fuel pump placement

[porschetub]

Can anyone tell me the correct or best placement for a Hardi fuelpump in my 914/6 conversion,notice the 911 is in the engine bay but think this is less desirable for the 914?,thanks.

[Dave at Pelican Parts]

The stock fuel pump for all 70-74 914s (including the Sixes!) was in the right-front corner of the engine bay at the bottom. It wasn't the perfect location, as the heat exchanger dumped hot air right at the pump, and it could on occasion lead to vapor lock. (I've experienced it precisely once in over two decades of driving pre-75 914s.)

Later 914s moved the pump under the gas tank. They also changed the fuel lines through the tunnel. It's probably a good idea to change the center tunnel lines to stainless hard lines anyway, so...

Quite frankly, both locations are viable.

--DD

[porschetub]

Originally Posted by Dave at Pelican Parts

The stock fuel pump for all 70-74 914s (including the Sixes!) was in the right-front corner of the engine bay at the bottom. It wasn't the perfect location, as the heat exchanger dumped hot air right at the pump, and it could on occasion lead to vapor lock. (I've experienced it precisely once in over two decades of driving pre-75 914s.)

Later 914s moved the pump under the gas tank. They also changed the fuel lines through the tunnel. It's probably a good idea to change the center tunnel lines to stainless hard lines anyway, so...

Quite frankly, both locations are viable.

--DD

Thanks Dave,thought there may be a better place,it appears a lot of pumps are put shortly after the tank,would prefer to give it a better enviroment than under the car however???

[The cap'n]

Bosch pumps are usually mounted in a horizontal position, Hardi pumps are mounted vertically. You're gonna have to find a place that will accommodate that. I think under the tank is out.

The Cap'n

[Steam Driver]

Almost all pumps regardless of mfg. would prefer to "push" fuel rather than pull it. So closer to the tank is better if you can figure a way to do it. When I got fed up with pump failures on my 914-6 (three in about as many years, all of them leaking fuel out the electrical connection) I changed to a S-W "double-pumper" mounted in the right rear corner of the trunk, in the corner behind the spare tire. Worked great for at least 15 years (until I sold the car) and there was minimal intrusion into the luggage area.

[porschetub]

Originally Posted by Steam Driver

Almost all pumps regardless of mfg. would prefer to "push" fuel rather than pull it. So closer to the tank is better if you can figure a way to do it. When I got fed up with pump failures on my 914-6 (three in about as many years, all of them leaking fuel out the electrical connection) I changed to a S-W "double-pumper" mounted in the right rear corner of the trunk, in the corner behind the spare tire. Worked great for at least 15 years (until I sold the car) and there was minimal intrusion into the luggage area.

So would you think the heat in the engine bay was the killer of your pumps as Dave mentioned?
Don't think I would mount under the car ,the unit I purchased is NOS and I would like to keep it looking that way.

[The cap'n]

Seems inappropriate to me to purchase an expensive NOS fuel pump (one which was troublesome even in its original application) to use in a non-stock situation. A $100 Pierberg pump works fine, is small, and fits nearly anywhere under a 914.

The Cap'n

[porschetub]

Originally Posted by The cap'n

Seems inappropriate to me to purchase an expensive NOS fuel pump (one which was troublesome even in its original application) to use in a non-stock situation. A $100 Pierberg pump works fine, is small, and fits nearly anywhere under a 914.

The Cap'n

Far call? but how long do they last,this pump is brand new,expect it to last a while,or have you had a bad run with these from new?
The original 914/6 pump was better?,my researth indicates the pump I have is noisey when running and like any don't tolerate dirty fuel or blocked filters.
Value your further comments on this ,thanks.

[The cap'n]

Put it this way. We used to keep Hardi rebuild kits in stock, both at the dealership in the early 1970s and at my own shop as late as the 1990s.

However, my main concern is where you'll find a place to mount it in a vertical position.

The Cap'n

[Steam Driver]

I don't know if heat was the issue with the 914-6 pumps or not. One would think the fuel flowing through it would cool it enough to make that a non-issue.

[porschetub]

Originally Posted by The cap'n

Bosch pumps are usually mounted in a horizontal position, Hardi pumps are mounted vertically. You're gonna have to find a place that will accommodate that. I think under the tank is out.

The Cap'n

Noted in the 911 tech forum theses pumps were mounted horizontally in the early 911's,pretty sure they were used with the 2.2T I have,the instructions in the box indicate both mounting positions also,the one I have is rated for engines over 100hp.
I find it hard to believe these pumps are that bad, I should have researched better
Are you talking about a Pierburg low pressure rotary pump? do you know who sells them?

[The cap'n]

I have made a small mistake, and for that I apologize. Yes, they were mounted in a horizontal position. I was thinking of the Bendix pumps commonly found in SWB 911s. The Hardi pump was used on the 1969, 1970, and 1971 cars with Weber carburettors. I was not mistaken about the not-uncommon need for repairs to the pumps. The Pierburg low pressure pumps are sold by any number of VW and Porsche related aftermarket suppliers.

The Cap'n

[porschetub]

Originally Posted by The cap'n

I have made a small mistake, and for that I apologize. Yes, they were mounted in a horizontal position. I was thinking of the Bendix pumps commonly found in SWB 911s. The Hardi pump was used on the 1969, 1970, and 1971 cars with Weber carburettors. I was not mistaken about the not-uncommon need for repairs to the pumps. The Pierburg low pressure pumps are sold by any number of VW and Porsche related aftermarket suppliers.

The Cap'n

No problem,and yes dead right on the Bendix pumps,thanks for your time.