Holley 2110 on an 1835

[hidesertbrp]

I am working on this car for a buddy of mine. I am not real familiar with this carb but have worked on many carbs in general. I'm just looking for some good places to start on this thing. The carb has been completely gone through (including re-bushing the main shaft). To get this carb on the car, he had a special intake made for it. The intake is about three inches tall, it looks like a mini tunnel ram. Here are the symptoms.

Low erratic idle, can be kept running with throttle though.
Almost no mid at all. To get the car to run requires high revs and a loooooot of clutch slipping. Once it is moving along the car screams. Top-end is not a problem.
At one point I had the car driving and had to back out of it from the mid-range, to avoid slamming a hole,and and it stalled at about 30 mph. Once it is stopped, the car car will start right up.

I have adjusted the dual idle circuits to specs and messed with them from there, the electric choke is hooked up and seems to be working fine. Where should I start on this thing?

[DailyPedal]

For 20 years, I had heard that these carbs had a huge flatspot so I am surprised that people are still trying to make these work. Dean Lowry (rip) had built an 1835 in the late 80s for his kid and put that carb on it. He designed the cam and intake specifically to work with it and to the best of my knowledge, it was the only one to really work. I rode in that car and it worked well but still not as well as most of the dual kits and the Fat singles...good luck and I hope someone can help.

[prerunner1499]

check timing first, set it at 30degrees max advance and then tune the carb.
check for vaccum leaks, then look at the carb jetting again.

Friend has one on a 2017cc and it runs like a top. has a 110 cam. 044 dual port heads. 8.5:1 cr

[Co-Dog]

[QUOTE=prerunner1499;427317]check timing first, set it at 30degrees max advance and then tune the carb.
check for vaccum leaks, then look at the carb jetting again.

Like prerunner said, but check for vac. leaks first.

If it's none of the above, then its likely that the idle circuit isn't working correctly. Unless it was flow tested, that custom manifold is a red flag for me. VW intakes are trickier than they look. I made one and had problems that were similar to what you describe. I was able to verify that the carb worked, but never could get it to idle on my custom manifold.

Don't know the specs for a 2100, but make sure the butterflies were set with the correct opening.

[Wendell #527]

For 20 years, I had heard that these carbs had a huge flatspot so I am surprised that people are still trying to make these work. Dean Lowry (rip) had built an 1835 in the late 80s for his kid and put that carb on it. He designed the cam and intake specifically to work with it and to the best of my knowledge, it was the only one to really work. I rode in that car and it worked well but still not as well as most of the dual kits and the Fat singles...good luck and I hope someone can help.

DailyPedal I sent you a PM about the dual carb set ups. I didn't want to hijack this thread. Thanks

[hidesertbrp]

Thanks for the replies guys. The intake and a small leak in the accelerator pump have made the decision for me. He is going to buy a new carb. I don't mind helping a guy out, but with so many variables, I can only spend some much time for free.

[bajaruner11]

Ahh the old "bugspray" carb.There's a lot that can be going on here, basically your last decision is the best, replace it. However just FYI those carbs only work well when running with a very short duration cam, and functioning heat risers. Otherwise forget it there to much of a hassle to make work compared to whats available out there. One other thing, the rebuild kit for those carbs comes with an accelerator pump plunger that is shorter than the original making that flat spot even worse.
Hope your buddy finds quality replacement.

[Perfect Race]

There is an ad in the classifieds today for 3 carbs. Buy the Zenith for $25 bucks. Find a manifold(they are around), get the right jets and new gaskets. I think Mckenzies or Speed Unlimited has this stuff and a jet chart and do a 15 minute carb rebuild and your done. The Zeniths work awesome and are very trouble free after set up.

[hidesertbrp]

right on. I'll let him know. thanks