Best Everyday P-7100 tweaks on the cheap - Competition Diesel.Com

RacinDuallie · 07-26-2006, 06:58 AM

We need a good thread on the great budget p-pump mods that one could do and still have a great everyday muscle truck that pulls or races everynow and then

What would you suggest??
Grind your own plate?

Springs?

Adjustments?

All of the above ? And what else?

AsTroSS · 07-26-2006, 09:08 AM

Where is the previous P-7100 tune up thread ?

There was lots of useful information

***Timbeaux*** · 07-26-2006, 09:15 AM

Seveal of the threads were lost accidentaly due to a database error. Sorry.

RacinDuallie · 07-26-2006, 09:29 AM

Tis ok we can have an improved thread right now.....

AsTroSS · 07-26-2006, 11:28 AM

Here is picture of Mack truck (with P-7100 fuel pump) front rack plug, it allows more fuel rack travel.

more fuel= more power

zukgod1 · 07-26-2006, 12:09 PM

Now thats cool.

RacinDuallie · 07-26-2006, 12:11 PM

Just don't leave out the sealing ring...

*Bobcat698* · 07-26-2006, 05:02 PM

Quote:

Originally Posted by AsTroSS

Here is picture of Mack truck (with P-7100 fuel pump) front rack plug, it allows more fuel rack travel.

more fuel= more power

This is a good mod!

gunracer1 · 07-27-2006, 09:50 AM

ok you guys owe me, i hate typing.
first there is nothing wrong with grinding your own plate, very simple and badass power gains to be had. this is not rocket sciencetist stuff, the deeper the groove, the more fuel up to a point.you can chuck the plate if you don't do the front plug or afc mods.
then we get into the afc mods, with the washers switched you get a nice addition of rack travel, as in fuel. and to take advantage of this you can pull the arm out and grind 100k or so off the end to make sure you are getting full travel. and you need the plug to get the most out of it.
there ya go more fuel than any stock tranny or clutch can take.

smokin binder · 08-01-2006, 05:55 PM

Governer spring washer mod, it's pretty cheap(costs you 2 washers)!
Stretch out the overflow valve spring.
That's all I can remember at the moment

wdimig · 08-02-2006, 08:52 PM

cut your own plate, if you have a dremel, it's not hard at all, just dont mess it up! tighten the gov. springs on click, adjust the star wheel for more fuel at low boost, that about it for not spending a dime.

wes

Smokin Monster · 08-03-2006, 02:24 AM

Quote:

Originally Posted by gunracer1

... then we get into the afc mods, with the washers switched you get a nice addition of rack travel, as in fuel. and to take advantage of this you can pull the arm out and grind 100k or so off the end to make sure you are getting full travel. and you need the plug to get the most out of it.
there ya go more fuel than any stock tranny or clutch can take.

Can we get a little more detail? Which washers to switch and where to grind the arm? and where on the pump does the new plug go?

5000rpm Cummins · 08-03-2006, 01:19 PM

Grind the plate flat, take out the foot lever out of the afc and pinch the boostline. All free and will make a stock clutch slipwithout trying.

turbothom · 08-04-2006, 09:32 AM

Remove the plate. Remove the smoke arm. You will have to grind out the top rear of the timing coverplate to install the plug. SM......Look at the front of the pump. You will see the a plug, hex headed. That is removed. Check for full rack travel.

I install a 4000 GSK, no plate, no smoke arm, 180 HP injectors in a 160 pump, and dyno'ed at 397 HP smoke free. On the strip I look like a gasser.

Those are a few things.

..Preston..

oldsmokey97 · 08-05-2006, 03:35 PM

what all is involved in installing the plug in the front of the pump?? just take it out and put the new one in?????? or what?

what does stretching the spring in the overflow valve do???

oldsmokey97 · 08-06-2006, 11:31 AM

come on people i know someone in here knows............
what does stretching the spring in the overflow valve do and what is the difference between shimming out the stock rack travel cap with a washer and buying the one from mack???? Whats the difference??

12valve · 08-06-2006, 01:19 PM

Stretch the overflow valve, makes more fuel pressure at the pump! the stiffer the spring, the more pressure it will keep!

From my experience its esencial to do on most older trucks 94 and 95 once they get a plate, and get some more speed (washer mod or wide open throttle screw)! Cuz i have noticed specially on straight pipe, they pop at the exhaust at WOT. Timing and the overflow mod fixes the popping!

gstanfield · 08-06-2006, 08:57 PM

I'm with OldSmokey, I am a good mechanic, but have yet to learn anything about these diesels, so it would ne very helpful to have the very simplified (totally ignorant) explanations to some of these mods just so us newbies can figure it all out.

