@kisoia - Its a problem with almost all 911 MFI manifolds, they are made from magnesium. Mag is not very compatible with water and when these cars sit for a long time, you get this problem.
How do you center the drill exactly over the hole? Maybe you have allready answered this somewhere sometime, but im curious. And why did you glue the part, is it because the corrosion, to prevent the galvanic corrosion, or did you find it easyer that way?
Thank you for your time and thank you for making theese videos.
Great work, it has been brought up before but why not bore out the throttle body and "upgrade" so to speak. So new shafts, butterflies ect. Which would help with flow, thus a better running engine??
@hamza3608 - Finding oversize throttle plates with a 80 degree seat angle is pretty difficult, but this would definitely be a better solution for performance. I do this on Weber carbs all the time, but Weber T/plates are much easier to find.
Great repair, yadayadayada, but how about showing how you find the center of the throttle bore and shaft hole? Milling the parts is the easy part. Showing the alignment procedure would really show what a magnificent machinist you are and would be great advertisement for your shop!
@CoolasIce2 - Hmm, show you how I do everything? Dude, that's how I make my money, I've shown you enough to get your creative juices flowing. If you want a personalized video made just for you, contact me.
Oh cmon John to any machinist it is no secret. He uses a co-ax indicator. The repair machinists best friend. Takes about 30 seconds to find the center of almost any size hole between .125"-8.0+" Plenty of youtubes on using them. Also good for finding the distance between hole centers accurately and quickly. Cheap Chinese ones start at around $60 on eBay. Good ones are $300+ Love your videos, youve taught me a lot about automotive machining.
@fiatnutz Creative juices they do, I have been watching for a long time, and am inspired to find a mill and a lathe and make all the parts I've dreamed about. Since I've found this place I have started looking into sand casting as well.I wished I lived nearby so I could have my VR6 Setup by you. After the extensive work I am putting into the rest of the car, custom built electronics, and VGT turbo it would be proper. My existing skill set combined with these skills would be amazing.Give classes?
@g60scuzz - I have a year long course that covers everything that's in my book and a lot more. It's not cheep, but you get a lot of personalized training.
@MrGuvEuroman mister what are you talking about? dont even post a coment if you have no idea how carburator works (venturi effect etc) and for that coment from ip161314, whats wrong with tight tolerancees and a glue that tube isnt going anywhere and isnt under any pressure, omg!!
@CoolasIce2 finding the centers or the bores is basic milling. there are several ways to do so. Subcribe to Mrpete222 he shows alot of basic machining practices.
This is probably gonna seem like a stupid question but why couldn't it just be left borred out? What effect would the larger diameter have? Great work by the way!
@ip161314 I can't answer for why he chose to glue it, but throttle bodies experience low temperatures and often bonding metals is stronger than even welding. Gluing is definitely the easier option and would work perfectly due to the low temperatures and large surface area. Many chassis are bonded, not welded or riveted. :)
John- What was the source of the corrosion requiring the repair? Is this a common problem on these TBs?
Thanks
kisoia 2 months ago
@kisoia - Its a problem with almost all 911 MFI manifolds, they are made from magnesium. Mag is not very compatible with water and when these cars sit for a long time, you get this problem.
fiatnutz 2 months ago
what is the camera you use?
farias615 2 months ago
@farias615 - Fuji S9100
fiatnutz 2 months ago
@fiatnutz thanks john
farias615 2 months ago
Hi there!
How do you center the drill exactly over the hole? Maybe you have allready answered this somewhere sometime, but im curious. And why did you glue the part, is it because the corrosion, to prevent the galvanic corrosion, or did you find it easyer that way?
Thank you for your time and thank you for making theese videos.
popusimi 3 months ago
why epoxy and not interference fit?
trad444 3 months ago
John,
The B'port's head is out of tram.
nartfocker 3 months ago
Ahhhh sweet machining aluminium, no coolant required ;D
cruddiestcrudever 3 months ago
@cruddiestcrudever I am not sure if its even magnesium because I have never seen a spark from aluminium
Morkvonork 3 months ago
Great work, it has been brought up before but why not bore out the throttle body and "upgrade" so to speak. So new shafts, butterflies ect. Which would help with flow, thus a better running engine??
hamza3608 3 months ago
@hamza3608 - Finding oversize throttle plates with a 80 degree seat angle is pretty difficult, but this would definitely be a better solution for performance. I do this on Weber carbs all the time, but Weber T/plates are much easier to find.
fiatnutz 3 months ago
@fiatnutz
Cant you make some plates?
I feel a John 911 throttle body enlargement vid coming up! : D
MrGuvEuroman 3 months ago
great video!!
potsmoker5000 3 months ago
What kind of bonding glue did you use, I never seen that before. GREAT JOB!
pantherxx010 3 months ago
Happy Thanksgiving!
NlessBuzz 3 months ago
This may be a stupid question, but I"m learning....
