 x-faktory T4, 1911 T4 with EFI/ITBs |
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| x-faktory |
 Jan 26 2021, 02:19 PM
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#1
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Newbie  Group: Members Posts: 21 Joined: 16-August 13 From: PNW Member No.: 16,261 Region Association: Pacific Northwest  |
Some of you may be aware of my 911 engine builds, but...I've decided on building a T4-1911.....I was quickly going down the rabbit hole with bigger/better, but then reminded myself of one of the primary goals......and that is to help configure the RHD T'body design that I am using on the 911 builds... to be used for the 4 cylinder engines...starting with the Type 4. Parts are arriving and here is a sneak peek at the 1st units, mounted to manifolds.......
 Stay tuned as parts for the build are arriving daily regards, al |
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| Shivers |
Jan 27 2021, 09:05 PM
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#2
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Senior Member Group: Members Posts: 2,410 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
42mm, big for a 1911, really curious to see how it will run when it's done.
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| barefoot |
Jan 28 2021, 08:00 AM
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#3
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Senior Member Group: Members Posts: 1,279 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States 
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QUOTE(Shivers @ Jan 27 2021, 10:05 PM)  42mm, big for a 1911, really curious to see how it will run when it's done. For carb's yes, for FI should not matter at all as fuel delivery is independent of throat size. |
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| Mark Henry |
Jan 28 2021, 10:26 AM
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#4
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(barefoot @ Jan 28 2021, 09:00 AM) QUOTE(Shivers @ Jan 27 2021, 10:05 PM) 42mm, big for a 1911, really curious to see how it will run when it's done. For carb's yes, for FI should not matter at all as fuel delivery is independent of throat size. Yes...but...too big and you make vacuum issues worse, add a big duration cam and you're running in alphaN/TPS only. |
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| JamesM |
Jan 28 2021, 10:48 AM
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#5
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Senior Member Group: Members Posts: 1,915 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(Mark Henry @ Jan 28 2021, 09:26 AM) QUOTE(barefoot @ Jan 28 2021, 09:00 AM) QUOTE(Shivers @ Jan 27 2021, 10:05 PM) 42mm, big for a 1911, really curious to see how it will run when it's done. For carb's yes, for FI should not matter at all as fuel delivery is independent of throat size. Yes...but...too big and you make vacuum issues worse, add a big duration cam and you're running in alphaN/TPS only. (IMG:style_emoticons/default/agree.gif) Might as well cam the hell out of it as you are most likely going to have very little resolution with the vacuum signal and have to run alphaN anyways Ran 42mm Jenveys on a 2270 with a cam optimized for lower RPM/very good vacuum and was still seeing 0 vacuum at roughly 30% throttle off idle . They were a pretty good match for that motor, running in MS hybrid mode split the map almost 50/50. Running on a 1911 I wouldn't be surprised if you wind up seeing no vacuum across 70%+ of operating conditions. |
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Posts in this topic
x-faktory x-faktory T4 Jan 26 2021, 02:19 PM
Aerostatwv Watching. Thanks! Jan 26 2021, 02:24 PM AfricanHijinx those look great Jan 26 2021, 02:26 PM x-faktory These should work great too....i've been using... Jan 26 2021, 02:30 PM JamesM :popcorn: :popcorn: :popcorn:
Curious to hear ... Jan 26 2021, 02:34 PM jd74914 :agree:
Looking forward to seeing details too... Jan 26 2021, 02:57 PM rhodyguy Bodies and tall Vstacks look very similar to the B... Jan 26 2021, 03:40 PM x-faktory Yes, as stated in the initial post, these are made... Jan 26 2021, 04:22 PM JmuRiz Very cool, do you already have the parts or can yo... Jan 27 2021, 12:17 PM Mark Henry Looks a lot like the motorcycle TB's I made.
h... Jan 27 2021, 12:22 PM pete000 Always wanted to go this route on my 914-4... Jan 27 2021, 06:32 PM racerbvd :beer2: :beer2: Jan 27 2021, 06:38 PM rktmn247 Welcome X-factory! Glad to see you posting he... Jan 27 2021, 08:39 PM
TRS63 That is really interesting, as this is exactly the... Jan 28 2021, 02:51 AM
Mark Henry
Stay tuned as parts for the build are arrivi... Jan 28 2021, 07:21 AM |
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