Stock FPR alky safe?

[tonyz2897]

I'm gonna build an updated version of the alcohol injection setup I had on the daytona for the sundance. The major difference is that I want to set this one up with a return line and a fuel pressure regulator so I can get a 1:1 increase in alky pressure as the boost comes up. If that works out, I might even add a rising rate regulator later to make it even more tunable. Any thoughts as to wether or not the internals of a stock fuel pressure regulator would handle alky? I'm running Edge brand racing alcohol btw.
Thanks,
Tony

[OmniGuy123]

Alcohol is supposedly corrosive, and many have run the stock FP with it and had no trouble. I would think the same would be true for the FPR, although I cannot be sure.

[mock_glh]

FFV cars were set up for alcohol or gasoline and are equipped with fuel system components that are alcohol safe. The pump, the regulator, the fuel rail, and the injectors are stainless steel. These are non turbo cars but the engines can be identified by the turbo style intake with 4 injectors and steel braided fuel lines. If I recall correctly they were '93/'94 year models. If you could find one of these cars in the junkyard you'd be set.

[TurboShadowES]

I belive DblTrbl ran a stock reg with one of his older alky setups. He would be the guy to ask about problems.

[QKsilverF1]

i think his fuel pump did have problems after a while, but i have a bunch of fpr's, i would be interested in trying one on my setup

[tonyz2897]

I guess the way to go will be try it and see. I had thought about using parts off an FFV like mock glh suggested, but the only thing I wonder about is with the fpr not being designed for a turbo car, would you still get the pressure increase under boost?
I wonder if anybody in the aftermarket makes a boost referenced alcohol safe afpr?
Tony

[QKsilverF1]

http://www.rbracing-rsr.com/waterinjection.html

scroll a lil past half way down

[tonyz2897]

Looks like it would do quite nicely. I couldn't find it listed with a price though.
Tony

[DblTrbl]

Quote:

Originally Posted by TurboShadowES I belive DblTrbl ran a stock reg with one of his older alky setups. He would be the guy to ask about problems.

Yes, when I originally had a stock regulator and a return setup, the alky would get cloudy, but I never had any other issues. no issues with the regulator or fuel pump. One of my cold start injectors did get clogged.

Now I don't have a regulator, return or injectors, but use 4 misting nozzles instead and the alky stays clean. Still no negative issues with the stock T1 fuel pump immersed in the alky. This T1 pump is now starting in it's third year in the alky system and still no issues. I use denatured alky.

[tonyz2897]

That's some really good information! I wonder if the cloudiness you were getting was the alcohol cleaning the gasoline deposites left in the parts (assuming they were used) or slowly dissolving some internal part in the regulator or injectors?
It's really nice to know a stock type fuel pump will live that long.

My reasoning for wanting to run a regulated setup (and possibly a rrpr later) comes from proplems I was having with the old setup. I was getting way too much alcohol when the system first kicked on which tapered off to just right by max boost. The problem with this was the wastegate can I was running. With the 2 stage on the low boost setting, boost would still climb high enough to kick the alky on. This would absolutely drown the engine (sounded like a 2 cycle with the choke on). Since the alky was my only source of additional fuel, I couldn't really raise the kick on point much above where it was. This got me to thinking about a regulated setup that I could tune to match the fuel requirments over the entire range of boost from 15+.
Thanks,
Tony

[DblTrbl]

Quote:

Originally Posted by tonyz2897 That's some really good information! I wonder if the cloudiness you were getting was the alcohol cleaning the gasoline deposites left in the parts (assuming they were used) or slowly dissolving some internal part in the regulator or injectors?

If I had to guess, I would say it was the rubber fuel injection hoses that were causing the cloudiness.

I never noticed any rich effects when not in WOT. The alky comes on when I'm already at 12psi boost and the engine seems to be able to absorb all of it without any stumble. If I turn the alky on when idleing, the engine will stall right away. To tune the mixture at WOT, I leave the alky on full blast and remove gasoline by lowering the WOT fuel tables in my Cal using Dcal. The setup without the return is much cleaner overall but even more important, it gives me the multiport setup.

[tonyz2897]

I think mine might have been an extreme case. At the time I was running a holset hx35 wastegate can which would allow for a low (boost pressure straight to the can) setting of 18 psi and a high of 28. My setup at that point was single stage with a 90 psi pump and the fuel side of a nitrous fogger nozzle for delivery. The nozzle was jetted to hold the 10 light on my a/f gauge at 28 psi. So when the alky system kicked on on low boost, it was delivering enough alky to support 28+ psi with the boost limited to 18. I guess the simple way to get around this would be to use an extra injector or 2 to add gasoline up to 18 psi and then bring the alky in above that (so it wouldn't try to kick on while on the low boost setting.)
I just thought the idea of running a regulated setup sounded like it might be neat to try.
Tony

[ludwig340]

Quote:

Originally Posted by DblTrbl If I had to guess, I would say it was the rubber fuel injection hoses that were causing the cloudiness.

hehe, well, they're petroleum based, so I guess it was win-win!

[QKsilverF1]

so whats the verdict yes or no for a stock FPR on alcohol?