surge tanks?

[eliotmansfield]

Try googling "Deutsch sealed electrical connector." as this is what was on the item description. (e b item number 160011171045)

From: mitsuko [mailto:p.carlier@pandora.be]
Sent: 10 August 2006 09:56
To: megasquirt-fuel@msefi.com
Subject: surge tanks?



Speaking of surge tanks .

I've never been able to source the electrical isolated
connector to feed 12V to the pump inside .
I had to machine it myself .

Pat




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This post is at:
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Posted by email.

[jonfx4com]

I tried a facet gold top low pressure fuel pump to fill a surge tank before the HP fuel pump and it was a hopeless case. The flow rate of the HP pump was way higher than the LP pump and the surge tank was empty within seconds of the HP pump running up. Result was a dead HP pump. You need to look at the flow rating of the LP pump and compare it with the flow rate of the HP pump when its holding 43PSI. The calculation is surprising, you will need a hell of a LP pump to keep up with the HP unit. I suggest you mod the tank and fit an in tank unit, it will save you lots a grief later in my experience. If you look here http://www.fuelsystem.co.uk/new_page_8.htm you will see that my HP pump holds 3 BAR at around 3 litres a minute but a facet competition LP fuel pump can only pump 35 Gals / Hour which is 2.6 Litres / Minute. Result is an empty swirl pot! I suppose if you find a BIG LP pump it can be made to work but then your paying money to bodge the job when less money will do it right. Jon Jon
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Posted by email.

[jonfx4com]

Hi Roger, yes that was how I killed my first HP pump, they don't like pumpimg scalding hot fuel and vapour much, in fact they quickly refuse to do it anymore! I dont doubt that there are folks out there getting away with it but I could not recomend it to someone setting up a new system after already costing myself a small fortune trying the "shortcut methods". Jon
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Posted by email.

[simonbos]

I killed a couple of pumps as well trying to get the surge tank to work. Eventually I just cut a hole in the top of my fuel tank and used a Honda Civic in-tank pump with a custom top plate (I needed it to be rectangular). Cheers, Simon
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Posted by email.

[renns]

eliotmansfield wrote: Renns, what sensor did you use for the fuel pressure monitoring? - has some cheap honeywell sensors come back out? I'm running a honeywell sensor that was sold on ebay a while back. It requires 5v supply, and sends a 0-5v signal back, to interfacing is easy. I'm splicing into the TPS harness for power. Roger.
1979 Mazda RX-7, running MSnSExtra029L for fuel and spark control on a turbocharged, intercooled, and (of course!) injected 13B rotary.
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Posted by email.

[Fastest95PGT]

sperry wrote: I made my surge tank out of a small oxygen bottle and just tapped and sealed the fittings and never saw a drop of gas! you could use a propane bottle from autozone or something but make sure you fill it up with water before you pop the saftey valve out total project cost wil be 10 bucks for bottle and fittings Do you have a website about this? This sounds like about the most cost effective way for a DIY surge tank yet! I'm not confident enough in my welding skills to make my own.
1995 Ford Probe GT ~ Megasquirted & Boosted 275whp/242wtq @ 5.5psi ---- 317whp/287wtq @ 8.5psi ^^^ (thanks to MSnS-E and dyno tuning by me!) 2003 GSX1300R (Hayabusa)
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Posted by email.

[renns]

jonfx4com wrote: I tried a facet gold top low pressure fuel pump to fill a surge tank before the HP fuel pump and it was a hopeless case. The flow rate of the HP pump was way higher than the LP pump and the surge tank was empty within seconds of the HP pump running up. Result was a dead HP pump. Jon, How was your return connected? If your return line from the regulator also goes back to the surge tank, then the low pressure pump only needs to provide the fuel consumed by the engine. Any fuel not consumed is returned for the efi pump to send through again. Roger.
1979 Mazda RX-7, running MSnSExtra029L for fuel and spark control on a turbocharged, intercooled, and (of course!) injected 13B rotary.
-------------------- m2f -------------------- This post is at: http://www.msefi.com/viewtopic.php?p=135509#135509 -------------------- m2f --------------------


Posted by email.

[renns]

jonfx4com wrote: I tried a facet gold top low pressure fuel pump to fill a surge tank before the HP fuel pump and it was a hopeless case. The flow rate of the HP pump was way higher than the LP pump and the surge tank was empty within seconds of the HP pump running up. Result was a dead HP pump. Jon, How was your return connected? If your return line from the regulator also goes back to the surge tank, then the low pressure pump only needs to provide the fuel consumed by the engine. Any fuel not consumed is returned for the efi pump to send through again. Roger.
1979 Mazda RX-7, running MSnSExtra029L for fuel and spark control on a turbocharged, intercooled, and (of course!) injected 13B rotary.
-------------------- m2f -------------------- This post is at: http://www.msefi.com/viewtopic.php?p=135509#135509 -------------------- m2f --------------------


Posted by email.

[Fastest95PGT]

And before anyone tells me that in http://www.sdsefi.com/techsurge.htm the fuel bleeding out of the fuel pressure reg is going back into the swirl pot- forget it! After 5 mins in traffic the recirculating fuel gets so hot it starts vaporizing in the lines

I understand the argument here. However.. if the fuel was vaporizing (I read this as the fuel turning into a gas), wouldn't it float to the top of the surge tank and return to the fuel tank?

[Fastest95PGT]

I got a response from the water filter web page owner. He said he's had it on his car for 3 years now without any problems other than one small leak that developed on one of the top fittings.

As for doing it again, he said he would definitely have no problem using the same technique next time around. However, he's seen a water/fuel separator for larger trucks in the local parts store which looks more "carish" and has threaded IN/OUT ports to make the install even simpler. Does anyone know what this fuel/water separator is called so I can go check them out?