June 21, 201016 yr comment_446398 hey all just need to no if i can fit a 4k"hi-cam" head to my 4k out of a ke55??? went to get mine rebuilt and found out water jackets have cracks in them welding did not help please help me :jamie: Report
June 21, 201016 yr comment_446402 As far as I know there is no difference at all. The "Hicam" was just a loser's advertising ploy when everyone else started making overcam motors! Embarrasses me really... Edited June 21, 201016 yr by altezzaclub Report
June 21, 201016 yr Author comment_446406 from the looks from what other forums are saying its only the emitions that got changed on them and some little other things but the engine is still the same??? I just needed to no only head i can get in my area is off a "HI-CAM" so i thought ill see if there the same lol Report
June 21, 201016 yr comment_446408 marketing. head should be the same! seen the "o2 advantage" on a vzj95r prado with a 5vz-fe? it didn't come with oxygen sensors from the factory and yet it still had the o2 advantage!! maybe the o2 advantage was the o2 molecules that it used in the combustion process? marketing!! Robert. Report
June 21, 201016 yr Author comment_446409 SWEET. thanks guys so much i want the rolla back on the road over driving the old mans land rover lol one more quick question if i was to mill the head and maybe port what would be the most you'd go?? i'm going carby set and headers next month or so? apart from sports exhaust all is just stock Report
June 21, 201016 yr comment_446415 wouldn't go above 10:1 compression ratio and I'd match the ports but not enlarge them much. small diameter keeps gas speed up. Robert. Report
June 22, 201016 yr comment_446532 What rob said. Get your builder to plane the head to the comp ratio you want. It's no good anyone here saying "take 1.5mm off" it's all dependent on your current specs anyway. Edited June 22, 201016 yr by philbey Report
June 22, 201016 yr comment_446537 marketing. head should be the same! seen the "o2 advantage" on a vzj95r prado with a 5vz-fe? it didn't come with oxygen sensors from the factory and yet it still had the o2 advantage!! maybe the o2 advantage was the o2 molecules that it used in the combustion process? marketing!! "O2 Advantage" was a reference to the improved breathing capabilities of Toyota engines as they adopted an almost universal twin-cam multivalve design in the early 90s. Nothing to do with an O2 sensor. Same sort of thing with the "Super Responsive" and LASRE engines in the 80s (Super Responsive was basically the adoption of overhead cams, LASRE was Lightweight Advanced Super Responsive Engine, again referring to overhead cams and EFI improving engine response and revs) Report
June 22, 201016 yr comment_446551 "O2 Advantage" was a reference to the improved breathing capabilities of Toyota engines as they adopted an almost universal twin-cam multivalve design in the early 90s. Nothing to do with an O2 sensor. Same sort of thing with the "Super Responsive" and LASRE engines in the 80s (Super Responsive was basically the adoption of overhead cams, LASRE was Lightweight Advanced Super Responsive Engine, again referring to overhead cams and EFI improving engine response and revs) Super responsive was due to the A series engine being light weight revving quickly, well that is what the marketing booklet I have has in it. Report
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