One good point about the Harrop kit is that the belt is in line with the stock belts.
This is what I was told about other kits
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But a word of warning, and this is important. When supercharging your car please avoid any kit that adds an extended crank pulley in front of the existing pulley. It will put a disproportionate load on the front bearings and catastrophic engine failure may result.
I've had this happen to me. I also know 3 other friends who put a sc kit with this configuration on the car, in every case the front mains bearings failed, spun and cracked the block requiring a new engine
One engine was rebuilt and then pulled down after about 2000ks only to find the front bearings were about to fail.
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