063bug
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Posts: 16
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« on: September 11, 2007, 03:04:46 am » |
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Just wondering if anyone out there has any links on how to do it, what it does, etc, etc. This is just doing some research on plusses and minuses of the operation.
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Bad Bug Two
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« Reply #1 on: September 11, 2007, 08:29:09 am » |
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No pics, but I know that several shops out there can do it. Plus is that you now have three instead of two off idle progressive ports to help with that position. I’ve run them both ways and for me they worked slightly better. I’ve noticed in the past when this same topic was brought up that everyone’s results varied, but I don’t ever recall any one ever saying that it made anything worse! With that said… The only potential minus that I can think of is if someone that wasn't set up properly drilled them different. That might cause a slight variation in fuel delivery from cylinder to cylinder during that phase of transition. Although, even then, I would believe it should be better than not doing it. I do know that Rocky Jennings has a small drill guide set up to ensure it is put in the exact location on all four barrels.I know that if I ever run 48's again, I would have the modification made. Hope this helps!  |
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so67vw
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« Reply #2 on: September 11, 2007, 08:44:15 am » |
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I noticed a slight change in the drivability of my IDAs on the street.... I found the artical in one of my old Hot VWs where Art (ACE) was rebuilding and drilling the progression hole to follow.... Maybe someone has a copy somewere....
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"insignificant other"
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Glenn
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« Reply #3 on: September 11, 2007, 09:00:12 am » |
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I think Art charges $25 per carb, so add shipping and you can get them done by a pro for under $100.
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063bug
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« Reply #4 on: September 11, 2007, 06:53:06 pm » |
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Thanks for your input guys.... now just to wait and see if anyone has a copy of that VW article that can tell me what edition to look in. Thanks again.
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Clinton DdK
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« Reply #5 on: September 11, 2007, 09:33:27 pm » |
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December 1999, it was part of the Engine Blue Printing series.  |
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deano
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« Reply #6 on: September 12, 2007, 05:12:22 pm » |
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December 1999, it was part of the Engine Blue Printing series. Actually, I never added the third hole to my IDAs in this series. While I did have Clyde Berg blueprint them, we never added the third hole, due to my engine's 9.0:1 compression and K-8 cam. Lower static compression and perhaps a larger overlap cam combined would call for such a mod. |
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1967 Heaven
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Clinton DdK
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« Reply #7 on: September 12, 2007, 05:41:29 pm » |
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Actually, I never added the third hole to my IDAs in this series. While I did have Clyde Berg blueprint them, we never added the third hole, due to my engine's 9.0:1 compression and K-8 cam. Lower static compression and perhaps a larger overlap cam combined would call for such a mod.
Yes, Deano but you did cover the third progression hole on page 53 part 18 of the engine blue printing in that issue. |
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deano
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« Reply #8 on: September 12, 2007, 08:18:19 pm » |
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Yes, Deano but you did cover the third progression hole on page 53 part 18 of the engine blue printing in that issue.
Thanks for the better recall.... I did cover the topic, but we actually did not install them on my IDAs. |
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1967 Heaven
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Clinton DdK
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« Reply #9 on: September 13, 2007, 06:04:56 am » |
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So, Deano, how about an update on that engine? |
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deano
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« Reply #10 on: September 13, 2007, 06:42:34 am » |
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Well, I would like to tell you all that I have driven that 2275cc engine thousands of miles, and it runs consistant 12.4s, but I certainly can not. Other than driving it to Nick's Burgers years ago in the Race Shop Ghia, it has been patiently waiting for me to finish my '67. Buddy Hale completed the paint job back in June, and the pan was finished last month. I'm now in final assembly and hope to have it completed for next June.... Nick's Cruise Night.
I can't tell you how many guys have come up to me and talked about "their" version of that 2275cc engine, and how well they run, how quick, and how much fun to storm around their local streets. All good. Can't wait to join you all doin' the same thing, driving a quick VW once again.
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1967 Heaven
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063bug
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« Reply #11 on: September 13, 2007, 10:54:43 pm » |
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Any photos of the car in it's current state Deano?
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elmo
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« Reply #12 on: September 14, 2007, 10:19:20 am » |
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Yeah, this is continuing the straying off topic, but is there a series of articles planned for the magazine about the body work/ paint?
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Semper ubi, sub ubi.
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deano
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« Reply #13 on: September 14, 2007, 11:39:14 am » |
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Yeah, this is continuing the straying off topic, but is there a series of articles planned for the magazine about the body work/ paint?
