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I still haven't retard the timing for this application until I hear a detonation, I did powerrun repeatedly at 100 percent throttle maybe more than 20 times ,this test is using a lower grade fuel, then on the last 3 runs I heard some detonation on higher rpm then we stop, we poured in some octane booster, and the detonations gone, hit 39hp one time but thats just spike, power stable at 37hp+ .So definitely we will retard the timing and adjust accordingly of course, Retarding the timing is the simplest solution and cheapest because the pc5 already has a built in ignition module.
A radiator upgrade is needed and we will make a bigger capacity radiator and will be an option for this kit .An intercooler setup is also on its way along with a stage 2 hiboost option .
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