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jasonsdakota
Dodge Dakota
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7/22/2004
20:23:10

Subject: in need of a good rpm cam
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earlier this evening i installed a air intake and jet chip 1 on my 4.7 awd ext cab dakota. i was playing around with it and it sounds great but i need something more. i would definitely be nervous against other high performance trucks. i carry 200 lbs of gear or so for work and i need to at least make up for that weight difference not to mention permanant awd. anyway, i'm use to vehicles that can generate some horsepower at the higher rpms and its finally time to fix it. i thought about the h.o. cams i hear about and i think they're rated at 20 hp increase. call me crazy but i don't want to buy a cam that comes on some 4.7s stock. i'm looking to get 30 hp out of a new cam. i'll bet the air intake will then come into play more. can anybody help me???



hmmm
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7/22/2004
21:35:15

RE: in need of a good rpm cam
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that's a good question. somebody let me know too.



mcarthey
Dodge Dakota
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7/22/2004
21:46:46

RE: in need of a good rpm cam
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Cam selection is a bit of a science. I did my research and could attempt to explain to you the differences that lift, duration, and overlap make but it's not terribly easy. I spent some time researching and kind of understand it, but I'd recommend just calling a company like Comp Cams or Crane and see what they have to say.
Both sites have good tech information.
http://www.compcams.com/
http://www.cranecams.com/

A chart that I found helpful for summarizing the information can be found here:
http://engineparts.com/Motorhead/techstuff/cam.html

In addition, I found some good information here:
http://www.newcovenant.com/speedcrafter

You could also DAGS for "cam selection".

Good luck... feel free to ask any specific questions and we'll help you out,
Mark




jasonsdakota
Dodge Dakota
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7/22/2004
22:14:07

RE: in need of a good rpm cam
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comp and crane cams seemed to have nothing for a 4.7 unless some of comps general cams will fit. i'd feel more comfortable on something made just for the 4.7. anyone heard of jonas eho cam? i know nothing about it. is it even out yet? someone get me 30 horsepower!!



mcarthey
Dodge Dakota
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7/22/2004
22:50:00

RE: in need of a good rpm cam
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I thought Comp Cams covered the Chrysler family from the 273-360. Either way, they have good info. Call them with some specific questions about your desired application and I'm sure they'd be glad to help you. I think in today's age of the Internet, people forget that you can always call a manufacturer and speak with their tech support experts and get some good info. If nothing else, it'll give you a good feel for the company and what type of service you can expect from them should you decide to buy something. I always make it a point to talk to someone on the phone first when I'm making a sizeable purchase. If they can't find time to talk to me, I probably won't buy anything.
Just my .02,
Mark




jasonsdakota
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7/22/2004
23:03:25

RE: in need of a good rpm cam
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i may have answered my own question at krcperformance.com they had a variety of cams for the 4.7 the first choice it seems for guys on this site is the krc 200, otherwise known as ... drumroll please. the h.o. cam from that one special year of jeep grand cherokees. the krc 206 most interested me cause i want some higher rpms but very pricey (if not an out of date web site) price of $700 vs the ho at $250. wow, must be made of solid gold. has anybody done an intake AFTER doing a cam to see if you really need to change the intake at all. does the ho intake flow better? what is an m1? do i have to change my throttle body.



Paul
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7/22/2004
23:17:49

RE: in need of a good rpm cam
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I have installed the KRC 212s and they are worth the money. You will not be disapointed.



jasonsdakota
Dodge Dakota
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7/22/2004
23:26:20

RE: in need of a good rpm cam
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paul, dude, you've got to tell me all about them. i can imagine it pulls to 6000 instead of our stock 4500. hows the idle? gas mileage? what intake are you running? was it really $700 or have they come down? with that cam would it be fine for my stock intake? how does a dollar a question sound? lol



Paul
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7/23/2004
01:45:26

RE: in need of a good rpm cam
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Well the power really comes on at about 2500rpm ( I have an 03' RC 5spd so I have plenty of power up to 2500) and pulls super strong up to the rev limiter and well past 6000 I imagine. My gas milage actually increased by 1.4mpg or so. The idle is a little stumbly but I think this is in part because of the already notorious crappy 4.7L Idle. But it's nothing to worry about. Im running a K&N FIPK, to a FastMan 68mm throttle body and the stock 03' 4.7L manifold. What year do you have. If it's an 03 or an 04 than you already have the "good" manifold. If you have an earlier model I would ask KRC if you would benifit from the HO manifold, I'm sure you would. The cams were actually cheaper a while ago. I asked one of the KRC guys that posts on once in a while why the increase. They said cuz' crane (they send them out to Crane with the grind specs) raised the price on them. Also Jason, it will take you about 6 weeks to get them but well worth the wait.



ZenDak
Dodge Dakota
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7/23/2004
08:00:10

RE: in need of a good rpm cam
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I'd love to get some of the 206's, or 212's,,,but they do seem pricey. I bought the HO's for the heck of it for less than $200 it seems.
Would it be terribly shiesty to get the specs of those cams and pay someone to do a custom grind for you? Ya'll think that would be cheaper?



jasonsdakota
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7/23/2004
22:11:16

RE: in need of a good rpm cam
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i've been doing alot of research, even since my last post. i think i've decided to upgrade my cams but keep the intake stock. this way i can get across the board increases without losing off idle snap. my first choice is the krc 206 but i can't justify the $700 vs mopars $206 for the ho. besides, i don't know how much work is involved in upgrading the valvesprings, which i may need to do for the krc 206. does anybody know how involved that is?

paul, what is the difference between the 2000 (which i have) and the 2003 intake? is the 2003 the same as the ho? thanks again



Paul
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7/25/2004
19:41:34

RE: in need of a good rpm cam
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Someone will correct me if I'm wrong but they upgaded the intake in 03' to the HO manifold. You haveing the 00', it might be worth while upgrading.



jasonsdakota
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7/28/2004
01:41:50

RE: in need of a good rpm cam
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would a set of 1.6 rocker arms work the same as a hotter cam. is this easier than a cam swap and just as effective. how bout a ho cam and 1.6's would this help guys with no money for the krc206?



CThomp
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7/28/2004
09:15:29

RE: in need of a good rpm cam
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There are no after market rocker arms for the 4.7L. I understand that the 4.7L does use some variation of rockers though. The '03 manifold is a different design than the original H.O. manifold but the '03 manifold is what is now used on the h.o.'s. Noone has done any dyno comparisons.

I'm still considering the 206 cams because I think they may operate in a lower rpm band than the 212's. Lower end power is what I want.



rtspeeddemon
Dodge Dakota
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7/29/2004
09:27:44

RE: in need of a good rpm cam
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Before you buy a KRC Cam.

Contact Sam Parthemer at www.socaldakota.com he can get you a custom grind cam to match your profile.



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