2270 Build Thread |
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2270 Build Thread |
McMark |
Feb 4 2014, 12:00 PM
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#21
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I'm building this 2270 and I thought this would be a good one to document. I'm going to try and cover every little aspect of the build, although I'm not necessarily going to break down every process into a step by step.
I'm starting with a 1.7 'W' case. I did a quick line bore check and it's a nice STD case. But more on that later when I actually measure the line bore accurately. Case Preparation - In this section I'm covering all the modifications and inspections to be done on the bare case. Threaded Gallery Plugs, Resurface Oil Filter Mount I used my slide hammer setup to pull the original gallery plugs. I'm just doing the 'normal five'. In this picture also shows the oil filter mount face - I pull the studs and true the surface up to ensure a good, leak-free seal. HV Oil Pump I have a Schadek oil pump that I've cut in half to mark the case for 'port matching' the oil pump. The ports on the case are smaller than the oil pump, so this simply eases the transition. I use a carbide cutter for aluminum in a pneumatic die grinder to carefully open up the holes. Cleaning Stud Threads I chased all the M8x1.25 studs on the case. This eases installation, but also ensures more accurate torque. Any fastener that has a specific torque value should have clean threads. The rust/dirt/sealant/etc on the surface will make the fastener harder to turn, which means you're getting a slightly false torque reading. You'll see the head studs have all been removed. I don't use a tap or die to clean the head stud or the case threads because I've seen this result in loose head studs. I don't touch this parts of the case, and I use a wire wheel on the bench top grinder to clean the threads without risk of removing material. |
McMark |
Feb 5 2014, 03:35 PM
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#22
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
They absolutely have blown on people. You see a thread pop up about it every 6 months or so. But only those five because the rest are smaller. The oiling system all sees the same psi, but if you actually do the math on psi as pounds per square inch it's lower force. This is an incorrect, oversimplification, but essentially a 1" plug at 50 psi, sees 50 pounds of force where a 1/2" plug at 50 psi would see 25 pounds of force. Right idea there, just bad math (the are area of a 1/2" plug isn't half of a 1" plug).
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Dave_Darling |
Feb 5 2014, 05:16 PM
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#23
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914 Idiot Group: Members Posts: 15,048 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
They absolutely have blown on people. (IMG:style_emoticons/default/bye1.gif) My old 1.8 did. I started the car, the oil light came back on again, I reved it a little, the light went out and came on again. I shut it off right there, and got out to look. I saw the plug and the nice puddle of oil--it was quite sizeable! My mechanic replaced the plug (I think with another expansion plug, but I'm not sure) and re-filled the oil and I was good to go. --DD |
rwilner |
Feb 6 2014, 07:15 PM
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#24
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
Hey Mark, what's the plan for induction? (Sorry if you mentioned it and I missed it)
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McMark |
Feb 6 2014, 08:22 PM
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#25
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Hey Mark, what's the plan for induction? (Sorry if you mentioned it and I missed it) MicroSquirt of course. (IMG:style_emoticons/default/beerchug.gif) Might build a custom set of stock style intake runners and plenum, but sized larger. Can't fantasize about that too much just yet. There's still a lot of work to do on the motor. |
JamesM |
Feb 6 2014, 10:33 PM
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#26
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Senior Member Group: Members Posts: 1,958 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Hey Mark, what's the plan for induction? (Sorry if you mentioned it and I missed it) MicroSquirt of course. (IMG:style_emoticons/default/beerchug.gif) Might build a custom set of stock style intake runners and plenum, but sized larger. Can't fantasize about that too much just yet. There's still a lot of work to do on the motor. Think I have said this a few times now, but check out the later 2.1 Vanagon throttle body. 50mm, bolts to the 1.8 plenum, and has a few other neat things about it. You just want to massage out the opening on the plenum a bit to match the larger size. Intake runners on the 1.8 are the largest stock diameter you can get (same as the 2.0 914 setup) |
cgnj |
Mar 27 2016, 08:57 PM
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#27
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Senior Member Group: Members Posts: 634 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
Think I have said this a few times now, but check out the later 2.1 Vanagon throttle body. 50mm, bolts to the 1.8 plenum, and has a few other neat things about it. You just want to massage out the opening on the plenum a bit to match the larger size. Intake runners on the 1.8 are the largest stock diameter you can get (same as the 2.0 914 setup) Hi, You need to explain this to me. I just measured the volume of a 2.1 liter vanadon plenum and a 2.0 porsche plenum. Volumes are not even close. Additionally, for a 2270 the minimum throttle body size is 58 MM. Not going to fit on a vanagon tb. I just measured and mocked this up this afternoon. Tell me why your experience is different than mine. Carlos |
JamesM |
Mar 28 2016, 02:09 AM
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#28
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Senior Member Group: Members Posts: 1,958 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Think I have said this a few times now, but check out the later 2.1 Vanagon throttle body. 50mm, bolts to the 1.8 plenum, and has a few other neat things about it. You just want to massage out the opening on the plenum a bit to match the larger size. Intake runners on the 1.8 are the largest stock diameter you can get (same as the 2.0 914 setup) Hi, You need to explain this to me. I just measured the volume of a 2.1 liter vanadon plenum and a 2.0 porsche plenum. Volumes are not even close. Additionally, for a 2270 the minimum throttle body size is 58 MM. Not going to fit on a vanagon tb. I just measured and mocked this up this afternoon. Tell me why your experience is different than mine. Carlos What do i need to explain here? My experience is different than yours in that i have experience. This is the setup I have been running on my autox car for the last 3 years, it works great, To be clear though I never said anything about a Vanagon plenum, I am using the 1.8 plenum which is actually even smaller. Also to be clear I am running this on 2056, but its a 2056 that spends a good deal of of time above 6k RPM. Is it theoretically perfect, no, but no off the shelf parts are going to be. In fact even going fully custom you might have a hard time getting to theoretically perfect just due to the engine layout. It does work extremely well though and is simple to put together. I am curious as to how you came to the conclusion that a 58mm throttle body is the MINIMUM for a 2270. Theoretical calculations as well as real world experience tells me this is on the upper side of where you would want to be unless your looking to build a max power high revving 2270, in which case you might as well be running ITBs anyways as the throttle body is not going to be your limiting factor. Depending on what sort of motor you are building, best throttle control for a 2270 is most likely going to be somewhere between a 47-52mm throttle body. |
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