BTW< where would be a good place to learn about these pumps??

Thanks,
George

oldsmokey97 · 08-06-2006, 11:54 PM

is it possible to put the mack plug on the front of the pump with the pump still on the truck. I would think that the timing cover would be too much in the way.

12valve · 08-07-2006, 12:00 AM

you would have to grind some of the timing cover away! it wont come off otherway! been there done that!

gstanfield: a good place to learn about these pumps arew the forums! i got most my knowledge, practicing and reading DTR! and know most or all of the free & easy p7100 pump tweaks now

07-26-2006, 06:58 AM	#1
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	Best Everyday P-7100 tweaks on the cheap We need a good thread on the great budget p-pump mods that one could do and still have a great everyday muscle truck that pulls or races everynow and then What would you suggest?? Grind your own plate? Springs? Adjustments? All of the above ? And what else? __________________

07-26-2006, 09:08 AM	#2
AsTroSS Name: AsTroSS Title: problems start @80 psi Status: Not Here Join Date: May 2006 Location: Europe Member`s Gallery Posts: 4,327	Where is the previous P-7100 tune up thread ? There was lots of useful information __________________ Ram 2500 '98 QC 12V Cummins 4x4 automatic --->project: T-25 Ram 1500 ‘ 97 QC 12V Cummins conversion 4x4 automatic - ->project: T-15 Superb '21 -TDI 2.0 CR-205hp

07-26-2006, 09:29 AM	#4
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	Tis ok we can have an improved thread right now..... __________________

07-26-2006, 11:28 AM	#5
AsTroSS Name: AsTroSS Title: problems start @80 psi Status: Not Here Join Date: May 2006 Location: Europe Member`s Gallery Posts: 4,327	Here is picture of Mack truck (with P-7100 fuel pump) front rack plug, it allows more fuel rack travel. more fuel= more power __________________ Ram 2500 '98 QC 12V Cummins 4x4 automatic --->project: T-25 Ram 1500 ‘ 97 QC 12V Cummins conversion 4x4 automatic - ->project: T-15 Superb '21 -TDI 2.0 CR-205hp

07-26-2006, 12:09 PM	#6
zukgod1 Name: zukgod1 Title: Old fart Status: Not Here Join Date: Jul 2006 Location: Utah Member`s Gallery Posts: 1,397	Now thats cool. __________________ COMPETITIONDIESEL. 08 F-350 King Ranch, 6.4, H&S. EGR and DPF delete, 5" exhaust and THAT'S IT! Well, aside from wheels/ tires and a leveling kit. Tired of broken crap.

07-26-2006, 12:11 PM	#7
RacinDuallie Name: RacinDuallie Title: Black Sheep Racing Status: Not Here Join Date: Apr 2006 Location: Supporting Northeast Diesel Racing Member`s Gallery Posts: 17,369	Just don't leave out the sealing ring... __________________

07-27-2006, 09:50 AM	#9
gunracer1 Name: gunracer1 Title: Too Much Time Status: Not Here Join Date: Jun 2006 Location: just north of lake weatherford, tx Member`s Gallery Posts: 2,068	ok you guys owe me, i hate typing. first there is nothing wrong with grinding your own plate, very simple and badass power gains to be had. this is not rocket sciencetist stuff, the deeper the groove, the more fuel up to a point.you can chuck the plate if you don't do the front plug or afc mods. then we get into the afc mods, with the washers switched you get a nice addition of rack travel, as in fuel. and to take advantage of this you can pull the arm out and grind 100k or so off the end to make sure you are getting full travel. and you need the plug to get the most out of it. there ya go more fuel than any stock tranny or clutch can take.

08-01-2006, 05:55 PM	#10
smokin binder Name: smokin binder Title: DT466 fan Status: Not Here Join Date: Apr 2006 Location: Woodland, CA Member`s Gallery Posts: 323	Governer spring washer mod, it's pretty cheap(costs you 2 washers)! Stretch out the overflow valve spring. That's all I can remember at the moment Last edited by smokin binder; 08-03-2006 at 05:37 PM.

