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Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 98.5-02 24V Forums > 98.5-02 Performance Parts Discussion
98.5-02 Performance Parts Discussion Discussion of Performance Parts For the 98-02 Trucks No Advertising ...NO ADVERTISING

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Old 11-25-2009, 09:34 PM   #1 (permalink)
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port & polish.

is it worth doing on these trucks? how much do you gain
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Old 11-25-2009, 10:00 PM   #2 (permalink)
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I would like to know also.
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Old 11-25-2009, 10:21 PM   #3 (permalink)
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yes its worth doing. #1 and #6 cylinders are way more restricted on airflow then the rest. i would guess around 60hp gain or around their. also the spoolup should be noticeably quicker. but be prepared to spend some dollars.!
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Old 11-25-2009, 11:15 PM   #4 (permalink)
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just did a spare head I had waitin to put it on.
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Old 11-25-2009, 11:20 PM   #5 (permalink)
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yeah worth it def.
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Old 11-25-2009, 11:22 PM   #6 (permalink)
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Quote:
Originally Posted by DavidRasch17 View Post
yes its worth doing. #1 and #6 cylinders are way more restricted on airflow then the rest. i would guess around 60hp gain or around their. also the spoolup should be noticeably quicker. but be prepared to spend some dollars.!
really? that big of gain?
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Old 11-26-2009, 12:06 AM   #7 (permalink)
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i would probly just do it myself. just wondering if it would be worht it
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Old 11-26-2009, 12:15 AM   #8 (permalink)
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i dont think it would be worth it on a 24v....maybe if u just got money to burn i guess but the 12v's head and 24v's head dont even compare. big hp 12v's have to port the head just because its half the valves. i wouldnt think its worth the 2 grand ur gonna spend on porting a 24v head by haisley or scheid.
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Old 11-26-2009, 12:17 AM   #9 (permalink)
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i would port and polish it myself. so money is not a factor. i just want to no the gains. i understand about the extra valves
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Old 11-26-2009, 01:33 AM   #10 (permalink)
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There really isnt any gain as far as hp is concern, but yhe spool up is noticably quicker along with about a 200* drop in egts.
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Old 11-26-2009, 02:02 PM   #11 (permalink)
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correct me if im wrong about the 60hp gain. i thought i heard that. maybe that was swapping a cr ported head onto one of these engines. sorry if its not correct on the hp. but i just thought i recalled it being around their! its stiff worth doing though if u have the money or do your self if you have the skills
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Old 11-26-2009, 02:35 PM   #12 (permalink)
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on a 24V head it's worth doing if you're making a performance vehicle, and like stated above power gains probably won't be anything to write home about. but spool up and egt's will increase greatly. so perhaps if you're running a giant single for competition or whatnot porting would be the way to go.
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