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Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

Thread: full systems without HTEV valve Reply to Thread
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  Topic Review (Newest First)
01-08-2005 10:24 PM
ndj
Re: full systems without HTEV valve

Quote:
Originally Posted by Zippy
Yes, there is a HTEV eliminator available. I'm sure you can find it by searching for that phrase. If you remove the HTEV, keep the cables attached to the HTEV, but take them off of at the solenoid. If you want the best lower rpm driveability, leave the third cable that goes to the airbox flapper, and leave the flapper in place.

You don't need to remove the PAIR valve. The PAIR valve is mounted to the cam cover. Little or no performance gain will result.

I did just remove my pair valve. but for no great reason, other than I didn't need it for the track. A bit less weight, a bit more convenience when checking valve clearance or changing plugs.
Thanks everybody, this thread has answered all of my questions, and, financial limitations aside, I am now well placed to implement some more mods to the 954.
01-08-2005 3:58 PM
deez
Re: full systems without HTEV valve

Quote:
Originally Posted by ndj
Well yes, I do want you to hold my hand. Before I put down my hard earned money on any add-on part(s) I want to fully research the various options and get others opinions on mods. With bolt-ons, 1/2 systems, 3/4 systems, full systems, HTEV eliminators, power commanders, flapper valve mods, PAIR mods, etc, etc. I want to be pretty sure about something before I go ahead.



Too late. Already modified the mudguard/number plate, fitted brow light indicators, cut-off the cone in the mid pipe and drilled holes in the standard muffler baffle.



For a 954. Hindle Full exhaust, PCIII, remove the flapper and PAIR. Bike will run like a bat out of hell, but also docile and smooth.
01-08-2005 2:16 PM
Zippy
Re: full systems without HTEV valve

Yes, there is a HTEV eliminator available. I'm sure you can find it by searching for that phrase. If you remove the HTEV, keep the cables attached to the HTEV, but take them off of at the solenoid. If you want the best lower rpm driveability, leave the third cable that goes to the airbox flapper, and leave the flapper in place.

You don't need to remove the PAIR valve. The PAIR valve is mounted to the cam cover. Little or no performance gain will result.

I did just remove my pair valve. but for no great reason, other than I didn't need it for the track. A bit less weight, a bit more convenience when checking valve clearance or changing plugs.
01-08-2005 4:08 AM
954RIDER
Re: full systems without HTEV valve

ok, so just stared reading but don't have the pactience to read all the post. I have what I guess you can call a slip on, but also maybe a 3/4 system. I got a custom made system off ebay, it was basically the can welded on to some pipe and the pipe welded onto the stock piece right when it becomes single. I also got with that the stock htev valve casing but the guy gutted all the valves out. now from what I've read the valve box even with out the vales is still restrictive. does anyone make just a piece to replace the box, I thought I saw one on ebay a while back. next ? is if I get a replacement box should I get headers also to make kinda my own aftermarket system or are the stock headers okay? when I took out my htev valves I just dissconnected the metal wire from the round thing, is this okay or should I have done more? and what is the PAIR valve I keep reading about, should I get rid of this also and were is it located on the bike. I know this is alot of ?'s but it would really help me alot, thanks
01-08-2005 3:00 AM
Intimidator
Re: full systems without HTEV valve

Quote:
Originally Posted by ndj
Well yes, I do want you to hold my hand. Before I put down my hard earned money on any add-on part(s) I want to fully research the various options and get others opinions on mods. With bolt-ons, 1/2 systems, 3/4 systems, full systems, HTEV eliminators, power commanders, flapper valve mods, PAIR mods, etc, etc. I want to be pretty sure about something before I go ahead.



Too late. Already modified the mudguard/number plate, fitted brow light indicators, cut-off the cone in the mid pipe and drilled holes in the standard muffler baffle.
no no no no no. You should never fully research this stuff. That way when you end up with parts you don't really like, we can follow you onto ebay and pick up the pieces!
01-08-2005 2:57 AM
Intimidator
Re: full systems without HTEV valve

Quote:
Originally Posted by jaim
This has been a cool thread. Learned a lot. Hmmm, I have a bolt on and a PCIII. I think I will go the cheap route and get the HTEV eliminator, get the bike remapped and ride, ride, ride. That is after I get my suspension reworked.
01-08-2005 2:51 AM
jaim
Re: full systems without HTEV valve

This has been a cool thread. Learned a lot. Hmmm, I have a bolt on and a PCIII. I think I will go the cheap route and get the HTEV eliminator, get the bike remapped and ride, ride, ride. That is after I get my suspension reworked.
01-08-2005 1:10 AM
CBR929RE
Re: full systems without HTEV valve

Quote:
Originally Posted by CBR Riding Fool
The pair valve doesn't fool the EPA. It works the same as Air Injection on a car. There is unburnt fuel in the exhaust, mostly when cold. The added air helps burn it which lowers the hydrocarbon emissions in the exhaust.

But since there isn't a smog check for bikes what the EPA doesn't see removed won't hurt you.
thats true but it doesn't really make all that much difference. low performance cars it probably makes more difference but with how fast the bike engine spins there's not much being added in if you ride in the higher revs (at lower revs sure it adds in some air to help burn whats left) I was just generalizing anyway.
01-08-2005 1:04 AM
ndj
Re: full systems without HTEV valve

Quote:
Originally Posted by deez
We pretty much answered all of this for you on the first page of the thread. If you are putting on a full system, you definitely want to map the bike with a powercommander so it runs optimally. It sounds as if you want everyone to hold your hand to do it.
Well yes, I do want you to hold my hand. Before I put down my hard earned money on any add-on part(s) I want to fully research the various options and get others opinions on mods. With bolt-ons, 1/2 systems, 3/4 systems, full systems, HTEV eliminators, power commanders, flapper valve mods, PAIR mods, etc, etc. I want to be pretty sure about something before I go ahead.