Couldn't you sleeve this with brass? Would there be any advantages or disadvantages?
zaraak323i 3 months ago
@zaraak323i galvanic corrosion perhaps
brendanraymond 3 months ago
@brendanraymond~ yep. Id use SST throttle plates.
its0a0me 3 months ago
Great repair, yadayadayada, but how about showing how you find the center of the throttle bore and shaft hole? Milling the parts is the easy part. Showing the alignment procedure would really show what a magnificent machinist you are and would be great advertisement for your shop!
CoolasIce2 3 months ago
@CoolasIce2 - Hmm, show you how I do everything? Dude, that's how I make my money, I've shown you enough to get your creative juices flowing. If you want a personalized video made just for you, contact me.
fiatnutz 3 months ago 5
@fiatnutz
Oh cmon John to any machinist it is no secret. He uses a co-ax indicator. The repair machinists best friend. Takes about 30 seconds to find the center of almost any size hole between .125"-8.0+" Plenty of youtubes on using them. Also good for finding the distance between hole centers accurately and quickly. Cheap Chinese ones start at around $60 on eBay. Good ones are $300+ Love your videos, youve taught me a lot about automotive machining.
compucar03 3 months ago
Comment removed
CoolasIce2 3 months ago
@fiatnutz Creative juices they do, I have been watching for a long time, and am inspired to find a mill and a lathe and make all the parts I've dreamed about. Since I've found this place I have started looking into sand casting as well.I wished I lived nearby so I could have my VR6 Setup by you. After the extensive work I am putting into the rest of the car, custom built electronics, and VGT turbo it would be proper. My existing skill set combined with these skills would be amazing.Give classes?
g60scuzz 3 months ago
@g60scuzz - I have a year long course that covers everything that's in my book and a lot more. It's not cheep, but you get a lot of personalized training.
fiatnutz 3 months ago 2
@fiatnutz Do you have a link to were we can find your book?
potsmoker5000 3 months ago
@potsmoker5000 - Which one, I've written several?
fiatnutz 3 months ago
@fiatnutz All of them i would love to purchase them.
potsmoker5000 3 months ago
@fiatnutz Are they listed on your web site? i looked but i couldn't find anything.
potsmoker5000 3 months ago
@fiatnutz Never mind i think i just found them.
potsmoker5000 3 months ago
@potsmoker5000
I've been trying to find his books for months, last one i saw was going for $1200!! he needs to reprint more
: D
MrGuvEuroman 3 months ago
@MrGuvEuroman no kidding!
brendanraymond 3 months ago
Why don't you just machine them out and leave them that size?
More air is better isn't it?
MrGuvEuroman 3 months ago
@MrGuvEuroman mister what are you talking about? dont even post a coment if you have no idea how carburator works (venturi effect etc) and for that coment from ip161314, whats wrong with tight tolerancees and a glue that tube isnt going anywhere and isnt under any pressure, omg!!
great work mr. edwards, greetings
elvisTDI 3 months ago
@elvisTDI
Lol watch the video again, read the description then come back spot your error and delete your post.
John has already answered my/someone else's question above. ; )
MrGuvEuroman 3 months ago
@MrGuvEuroman whatever!
elvisTDI 3 months ago
@fiatnutz i wish i could take the course sucks that i live in norway
citydriver 3 months ago
@fiatnutz LOL That's good one John. I remember you told me that about the oven for engine block.
pantherxx010 3 months ago
@CoolasIce2 finding the centers or the bores is basic milling. there are several ways to do so. Subcribe to Mrpete222 he shows alot of basic machining practices.
zinc20L 3 months ago
@zinc20L OK Thanks. I'll do that.
CoolasIce2 3 months ago
John nice repair. But why not a freeze fit on the repair sleeve?
zinc20L 3 months ago
This is probably gonna seem like a stupid question but why couldn't it just be left borred out? What effect would the larger diameter have? Great work by the way!
FiatGuy23 3 months ago
@FiatGuy23 Throttle plate wouldn't fit the bigger hole.
CoolasIce2 3 months ago
fantastic work.
camochannel1 3 months ago
Awesome job. Love your videos.
hondannyboy 3 months ago
awesome!!!!!!! but glued? couldn´t be pressed in? i´m just curious, you are the master!!
ip161314 3 months ago 16
@ip161314 Glue makes perfect sense in place like this. And it makes good seal.
Kizmox 3 months ago
@Kizmox ok thats fine, i´m just asking.....
ip161314 2 months ago
@ip161314 I too would like to know.
brendanraymond 3 months ago
@ip161314 I can't answer for why he chose to glue it, but throttle bodies experience low temperatures and often bonding metals is stronger than even welding. Gluing is definitely the easier option and would work perfectly due to the low temperatures and large surface area. Many chassis are bonded, not welded or riveted. :)
jcadlols 2 months ago
Great video John...you did it again! I was wondering also, do you work alone?
DirTyOhGee 3 months ago
100 % awesomeness. John is a machinist GOD
backwoodsctryboy 3 months ago 15
Great job as always, John! :)
aryesegal1988 3 months ago