what fuel pressure with 24's?

Coupe50h · 11-17-2003, 08:21 PM

I know i need to turn it down with these, what should it be at? i had it at 40 psi with the stockers, now i have it at 36psi vac off, but that may be too much.....any advice would help thanx.

billheis · 11-17-2003, 11:49 PM

Hey Coupe, I'd start at 38 and then go up a little at a time and check it at the track. Then if it slows go down just a pounf or two at a time. You don't want to go to lean!

88workcar · 11-18-2003, 06:31 AM

If you had the stockers at 40, you did not need to go to 24s.

Dark_5.0 · 11-18-2003, 10:47 AM

I agree, why did you go to biger injectors?

36 sounds about right to me.

Coupe50h · 11-18-2003, 04:07 PM

why? well because im about to put a dry 100 shot on, the analyzer says something like 32psi or something, it runs real strong at 36 though, it may be over injected, but to me it seems like it hold's the rpms better in the upper range with the 24's, i actually ran about 43-45 psi on the stockers at the track, just 40 for driving around, and my plugs were whiteish, now i got a good tan color.
Thanx, i'll try 38.

Dark_5.0 · 11-18-2003, 05:23 PM

Yeah with a dry shot I would go to bigger injectors as well.

Good luck

11-17-2003, 08:21 PM	#1
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	what fuel pressure with 24's? I know i need to turn it down with these, what should it be at? i had it at 40 psi with the stockers, now i have it at 36psi vac off, but that may be too much.....any advice would help thanx. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

11-17-2003, 11:49 PM	#2
billheis Registered Member Join Date: May 2001 Location: Fernandina Beach, FL 32034 Posts: 178	Hey Coupe, I'd start at 38 and then go up a little at a time and check it at the track. Then if it slows go down just a pounf or two at a time. You don't want to go to lean! __________________ Bill Heiser 90 Convertable 5.0 LX, ported E7s w/ THumper valve job, TFS street, FR 65mm TB, B cam w/1.7 cobra rockers, kirban AFPR, Mac CAI, Mac Headers, off road h, 3 chamber flows, Crane ign. box, 3:73s, Art Carr AOD & 2600 converter

11-18-2003, 06:31 AM	#3
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	If you had the stockers at 40, you did not need to go to 24s. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

11-18-2003, 10:47 AM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I agree, why did you go to biger injectors? 36 sounds about right to me. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

11-18-2003, 04:07 PM	#5
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	why? well because im about to put a dry 100 shot on, the analyzer says something like 32psi or something, it runs real strong at 36 though, it may be over injected, but to me it seems like it hold's the rpms better in the upper range with the 24's, i actually ran about 43-45 psi on the stockers at the track, just 40 for driving around, and my plugs were whiteish, now i got a good tan color. Thanx, i'll try 38. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

11-18-2003, 05:23 PM	#6
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Yeah with a dry shot I would go to bigger injectors as well. Good luck __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

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