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Old 09-12-2004, 04:57   #1 (permalink)
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2ltr won't rev

I have a 2ltr mk1 with the usual mods (40 thou flat top pistons, large cam, some head work, extractors, etc) and the car will not rev past 5000 rpm. Is this to be expected? When you take off hard it will fly up to 5000 then start to miss and break down, if you keep into it past 5500 the engine just dies and then starts back up again in a few seconds. The car still has points and they have been set according to the workshop book and I have tried two standard carbies and both have done the same thing. While I was checking things I noticed that when a test light is put on the positive side of the coil it is very dim and just today the car is very hard to start unless the ignition key is in just the right spot. Does anyone have any idea what the problem could be? Could it be a faulty ignition switch not giving the coil enough power? Any help would be greatly appreciated.
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Old 10-06-2004, 05:38   #2 (permalink)
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Re: 2ltr won't rev

Hey,
I had a similar problem with both my Kent and Pinto Motors for my MKII Escort, they had a lot of head work includeing wild cams, there are two things you will need to do...

The most important thing to do is ditch the points. For $300AU you can go to Auto barn and buy a Crane universal Optical Electronic Ignition conversion, and get the matching coil too ($60). The reason your engine is fluttering is due to point bounce at 5000rpm.

Once this is rectified you may run into a second problem of valve bounce (around 6500 rpm), to fix this see your cam grinder and get springs to match your specific cam, don't just buy any springs as too light will not improve anything and too heavy will wear your cam out too quickly.

My escort is a 2.1L EFI with 60 thou 10.5:1 lightened and balanced with 20thou oversized valves and head porting with a custom cam. I run 15.6 naturally aspirated :)

If you have any more questions about either the Kent 1600 or Pinto 2000, e-mail me on melksham@yahoo.com

Cheers
-Kenn
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