At 10:19 PM 7/8/01 -0400, you wrote:
>While helping a friend with his R/T that has numerous bolt-ons( MP
>PCM,Headers,Cam,1.6 roller rockers New 2bbl MPI intake,FIPK,MPRB?
>exhaust,180 stat.,high stall(2800)convertor) it doesn't seem to work as
>well as it should(99CC,14.2s at 95 I think is the best on slicks)I noticed
>one thing that disturbs me. When you drive it, it seems kind of"dead" ,sort
>of like not enough ign. timing. At WOT its only getting about 20-24 deg.
>timing depending on RPM(using a DRB3).Now to ME this doesn't seem like
>enough. I would think at least 32deg. My STOCK Jeep PCM gets 28-31!!(it
>rattles on 91) I checked another MP one,98 5.2 ones and its the same. All
>these guys can run 87 and they don't ping.Any thoughts?? What SHOULD this
>thing run?? Are there alot of R/Ts with these mods running quicker?? Not
>alot of these up around here where I live.Oh and moving the cam timing
>around helped little,and its not lean. Dave St.Louis
Except for the 5.9L, my truck is about the same weight and similarly modded.
At WOT and running with a '96 MP PCM, timing is 31 degrees from 4500 rpm
and up. With the '97 MP PCM (CA version, no Fed version), which I use on
the streets to have functional gauges, timing under the same conditions is
27 degrees and runs 1/4-mile 0.80 sec. slower. My best with the '96 MP PCM
is 14.71 under 70F temps., 70% humidity, gusty 15 mph tailwind.
It would seem that the '98 and '99 PCMs have been retarded for either EPA
or pinging or both. I use 92 octane for both '96 and '97 MP PCMs
Bob Tom Burlington, Ont., Canada
'97 CC Dakota, 5.2L, 4x2, 44RE, 3.92SG, 4,275 lb (racing weight)
RW: 231.2 hp 340.0 torque PB: 14.71 93.19 mph
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