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Post by swordspork on Feb 5, 2021 16:00:42 GMT
Hello all,
As part of my head refresh im considering fast road cams - I've seen the offerings from Piper and Kent cams. I would just be wondering how these cams affect drivability and idle? I wonder if anyone here has experience of how these cams change the driving experience vs stock.
Car is a mk1 1.6 that will eventually be mapped with a standalone ecu.
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Post by wannabe on Feb 5, 2021 17:04:45 GMT
The Skuzzle regrinds have been decent for me - I'm not sure of the specs but it has that slightly lumpy idle effect, which is cool, while still having good drivability and strong top-end. Whereabouts are you? Could be worth getting a drive / passenger ride with someone who has cams  |
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Post by dickie on Feb 5, 2021 23:27:05 GMT
Hi,
You will need more than just cams,( unless very mild )
Usualy you need to bump the compression up as the overlap increases.
I am running piper 285 mechanical spec with shim under bucket followers, and a 60 thou head skim with mk2.5 10-1 pistons, so quite a hike in compression. the car is quite happy at 30 MPH, The tickover is smooth at about 1000 RPM ( I have ITBS which is why the tickover is a bit high, no idle valve fitted )
My car is an 1800 but the principles are the same on any vehicle.
The Mx 5 suffers from having a very low compression ratio to start with.
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Post by swordspork on Feb 6, 2021 11:51:39 GMT
Hi Dickie, I am fitting a blink head that's got quite a significant skim and 3 angle valve seats.
It's good to hear a car with a 285 cam is still happy at lower speeds as that's what I was most concerned with.
Shim under bucket sounds cool. I'm sticking with the MK1 1.6 hydraulic tappets so won't be considering anything too wild.
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Post by Zed. on Feb 6, 2021 13:10:36 GMT
It's good to hear a car with a 285 cam is still happy at lower speeds as that's what I was most concerned with. cam timing setup can help with drivability (engine type & spec dependant) although if you were running carburettors then forget good road manners though  larger capacity engines also have better road manners @ low revs Rich. |
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le sigh