4455 pump mods - Competition Diesel.Com

valleyduramax · 03-06-2013, 10:32 AM

have a JD 4455 and would like to turn it up a wee bit. Does a lot of tillage work so still want it to be safe but just a bit more power to help it out a bit. Any ideas or tips on where to start? It has the bosch A inline pump but not real knowledgeable with these. thanks

Drake_Lawdawg · 03-07-2013, 09:41 AM

There's a great document about Bosch inlines found here:
http://transportation.centennialcoll...203/inline.pdf

valleyduramax · 03-07-2013, 05:16 PM

Just looked over that document and lots of info but i was looking for more of a direct instructions lol like turn this screw a number of turns lol any info on that?

jedeka · 03-07-2013, 07:04 PM

I would put an exhaust pyro on the tractor before you do much. Then, you can start a 1/4 turn in at a time.

sootfoot · 03-07-2013, 08:19 PM

I don't know anything about that pump

But I hope you got a dyno close, each motor responds differently to fuel pump adjustments. I made some adjustments on my 1066 pump for the field, and based it off what a lot of others were doing. I then dyno'd and had to back it down some cause it was way hotter than I wanted for the field.

valleyduramax · 03-08-2013, 11:46 AM

ya i was planning on both boost and pyro and run it stock then make small adjustments. just not sure of what screws to turn lol and what order to change them.

bosshogg · 03-09-2013, 08:26 PM

Get an intercooler off a 4555, 4755, or 4955 to keep temps in check, then you can run about 200hp safely through it. Should get you what you are wanting after pump adjustments.

JDGnut · 04-17-2013, 01:10 PM

Just saw this... take the four bolts off the small cover at the back of the pump... loosen the 10mm jam nut.. use a flat bladed screw drive end.. (will need one with a 90 degree end.) screw in the set screw... I think we usually figured 1/4 turn was 20-25 HP on an A pump... The engine won't have a problem with the HP.. I've seen them at 300hp with all stock parts.. it will be everything behind it... as long as everything is in good should should be fine...

blackcoal · 04-29-2013, 11:59 PM

Quote:

Originally Posted by JDGnut

Just saw this... take the four bolts off the small cover at the back of the pump... loosen the 10mm jam nut.. use a flat bladed screw drive end.. (will need one with a 90 degree end.) screw in the set screw... I think we usually figured 1/4 turn was 20-25 HP on an A pump... The engine won't have a problem with the HP.. I've seen them at 300hp with all stock parts.. it will be everything behind it... as long as everything is in good should should be fine...

just seen this, ya thats how you do it. turn it all the way in till it wont idle back down and back it off from there. watch egts if your gonna use it in the fields though

JDGnut · 05-06-2013, 10:55 PM

I haven't turned one that far, so I'm not going to say... I had a 4640 at 300 Hp on the dyno... but I don't remember how far down I ended up turning it.. I set it about 190, and sent it home...

Jim Fulmer · 05-07-2013, 09:31 AM

Did this very thing to a 4450, check timing and it was dead on, check for air leaks from the manifold to the AFC and set full fuel at 11 psi then tuned the pump up 3/4 turn. Runs like a champ but it is not a hard pulling tractor as I raked hay with it yesterday.

I'd agree that gauges and an intercooler of any type would make it that much better.

Jim

fox · 05-07-2013, 11:35 AM

My dad had a 4840 that would overheat it the fuel was higher that 240.
It ran good though.

03-06-2013, 10:32 AM	#1
valleyduramax Name: valleyduramax Title: Green Behind the Ears Status: Not Here Join Date: Apr 2011 Member`s Gallery Posts: 40	4455 pump mods have a JD 4455 and would like to turn it up a wee bit. Does a lot of tillage work so still want it to be safe but just a bit more power to help it out a bit. Any ideas or tips on where to start? It has the bosch A inline pump but not real knowledgeable with these. thanks

03-07-2013, 07:04 PM	#4
jedeka Name: jedeka Title: Too Much Time Status: Not Here Join Date: Oct 2009 Location: Boone, Iowa Member`s Gallery Posts: 1,413	I would put an exhaust pyro on the tractor before you do much. Then, you can start a 1/4 turn in at a time. __________________ 1996 Dodge Ram 2500 4x4, 5 spd. 4.88 gears, 2.5" turbo, Smokem inj, 5000 rpm springs, NV271, South Bend dd clutch, 33x12.50-15 STS tires, 6 inch stack, custom valve springs 2005 3500 4x4 dually, auto, KORE leveling coils, 19.5 wheels, Smarty Jr

