t.o.o. relief hole results

[Sonnyballs]

What's the stock idle pressure on the Prelude? If you install 370's, the idle pressure will need to drop by about 25% from the stock level. You may need to drill several relief holes to get what you need. The AEM FPR would work great for this application, but I don't think they make one for the Prelude.

Sonny

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Sonny Van Hook ([email protected])
2000 JRSC'd Civic Si @ 6psi (Powered by Hondata)
1999 Tonykart/Honda 125cc Shifter (in the works)

[schwett]

stock idle pressure is 30-37psi according to the helms... i believe 32-34 is the range most stock ludes are showing.

i do have a VAFC, so that should help me with the bigger injectors in case i can't get the pressure low enough. i'm trying to avoid drilling a really big hole.

i'm going to order the injectors tomorrow, but i still haven't decided 100% on 370s or 440s. my pressures will still be pretty high with the 370s, and not much room to grow if i up the boost. but on the other hand i'd like to keep it as smooth and stock as possible. i know that the 440s CAN be idled with the vafc, but it sounds like it's pushing it.

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[5 Liter Eater]

I used a 1/16" (.0625) bit and the lowest I can go is 30 PSI together with my Vortech fuel modifier. I need to go a little bigger to get down to ~25 at idle w/ my 310's.

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Bill Winters
'94 GSR w/ JRSC @ 9 PSI, ENDYN stepper pully, Cartech 20005, Vortech fuel modifier, RC 310's, AEM fuel rail, Hotshot 3" short ram intake, 2 1/4" test pipe and homemade CAI

[schwett]

i drilled a ?.040" relief hole in my stock FPR. also put a d&m adjustability kit on it (fully backed out at the moment.)

idle FP went from 52 to 40. i will probably drill it bigger when i put the 370s on, but i'm happy for now. the car feels a bit peppier off boost, but may just be psychological!

[schwett]

aem does have a setup for the 5th gen lude but it requires replacing the stock fuel rail. i don't really trust the AEM FPR... too many stories of leakage. i figure if my car idled fine at 52psi with 290s it should idle fine at 40psi with 370s!

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Sonnyballs:
What's the stock idle pressure on the Prelude? If you install 370's, the idle pressure will need to drop by about 25% from the stock level. You may need to drill several relief holes to get what you need. The AEM FPR would work great for this application, but I don't think they make one for the Prelude.

Sonny

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