12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

98 delivery valve help

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Old 03-03-2015, 08:42 AM
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Default 98 delivery valve help

I have a 98 automatic 12 valve. I have a 100 plate, bhaf, timing advanced, boost elbow and 215 injectors and a airdog 100.. im looking at buying some delivery valves but not sure on what to go with.. i dont want alot of smoke i just want some more power.. i also dont wanna spend couple hundred bucks for 20hp either.. i dont beat the truck or race it just want a little more pep to get on the highway since this thing has no top end at all .. i was looking at 191s but from i know i already have 181s so i dont think its gonna be enough for me .. so maybe .024s or .022s? Thanks!
 
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Old 03-03-2015, 12:21 PM
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Get a 4k gsk and valve springs, that will help on top end. If this isn't enough for you I would get a bigger turbo before the DV's
Make sure you got the tranny built up to handle your current mods as well, a torque converter can make the world of a difference in acceleration.
 

Last edited by MechanicalDiesel; 03-03-2015 at 12:23 PM.
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Old 03-03-2015, 04:35 PM
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DVs aren't what you want with that pump.
 
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Old 03-03-2015, 06:42 PM
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Oh sorry i forgot to add i do have the pacbrake 3gsk.. that i believe i made a little tight because in nuetral it will free rev to 3500.. i only did it once dont want to float a valve so some dsy i gotta get back in there and take them down a click.. i also have a somewhat built trans that was put in about 4 months ago.. truck has get up and go in first gear but the rest of the gears seem like crap until it hits overdrive then it pulls like a mule ..
 
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Old 03-03-2015, 08:44 PM
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Get a better turbo, maybe a little bigger injectors. You don't really need bigger DV's unless you want to put down some power
 
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Old 03-04-2015, 12:14 AM
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Well i replaced the turbo not too long ago with a reman hx35 from my work since i get parts cheap, but i was thinking maybe putting a bigger exhaist housing on and a 4 inch exhaust.. my exhaust now is 3 inch straight pipe.. and since my injectors are new do you think it would be smarter to just put a set of bigger nozzles on? And for the delivery valves i dont mind pushing alot more power i jus dont wanna smoke out the streets and run 1800 egts like i use to in my commonrail .. this truck has 200k on it now and i would like it to run as long as possible
 
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Old 03-04-2015, 06:13 AM
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Originally Posted by countryboy040993
And for the delivery valves i dont mind pushing alot more power i jus dont wanna smoke out the streets and run 1800 egts like i use to in my commonrail ..
Essentially what we're saying is, this is exactly why DVs aren't right for you. I mean, you could probably run them and tune some of that smoke out with some serious pump tweaking, but what you gain from the whole thing won't be worth the trouble and it will probably still be dirty. If you had an old 165 pump it would be worth bumping them up to what this pump came loaded with, but you don't.
 
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Old 03-04-2015, 08:11 AM
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Ok so it would be a better investment to go with maybe like 90hp nozzles instead..and upgrade the exhaust housing on the turbo and a 4 inch exaust
 
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Old 03-04-2015, 02:46 PM
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I would go with 5x.012s and get a super b turbo, valve springs for intake and exhaust, buy the upgrade to make the gsk a 4k. You will have plenty of clean power on tap with a properly tuned afc.
 
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Old 03-04-2015, 06:17 PM
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Ok cool thanks! The pacbrake kit i bought came with the extra spring to do the 4gsk i just left it out because from what i understand having an automatic will be pointless putting it in being my truck will never see 4k rpm because of the shift points..
 


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