You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!
I'm thinking of using a RRFPR on my 99 RS. Right now the fuel system is stock and the car is running @ 5 psi. It's a minnam stage II kit (t3/t04) with a Field SFC for fuel enrichment. Right now i really have no idea where the settings should be. Boost comes on around 3000rpms under load. I'm using an Auto Meter A/F gauge to monitor the lean/rich situation, but don't know how much I trust it. Thus:
- Does anyone have some solid advice as to enrichment numbers on a thousand rpm scale?
-Should I be rockin' a RRFPR? If so can I get a non variable ratio unit like the ones Vortec make. I heard that the 6:1 unit is about right. Or do i need an adjustable one such as the Bell.
If all your components are good, the stock fuel system shoud handle it. Bumpng fuel pressure too much might cause it to run too rich. Getting a good A/F guage/controller would definitely be a good idea, for more power if not added reliability. Also, a 5 psi kit should reach boost before 3000 RPM. What other mods do you have?
The A/F gauge works fine, and so does the SFC I just don't know what exactly to do with it, or more precisely how to interpret what it's telling me. 3000 rpms is an average, under high load boost will spring on at under 2000 rpms, it varies. It just seems to me that an RRFPR is more "sound" as to always suppling fuel. That way i could use the SFC to smooth things out instead of being the primary supplier of additional fuel.
It probably wouldn't hurt. I'd just be concerned about over-enriching at low RPMs due to not being able to cycle the injectors fast enough. Because of that I'd say get the RRFPR, preferably one you've seen on another car that's proven reliable.
At low rpms boost isn't present and the RRFPR is esentially not there, as it's fuel pressure increse is based on manifold/boost pressure. Idle should be uneffected, because fuel presure will remain at its stock level. The problem is that I don't know anyone, with any set up. I'm flying solo here with zero help.
Talk to the folks at i-Speed. it's not like you can just putter on in, but they know their stuff with AM forced indusction, and can point you in the right direction bettr than I. Skywalker and Christoph1371 are the guys there. Give them a holler.
Originally posted by BAN SUVS It probably wouldn't hurt. I'd just be concerned about over-enriching at low RPMs due to not being able to cycle the injectors fast enough. Because of that I'd say get the RRFPR, preferably one you've seen on another car that's proven reliable.
Is this the reason people with this setup (S-AFC) have reported misfiring and a generally rough idle? My car seems to struggle for air at idle. If so, what would you recommend doing? Thanks