10 replies to this topic

[Agus1601]

Hi guys! I bought long ago an hif 44 totally remanufactured. Was in awesome condition. I have it running for like three years now and I can´t reach same max speed I did with my hs4. It seems to have more torque but nothing really exciting...

 

At the moment my config is:

 

Distributor: 123 at curve 4

Coil: Bosch Grey

Spark Plugs: NGK BP8EIX

Engine: 1310cc + Some modified cam (done in my country)

Compression: It is a high compression. Like 11:1

Carburettor: Hif 44 + K&N (cone) + BBW needle

 

Also, today I decided to open the carb and it was completely black, like something is not running good at all. It seems to have a lot of fuel compumption. I use an old electric fuel pump.

 

What would you recommend me doing?

 

Thanks

Agustin

 

[mingy]

Hi Agustin ,

                        An HIF 44 should be fine for your 1310,  I would recommend you have your engine setup on a rolling road if you know a garage or workshop that has one as, this is really the only way to have the engine setup to run at it,s best.

[Swift_General]

+1. The HIF 44 was fitted as standard to the 1275 Coopers before they went over to fuel injection in the early 90s so is a good carb to have and leaves a lot of tuning potential before you ever have to think of anything bigger. Hard to comment on the rest of you engine as there seens to be a lot of unknowns.

[Anthony30]

Twin HS4 carbs.

[Dusky]

Your sparkplugs are way too cold.

[Mini Manannán]

Like Dusky says, your spark plugs sound a bit on the cold side, an NGK BP7ES would be better, even a BP6ES.

 

 What do you mean the carb was completely black?  The inside of the carb or the outside?  Some pictures might help with that question.

[Dusky]

Bp6 for a standard engine, on hotter engines its a bit of hit and miss to Find the right one :)

[Leonrjohnson]

I have a HIF44 with Cone filter on my 970 S engine. Also have a 123 distributor with no vacuum advance. After lots of road tests and Air/fuel ratio trials, I have found that a BBW needle and Curve F works the best for me. I have 10:1 compression ratio, and a 731 cam.

If I can get mine to work on a 970, then 1310 should be ok too. I also run BP7ES plugs

[Agus1601]

Like Dusky says, your spark plugs sound a bit on the cold side, an NGK BP7ES would be better, even a BP6ES.

 

 What do you mean the carb was completely black?  The inside of the carb or the outside?  Some pictures might help with that question.

The inside of the carb is completely black!!! I will take some pics tomorrow

[Agus1601]

I have a HIF44 with Cone filter on my 970 S engine. Also have a 123 distributor with no vacuum advance. After lots of road tests and Air/fuel ratio trials, I have found that a BBW needle and Curve F works the best for me. I have 10:1 compression ratio, and a 731 cam.

If I can get mine to work on a 970, then 1310 should be ok too. I also run BP7ES plugs

Thanks for your help!!! I will be testing to use curve 6, but I have not a racing cam. Also it feels too rich in low/mid range (2000-3500) but then it goes ok. Also missing some hi speed end, it just went 140kph last weekend

[Mini Manannán]

I've heard that none of the curves on the 123 distributors are ideal, maybe a reasonable compromise, but not ideal...