I'll stir up the damn hornet's nest again on behalf of everyone else.... :goofy:
What's the purpose of the block-off plates and why should people add these (very reasonably priced and well-made) items to their bike?
A somewhat bastardized drunk explaination..... the pair valves inject air into the exhaust to mix the air with the exhuast gases and reduce emissions. .... A side effect is that the gases will burn and you get and occasional "pop" from your exhaust. -- You could just plug the hoses up and be done with it, but if you like a clean engine bay, you can strip the guts out, and cover it with these plates. The engine looks more sano....
Plz anybody chime in if you have more explaination.......
deltaboxii
These are quality pieces! Put me down for a set for my '01. Will get the money to you this week.
I have a set of these and am very happy with them. When I got them it motivated me to remove the PAIR system, and synch the starter valves while I was at it. Doing that really does seem to have smoothed out the little just-off-idle jerkiness. It wasn't very bad, but now is basically nonexistent.
However, one small thing: my plates weren't completely flat and I could get a .002 feeler gauge under them when bolted down. Yeah, that's pretty much a non-issue, but I pulled them off and filed them flat so there was zero clearance. I also used the reed valve rubber gaskets to seal everything up. I didn't remove the reed valve, just filed down the bolt head and was good to go.
Yes - I still have these. - As a btw, during the week I usually work 60 + hours and quite often I have to go out of town --- so on these plates, I ship on Saturdays.
I'll stir up the damn hornet's nest again on behalf of everyone else.... :goofy:
What's the purpose of the block-off plates and why should people add these (very reasonably priced and well-made) items to their bike?
A somewhat bastardized drunk explaination..... the pair valves inject air into the exhaust to mix the air with the exhuast gases and reduce emissions. .... A side effect is that the gases will burn and you get and occasional "pop" from your exhaust. -- You could just plug the hoses up and be done with it, but if you like a clean engine bay, you can strip the guts out, and cover it with these plates. The engine looks more sano....
I've never heard such a sound from my bike.
Last year saw the topic http://www.vfrdiscussion.com/forum/index.php/topic/78499-new-pair-block-off-plates-mello-dudes-garage/and I decided to make this modification.
After a 12,000 km behind I am disappointed in this mod:
the engine runs less stable idling;
between 2k-3k rpm torque down a little;
cold start requires more turns of the starter.
Maybe I did something wrong, or maybe my '04 vfr has another problems that appear in the background of this modification.
Someone was doing comparative tests on the dyno (or any other instrumental tests) with a PAIR and with block-off plates? Or are guided by subjective feelings?
The plates are great, but mine weren't completely flat. I had to do some filing to get them really flat. Also I ground down the nuts on the reed valves so I could use the rubber gaskets to help seal the plates. Mine felt smoother after I was done. But of course that's purely subjective.
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