Fuel hose for my 356?

[neilbardsley]

I'm thinking about installing one of these primer bulbs to fill the carb floats after the car has been sitting for a while.

http://www.ebay.co.uk/itm/Car-Boat-Mari ... 3641.l6368

Here is the article on the registry https://porsche356registry.org/article/77

What size hose do I need to order? 8mm internal diameter?

http://www.ebay.co.uk/itm/FUEL-PIPE-Bra ... u2oOG1XsRw

[roy mawbey]

Neil,

Maybe I am too cautious and for sure never fitted one so what do I know, but.. an electric fuel pump placed underneath the passenger front wooden floor board might be a better solution.

In saying that I have never cut the steel delivery pipe from the fuel pump to the left side carburettor to install one of those fuel filters. Some seem to be plastic I would not want that.

Since my work this year to restore the complete starting procedure I can say it has transformed the process. The speed of the starter now pushes petrol up to carb to fill the bowls after some if any? evaporation so fast its just not a a problem anymore. I normally drive it several times a week. I only have to depress the accelerator twice maximum when cold before turning the key, even in this cold weather its the same. Left for a week some time ago, the car started again with a few more cranks just a fast.

I do know, the carbs have to be perfectly dry, no leak anywhere, and also the fuel pump must be delivering fuel perfectly for the start up to be perfect. I have had years of trouble and also deliberated on the plunger, but its now proved to me if the starter, the carbs, the fuel pump and the ignition, are all perfect then starting is perfect. Bulbs sort of worry me, if you try pushing too much in and overiding the needle valve that fuel must end up going down the venturi. When do you know you have filled the bowl or bowls?

Maybe others here have had great success with the plunger?

Roy

[neilbardsley]

All points. The total cost of trying this is £9.5 so I will try and report back. A question for you. When you cold start what is our procedure? Presently I pump the accelerator a few times the crank the engine with my foot off. Recently I've been thinking I should crank with my foot on the accelerator to create more pull for the petrol from the tank?

Sent from my X5pro using Tapatalk

[roy mawbey]

Neil,

You have to in my opinion have your foot on the accelerator and have it depressed about 25% down.
after first depressing it to the floor 2 or 3 times. If you have left the car for a number of days remember every time you push the accelerator to the floor it gives a squirt of petrol from the accelerator pump chamber. If the bowls are low on level a few more than usual squirts might assist.
But.. I always apply the foot to the accelerator .

Likewise when the engine is really hot, depress the pedal to the floor then turn the key to start. This process opens up the butterfly's and assists starting. Or it does for me!


Roy

[neilbardsley]

Thank you Roy for passing on your years of experience to a beginner.

[simon james]

Hi Neil. I fitted the exact same bulb to my car, but mine was for hot starting, I found that there was a time window where the fuel would evaporate and air lock, usually five minutes after stopping up to about half an hour or so. Either side of this the car was ok!!!
I made a little bracket to hold the bulb via the inlet pipe to the N/S inlet manifold rear stud, the stud protruded below the manifold so it seemed natural.
Three years later the bulb is ok and I have confidence to go anywhere anytime!!
I'm sure you'll love it!

BTW. Every classic car I've ever had with a mechanical pump has always suffered from evaporation and the subsequent air lock.
Modern fuels apparently.....

[neilbardsley]

Thank you Simon have you installed before or after the mechanical pump? This article is saying after? I think that I've already got a filter after so maybe I will try infront of?

https://porsche356registry.org/article/77

[Burma-Shave]

Hi Neil, I have had a primer bulb fitted for years, makes a huge difference if the car has been sitting. I pump it until it is hard and then poke the throttle 2 or 3 times. After that it starts immediately.

Mine is after the pump. Sorry I can't remember if it is 6 or 8mm ID.

[Burma-Shave]

PS I have an additional filter after the bulb, then it is on to the carbs.

[neilbardsley]

Thank you. I was considering which side of the filter to put it on. I also have a filter between the pump and carbs. Must admit I've never had a hard accelerator pedal.

[Burma-Shave]

I mean the pump the bulb til its hard, meaning the carb bowls are full.

[simon james]

Neil, I fitted mine BEFORE the pump, it seemed the tidiest place to fit and it had the added bonus of leaving the factory hard pipes untouched!
I've primed exactly as Johnny says!
BTW it's the 8mm version!!!
You'll love it!

[jenskalmer]

Buy an electric fuel pump. Place it under the fuel tank. There's plenty of room to fit it and in case your fuel pump stop working then you got a spare pump you can use.
The pump I have got is a primer pump and it can be used as a normal fuel pump. I had a problem with my engine driven pump so I installed an electric pump in stead of the normal pump.
Soon I'll fit the engine pump again, but I'll leave my electric pump in my T6.

I have been so pleased with it so I'll installed it in my other T5.
The cost is around £60 and it takes max 1 hour to fit it.

[Merv]

I like the inline electric pump under the floor. An added advantage is that if the diaphragm fails on the mechanical pump, you can still drive.

[neilbardsley]

I've been lazy and I haven't installed. I found that the battery wasn't charged enough so I've bought a conditioner. Since then the car has been starting on the point.