I put a ford/powerdyne supercharger on my 1997 4.6 4x4, it is a 6psi kit and included a fuel pressure regulator. I also put a 132lph holly inline fuel pump in and removed my JET chip. I also run a set of headers. The problem is this, during the daytime hours the temperature is about 75 to 80 degrees. At these temperatures I feel very little increase in power. As the temperatures go down the power increases, but there is often a flutter during acceleration when the boost hits about 3psi. Once the cooler night air is in, the power comes on strong, smooth and has unbelievable power. I understand the theory of cooler air being more dense which in turn has more oxegen, but at 75 to 80 degrees I think I should be getting more power. Powerdyne says its the nature of a supercharger. I don't buy this. I have also considered an intercooler or aftercooler but have read of many instances where this doesn't make any noticeable differences in power or performance when running such little boosts. The techs at the ford tech line agree. They told me to look into some sensors. I took the IAT sensor, it checked out OK. I proceeded to put a 47K ohm resistor into the plug- fools the computer into thinking that the intake air temp is about 75 degrees. I brought the truck up to temp and beat on it a little bit until I started getting the flutter, put the resistor in the plug and then the flutter went away and the power came on strong again. I need to wait for another hot day to see if this will be a permanent fix?? I am wondering if anybody else is having problems with their blowers in warm/hot weather or how theirs reacts with the temp changes. Also one tech at ford says that 30lb/hr injectors and a recalibrated mass air flow sensor won't help my particular problem - I agree to a certain point. Any help or info will be a great help.

 

HI!... MARK : You stated that you added a HOLLEY 132LPH fuel pump. Is this pump running in conjunction with the factory pump or all by itself. My "99" F-150 5.4 has a 190LPH pump in the tank from the factory. Also, what size fuel injectors are you running currently. 19LB injectors are only good to about 304H.P at the flywheel. 24LB'ers are good till 384H.P and 30LB'ers are good till 480h.p. The fomula for figuring your required fuel injector size goes like this : FLYWHEEL H.P DIVIDED BY 2, AND THAT # DIVIDED BY THE # OF CYLINDERS YOU HAVE (8). Hope this helps you out a bit.

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NEAL " THE H.P FREAK" E-MAIL :nnewman@sympatico.ca
'99' F-150 XLT SPORT, oxford white, reg cab shortbox stepside,5.4, auto, 4.10L.S, captain's chairs, bedliner, GTS carbon fiber headlight covers, ***** CEPECK clear halogen driving lights, GTS slotted tailight covers (painted oxford white), fiberglass smooth wiper cowl (painted OXFORD WHITE), FORD locking lug nuts, tinted windows,true duel exhaust with 2.5 inch mandrel bent pipes and FLOWMASTER 3 chamber mufflers with 3' tailpipes exiting before the rear wheel like the LIGHTNING, HELLWIG rear stabalizer bar, 3 AUTOMETER guage pods, filled with tranny temp, engine temp, and oil preasure AUTOMETER "PHANTOM" guages,custom fabricated air intake trac and huge K/N filter, TPS mod, BELLTECH 2-inch rear drop, custom programed SUPERCHIP "FLIP-CHIP", BAUMANN ENGINEERING shift kit (on stage 5 setting)BYPASS CLUTCH CONTROL VALVE/PREASURE REGULATOR VALVE, ASP POWER PULLEYS, custom tig welded and ported JBA "JET BLACK coated headers, twin DERALE 16 INCH ELECTRIC FANS, PERMA COOL 14"/10" tranny cooler with 10" electric fan, PERMA-COOL external tranny filter, custom ported (STOCK) throttle body, custom digital air intake temp sensor, custom ported TB intake elbow, relocated ATS, FORD RACING 24LB injectors, RUSSELL stainless steel braided tranny lines with fittings.


FUTURE MODS : BBK 75MM THROTTLE BODY, 80MM PRO-M MASS AIR METER, AADI F1 RAM AIR HOOD WITH CUSTOM FABRICATED RAM AIR SET-UP, CAL-TRAC TRACTION BARS, EXTRUDE HONED INTAKE MANIFOLD, SHM CUSTOM FUEL RAILS, 90/10 FRONT CE SHOCKS, 70/30 REAR CE SHOCKS, BELL TECH 2/4 DROP, EXPEDITION CENTER CONSOLE, HARLEY DAVISON F-150 LOWER FRONT VALANCE (painted oxford white) and a KENNE BELL BLOWZILLA SUPERCHARGER.

