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yeah, nice difference. feels more than it looks on the graph though.
red was before and black after, only change was the manifold and bit of a play with the map. chris thought it would only need a 15 minute tweak but ended up on it over an hour.
unless you are chasing silly power the standard head is more than good enough. seen a couple of head conversions and they've not tensioned up properly, not saying this is always the case though.
personally for the power you want i'd go with stock head and gasket, deck the block and go for 10:1...
everything in the fuse box under the bonnet and throttle body plug just about covers it. reset brake light switch,never had to do this myself but plenty of people say it needs doing.
you can put tape over the dash and it can't fail, if the tester can't see the light is on they have to presume it isn't on and pass and advise. no reason why insurance would refuse to pay out in the event of an incident.