Ionization. With the Accel coil, my cap and rotor get grubby every 10K or
so. Now that I have an M1 on, changing the cap will be nice and easy.
TonyC
-----Original Message-----
From: dwmagnum <dwmagnum@mountaincable.net>
To: dakota-truck@dakota-truck.net <dakota-truck@dakota-truck.net>
Date: Wednesday, November 27, 2002 2:06 AM
Subject: Re: DML: Dyno #s - YO BOB!
>
>YO - BOB!, the cap and rotor - YEH! the same problem I had with the
>Shelby Dak. Lots of ugly white crud. DW
>
>Bob Tom wrote:
>>
>> For all you 1/4-milers,
>>
>> Last winter I ported my heads with the MP porting templates.
>> My decision for going this route came down to money.
>>
>> My SAE corrected numbers with the stock heads:
>> Peak HP: 226.1 @ 5000
>> Peak Torque: 257.2 @ 4500
>>
>> My SAE corrected numbers with the ported heads:
>> Peak HP: 241.7 @ 5750
>> Peak Torque: 254.1 @ 4250
>>
>> Unfortunately, circumstances dictated that two dyno shops
>> using different software and hardware were used so that
>> comparing the numbers is not exactly like comparing
>> apples to apples. Also, the printout that I got for the
>> ported heads were for increments of 250 rpm and not
>> the normal increments of 100 rpm for the stock heads.
>> Nevertheless, it gives a close enough ballpark figure of what
>> to expect.
>>
>> With my drivetrain loss, there was a gain of about 20 hp at
>> the flywheel. I certainly was pleasantly surprised to see that
>> the peak torque rpm had actually dropped a couple of hundreds
>> of rpms. I also had expected the peak hp rpm to rise but not quite
>> so high.
>>
>> As for track performance, weather and track conditions did not
>> come close to those where I ran my bests last year. 14.313 @ 95.05.
>> My best this year was 14.42 and I did up my trap speed to 95.92.
>> At the end of Sept. this year, I began to experience intermittent bucking
>> and misfiring in the high rpm range. Initial data indicated that the
>> problem might be air-fuel related and I concentrated on this area.
>>
>> Last week, I discovered the problem was the cap and rotor. All the
>> contacts were coated with a hard, thick, 'calcium-like' deposit.
>> I have never seen a condition like this. Looked like it went through
>> Jon's mud pit :-)
>>
>> Also, when the air temps. began hitting the 40Fs and below, I noticed
>> that my coolant temp. was around 150F (city/highway) and barely cracking
>> 160 at the track. The 180F tstat turned out to be partially stuck open
>> and I was running quite rich.
>>
>> Just to show you how much the above problems affect performance, the
>> dyno numbers with them are:
>> Peak HP: 217.9 @ 5600
>> Peak Torque: 245.3 @ 4300
>>
>> Next week I'll be replacing the RT cam with one that is closer match
>> to my MPI 4bbl intake and ported heads.
>>
>> Have a great Thanksgiving, all you USAers.
>>
>> Bob, Burlington, Ontario.
>
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