I just finished polishing my intake inside and out (350TPI), was very temped to siamese the base, but not this time I want to get other mods on first and see if I can find some alluminum heads.
Any way I got an Accel adjustable fuel pressure regulator kit, put it on and put my vacume tester on it, it leaked like mad. I RTV'ed the tube threads and teflon taped the adjuster screw threads, no leaks now. Is the normal on these kits? and will it hold a set pressure.
Does any one know. Because if its a piece of junk I'll take it of now before I get it all back together?? Thanks in advance

 

I have heard bad things about the Accel Regulator, mainly that it leaks. But I have never used it personally.

 

Ill probably get semi flamed for this,but if your car is stock and has no engine mods,dont even bother with a AFPR.Why?The car runs fine with the stock one.
I have a few mods to my 86 including some engine mods and still running the stock FPR.
The only time to really use one is for a tuning aid and when youre at the track.
A Corvette magazine had a few tuners speak their opinions about them and said theres no real HP gains on stock engines and is not worth the problems many of them have.

I will agree, higher pressure atomizes the fuel better,and can result in some gains,but for a stock motor,minor mods and daily driver,I wouldnt touch it.

Aside from some poor quality AFPR on the markets,there have been situations where a person installed one and the screw would back off,and lose pressure,resulting in a poor running car.

They had to keep setting the fuel pressure every once in a while to get it back up.This is not with every unit but has happened.
When you install a AFPR and set the pressures a little higher,the ecm will see over time its running a little richer and adjust the injector pulse width to compensate for that,resulting in a no real gain situation with one.

At WOT,the ecm ignores the oxygen sensor and relies on the prom info for fuel delivery.
If youre running lean at WOT,then the AFPR may help..if not, youre going to run even richer.They usually set the tables to run a little richer at WOT to prevent lean air/fuel engine damage.

I prefer to leave things alone when they work just fine.Its not until you have extensive mods,engine work,and etc that an good AFPR is warranted,maybe will benefit and have a prom burned correctly for your needs.

Sorry if this sounded negative,it wasnt meant that way but I feel theyre not worth it.Look at the work you already had to do to seal it up.Whats next in line there ?

Good Luck and hope your engine project comes out great.

 

Well Bill, here's your flame...The guy that posted this said that he had just finished polishing the intake, and although I'm making an assumption, has probably ported the plenum as well. Therefore he's not exactly stock. I guess that's not much of a flame. I do agree that if a car is stock than the AFPR is not worth the effort. But for anyone that has plans of modding or already is modded, then the AFPR is a must. This is why I will be installing one when I haul out my injectors to be send out to Cruzin.

I haven't heard anything bad about the Accel regulator, but if anyone else has, I would like to hear it. I'm still undecided on which unit I want to purchase and I would love to hear feedback.

 

Actually, I am going to BACK UP Bill. 91WS6TA has an SD system and they tend to be quite rich stock from the factory. The amount of air flow, even from a FULLY ported intake will not produce enough extra flow to compensate for the richness of the stock eprom.

To see EXACTLY how your doing on your mixture (for part-throttle...which is a good guide of the overall mixture level of the eprom) is to run a scan tool and compare the BLM/INTs to 12/128. If the BLMs are lower than 128, you are still rich.