ESTIMATED H.P TO DATE : 340H.P / 425ft/lbs of torque.

CURRENT PERFORMANCE : 1/4 MILE - 14.52E.T * MPH - 93.73 * 0-60MPH - 5.8 * 1/8 MILE - 9.2 * 60 FT - 2.0

OTHER TOYS : "83" PRO STREET FORD RANGER : 351-w stroked to 408c.i 625H.P (natural), 875H.P with 250H.P "BIG SHOT" N.O.S kit, tubbed (crome moly tubing), 12 point chrome moly roll cage, 4-link with coil overs, MUSTANG II front suspension, c-4 tranny (race prepped), 4000rpm stall converter(8 INCH), 3" chrome moly driveshaft,AUTOMETER guages, 16.50 MICKEY THOMPSON rear tires, 4" M/T front tires, CENTERLINE CON-VO PRO rims, fiberglass hood - bumper - prostock hood scoop, wishbone trac-link, two chrome moly driveshaft loops, 16 gallon JAZ fuel cell,etc

 

Mark, I have two suggestions: 1) Get to a dyno and get some air fuel numbers; 2) Call Mike. T and have Superchips make you a chip.
I would be a little worried with the flutter at 3psi; you could have a lean condition.

I have the Vortech system and I do notice a drop in boost when the weather gets hot. One thing you need to pay attention to is the boost levels in first and second gear--boost is easier to read in these gears with your type of sc. If you are judging your boost level in say third gear, it will take a while and many rpm's to get that boost level up. Remember, on your type of supercharger, boost is determined by rpms. If you are only getting 3 pounds in first gear at 5000rpm's then you may have a very conservative pulley on your system.

Ron

 

Mark, were you using the FMU?, with a bigger pump, you may be stuffing too much fuel into the motor.I'll bet you don't have a fuel pressure gauge hooked up. That should be a must with the blower.The ACT temp sensor will cause the EEC to pull out timing as the temp goes up, up to a full 6 degrees or more, however I don't think that is your problem. If you like, I'll bring some tools and a FP gauge to work tonight, if you want to have me take a look at it.Let me know here.As most often, when you ask for power and have problems it usally indicates a rich condition, as does the better performance in cooler tempatures. As for the 30#er's, and a larger MAF, they would most certianly help, by eliminating the FMU and allowing you to run a custom programmed chip, which will provide more presice fuel deliverly. Most aftermarket MAF's change load tables that add timing, so a chip will be needed to avoid detonation.

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2001 F-150 XLT S-CAB 4.6 "Fully equipt, and Superchip'd!"
96 Taurus GL
93 Kenne-Bell Supercharged Mustang
"Injection is nice, but I perfer being blown!"

www.kenne-bell.com/owners.asp
http://www.corral.net/cgi-bin/member...p00000403&p&p0


86 Kawasaki ZG 1000 A-1 Concours

 

JStang- I used the FMU that was supplied in the kit. The stock fuel pressure regulator is also being used on this setup. I am also running the factory in tank pump along with inline Holly pump. I drove the truck today and never felt the flutter, not once, with the resistor installed. I scanned the truck with my monitor 4000 and came up with nothing. I haven't checked fuel pressure yet and I don't know what it should have with boost or under a load. I would like to have you look at it, maybe I am overlooking something stupid. My e-mail is mark707300exc@yahoo.com

 

I'll e-mail you. Have you tried running it with just the stock fuel pump? The FMU closes down the return line to the tank, and effectivly dead heads the pump against the injectors, forcing the additional fuel through, it was designed to work with the stock pump, by adding the additional pump, you are probally forcing too much fuel. You have a scan tool? can you get real time O2 sensors readings from it? under boost, you should get 7/10's of a volt(.700). This will get you close, the absolute way to do it is with a wide band O2 sensor and a dyno, however this can cost some big bucks, and there is no one that I know of in the state that has one and tunes Fords.I'm sure we could get you so close that a trip to a dyno wouldn't net you more than another 10-20hp.I belive you are leaving a lot on the table by running rich.

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2001 F-150 XLT S-CAB 4.6 "Fully equipt, and Superchip'd!"
96 Taurus GL
93 Kenne-Bell Supercharged Mustang
"Injection is nice, but I perfer being blown!"

www.kenne-bell.com/owners.asp
http://www.corral.net/cgi-bin/member...p00000403&p&p0


86 Kawasaki ZG 1000 A-1 Concours