLINDER</TD></TR><TR><TD>1982-83</TD><TD>18009370</TD><TD>18009367</TD><TR><TD>1984</TD><TD>18010574</TD><TD>18010572</TD></TABLE>