08-02-2006, 08:52 PM	#11
wdimig Name: wdimig Title: Too Much Time Status: Not Here Join Date: Aug 2006 Location: Frederick, MD Member`s Gallery Posts: 584	cut your own plate, if you have a dremel, it's not hard at all, just dont mess it up! tighten the gov. springs on click, adjust the star wheel for more fuel at low boost, that about it for not spending a dime. wes __________________ 2010 Ram Mega cab, Deep water pearl blue/tan two tone, Cooper ATP's, Retrosolutions 55w 4300k HID's, ARP 625's, GDP S3 intake horn/grid reloc. & air boss plate, S&B intake w. scoop, Sinister Egr del., H&S MM w. OD tuning, Dia. Eye 5" TBE, 437/963 @ 2013 Fall Brawl

08-03-2006, 01:19 PM	#13
5000rpm Cummins Name: 5000rpm Cummins Title: Frequent Flyer Status: Not Here Join Date: Jun 2006 Location: Ohio/Holland/Jordan Member`s Gallery Posts: 6	Grind the plate flat, take out the foot lever out of the afc and pinch the boostline. All free and will make a stock clutch slipwithout trying.

08-04-2006, 09:32 AM	#14
turbothom Name: turbothom Title: dobro slide boy Status: Not Here Join Date: May 2006 Member`s Gallery Posts: 179	Remove the plate. Remove the smoke arm. You will have to grind out the top rear of the timing coverplate to install the plug. SM......Look at the front of the pump. You will see the a plug, hex headed. That is removed. Check for full rack travel. I install a 4000 GSK, no plate, no smoke arm, 180 HP injectors in a 160 pump, and dyno'ed at 397 HP smoke free. On the strip I look like a gasser. Those are a few things. ..Preston..

08-05-2006, 03:35 PM	#15
oldsmokey97 Name: oldsmokey97 Title: Too Much Time Status: Not Here Join Date: Aug 2006 Member`s Gallery Posts: 744	what all is involved in installing the plug in the front of the pump?? just take it out and put the new one in?????? or what? what does stretching the spring in the overflow valve do???

08-06-2006, 11:31 AM	#16
oldsmokey97 Name: oldsmokey97 Title: Too Much Time Status: Not Here Join Date: Aug 2006 Member`s Gallery Posts: 744	come on people i know someone in here knows............ what does stretching the spring in the overflow valve do and what is the difference between shimming out the stock rack travel cap with a washer and buying the one from mack???? Whats the difference??

08-06-2006, 01:19 PM	#17
12valve Name: 12valve Title: Diesel Boy Status: Not Here Join Date: Aug 2006 Location: mexico Member`s Gallery Posts: 576	Stretch the overflow valve, makes more fuel pressure at the pump! the stiffer the spring, the more pressure it will keep! From my experience its esencial to do on most older trucks 94 and 95 once they get a plate, and get some more speed (washer mod or wide open throttle screw)! Cuz i have noticed specially on straight pipe, they pop at the exhaust at WOT. Timing and the overflow mod fixes the popping! __________________ 96 3500 Dually Manual Raptor Fuel Pump, 215 pump, no plate, Haisley 5K GSK, modded afc with spring kit, PDD 7mm DVs, Haley 5x.016 injectors, ARP head studs, 60lb valve springs, Southbend clutch.

08-06-2006, 08:57 PM	#18
gstanfield Name: gstanfield Title: Are we there yet? Status: Not Here Join Date: Jun 2006 Location: Casper, WY Member`s Gallery Posts: 777	I'm with OldSmokey, I am a good mechanic, but have yet to learn anything about these diesels, so it would ne very helpful to have the very simplified (totally ignorant) explanations to some of these mods just so us newbies can figure it all out. BTW< where would be a good place to learn about these pumps?? Thanks, George __________________ 1997 2500 SLT 4x4 #100 fuel plate, 16.5degrees timing, 3k GSK, Amsoil homemmade intake, Dodgezilla turbo, KDP killed, Dunrite converter & VB, 285/75R16's and autometer gauges.

08-06-2006, 11:54 PM	#19
oldsmokey97 Name: oldsmokey97 Title: Too Much Time Status: Not Here Join Date: Aug 2006 Member`s Gallery Posts: 744	is it possible to put the mack plug on the front of the pump with the pump still on the truck. I would think that the timing cover would be too much in the way.

08-07-2006, 12:00 AM	#20
12valve Name: 12valve Title: Diesel Boy Status: Not Here Join Date: Aug 2006 Location: mexico Member`s Gallery Posts: 576	you would have to grind some of the timing cover away! it wont come off otherway! been there done that! gstanfield: a good place to learn about these pumps arew the forums! i got most my knowledge, practicing and reading DTR! and know most or all of the free & easy p7100 pump tweaks now __________________ 96 3500 Dually Manual Raptor Fuel Pump, 215 pump, no plate, Haisley 5K GSK, modded afc with spring kit, PDD 7mm DVs, Haley 5x.016 injectors, ARP head studs, 60lb valve springs, Southbend clutch.