A Kadrons carb walk-thru

[storm]

New to Kadrons, but not new to vw's. First time installing these carbs on a 2027 engine. Has about 1500 miles. At first broke in engine with a Weber progressive. After that installed Hpmx 44s ran ok but at that time when gas was $3.50 gallon was not getting good mileage. The engine ran good at all rpms. So talked to other club members and they recommended me to look into Kadrons. Decided to contact Jeff at Kaddieshack. He put together a set 40s w/32 vents. Put the carbs on follow all of his instructions. All is good. Started engine adjusted mixture screws per his you tube video. When I build an engine I include 3 gauges oil temp, oil pressure, and cylinder head temp. It's just to know what's going on back there. Upon driving the '66 bus with a freeway flyer trans, notice a higher head temp on the 1&2 side. 375-410 degrees. Not comfortable with that. 3/4 side 285 degrees. Oil pressure 20 at idle 42 at 60 mph. Oil temp 185. All of this on a 85 degree day. Contacted Jeff via e-mail and in a short period of time responded. He indicated to me to check for vacuum leaks and other important steps. Check those steps one step at a time. That means what I change made a difference. A good idea was to switch carbs side to side to see if it was a carb issue. Did that, but no change on temperature 1/2 side. Read somewhere on the samba an article about the idle circuit can be block via the gasket interference. So, look on the 1/2 side, change to a new gasket between carb and manifold and where the idle circuit cut the gasket to exposed more of the idle port. Well that made a difference. The mixture had to be rich in up and the temp on 1/2 side came down to match 3/4 side. But this is only when the engine is idling. Took out for a drive to put a load on. As I was accelerating pulled good, when the bus reached the 60 mph I got sneezing out of the carbs transition fron idle jets to mains? Jeff at Kaddieshack jetted these carbs, I know that one can build the same engine twice and get two different jet combinations. I am NOT blaming the carbs. Kaddieshack is good to walk you thru to get your ride going. I asked Jeff to send me fatter jets, even thou he thinks its something else. It could be. I respect his judgment. Stay tune to see what happens. G.
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always ready to learn and give advice

[Lingwendil]

Mph is no use, we need RPM to troubleshoot properly... also, 2027 tells nothing without actual details.

Elevation?

What heads? What valve sizes?

Cam?

What exhaust? Type/diameter...

Jets? You should have the numbers stamped on the jets, 55idle, 130main is stock, if Kaddie Shack pulled that crap where he won't mark the jets or tell you the size I would buy elsewhere and start over on jetting to be safe. Aircooled.net is the absolute best place to buy jets. They are marked and come in more sizes than the "other two guys" provide them in. Without knowing for sure what elevation you are at or what jets are in there now you are sort of in the dark, but going up a size on your idle would be a good start. (60mph with a freeway flyer is pretty low RPM for proper cooling in a bus btw)

Timing? Sputtering can be detonation from over advance. Grab a timing gun, do not set it statically. My kadrons behaved just as sputtery around 2600RPM until I checked the advance and found I was at 35° total, I backed it down to 31° and the issue disappeared. Had a flat spot off idle until I went to an SVDA (that i recurved myself) from a german 009, now they run perfectly.

Almost every carb problem end up either fuel pressure or electrical/ignition in nature once jetting is down correctly.
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73 super beetle thread http://www.thesamba.com/vw/forum/viewtopic.php?t=649622 Back on the Road!

Modify your Kadrons for SVDA http://www.thesamba.com/vw/forum/viewtopic.php?p=8115884#8115884

Cast iron VJU4BR8 SVDA reference thread- https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

Need replacement filters for original Kadron aircleaners? WIX #42087 is a perfect fit, as is Napa Gold #2087!

[clonebug]

Just because the jet has numbers on them doesn't mean they are correct.

I had a brand new jet marked 140 and when measured it was 170 so don't trust too much.

Get a set of tools to measure them if you really want to know whats going on.
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[storm]

Storm here, yes, the jets are not marked. So Jeff from Kaddieshack knows but I don't. I also have a set of jet gauges. So I measure, but I am not telling you what I have. Jeff is going thru the step by step process. He is the carb geru. 2027, 78.8 x90.5, Scat 110 cam, Mofoco 050 heads, 40x35.5 ported, svda Ac.net dissy w/Pertonics ignition. Sea level, 1-1/2 sidewinder A-1, other Gene Berg goodies. Rancho trans geared 4.1 at wheel. 60 mph at 2800rpm. Have tech. No cooling issues. Have oil thermostat and cooler. Doghouse fan with thermostat and flaps. Engine built by me carefully with attention to details. G
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always ready to learn and give advice

[Lingwendil]

what is your total timing advance?
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73 super beetle thread http://www.thesamba.com/vw/forum/viewtopic.php?t=649622 Back on the Road!

Modify your Kadrons for SVDA http://www.thesamba.com/vw/forum/viewtopic.php?p=8115884#8115884

Cast iron VJU4BR8 SVDA reference thread- https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

Need replacement filters for original Kadron aircleaners? WIX #42087 is a perfect fit, as is Napa Gold #2087!

[VWCOOL]

2800rpm at 60... Hmmm maybe check your tacho accuracy

I love Kaddies, have daily driven and track-thrashed them plenty!

[vwinnovator]

[rockurob]

[67rustavenger]

[Lingwendil]

[storm]

Found out that a small crack in the intake manifold on #2 were balance tube in connected. Put a little jb weld and sealed fitting and temp went down to match other cylinders. 285 degrees on a 92 degree day. When going faster like 60 mph 3200 rpm temps went up to 310 and a lean sounding pop once a while. Kaddieshack sent me +1 main jets and temps went down. All is good. G
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always ready to learn and give advice

[[email protected]]

[storm]

Roy, are you sure I purchase these heads 15-18 years ago. Can't remember, As with the other people that responded to this thread, I am simply saying that I had a problem. Kaddieshack help me thru it. Either it was a carb issue or a another problem not related. They (Jeff ) was kindly walk me thru the various steps. All it was a small vacuum leak on cylinder 2 manifold. Most likely my fault. Who cares about what jet number. The bus purrs down the country road. And when it's safe to do so, I stump on the pedal an their she goes. G.
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always ready to learn and give advice

[MConstable]

[kevlarian]

[kevlarian]

[storm]

Storm here, Mconstable. If this thread is worthless to you why do you even bother to respond. Other Vws hoppy east found this thread informative.
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always ready to learn and give advice

[storm]

Kavvlarian, .82 4th gear w/3.88 r&p. w/ redux gears big nut. Tall gearing. My rpm is problemly to tall. But the engine pulls good with a 110 cam. Tires 195/70/15. No cooling issues. Also the kads runs fine at idle 850 rpm. G
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always ready to learn and give advice

[kevlarian]

[MConstable]