More RPM

[Archive]

Has any one had there govener springs replaced for more RPM? If so,how much RPM are you running now? Thanks MPb

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92 W350,LE, 4x4, DRW ,4:10 LSD, auto, 16cm2, PW injectors, K&N, autometer pro comp gauges exhaust temp, boost ,trans temp, tach,pump adjustments black & silver, running boards, stainless wheel covers

 

[Archive]

I don't think you need to replace springs to pick up a bit more RPM.
The governor adjustment is right on the side of the pump (also under a metal cap with a tight fit) It is an adjustment screw just like the idle screw and you can see one end of it (at radiator end) of pump. It is just above the manual shutdown lever with the cover cap facing the rear of engine

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93. 5 D250 4X4,HD Spring Pkg, Rancho 7000's, Rear Swaybar,Dual Shock Front Stabilizer,BD Injectors,31/2" Mandrel bent exhaust,16cm 'Hot End',Modest Pump Tweaks/Timed,K&N Air,Isspro Pyro,Tach,transmission Temp,Auto Meter Oil Filled Boost Ga. , 3:54's, 4 Speed Auto, Clubcab, Aftermarket Reclining Buckets w/ctr Drop Down seat/console, Black over Silver, 21psi,285-65R-16's,American Racing Clear Coat Mags, Amsoil 15W-40HD Marine,12,000 lb. Warn Winch,KC Spots. 97,000 Kms.

 

[Archive]

I talked to Piers about this when I was at BD and he said that 3000-3100rpm would be a good place to set it.

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88 GMC CREW CAB 4X4 89 6BT,NO INTERCOOLER YET,AUTO METER LIQUID FILLED GAUGES,NV4500,NP205,4. 10's,35 BFGA/TKO,6" LIFT,DETROIT LOCKER,16CM,K&N,3. 5 EXHAUST,BD PIERS SPECIALS INJECTORS

 

[Archive]

SEEMS like a good question would be WHY?

Since the USEFULL power in the older Cummins is down around 1600-2000 RPM, what practical point is there in increasing maximum RPM? The only "benefit" *I* can visualize, is a higher top speed out on the freeway, but even THAT seems sorta' impractical... AND, won't even comment on the adverse effects on engine reliability when exposed to overspeeding...

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Early '91 250, 727 AT, 307 rear... Banks Stinger exhaust, intercooler... US Gear OD... MORE than a match for every new PS Ford encountered so far...

 

[Archive]

You need 3150 rpm to out run a powerstroke with 354 gears! Don't know about 307s.

Stab

 

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One reason is when you upshift to the next gear say from 3rd to 4th on a 5 speed to be high enough in rpm to keep the engine from lugging,in the next highest gear. More useable rpm range. I have been told that these engines were also governed as high as 3100 by cummins depending on the application of the engine.

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88 GMC CREW CAB 4X4 89 6BT,NO INTERCOOLER YET,AUTO METER LIQUID FILLED GAUGES,NV4500,NP205,4. 10's,35 BFGA/TKO,6" LIFT,DETROIT LOCKER,16CM,K&N,3. 5 EXHAUST,BD PIERS SPECIALS INJECTORS

 

[Archive]

Shannon, maybe you need a newer truck #ad
#ad
#ad
, say a 96. Mine runs up to 4000RPM, and pulls hard to at least 3800.
Don

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Ol' WHEEZER
96 2500 4x4 5spd 3. 54 grs, #10 TST plate, AFC spring kit(light spring), 16 cm turbo, CUSTOM 4" exhaust, (turbo to tail), K&N RE-0880 filter, TST guages, 370HP injectors, 3800 rpm governor spring kit,"Accidently" modified fueling curve, Slightly advanced timing(17. 5deg. ) Modified valve lash, Powershot 2000 propane injection system, Mcleod dual disc clutch(street), 315-75R16 Durango AT's, Linex Liner and Rockers,

 

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Don, maybe we need to swap engines. That way you would know what it was like to have some one fly by you like you were sitting still. Then I would laugh all the way home. LOL Shannon

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92 W350,LE, 4x4, DRW ,4:10 LSD, auto,DTT converter, superior transmission shift kit, 16cm2, PW injectors, K&N, autometer pro comp gauges exhaust temp, boost ,trans temp, tach,pump adjustments black & silver, running boards, stainless wheel covers, 74 Road Runner, 69 Dart GTS factory 383 matching no. s

 

[Archive]

DOES ANYONE CARE TO POST DIRECTIONS ON HOW TO TURN THAT HIGH RPM SCREW UP? SOUNDS LIKE WE NEED TO KNOW...

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Greg's 1993 D250 4x2. . 5-speed. . extended cab. . longbed. . bright white. . tinted windows. . 4-inch stack through bed. . K&N air filter. . holes in air box. . 143,000 miles. Tweaked pump. PW injectors... 12CM housing in real soon. . {thanks Piers}. "The Phantom"

 

[Archive]

I run Ol' Blue's RPM's up to just under 3,000rpms. She now pulls strong to @2800 rpm's. Before she wouls run out of puul at about 22-2300 rpm's. I like it (she does too). I don't run them that high very often, but if the need arises to "get gone" in a hurry all you do is mash it down. Genrelly when racing, I shift as soon as the boost in a particular gear stops climbing.

To turn the rpm's up is easy. The best way to find the high idle screw is to raise the hood and manually work the throttle linkage on the pump. You will see the linkage hit two stops. One stop is the idle stop screw. When the throttle is rotated till it hits the other stop this is the high idle stop screw. Now you just llo9sen the jamnut on this screw and turn it counterclockwise which allows the throttle linkage to have more travel. Be sure to have a tach so you don't over rev it. Very easy to do. You may have to remove a cap over the head of the screw if your truck's pump has never been adjusted just remeber, removing this cap and performing these adjustments will void your 7 year 100,000 mile warranty HA HA. By the way you do not need 3150 to outrun PSD's in my part of the country. It is fun to see the look on the drivers face as an 11 year old truck blows by his new ride. I thin kthat's why they call them POWERCHOKES.

later
Don

 

[Archive]

So is there really any more advantage to this other than higher top speed. I never have any trouble with mine lugging when shifting gears.

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• '93 250 LE 4x4 5spd 4:10 Loaded,dual 5" chrome stacks,12cm² turbo(37psi),PW injectors,K&N,pyro/boost,US Gear E-Brake,tool box,CB,10" AR rims, 285/75/16 Bf goodrich. "wirenut_21529" on Yahoo Messenger
• '97 Ford B-Series school bus (5. 9 Cummins!)I'm gonna Bomb it!
• '94 GMC 2500 6. 5L Turbo

PICTURES.

 

[Archive]

Now, I was told that the '89s were the heavier block and components than the other years and the rev limit should be 2800 not 3000. Mine is set to 3000 at no load and peters out at 2800 on the highway, I mean err, uhh... . Anyhow, is this true about the very first gen blocks????

J-eh