valve train question
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starting over
Joined: Aug 2006
Posts: 5,466
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One thing to consider, and possibly why some people have trashed valves at relatively low revs even though they went to type r intake springs, is that there seems to be a general misconception that the type r intake spring is beefier than standard b16/gsr springs. Actually they are lighter wire than stock b16 springs.
Type R springs appear to be matched to the type r intake valve, which is 12 percent lighter than the standard valve. The thinner, oval-shaped wire also allows for more travel before coil bind. It also appears to be a finer built spring if you look carefully at they way they are closed at the ends. A thing of beauty, really, but designed to carry type r valves up and down at gawdawful rpms, not the hevier, slower to move (read that easier to float) standard valves.
Point is, Honda engineers didn't provide just a beefed up spring for its type r application, it provided a fast moving, ligher valvetrain package in order to pick up an extra 200 rpms at the redline. Sticking a heavier, b16 valve in a head with type r springs and cams would be a spoiler, I'm sure, as far as Honda engineers would be concerned, and I'd be willing to bet they wouldn't recommend you go for those extra rpms a lot of people seem to think should be there just by putting type r springs on standard valves.
It could be that putting type r springs on stock b16 valves could increase the chance of float, not reduce it.
I don't have anything definitive to point to other than what I've observed in comparing and weighing parts, what I've read about type r development and common sense, not to mention a general trust that Honda engineers do things the way they do for good reasons.
Also, the type r springs I've weighed are lighter. I'm no engineer, (KJ might pipe in on this) so I don't know if the mass of the spring itself has a dampening affect on its own rate. I suppose it would, as it seems it has to move itself in addition to everything else, but maybe I'm missing something about spring dynamics.
Just some food for thought.
Type R springs appear to be matched to the type r intake valve, which is 12 percent lighter than the standard valve. The thinner, oval-shaped wire also allows for more travel before coil bind. It also appears to be a finer built spring if you look carefully at they way they are closed at the ends. A thing of beauty, really, but designed to carry type r valves up and down at gawdawful rpms, not the hevier, slower to move (read that easier to float) standard valves.
Point is, Honda engineers didn't provide just a beefed up spring for its type r application, it provided a fast moving, ligher valvetrain package in order to pick up an extra 200 rpms at the redline. Sticking a heavier, b16 valve in a head with type r springs and cams would be a spoiler, I'm sure, as far as Honda engineers would be concerned, and I'd be willing to bet they wouldn't recommend you go for those extra rpms a lot of people seem to think should be there just by putting type r springs on standard valves.
It could be that putting type r springs on stock b16 valves could increase the chance of float, not reduce it.
I don't have anything definitive to point to other than what I've observed in comparing and weighing parts, what I've read about type r development and common sense, not to mention a general trust that Honda engineers do things the way they do for good reasons.
Also, the type r springs I've weighed are lighter. I'm no engineer, (KJ might pipe in on this) so I don't know if the mass of the spring itself has a dampening affect on its own rate. I suppose it would, as it seems it has to move itself in addition to everything else, but maybe I'm missing something about spring dynamics.
Just some food for thought.
lighter springs/retainers to go with ligher valves makes sence to me, but does it make sence to anyone else?? thanks!!
turbo hhhmmmm?
Joined: Jan 2004
Posts: 702
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i got itr valve springs with KMS light weight retainers for $125. lmk if you want to up grade. also i know some one selling itr valves for $75
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