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Ian
Dodge Dakota
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11/21/2002
02:53:47
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 Subject: running lean with new cams
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Message:
those gains with the new krc cam for the 4.7 sound really impressive, I was discussing them with a buddy of mine and he was saying when you install new cams with greater lift and duration than stock you will most likely run lean...do you all think installing these cams and keeping everything else stock will cause me to run lean?
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KRC Tech
Dodge Dakota
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11/21/2002
07:13:21
|  RE: running lean with new cams
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Message:
That is the beauty of the adaptable speed density system. It will change within 15%. The IAT sensor can give a 5% fuel decrease or increase by itself. When you add huge heads, TB, exhaust, then the fuel curve needs to be recurved. The old OBD1 systems were more limited and would throw a code for adaptive limits exceeded. The newer OBDII systems do not. Just do not choose a cam that is designed for heads and cams combos , and then try running it in a stock configuration. Hope this helps!
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interpreter
Dodge Dakota
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11/21/2002
08:11:44
| RE: running lean with new cams
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Message:
He said that the vehicle will compensate for the newer cams by itself, to a point, which is within the range for their cams.
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KRC Tech
Dodge Dakota
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11/21/2002
09:05:13
| RE: running lean with new cams
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Message:
(These are not the droids you are looking for...)
You know, these are not the droids we are looking for...
(Move along....)
Yes, move along, move along....
I am sorry if I get rambling sometimes, I am easily led around and can get caught up in the moment and can ramble you to death. The 206 cams will not have a problem adjusting but the 218's will need more fuel. Take care!
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.alex.
Dodge Dakota
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11/21/2002
09:53:37
| RE: running lean with new cams
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Message:
Ohhh the jedi mind trick, eh?
(I'll give you $1 per cubic inch for a stroker motor....)
This month's special: $408 for a stroker motor!
Get 'em while they last!
Thanks guy! hahahaha
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Ian
Dodge Dakota
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11/21/2002
12:44:48
| RE: running lean with new cams
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Message:
thanks for the info...that's what I suspected but just wanted to make sure. Have you guys over at KRC tried the ho manifold (I know your working on your own and I'm sure it will be impressive as well)to take care of the power drop in the 4-5,000 rpm range I suspect it would take care of that nicely.
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Lemmers
Dodge Dakota
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11/21/2002
23:31:51
| RE: running lean with new cams
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Message:
Hey KRC Tech, maybe a bit off topic, but does
the speed density system on OBDII utilize a
MAP (manifold air pressure) sensor?
I'm asking 'cause I've got an '88lx 5.0 mustang
beater that's speed density. (Ford switched to
a mass air system in '90) I know some
mustang guys that tried using ford's "B" and
"E" cams with the speed density system and it
didn't work well 'cause the cams killed
vacuum at idle and manifold air pressure
causing the speed density system to idle like
crap, dumping in way to much fuel.
I'm just curious if Mopars set up is at all
similar.
Thanks,
Lemmers
02 quad sport plus 4.7 5spd,3.55, dropped
tinted, destickered, rt wheel and toyos, access
tonneau
88 lx 5.0 12.7@107 w/75 horse dry shot
100,000 HARD miles
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.alex.
Dodge Dakota
JOIN HERE
11/22/2002
08:52:57
| RE: running lean with new cams
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Message:
Yes, the old motors were also speed density, too.
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