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Dan
Dodge Dakota
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10/26/2003
23:12:59
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 Subject: KRC 4.7L/206 Camshafts?
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Was wondering if anyone has ran these cams? I have a 2002 4.7 dak. ANd I wanted to either get the H.O cams or the 206 krc cams? Just curious how the 206 cams run. If anyone has had problems. Let me know. Thanks
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Billy
Dodge Dakota
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10/27/2003
23:13:49
|  RE: KRC 4.7L/206 Camshafts?
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KRC cams are regrinds. That requires them to
use lash caps, cause the cam lobes have
been cut down to reprofile the lobe. The lash
caps and the hydraulic adjuster needs to take
up the slack in the valve train. On the higher
profile 212/218 cam, the adjusters can't make
up this slack and you get alittle valve clatter or
ticking. The 206 cams may be ok, but I can't
say for sure.
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.alex.
Dodge Dakota
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10/28/2003
09:32:21
| RE: KRC 4.7L/206 Camshafts?
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The 206's are regrinds and I have heard that they do NOT clatter. I have heard that they make big power over the HO cams, though.
I can tell you that if you can live with a little valve clatter, the 212/218's make huge power (if you have the right mods to run them.
For example:
Computer Flash with no rev limiter
Big throttlebody
deep gears
true dual exhaust
HO intake manifold
etc....
Auto trannies will need a stall converter for these to be effective.
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dakotaman4dr
Dodge Dakota
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10/28/2003
12:57:33
| RE: KRC 4.7L/206 Camshafts?
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I think one of the guys down here in houston that I run with put the 206's in his 2000 cc 4.7lt auto. He said it pulls like a bat out of hell now between 3100 - 5500 rpms.
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Waltherone
Dodge Dakota
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10/29/2003
00:12:09
| RE: KRC 4.7L/206 Camshafts?
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Yes dakotaman4dr, that'd be me :) (by the way how did those pics from the mopar show turn out? You never posted them on delphi?)
Dan, we put my cams in two weekends ago. I can't give you hard numbers or anything as I haven't dynoed since last january.. All I can say is this.
2000 4.7L CC Auto, 3.92/LSD, intake and 3" single exhaust, with the deathflash from the dealership (soon to be fixed by KRC ;) )
When I went out on my first test run on the highway near my house (where I practice launch, play around, etc) I accelerated up to a 20mph roll with the truck manually kept in 1st gear, then punched it at 20-22mph (3100rpm), tires let out a NICE loud bark. For what it's worth, before the cams anything over 15mph wouldn't even chirp. From 2500-5000rpm they pulled HARD.
This past saturday I put on the HO intake manifold, well wanted to test it but the roads were wet. Got one good test pass tonight though.
Cliff notes: The 206's have made no noise at all thus far, and after the truck got about 80 miles on the computer after the install, they pulled, as blake said, like a bat out of hell in the midrange areas. Now with the manifold, they pull hard above 5000 as well, so I'd say from about 2500-4700 they quickly surge upward in power, then (with the help of that manifold) hold the steady until it shifts out at 5400.
Incidentally, idling at open cutout has quite the intimidating gurgle ;) (Id like to hear the 212's and 218's...)
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GraphiteDak
GenIII
10/29/2003
19:41:40
| RE: KRC 4.7L/206 Camshafts?
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Gurgle. Are you saying it gave a slight lope to the idle? I like that.
So, here's my concerns.
With the 206 camshafts, has anyone towed and how was it? Did you have to drop out of OD more often? Keep in mind I have stock 3.55 gears too.
I want to at least go with the HO cams, but would like to go straight to the 206 cams if they don't give a problem. I assume the stock manifold may keep more low end torque over the HO one as well?
I'm really curious. When I installed agressive cam shafts in my old school small blocks along with single plane intakes, my low end power was all but gone. But say hello to power from 3000 to 7200 RPM's in a daily driver!
2003 Graphite QC 4X4 4.7 Auto 3.55
Home Brewed Cold Air Intake, Flowmaster 40 series, Modified TPS to .72VDC, Modified IAT. 160° T-Stat.
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Justsoyouknow
Dodge Dakota
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10/29/2003
23:14:14
| RE: KRC 4.7L/206 Camshafts?