Yes, I am planning a series on prep and painting this '67, but won't get into bodywork. Now back to our thread on IDAs.... |
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1967 Heaven
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Brianatapg
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« Reply #14 on: September 14, 2007, 04:38:53 pm » |
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The 3rd progression mod made all the difference on how my engine runs on the street. Before this mod I was able to overcome most of the transition problems by running the idle circuit overly rich which is not great for mileage or my plugs. I was told by some to carefully drill the third hole by eyeing the location but could never bring myself to do it knowing that the hole would not be in the correct location on all four barrels.  Being a do it myself kind of guy, I did not want to send them out so I ended up designing a drill guide that allows precise hole locations to be drilled at home or shop for the do it yourselfer. Sounded like a cool tool for the IDA crowd so I tooled fixtures and machined a handful of these and then decided that my equipment just wasn't up to the task of production work. I have since drawn the design in CAD and sent the work out. Anyone interested in these please PM me. Brian |
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Bobby WELKER
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« Reply #15 on: September 14, 2007, 11:33:21 pm » |
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Hello, I've done third hole progression also, driveability is so much nicer. run a 44vent with 190 main 65 idle , runs like a stock carb unbelieable on and off freeway. thanks to Art theren run right out of the box. 2332 on the street and watch out!
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Mr.WhiTe
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« Reply #16 on: September 15, 2007, 07:29:25 pm » |
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i've found this pics. on the samba maybe they can be useful  drilled the third progression holes into buddies 48 IDA's this modification is recommend for street engines since it makes them more driveable...  original  drilled  inside see yaa |
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« Last Edit: September 15, 2007, 07:32:08 pm by Mr.WhiTe »
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From argentina, building my dream bug
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Brianatapg
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« Reply #17 on: September 15, 2007, 08:14:01 pm » |
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The hole location in the picture appears to be too low. At that position you could have just enlarged the original port and achieved the same result. Should have been closer to 12 o'clock in line with the bottom port.
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sweet67
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« Reply #18 on: September 15, 2007, 08:22:04 pm » |
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The hole location in the picture appears to be too low. At that position you could have just enlarged the original port and achieved the same result. Should have been closer to 12 o'clock in line with the bottom port.
Ditto |
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"Life is an opportunity and challenge" - Victor A.
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Dan Prado
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« Reply #19 on: September 21, 2007, 06:03:55 pm » |
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Ditto too. I just got fine hand drills from a hobby shop almost the kind that are used to drill out jets. did my self for 5 bucks
they should stager like this: .
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Hotrodding VW's since 1984
Sick Dogs Racing
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63Vdubmann
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« Reply #20 on: September 21, 2007, 06:19:01 pm » |
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Thought that hole looked a little out in left field  |
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POWERHAUS RACING
TransWest
CaliKinGZ Detailing
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63Vdubmann
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« Reply #21 on: September 21, 2007, 06:40:11 pm » |
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VW Trends did a right up on Jack Sacchette Jay Cee Enterprises on converting 48 IDA's to 51mm or 52mm. Doesn't have any specific pics of the progression hole but a really good right up. Thought you might want to look into it. http://www.vwtrendsweb.com/tech/0308vwt_high_performance_weber_carb/There's also a BADA$$ right up on Andy Costello's Pro Stock bug  . Just do a yahoo or google search for Andy Costello VW drag racing or something like that. What size engine are going to be doing these for just curious that's all. Good luck Chad |
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POWERHAUS RACING
TransWest
CaliKinGZ Detailing
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John Palmer
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« Reply #22 on: September 21, 2007, 08:00:37 pm » |
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Ditto too. I just got fine hand drills from a hobby shop almost the kind that are used to drill out jets. did my self for 5 bucks
they should stager like this: .
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Exactly, the position is the most important thing on this modification. Also, using a "hand held" pin vise and doing it by hand is alot safer than using a drill motor or Dremel tool, IMO. |
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sweet67
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« Reply #23 on: September 21, 2007, 09:06:24 pm » |
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I had my 48's modified by Jack at JayCee. The top hole should be located directly above the bottom hole. All holes should be equally space apart.
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"Life is an opportunity and challenge" - Victor A.
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063bug
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« Reply #24 on: September 23, 2007, 08:51:18 pm » |
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Chad, you're right that was a good article and thanks for all the input from all the others. It now all make sense. And thanks to Clinton Ddk for your information too. Alan. |
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« Last Edit: September 23, 2007, 08:53:05 pm by 063bug »
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tbone53
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« Reply #25 on: September 24, 2007, 01:37:35 am » |
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just curious as to what size drill bit do you use for this |
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Matthew Tolbert
53 sedan
54 ragtop
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Bruce Tweddle
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« Reply #26 on: September 24, 2007, 04:13:20 am » |
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just curious as to what size drill bit do you use for this The holes are 1.0mm. To accuratly get it 1.0mm, first pre drill it to .9mm, then drill again with the 1mm drill. If you just start with the 1.0mm drill, you are guaranteed to have a hole that is bigger than 1.0mm |
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tbone53
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« Reply #27 on: September 24, 2007, 05:02:02 am » |
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thanks bruce  |
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Matthew Tolbert
53 sedan
54 ragtop
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