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Topic: my first question for bug tech...  (Read 2458 times)

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my first question for bug tech...

« on: September 27, 2005, 10:26:36 PM »
or for anyone who will answer...   I'm in the process of putting my engine together now for my 64 bug.  realizing that I'm gonna have a problem.
 Using a BugPack merged header, and a center mount weber progressive,  I'm gonna need some manifold heat.  so,  is there any reason I cant cut the ends off an old manifold heat tube (with the nice little flange) and mig weld them up-side down to the perfect spots on my merged headers , and have a place to bolt my tubes to my headers..?
 if ya'll agree that it can work.. after I weld the mounting flanged tube in place.. how big should the hole be in my header to allow enough heat to rise to my manifold??  anyone got suggestions?

Offline Ret.Bugtech

my first question for bug tech...

« Reply #1 on: September 28, 2005, 03:35:20 PM »
Well now !   I can only assume that you are building a 1600cc engine and not the original 1200cc 40 hp. They make exhaust headers with the pre-heat flanges already welded on,so why make them.
     As far as your Weber goes, Unless you are adding some other engine mods, like cam, big bore, or head work etc. I think you are wasting your time and money for what little gain you would get in performance. I have watch a lot of folks try to get these carbs to settle down on otherwise stock engines . Seems that they spent more time trying to "dial" them in than they did driving the car on the street. Been there,done that and it just wasn`t worth the hassle
    All of above is just my opinion of course. Its you coal truck. :lol:  :lol:

Guest

my first question for bug tech...

« Reply #2 on: September 28, 2005, 11:33:43 PM »
I'm sorry David, I should have gave you more information.. I'll enlighten you.  first off,  when I first took an intrest in building a VW, I purchased alot of things before I learned what I know now.  I bought 4 bugs about 2 weeks before BP-7.  as soon as I got them home, I came to BP-7 and like a kid in a candy store, I just couldnt resist all the "cool things" that I found.  so I Splurged!!  hey, it was fun..  any way, here's the deal,  one of the bugs I got (66) had a recently fresh engine in it.  the fella said it was a big bore, but thats all i knew.  while at BP-7 I bought a progressive weber kit, a merged header, a nice ceramic phat-boy muffler, among other stuff.  since then I've been learning alot of information that I wish I knew earlier.  now, I have my 64 pan and chassis completely restored and ready for the next step. so, I take the "big bore" out of the 66 and tear it down to see what I've got, with plans of fixing it for my project.  heres the stinkin part. I've got a low mile engine that still looks great inside but its a dern 1641. with slip ins.  so, in order to carry on my project (by the way, now Im low on funds), I decided to go ahead with the 1641 and just make the best of it. so I bought an engle 110 cam and mahle lifters, and started doing some port work on the heads.   In fear of making them worse, I only done some mild "short side radius" work,  so I didnt go overboard.  I did leave the stock valves alone, other than a fresh lapping.  anyway, I am just using this engine to get my car completed and then after I have a nice car, I'll build a nice engine for it.  so a 1641, 110 cam, weber 2 brrl, headers, 009, and mildly ported heads are what I have.  I just need to use the stuff I alreay have and get the car done.  just so you'll know.. I have been building my own (air cooled ) race engines for the last 10 years, so I do understand most of what I read, I'm just new to VWs.  making a set of flanges for some headers is no problem, I just wasnt sure how much air needs to come through the tube for manifold heat.

Offline Ret.Bugtech

my first question for bug tech...

« Reply #3 on: September 29, 2005, 09:16:34 AM »
Hey Guy, You are on the way and there is not much I can tell you that you don`t  know already.
 What are the specs on your Engle cam, lift and duration. Its been to long since I have messed with modifieds. There are so many new "goodies" out there that its hard to keep up with them.
 As far as your manifold heat goes, I think a hole in your "header" pipe could be as big as you could drill it. Look how big the hole is in the flange !!. Maybe just a tad smaller. If you live in the mountains like I do, heat on the manifold helps . I have had engines ice up on me when conditions got right. The folks in Calif. don`t have to worry about things like that I think. The amazing thing about the stock manifolds is that after a few years on the road the heat- riser tubes would be completly stopped up with carbon and most of the time you couldn`t get them opened up.
   The big thing I stress is getting the Ing. Timimg right and that goes for stock or modifieds. Thats got to be right or you will have very costly problems. I think that subjet is the most misunderstood item that a lot of new to VW folks run into due to the "Pullys of many Notches" thing.
    Keep us posted on your progress.

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