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Your suppose to have the overdrive off at all times while towing. Also even if you have a complete factory tow package you still have to put 70-140 synthetic in rear differential.
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Tom J.
Dodge Dakota
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10/29/2003
23:38:07
| RE: KRC 4.7L/206 Camshafts?
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KRC206's are fine for towing but do not install HO manifold. It will kill your towing power. I am furious that I wasted my time and money on the HO manifold, I have noticed no gain and lost alot of lowend grunt. Of course I have Ram Quadcab and with the extra weight is going to suffer more from lost lowend than a Dak.
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GraphiteDak
GenIII
10/29/2003
23:59:02
| RE: KRC 4.7L/206 Camshafts?
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Why would I have to change the rear diff oil?
That sounds kind of crappy to me.
Thanks for the reply Tom.
I was kind of thinking that may happen. Maybe I should install 206 cams and keep my OEM manifold. The cams should bring up the power in upper RPM's and hopefully the stock manifold will retain some lower grunt this engine has.
Oh yeah. I do usually take mine out of OD but I've noticed on this new tranny you really don't have to if you don't want to. It's intelligent enough that it keeps it out of OD on it's own during loads and uphill, etc. It never shifts back and forth.
2003 Graphite QC 4X4 4.7 Auto 3.55
Home Brewed Cold Air Intake, Flowmaster 40 series, Modified TPS to .72VDC, Modified IAT. 160° T-Stat.
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Waltherone
Dodge Dakota
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10/30/2003
00:10:33
| RE: KRC 4.7L/206 Camshafts?
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Well I can't attest to their towing power as I've only towed once since I've had this truck. The low end was still there pretty well, without the manifold it was mostly midrange gains (say 2500-4500ish), I didn't do much of a test of the sub-2500rpm power as top end is what I wanted on my truck anyways. .alex. has the 3.55's in his truck, maybe he will know a little more about the low end? Then again he doesn't have 206's.. :\
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GraphiteDak
GenIII
10/30/2003
00:21:53
| RE: KRC 4.7L/206 Camshafts?
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Cool.
Maybe alex will check back and reply.
I will be going true duals next spring, all the way from the manifolds with high flow cats.
So I'd like the cams and intake to compliment that while having enough grunt to tow now and then.
This is my main driver in town but it also tows my ATV's on a regular basis. Most of the time I tow in town so at that point I don't care about grunt as much. But every now and then I tow up some BIG hills!
2003 Graphite QC 4X4 4.7 Auto 3.55
Home Brewed Cold Air Intake, Flowmaster 40 series, Modified TPS to .72VDC, Modified IAT. 160° T-Stat.
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AndrewM
Dodge Dakota
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10/30/2003
08:03:26
| RE: KRC 4.7L/206 Camshafts?
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"Why would I have to change the rear diff oil?
That sounds kind of crappy to me."
Because it's specifically stated in the manual that you should change to synthetic if you do any towing.
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.alex.
Dodge Dakota
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10/30/2003
10:28:47
| RE: KRC 4.7L/206 Camshafts?
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The 206 cams and anything larger (212's and 218's from KRC) are really NOT meant to give anyone low end power or towing abilities. If that is your main focus, I'd stick with the HO cams and forget about the HO manifold. You might actually want to reconsider true duals for that matter.
All the power that I have made is from 2500 on up, but I have a manual transmission truck, so there's little to worry about with low-end. If you have a heavy truck or an auto tranny, then don't go making a whole bunch of power up high with out a stall converter and some deep rear gears.
Sorry.
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GraphiteDak
GenIII
10/30/2003
12:24:25
| RE: KRC 4.7L/206 Camshafts?
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This IS a tough one to decide. My truck tows just fine as is. But I would LOVE to open up some HP in the upper RPM's. I'm not allowed to have a Mustang or anything these days, so I bought this truck. This "family" all purpose QC has to be my 4X4 Mustang LOL! It sounds damn good the way I have it now for what it is. When I go duals, I plan on keeping them small until the exits, like 2 inch or 2 1/4 inch from the front manifolds.
Anyway, I think I still may go with the 206 cams and keep the stock intake which should keep some bottom end.
