Recent posts

#1

Maintenance and Modifications / Re: Jet height HIF 44

Last post by cstudep - May 08, 2024, 08:29:00 PM

I need to get this done on mine, I highly doubt mine will look that good though. Where is the best place on the exhaust to weld the bung in? After the Y pipe I assume but does it matter how far past? I know you are supposed to mount it so that it is pointed up a bit to keep moisture out of the sensor.

#2

Maintenance and Modifications / Re: Jet height HIF 44

Last post by 94touring - May 08, 2024, 08:14:42 PM

Thats a fancy bung!  Show quality bung work 

#3

Maintenance and Modifications / Re: Jet height HIF 44

Last post by bikewiz - May 08, 2024, 07:43:04 PM

Figuring that with all of the needles I have they won't do much until I can get good data, so I started down the path of getting the AFR gauge installed. Something to do on a dreary day off.
Welded in the bung, got the exhaust reinstalled, and cut a hole for the gauge. I just need to wire the power in and get tuning.

#4

The Lounge / Re: Freon costs

Last post by 94touring - May 08, 2024, 08:57:01 AM

I see 1 lb bottles of R12 for $40 online.....

Dan do you have a vacuum pump to evacuate and dry the system?

I do and 2 bottles of r12.  I have the replacement line to fix the one that cracked.  I just have never gotten around to it and don't drive it enough to be motivated. One day!

#5

The Lounge / Re: Freon costs

Last post by MiniDave - May 08, 2024, 08:44:45 AM

I see 1 lb bottles of R12 for $40 online.....

Dan do you have a vacuum pump to evacuate and dry the system?

#6

Maintenance and Modifications / Re: Jet height HIF 44

Last post by MiniDave - May 08, 2024, 08:43:12 AM

I run a BDL (currently) or BDK needle in my car with similar specs......but Dan's right - if you put the meter in you'll know exactly where you're at. And I agree with Michael, mid range and WOT are where you want the mix just right. A little rich at idle doesn't hurt anything.

I'm not sure the jet height is critical, mostly you want to know where you're at on mixture and set the jet height to get what you're after. Needle size is more important. Jet adjustments are just to fine tune the mixture.

#7

Maintenance and Modifications / Re: Jet height HIF 44

Last post by MPlayle - May 08, 2024, 07:42:45 AM

Perhaps a slightly leaner needle?  All of the needles have basically the same idle stages.  it would be the mid-range and WOT stages that you may want different.  It can be a bit time consuming to find needle options that give what you may want.  Finding the desired needle through a supplier becomes the next challenge.

I use the "MintyLamb" site to sometimes visually compare needle profiles.
http://www.mintylamb.co.uk/suneedle/

#8

Maintenance and Modifications / Re: Jet height HIF 44

Last post by 94touring - May 08, 2024, 06:00:35 AM

Gotcha. 35 degrees all in is probably too much but you'd really need to dyno it to see. Mine stopped making power around 32 degrees.  Running 94 octane will at least help keep it from detonating depending on if it likes that timing in conjunction with what compression ratio and cam you're running. 

As far as jet height goes....install the damn wideband lol.  Till then you're guessing. 

#9

Maintenance and Modifications / Re: Jet height HIF 44

Last post by bikewiz - May 08, 2024, 05:39:46 AM

Curious, why aren't you running a vacuum advance?

I'am. I edited the wording to "vacuum disconnected" I set the static timing to 10 degrees without the vacuum attached, most of the British guys recommend that as a starting point. With the somewhat lumpy cam this engine has, the Haynes recommendation of 8 degrees and 900 rpm idle doesn't work.
You also get tons of guys that "just turn the distributor until in runs right" I found a pretty stable idle with it set like this.

#10

Maintenance and Modifications / Re: Jet height HIF 44

Last post by 94touring - May 07, 2024, 08:35:38 PM

Curious, why aren't you running a vacuum advance?