7 replies to this topic

[minifan333]

This is my situation
1380 engine with hif44 carburettor
and minimania kit conversion
http://www.minimania...4/InvDetail.cfm
We are using this fuel regulator
http://www.minimania...3/InvDetail.cfm
The problem is..regulator is not working.
The engine start ok,but after 16-20 seconds fuel overflow from
carb
I have some questions
1)How to setup correctly this regulator?If provide schemes or
other kind of help you will help me.
2)0.3 bar is the correct pressure for carburettor?
3)The guide talks about a "001 mechanical restriction"
what is and where to get it?
Thanks

[dklawson]

Oh My !!!

Please tell me you did NOT buy that regulator for the price listed in the web link. The Holley regulator is available from other sources (like Amazon.com) for about 1/3 what Mini Mania charges.

.3 Bar is too high. For an SU cab you want to set it lower, closer to .2 Bar MAX.

The Holley regulators should adjust by loosening the jam nut on the top, then turning the adjusting screw with a hex wrench. To do this accurately you have to have the pump running and a pressure gauge on the discharge line from the regulator. Alternatively the Holley regulator has a tapped port on it where you can permanently mount a pressure gauge. Holley regulators are available in a couple of different pressure ranges. If you cannot lower the output pressure to 0.2 Bar, you have the wrong one.

The high fuel pressure you currently have may just be overpowering the float valve in the HIF carburetor. Try the 0.2 Bar pressure setting first to see if the situation improves. If it does not, then you may need to adjust the float valve in the carb so it shuts off at a lower level.

I have no idea what is meant by adding a mechanical restriction. I don't see why you would need one if you have the correct pressure.

[minifan333]

Thanks for reply.
This ******* regulator piss me off immediately
so i decided to buy an elettric fuel pump.
I have a 1380 engine with hif44 carburettor
i have the spi tank,is good this fuel pump
or i need the fast road instead?

http://www.minisport...AC476087-K.html

Is better the solid or the interrupter?

http://www.minisport..._FAC40105K.html
Thanks

[bmcecosse]

The SPi pump is far too high pressure - can you not use a normal mechanical pump -I'm not sure if the SPi block has a hole for the pump -or indeed if the cam has a lobe for it.......... But perhaps you don't have a standard cam anyway........

[minifan333]

The SPi pump is far too high pressure - can you not use a normal mechanical pump -I'm not sure if the SPi block has a hole for the pump -or indeed if the cam has a lobe for it.......... But perhaps you don't have a standard cam anyway........

I have a new engine with the hole for the pump(is on the back of the engine).
Can i put the mechanical pump with the standard spi tank?

[dklawson]

As Roy said the SPI pump will supply too much pressure. Others more familiar with the SPI will have to tell you how to remove or bypass the SPI pump. Others will also have to tell you if and how to fit a mechanical pump to an SPI engine. That is something I have not done.

I do not understand why MiniSport sells the particular Facet interrupter pump you provided a link for. Its pressure is a bit too high for SUs but is probably OK for Weber carbs. The solid state (brick) Facet pump in the second link is perfectly fine but it will be noisier than the interrupter.

If you are supplying the Holley regulator from the SPI pump... that may be your problem. I don't think that regulator was designed for the kind of input pressure you will get from a fuel injection pump. If you use the solid state Facet pump you provided the link to above you will not need the regulator. If you use the interrupter pump you will need the regulator but you will only be asking it to drop the pressure about 1 to 1.5 PSI instead of 100 PSI or so.

[minifan333]

As Roy said the SPI pump will supply too much pressure. Others more familiar with the SPI will have to tell you how to remove or bypass the SPI pump. Others will also have to tell you if and how to fit a mechanical pump to an SPI engine. That is something I have not done.

I do not understand why MiniSport sells the particular Facet interrupter pump you provided a link for. Its pressure is a bit too high for SUs but is probably OK for Weber carbs. The solid state (brick) Facet pump in the second link is perfectly fine but it will be noisier than the interrupter.

If you are supplying the Holley regulator from the SPI pump... that may be your problem. I don't think that regulator was designed for the kind of input pressure you will get from a fuel injection pump. If you use the solid state Facet pump you provided the link to above you will not need the regulator. If you use the interrupter pump you will need the regulator but you will only be asking it to drop the pressure about 1 to 1.5 PSI instead of 100 PSI or so.

Thanks for answer,so i will buy the road pump
http://www.minisport..._FAC40105K.html
Do you think for an hif44 on 1380 with 276 cam this road pump is good?Or fast road is better?
I have to buy also the filter fuel king?
http://www.minisport..._FACFPR004.html
Thanks

Edited by minifan333, 24 May 2011 - 08:29 PM.

[dklawson]

Which pump is better depends on several things, namely how you are going to use your car. In almost all instances, the road pump will be fine and it will be your least expensive option. I cannot speculate on the suitability of these pumps with your engine build specs. Others who have made similar changes will have to offer their comments. However, for most street cars either of these pumps will supply sufficient fuel. Remember that the pump does not FORCE fuel into the engine, only into the float bowl. Once fuel is in the float bowl the fuel is sucked into the carb by vacuum. Therefore, the pump only needs to deliver fuel fast enough to the engine to maintain the proper level inside the float bowl.

Road Pump (Facet solid state brick)
Low-cost, 2-3 PSI. The lower pressure is correct for the SU carb and therefore... no regulator (no Filter King) is required. However, you should put a disposable filter between the pump and carb.

Interrupter Pump (Facet red top)
Higher-cost, 4.5 PSI. The higher pressure may cause your SU carb to flood. Therefore, you WILL need a regulator to lower the pressure to about 3 PSI. You have the Holley regulator. If it is not damaged by the SPI pump it is not hard to adjust and will work well with the interrupter pump. As above, you will want a disposable filter between the pump and carb. HOWEVER, if the Holley regulator is damaged, or if you simply want to use a Filter King, the Filter King will function as both a regulator and a filter (meaning you would no longer have to use the Holley regulator). The Filter King would go between the pump and carb.

However, understand that you do not "have" to buy the Filter King. That is up to you. Your Holley regulator and an inline disposable filter will achieve the same result.