I may change gears after a while too so it should all work out for performance AND towing.
Oh yeah, Andrew, thanks for explaining that to me. I never thought I'd be required to change my rear diff, especially when my truck came "ready to tow" with my heavy duty tow package. Sounds like a crapy deal to me. Oh well. I don't tow anything REALLY heavy. It's just my ATV's.
2003 Graphite QC 4X4 4.7 Auto 3.55
Home Brewed Cold Air Intake, Flowmaster 40 series, Modified TPS to .72VDC, Modified IAT. 160° T-Stat.
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Paul
Dodge Dakota
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10/30/2003
16:26:07
| RE: KRC 4.7L/206 Camshafts?
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Hey Waltherone,
I'm looking pretty hard at the 206s. How was the install ? Did it go pretty smoothly? Is it install and go, or did you have to do anything else to the truck ?
Thanks for any info.
Paul.
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Tom J.
Dodge Dakota
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10/30/2003
17:44:38
| RE: KRC 4.7L/206 Camshafts?
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The lash caps are the killer on the KRC206 and higher cams. They are tiny and if they fall off while you are installing the cam there is a good chance they will fall down the oil journals and be gone for good. I don't think you can get a replacement lash cap without ordering online from crane. I will add that my truck idles way low (500rpm) since the cam install and playing with the adjustment on my 70mm F&B TB only makes it more erratic. The IAC motor just doesn't like these cams and I can't figure out what the connection is. The power is good with these cams and the idle is smooth above 600rpm. Just know that you might give up a few things to get that power.
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Paul
Dodge Dakota
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10/30/2003
18:24:55
| RE: KRC 4.7L/206 Camshafts?
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Thanks for the info, I'll watch out for the lash caps.
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OH WELL
Dodge Dakota
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10/30/2003
19:32:22
| RE: KRC 4.7L/206 Camshafts?
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There goes your warranty on your differential if they want to bust`em.
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Waltherone
Dodge Dakota
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10/30/2003
20:12:29
| RE: KRC 4.7L/206 Camshafts?
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Like tom said...those lashcaps scare me :(
For the install, I had on hand a guy that had done the HO cam install twice. He did most of the work too actually..
As for put them in and go, you put the lashcaps on and then the cams in, and go. My truck wouldn't run after the cam install. It would start, then idle, then die the moment we even look at the throttle to rev, then it wouldn't start. Finally we started it and just revved continuously, and it was fine after that. The night I did the manifold, the PCM reset after the battery being disconnected for a while, and when I started, it stalled twice (and like after cam install, wouldn't start without giving it some throttle while cranking). Maybe that's just my particular PCM, because Alex never mentioned it. But after it keeps running, there's no problems at all man.
The install is pretty straight forward now that I've seen it, you spend more time disconnecting crap and pushing things out of the way to remove the valve covers than anything else. Just be VERy careful with the lashcaps. If they go down the oil return, the neighbors won't like the words that come out of your mouth :)
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GraphiteDak
GenIII
10/30/2003
20:39:15
| RE: KRC 4.7L/206 Camshafts?
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So you need those lash caps for the OEM HO cams as well? Or just the regrinds?
Hmm... I'll be careful with my selection before I swap my cams. The 206 is one step more aggresive than the OEM style HO cams right? I'm not looking at the listing right now so I can't remember.
2003 Graphite QC 4X4 4.7 Auto 3.55
Home Brewed Cold Air Intake, Flowmaster 40 series, Modified TPS to .72VDC, Modified IAT. 160° T-Stat.
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Waltherone
Dodge Dakota
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10/31/2003
00:04:09
| RE: KRC 4.7L/206 Camshafts?
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No, for the HO cams you don't need the lashcaps. The caps are just to compensate for the lobes being reground (and thus ground DOWN a bit more). HO cams are a plug-and-play of sorts, put them in and go.
And yes, the 206's are one step over the HO cams. I think HO cams are something like a 200int/212exh duration and .477 lift, something close to that. the 206's are 206int/218exh and .502 lift onintake side. I'm no cam expert by no means(hell, not even remotely close :P ) but I don't think the 206 is really DRASTICALLY more agressive than the HO cams, but I could be wrong.
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