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Support mods for larger cam

Old 09-05-2009, 10:11 PM
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Default Support mods for larger cam

Ok guys excuse my ignorance but I'm curious about this....after reading some threads people have made it sound like if u step up to a pretty large cam, you're gonna need bigger fuel injectors. Is this correct or am I misreading it and one has nothing to do with the other?
Old 09-05-2009, 10:51 PM
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If you are making more power you are going to be using more fuel, which means your injectors are going to be working harder.

You will be close to/or max out the stock 26lb/hr injectors in a large cam-only application most of the time. Just make sure and tell whoever tunes the car to pay attention to the injector duty cycle % and tell you what it's at.
Old 09-05-2009, 10:53 PM
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ya today i some how had a injector break on me....im 104% duty cycle at the numbers below....cams a 240's
Old 09-05-2009, 11:48 PM
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Yes, you need to upgrade the FI's. You can potentially leave more power on the table if you don't. I've seen from other post you want to use an MS4. I would recommend some 37#. That way of you do heads down the road, you still have a cushion but not too much.
Old 09-06-2009, 10:55 AM
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id just get a set of 42s they will be cheaper and if u ever upgrade you will be ready


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