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#1 |
Registered Member
Join Date: Mar 2006
Location: Fort Wayne, Indiana
Posts: 49
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![]() K guys I need help. WIll my 19 be enough to feed my motor or should I use 24's.I have an ajustable fuel regulator and I know I'll have to get new fuel rails. Whats done is I have a stock motor except for the following.CompCams 5.0 Xtreme EFI XE282HR cam,FMS underdrive pulley's,MSD Ignition with Blaster Coil,Crane roller rockers 1.7 and roller lifters,Trick Flow Street Heat Intake,70mm throttle body,C & L 73mm mass air meter,BBK cold air kit,electric fan, flow tech x-pipe with flow master american thunder.Should I also get a 190 or 225 fuel pump??? All sugestions greatly Appreciated and Thanks
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#2 |
Undescribable
Join Date: Sep 1998
Location: Ft Myers Fla
Posts: 1,539
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![]() first of all you won't need new fuel rails if you change injector size. you will need to get your mass air sensor recalibrated for the new injectors. are you still usingthe stock heads?? if so a nice set would make that thing scream with the mods hou have done right now. a 190 fuel pum p will be fine unless your gonna go wild with the engine later on.
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#3 |
Registered Member
Join Date: Oct 1999
Location: Pierre Part, La. U.S.A.
Posts: 1,850
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![]() You do not need rails to change injecters. You do not need injecters for what you have, although a regulater would be nice. And that is WAY TOO MUCH CAM for stock heads.
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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 ![]() |
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#4 |
Registered Member
Join Date: Mar 2003
Location: Saint Louis, MO
Posts: 634
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![]() ditto what 88workcar said...........
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Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/ |
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#5 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() If you've got plans of taking the car further in the future (e.g. better heads), then I'd go straight to 30# injectors and mass air combo and a minimum of 255 lph pump. I'd look for a good tuner in your area to get it all dialed in when you're done.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#6 |
Registered Member
Join Date: Mar 2006
Location: Fort Wayne, Indiana
Posts: 49
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![]() Thanks I know the cam is way to big for stock heads, just not getting enough overtime to pay for new heads right now but will have them this year. There are also plans for a turbo or procharger next tax time. If I can convince the wife. lol
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#7 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
With what about 15 psi of fuel pressure. ![]()
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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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#8 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Just like a carburetor, the engine will only use what it needs. I'd rather run an injector at 60% duty cycle safely then push it to 95% or higher duty cycle. If the MAF is calibrated properly (or custom tune done), then you'll get the same fuel delivery for a given amount of airflow whether its 19#, 30#, or 42# injectors....assuming you haven't pegged the meter or saturated the injectors. As a matter of fact, if he's planning on a supercharger/turbo on down the line, why not go straight to 42# injectors with a Lightning 90mm MAF now and save getting new later? Buyfordracing.com has a 42#/90mm combo going right now for $349 to your door. Hard to pass up.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#9 | |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Quote:
We run 60# injectors in high horsepower blower cars without any adjustable regulator at all, yet they manage to pass smog tests. Why? Because the system is tuned to operate efficiently from idle all the way to redline.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#10 |
Registered Member
Join Date: Mar 2006
Location: Fort Wayne, Indiana
Posts: 49
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![]() Anybody know if the Ford Racing GT40X Turbo Swirl Heads are any good?
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#11 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Not really very good. Compare their out-of-the-box numbers with other aluminum heads and they're pretty low on the list. Go with Trick Flows or Edelbrocks. The Brodix ST50 head is a good head too if you want to stick with a traditional in-line Windsor.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#12 |
Registered Member
Join Date: Mar 2006
Location: Fort Wayne, Indiana
Posts: 49
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![]() Cool, I'll look into that
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#13 |
Registered Member
Join Date: Mar 2006
Location: Fort Wayne, Indiana
Posts: 49
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![]() I also have a question about my ajustable fuel pressure regulator,t does not have the connection where you put the vacum line on from the intake. Do I just plug it or get a different one, its a holley regulator.
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#14 | |
Registered Member
Join Date: Mar 2003
Location: Saint Louis, MO
Posts: 634
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![]() Quote:
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Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/ |
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#15 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() True, but the limits to adaptive learning are reached pretty quickly. Adjusting fuel pressure is a poor way to control A/F though. I had a car on the dyno the other night that changing fuel pressure a mere 2 psi (from 38 to 40 psi) changed the A/F from 13.1 to 12.1! Can't tell you how many cars I see come in running 48 psi of fuel pressure yet they can't understand why the car is hard to start and the fuel mileage is in the dumps.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#16 |
Registered Member
Join Date: Aug 2002
Location: SanAntonio, Tx
Posts: 957
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![]() while we are on this subject, jeff or someone know where my fuel psi should be set?
right now it's at 34 psi wot, I have 24's and the mods in my sig. It seems stronger around 40 psi though? has not been dynoed yet. thnx
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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 |
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#17 |
Moderator
Join Date: Aug 2000
Location: Milan, OH
Posts: 2,699
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![]() Set it at 40 psi with the vacuum off.
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Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!" |
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#18 |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() I prefer to get the correct injector size for what I have instead of getting bigger injectors than what I need and pay a tuner to make them work.
Different strokes for different folks.
__________________
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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#19 |
Registered Member
Join Date: Oct 1999
Location: Pierre Part, La. U.S.A.
Posts: 1,850
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![]() Jeff I took your advice, set the fuel at 39psi. The 30s are over for my car right now, something went right with this mass air stuff, I went 12.20, 12.09, 12.02, and even 11.98 @ 113. Sun. The more I drove it the better it got.
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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 ![]() |
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#20 | |
Registered Member
Join Date: Apr 2001
Location: Staging lane
Posts: 4,337
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![]() Quote:
What injectors are you running?
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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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