| Author | Message | ||
     Geoff Wootton Grand Master Username: dounraey Post Number: 1508 Registered: 5-2012 |
Hi Folks Kelly has sent me 2 collars and dial gauges for my HD8 carbs. These are the carbs fitted to the "series 1" pre 1976 cars. Needless to say the collars are beautifully machined and fit perfectly.    What I really like, apart from the greater precision over the air flow meter I was previously using, is their ease of use. It's just a case of removing the carburetor dampers, screwing on the collars and fitting the dial gauges. The problem with the air flow meter was having to remove both U shaped air ducts that are bolted to the mouths of the carbs - a real hassle as some of the bolts are difficult to access. So, a great tool in my inventory and fantastic value at the cost. I'm delighted with it. Big big thanks to Kelly. Geoff | ||
| Kelly Opfar Prolific User Username: kelly_opfar Post Number: 134 Registered: 7-2004 |
Props to Geoff for being the prototype test subject. I knew the threads were right (because I have the same carbs) but I needed Geoff's help because A. He has a running car and B. He is in the U.S. For all those who expressed interest, I'll put a post in the "for sale" section. | ||
| John Beech Prolific User Username: jbeech Post Number: 106 Registered: 10-2016 |
Superb, Kelly, just superb! Well done. | ||
| Omar M. Shams Grand Master Username: omar Post Number: 932 Registered: 4-2009 |
Kelly - such a star........... and Geoff for the assist... | ||
| Brian Vogel Grand Master Username: guyslp Post Number: 2137 Registered: 6-2009 |
OK, now we're into the "pardon my ignorance" territory for me. What do those gauges measure and how do they measure it? I had thought it was vacuum pressure (or inverse of pressure) but I wouldn't think that would involve the long stems that are shown in the picture that protrude from the base of the gauge. Brian | ||
| Robert Noel Reddington Grand Master Username: bob_uk Post Number: 1213 Registered: 5-2015 |
brass or aluminium could be used for the screw in carb adapters. Steel goes rusty and stainless can be hard to machine. The damper rod is fit to lots of brit stuff so a couple of used damper rods could be machined to fit a dial gauge. digital DTIs can be difficult read in pairs and analogue gauges are cheap used so just glue the adapter to the DTI permanently. make a wooden box for safe storage. The dial gauge method is easier than the power balance check method but no harm in full 8 cylinder power balance as well. | ||
| Larry Kavanagh Experienced User Username: shadow_11 Post Number: 25 Registered: 5-2016 |
Hi Brian, they measure the rise of the carb pistons. You can check if both carbs are in balance by the readings on the gauges. The rise of the pistons causes those long stems to compress | ||
| Brian Vogel Grand Master Username: guyslp Post Number: 2139 Registered: 6-2009 |
Larry, Thanks. I figured that out after having read the "For Sale" ad for the kit. Makes perfect sense, I'd just not seen these gauges pictured when not in use before and they do something different than I'd presumed. Brian |
