ok.. right now i have the rc 440cc injectors in. my idle pressure is about 10psi.. i installed the smallest ring and disc but couldn't get above 40psi at 10lbs of boost. im now going to the second smallest spring to see if i can get the fuel back up where it should be.

any thoughts on this?

thanx
James

the 2.72" disk would probably be best for your setup. i have the 415's, and i have an idle pressure around 15 psi of fuel. it idles fine. you'd just need to idle around 10-12 psi (soooo low, but i know a 2GNT can idle around there, mine did when i was fooling with it, but not with perfect fuel trims)

you'll definatley need the bleed valve for the S-FMU too, but i bet you already have one anyways. i have about 3 turns taken out to give me the correct mixture under full boost.

also... i have modified my vacuum restrictor. if i left it in there unmodified, my S-FMU felt "laggy"... not sure how to describe it. so i tried it without the restrictor and it ran great, but way too rich. my solution was to double the diamater of the hole in the vacuum restrictor. i have had the most luck with this method.

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>
>also... i have modified my vacuum restrictor. if i left it in
>there unmodified, my S-FMU felt "laggy"... not sure how to
>describe it. so i tried it without the restrictor and it ran
>great, but way too rich. my solution was to double the
>diamater of the hole in the vacuum restrictor. i have had the
>most luck with this method.

So you just drilled out the restrictor a bit bigger? I get that lag a bit too..like you see the boost go up, but it takes a second or two to "feel" the car go..So now with that "mod", it boosts right away? Good info there nate..

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well. i ended up using that disc.. my idle fuel pressure is 10 to 12 psi.. idles just fine.

15psi of boost feels very nice

James

would the resistor you guys are talking about be the check valve?

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no this is a little metal tube (looks like a reducer) that you have to put in the vacuum line going to the S-FMU.

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i have that but dont have it in place.. why do you have to put that in there?

thanx
James