tr7triumph.com

hello, i have a 1980 tr7 that i purchased i couple of years ago, the prior owner put twin webers on the car and stuck a hose on the vent tube off of the valve cover and just laid it across the engine, well it smoke pretty bad and stinks, has anyone else replaced the carbs with webbers if so what did you do with the hose, also i stuck it on the canister and tried to put a filter on the end of the tube, but the pressure that it caused i had oil coming out of the dip stick, help. thanks chuck [?]

Hi there.
You must try to make something on/in the air filter housing.
So that the gasses from the hose end up in the air filter housing of both caburetors.
I think the best place is afther the airfilter.
It wil be a bit inprovisation but it worjs.
Succes !
Greetings Ilja


TR7 SPIDER FI

That hose is very important as it vents the oily pressurized crankcase vapors back thru the intake tract to be burned in the combustion chambers. It is a Positive Crankcase Ventilation hose, (PVC), and should be reconnected. If there is no vacuum fitting on your non-standard carburetion setup, please drill a hole and thread it to install a male barb fitting on which the hose can be clamped.

It is best that the hose not be installed in the air filter, but down tract to benefit from the intake vacuum.

Mildred Hargis

Just put the hose into a vented bottle which you screw somewhere in your engine bay. I used an old fire extinghuisher visible just left of the oil filler cap ...



Also better for your mixture as it isn't polluted by oily muck.
But make sure it can vent freely.


<center>
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>

I split off with a Y connector off the T in the hose going to the cannister. I then put a connector in the bottom of the air cleaners and connect hoses from them to the Y connector.

BUT, if you are getting that much blow-by, you need to do a compression check and see if you have a broken ring.

Dearest gentle men,

Prior to 1962 vehicles in the U.S.A. vented an engines crankcase vapors thru a bent metal tube mounted in a hole in the side of the crankcase. In 1962, that all changed with the Positive Crankcase Ventilation valve. This one way valve and it's hose vented the crankcase vapors thru a hole in the rocker box or valve cover to a vacuum port just below the carburetor. These vapors were then burned with the normal air/fuel mixture.

This is a good thing. A very good thing. It is a good thing for these reasons: 1. By having the vapors drawn out of the engine by the intake vacuum, oil leakage under pressure from the combustion cycle is greatly reduced.
2. The oil vapors have a slight lubricating effect on the valve stems.
3. The presence of oily vapors emanating from below the engine is eliminated, particularily on engines that are neglected or worn out.

I observe in the photo from our friend in the Netherlands there is a vacuum port in the top of the intake manifold for the master brake cylinder booster. It would be a small matter to install a 'T' fitting and attach the PCV hose. You would lose several pounds of weight where that cannister now sits along with the extra hose.

I respectfully submit gentle men, crankcase vapors be recycled thru the combustion process instead of being vented into the atmosphere.

Mildred Hargis

If you want to burn oil, so be it [:p]
But I don't ...

<center>
<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>

But, I do like that strut tower brace. Tell me, does it make a difference? Is there a perceptable change in the handling of the car in normal driving?

Mildred Hargis

And I like that weber setup as well. How is the driveability?

Rich

1975 TR7 ACL764U

I'm with Ms Hargis on this!
Beans, your car is an environmental hazard venting those nasty fumes to the atmosphere like that!
Shame on you! And shame on your authorities that don't fine you for it!

I know this is not very PC to write in a forum like this,
but deliberately venting crank case fumes to the air we all breathe (and bragging about it!) is even less PC!

Talkin' of PC Odd,have you got the 'Global warming' sticker yet?!!!
Beans,like Mildred,i would like to have your input on the brace bar
thingy.c'mon,spill the beans,Beans!

See ya. Paul

Paid for it - but haven't received it yet...

I was pondering making one of those too. Not sure if it would really be noticeable on the road?

Interesting to know if you really did feel a difference - apart from the weight difference in your purse!

Shaun

http://www.flickr.com/photos/12691409@N08/

Enviromental issues aside, I venture that most of the oily muck is staying in your engine as you do not have a crankcase ventilation system. Fresh clean air needs to get into the engine and oily muck (water vapor, corrosive gases, etc) needs to be sucked out. It doesn't appear that is happening on your set up. And possibly, you are sucking in unfilter air in the process. If you don't want to burn these gases in the combustion process (best), you could built a system where it is burned in the exhaust system, but, you'd still need clean air being drawn into the engine.

With the products in todays gas, I doubt burning oily muck is going to effect performance, as much as accelerated engine damage from a poor crankcase ventilation system.

Damn the enviroment attitudes is why sooner or later our cars will not be allowed on the roads.

TR8

Now, now, Boys. Must we act like mayflys swarming the manure? Could it be that Beans is having a positve effect on the unique flora sprouting in his neighborhood? Whether or not this may be the case, the cleanliness and orderly manner of his underhood is far more presentable than ours out there in the machine shed. Not to mention his original creativity in crafting that cannister. Always remember, there's more than one way to skin an apple.

Mildred Hargis