How can you eliminate the fuel pressure regulator in the 2.8. I want to go with an external adjustable type due to the fact that that the engine is going to have quite a few mods along with a 100hp shot of nitrous and I was afraid of running the engine lean. I have a drop in Holly high volume fuel pump that will replace the stock pump but i'm still afraid that the factory fuel pressure regulator will block to much fuel.
Any sugustions?
Cliff...what can I say, the fourm is great and the people are great!!!

one of those mods will be a steel crank I hope.

Cliff, yes it is, I was also told that a machine shop could harden the cast crank but I'm sure that it wouldn't be as strongas the steel. Any body have any options on that? Does anybody know where I could get a steel crank for the 2.8?

I'm not Cliff.

There are adjustable regulators that replace the OEM unit on the fuel rail. I believe that both Accel and Jet have those available. The Fiero Store also stocks one :

85-88 V-6 Adjustable Fuel Pressure Regulator Part #52602 $79.95

If you need more control than these units provide (for some strange reason??), you can always turn them up full and use an external unit on the return line from the fuel rail regulator. There are also a boost controlled fuel regulators available which are beneficial on turbocharged applications, but I doubt they could be used with an NO2 system.

Mike

Sorry Orge, I was trying to do 10 things at once.

Ok I am tired of people having the wrong impressions of nitrous and its effects on engine components. The stock crank can handle a 100 shot of nitrous oxide. If having engine rebuilt, Have the crank treated(machine shop will know what to do) and have it nitrited. This is like shotpeening the rods and such. It helps prevent stress risers from forming. The first thing to go with nitrous is the pistons unless they are forged or hyper pistons. Stock pistons can handle a 100 shot of nitrous. How many times I don't know but I just ran a 90 through mine for a complete qtr mile run and all is still good. The crank did not break!!! Nothing else broke either. All the other nitrous runs are with a 70 shot and I have run numerous qtr miles with a 70 shot and all is still working great. I have owned my nitrous system for over a year now too. The first thing that I expect to go when I am running my nitrous is the pistons. I would have to guess that they are stock cast pistons but they have held up great so far with continuous 70 shot and one burst with a 90 shot. If unsure of what you think your car can handle just go with a 70 shot.

i have purchased an air/fuel guage cause I was running nitrous and wanted to make sure I wasn't running lean and when using the 70 shot I am not even close to running lean. On the 90 shot however I forgot to look at the guage as I was going down the track so I don't know what it was reading.

There is a website where a guy has a turbo 3.1 in a cavalier Z24 and has run as much as 24 psi of boost on the stock crank. Guess what people. It held up. This guy has forged rods and pistons so it would seem to me that the weakest link in the bottom end is the crank. but it is still in one piece. That is much more pressure then a 100 shot of nitrous. The address for this guys car with complete detail of buildup is http://members.tripod.com/TurboZ24/

I do think that a adjustable fuel pressure regulator could add some insurance but will probably require some dyno tuning to make sure that pressure is good and such. However my fuel pressure regulator(stock) has seemed to do a good job with my nitrous setup. I don't have a fuel pressure guage to monitor the pressure but I am not running lean so at least that much is good. I hope I provided some usefull information to you.
Shaun http://members.aol.com/shaun41178 to see my car with nitrous.

I promise my answer will be shorter than Shaun's. Yep, the pistons are more likely to be the weak link. Use forged pistons for best durability. The 70 shot NOS is a better match for the 2.8, in my opinion.

Thanks guys for the help, as far as the pistons go, I have TRW 40 over forged pistons.
Shaun..I like your web site, I'm always looking for any updates you put on it.