Quote:
Originally Posted by deez
Don't install anything aftermarket on your bike. You would be messing with what the Honda engineers designed, therefore ruining the bike
Too late. Already modified the mudguard/number plate, fitted brow light indicators, cut-off the cone in the mid pipe and drilled holes in the standard muffler baffle.
01-07-2005 6:46 PM
Intimidator
Re: full systems without HTEV valve

Quote:
Originally Posted by ndj
Yes, it laughable that the manufactuers and bureaucrats are so worried about motorcycle noise and emissions when millions of trucks spew black smoke from their loud (but legal) exhausts and damn near burst eardrums with their terrifying air brakes.

So what's the final verdict on the HTEV? If I got an "HTEV eliminator" and a bolt-on muffler, but didn't get a power commander, would the bike run better or worse? (and by "better" I don't mean 2hp more at 11000rpm at the expense of bottom end and midrange with flat spots, misfiring etc.)
I rode my 954 for a couple days after I put on the eliminator and the 1/2 system, without a PCIIIUSB and it ran great....I actually kinda wish I hadn't spent the extra $$ on the PC. Although I'm sure I gained power w/the PC, I just didn't feel it from the seat. Every bike is different though.
01-07-2005 5:31 PM
CBR Riding Fool
Re: full systems without HTEV valve

Quote:
Originally Posted by CBR929RE
and extra fresh air really doesn't change how much bad air is leavinghe exhaust pipe. so it technically doesn't give less emission. you could probably get the same effect the pair valve gives by holding the emissions reader just ouside the tail pipe so that it gets a chance to mix with fresh air before being read. so just as dave said its just a trick to fool the EPA numbers.
The pair valve doesn't fool the EPA. It works the same as Air Injection on a car. There is unburnt fuel in the exhaust, mostly when cold. The added air helps burn it which lowers the hydrocarbon emissions in the exhaust.

But since there isn't a smog check for bikes what the EPA doesn't see removed won't hurt you.
01-07-2005 3:34 PM
KiwiBlader
Re: full systems without HTEV valve

Hey guys,what i'm wanting to do for starters is lock my valve open,I've got a Scorpion can on and wondering what I'd do with the cables to the valve and airbox.What have you done after putting on a full system?I'm guessing that the servo can't be disconnected without setting off the FI light.
Any help would be appreciated----------cables,flapper,o2 sensors etc
01-07-2005 3:09 PM
CBR929RE
Re: full systems without HTEV valve

Quote:
Originally Posted by DavidW
Removing the PAIR valve should improve the exhausts scavenging of the head, but it's main job is to bleed fresh air into the exhaust gases. It's a smoke and mirrors trick because all it is really doing is increasing the volume of the exhaust gases, therefore making the percentages look better in testing! The extra oxygen in the fresh air can also help reduce unburnt hydrocarbons, which is the popping you sometimes hear on deceleration I believe .

If you remove it, you don't need to worry about killing rainforests! Your total emissions will still be only a fraction of your neighbours Jeep
and extra fresh air really doesn't change how much bad air is leavinghe exhaust pipe. so it technically doesn't give less emission. you could probably get the same effect the pair valve gives by holding the emissions reader just ouside the tail pipe so that it gets a chance to mix with fresh air before being read. so just as dave said its just a trick to fool the EPA numbers.
01-07-2005 1:04 PM
deez
Re: full systems without HTEV valve

Quote:
Originally Posted by ndj
Yes, it laughable that the manufactuers and bureaucrats are so worried about motorcycle noise and emissions when millions of trucks spew black smoke from their loud (but legal) exhausts and damn near burst eardrums with their terrifying air brakes.

So what's the final verdict on the HTEV? If I got an "HTEV eliminator" and a bolt-on muffler, but didn't get a power commander, would the bike run better or worse? (and by "better" I don't mean 2hp more at 11000rpm at the expense of bottom end and midrange with flat spots, misfiring etc.)

We pretty much answered all of this for you on the first page of the thread. If you are putting on a full system, you definitely want to map the bike with a powercommander so it runs optimally. It sounds as if you want everyone to hold your hand to do it.

Don't install anything aftermarket on your bike. You would be messing with what the Honda engineers designed, therefore ruining the bike
01-07-2005 11:23 AM
DavidW
Re: full systems without HTEV valve

Quote:
Originally Posted by ndj
So what's the final verdict on the HTEV? If I got an "HTEV eliminator" and a bolt-on muffler, but didn't get a power commander, would the bike run better or worse? (and by "better" I don't mean 2hp more at 11000rpm at the expense of bottom end and midrange with flat spots, misfiring etc.)
I'd bet that it would run worse. As you say, you might get a blip up top, but it will probably be much worse somewhere else. The stock fuelling is designed with all of the emissions stuff in place, basically a restrictive exhaust and intake set-up, so it makes sense that it won't suit an unrestricted set-up. Personally I'd say a PCIII should be the first thing you buy, rather than the last.
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