Can anyone give me some details about the fuel pressure regulator that is required when using a Weber??? IE where it mounts, the reason for it, where I can find one, and if I really need it, etc. I will be putting the carb on an 87 YJ with a stock I6 except for the TR upgrade. Thanks!
You will mount the fpr AFTER the filter on the fuel inlet line. You need to run it at about 2.5. Your fuel pump puts out too much pressure for the Weber, plus the use of the fpr helps very much in bumpy or non-level situations, helps keep a constant flow to the float chamber. I've had one for about 2 1/2 years with a 32/36, love it. I think it probably is the closest you can get in performance to fi without going to fi.
Thanks for the input guys... I had found the Weber Carb web site, and read about them... Looks like the only difference is the 38 gives better acceleration, and power (also cost about $20-$30 more). Less mpg improvements vs. the 32/36. I'll find the web address and repost it... Seemed to have misplaced it right now...
Weber tech guy says, fp reg should be used if fuel pressure is above 3 psi in the vehicle..
One thing about the 38, seems most complaints I've heard about bogging are with the 38 on a stock motor. It is just a little too much carb. And as far as the fuel pressure of your stock pump, I believe it will be about 7-8 lbs., I seem to remember that range from when I checked mine before installing the Weber.