Pair valve question

[Don Hardcastle]

Ok,
I just got an awesome deal on the HMF CF dual high mount system. Thanks Sageronin and GPW. Here is my question. The standard way to remove the pair valve is to use BDE or someone's block off plates. I am assuming that there are metal flanges that are used to attach the hoses to the block.

Couldn't I just take those flanges off and plug that hole (JB weld or something along those lines). Use a small grinder, grind to a smooth finish then just put the now blocked flanges back on there?

Just wondering.

Don

 

[rtvegas]

Just a beginner question..

What do you gain with a pair valve mod?

 

[Don Hardcastle]

Just a beginner question..

What do you gain with a pair valve mod?

That valve recirculates some of the exhaust gases back into the airbox like an EGR valve on a cage. If you have full exhaust and even some cans. Your bike will back fire and pop. Normally with a full exhaust install, we remove that valve and block the exhaust ports that feed it as well as the inlet hose to the airbox. Saves 2-3lbs off the front of the bike and stops exhaust popping.


Don

 

[BA BUSA]

Just a beginner question..

What do you gain with a pair valve mod?

That valve recirculates some of the exhaust gases back into the airbox like an EGR valve on a cage.  If you have full exhaust and even some cans.  Your bike will back fire and pop.  Normally with a full exhaust install, we remove that valve and block the exhaust ports that feed it as well as the inlet hose to the airbox.  Saves 2-3lbs off the front of the bike and stops exhaust popping.  


Don

No the pair valve adds air to the exhaust to help reduce emissions...they need the extra air to burn up the waste gases

 

[Don Hardcastle]

Ok OK

I knew it was some weight adding tree hugger device.

Seriously, thanks for the correction.

Don

 

[BA BUSA]

No worries Bro...bottom line is it is DEAD weight that goes pop

 

[Don Hardcastle]

No worries Bro...bottom line is it is DEAD weight that goes pop

So do you think my block off plate idea will work?

Don

 

[Don Hardcastle]

 

[Don Hardcastle]

C'mon guys. Someone has to have an opinion about this. I cannot be the first person who thought of doing this.

Don

 

[BA BUSA]

No worries Bro...bottom line is it is DEAD weight that goes pop

So do you think my block off plate idea will work?

Don

JB Weld is some good stuff, probably would work fine. I would rather cut the tubes off and weld or braze up the holes

 

[Charlesbusa]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

 

[BA BUSA]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

You would be welding the flanges of the pair valve tubes...then bolting them back on the motor

 

[Charlesbusa]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

You would be welding the flanges of the pair valve tubes...then bolting them back on the motor

Ohhh!! OK!!

I get it now... it is a little late

That should work! Just make it air tight

 

[goodluck]

if you want i will make you some plates and gaskets and send them your way, rather than you welding up pipes if you want just let me know

 

[Don Hardcastle]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

You would be welding the flanges of the pair valve tubes...then bolting them back on the motor

I was thinking something along those lines. I don't have a welder, so I was thinking about the JB weld to accomplish the same thing. I have a buddy that has a shop, he does exhaust work, I bet he could weld them up tight for me.


I just can see spending $20 on little plates that are already there, when I can block them off for free.

Maybe I am a little cheap.

Don

 

[goodluck]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

You would be welding the flanges of the pair valve tubes...then bolting them back on the motor

I was thinking something along those lines.  I don't have a welder, so I was thinking about the JB weld to accomplish the same thing.  I have a buddy that has a shop, he does exhaust work, I bet he could weld them up tight for me.


I just can see spending $20 on little plates that are already there, when I can block them off for free.

Maybe I am a little cheap.

Don

if you want some block offs just let me know

 

[CAT3]

I think you're better off fabricating your plates.

Cut the plate, drill two holes for screws, and viola!!

I don't think I'd try welding since you'd be welding the engine itself...

You would be welding the flanges of the pair valve tubes...then bolting them back on the motor

I was thinking something along those lines. I don't have a welder, so I was thinking about the JB weld to accomplish the same thing. I have a buddy that has a shop, he does exhaust work, I bet he could weld them up tight for me.


I just can see spending $20 on little plates that are already there, when I can block them off for free.

Maybe I am a little cheap.

Don

Since your not welding the plates yourself, luckily for you a friend can do it, it isn't free, so figure welding wire or braze, welders labor, bam your over $20. In most cases, the non-fabricator will suck up $20 eaasily.

FWIW, I did the same concept on coolant crossover tubes for a friends LS1 Camaro. We cut the connecting pipe off shortly after the mounting base, placed the cutoff portion in a vise and cranked it down. I then folded the vise clamped part over onto itself, and cranked again. Air/water tight and cost was nothing. I would be a little leary of JB Weld, the stuff is good, but subjected to that kind of hot and cold cycle can effect its ability to retain proper seal. GL

 

[Busa Bill]

Your going to find tha spending $20 for block off plates is going to be worth it , Time is money and its going to take you a good while to do what your wanting to do .when it can be done in half the time or less if you had just bought them . flat plates with a gasket or O-rings ,I have seen them both ways . The board Sponsore can get you a great deal.just my .02cents

 

[biggallemore]

well i can tell u this. velocity racing just uses 4 self tapping screws that are about a 1/2 in long. works just fine. this is what they actually send out in there turbo kits.

 

[omslaw]

If you have some aluminum bar stock lying around, you can fabricate your own block off plates. Just cut them to size and drill the holes for the bolts. GSXtacy made his own using that method.

If you spend the $20 for Reaper block offs - that's all they are; aluminum bar stock...and the gaskets for them.