Quote:
Originally Posted by FR-S Matt
Because a turbo requires a lot more than just stringing up some bolts. Need to tune it, wastegate, BOV, intercooler, oil lines...
To me, a bolt on is an easy part that can be completed in an hour or two with some wrenches and ratchets. I consider a turbo a project, or a wallet denter.
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Exactly what I would define it as too - a simple installation that can be *completed* by anyone with basic tools.
The second you have to strap your car to a dyno or put it up on a lift it's no longer a bolt on. Note that some FI kits would qualify if they come with a canned tune because a re-flash is something an average person can do at home.
Quote:
Originally Posted by Bigmaxy
I'd still call a turbo kit a bolt on, if it's a kit. If fabrication is required etc. It is no longer a bolt on IMHO.
If the engine needs to be cracked open it's no longer a bolt in either. if the sump needs drilling, no longer bolt in. If the sump needs replacing, borderline but I'd still call it bolt in.
Tuning has little to do with it IMHO. Coilovers are bolt in but should have a wheel alignment done. Same thing.
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But tuning is a form of fabrication - you are building (fabricating) a custom software map to match the modifications. Without a re-map your car either won't run at all, or can run badly enough to pop the motor.
Coilovers are a bad example because:
A) you can put it together and get a pretty safe alignment just eyeballing it
B) you can do your own alignment in a garage using tape measures and the string method.