03-07-2013, 08:19 PM	#5
sootfoot Name: sootfoot Title: IH Nut Status: Not Here Join Date: May 2010 Member`s Gallery Posts: 124	I don't know anything about that pump But I hope you got a dyno close, each motor responds differently to fuel pump adjustments. I made some adjustments on my 1066 pump for the field, and based it off what a lot of others were doing. I then dyno'd and had to back it down some cause it was way hotter than I wanted for the field. __________________ Sold: 06 QCSB 6spd, Valair twin disc and some other bolt ons. My father will enjoy driving it! New to me: Toy hauler 06 Laramie QCLB DRW 48RE, Mag-Hytec DD pan, AFE Intake, MBRP 5" straight, Glacier Diesel Filter kit

03-09-2013, 08:26 PM	#7
bosshogg Name: bosshogg Title: Running with the best... Status: Not Here Join Date: Nov 2009 Location: Franklin, OH Member`s Gallery Posts: 510	Get an intercooler off a 4555, 4755, or 4955 to keep temps in check, then you can run about 200hp safely through it. Should get you what you are wanting after pump adjustments. __________________ 2013 2500 Crew/Long 6.7 68RFE NV273 stock until 2018 2011 Jeep CJ7 304/T18/D300. D44's F&R on 35x12.50's

05-07-2013, 09:31 AM	#11
Jim Fulmer Name: Jim Fulmer Title: Too Much Time Status: Not Here Join Date: May 2006 Location: Quanah Tx. Member`s Gallery Posts: 5,013	Did this very thing to a 4450, check timing and it was dead on, check for air leaks from the manifold to the AFC and set full fuel at 11 psi then tuned the pump up 3/4 turn. Runs like a champ but it is not a hard pulling tractor as I raked hay with it yesterday. I'd agree that gauges and an intercooler of any type would make it that much better. Jim __________________ 01' 12V, S/B, Q/C, 4WD 98' 12V, S/B, Q/C, 2WD

03-07-2013, 09:41 AM	#2
Drake_Lawdawg Name: Drake_Lawdawg Title: Rookie Status: Not Here Join Date: Jul 2011 Member`s Gallery Posts: 26	There's a great document about Bosch inlines found here: http://transportation.centennialcoll...203/inline.pdf

03-07-2013, 05:16 PM	#3
valleyduramax Name: valleyduramax Title: Green Behind the Ears Status: Not Here Join Date: Apr 2011 Member`s Gallery Posts: 40	Just looked over that document and lots of info but i was looking for more of a direct instructions lol like turn this screw a number of turns lol any info on that?

03-08-2013, 11:46 AM	#6
valleyduramax Name: valleyduramax Title: Green Behind the Ears Status: Not Here Join Date: Apr 2011 Member`s Gallery Posts: 40	ya i was planning on both boost and pyro and run it stock then make small adjustments. just not sure of what screws to turn lol and what order to change them.

04-17-2013, 01:10 PM	#8
JDGnut Name: JDGnut Title: Too Much Time Status: Not Here Join Date: Jun 2006 Location: Waxahachie, TX Member`s Gallery Posts: 405	Just saw this... take the four bolts off the small cover at the back of the pump... loosen the 10mm jam nut.. use a flat bladed screw drive end.. (will need one with a 90 degree end.) screw in the set screw... I think we usually figured 1/4 turn was 20-25 HP on an A pump... The engine won't have a problem with the HP.. I've seen them at 300hp with all stock parts.. it will be everything behind it... as long as everything is in good should should be fine...

05-06-2013, 10:55 PM	#10
JDGnut Name: JDGnut Title: Too Much Time Status: Not Here Join Date: Jun 2006 Location: Waxahachie, TX Member`s Gallery Posts: 405	I haven't turned one that far, so I'm not going to say... I had a 4640 at 300 Hp on the dyno... but I don't remember how far down I ended up turning it.. I set it about 190, and sent it home...

05-07-2013, 11:35 AM	#12
fox Name: fox Title: Too Much Time Status: Not Here Join Date: Dec 2008 Location: central Illinois Member`s Gallery Posts: 908	My dad had a 4840 that would overheat it the fuel was higher that 240. It ran good though. __________________ 1998 12 valve 4x4 2500 auto trans.