 1.7 Engine Build Questions, Need advice on what I should know |
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| Matty900 |
 Dec 5 2016, 01:29 AM
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Senior Member  Group: Members Posts: 1,269 Joined: 21-February 15 From: Oregon Member No.: 18,454 Region Association: Pacific Northwest  |
My 72 barn find ( http://www.914world.com/bbs2/index.php?sho...=275587&hl= ) is now starting to get a lot of work done so I can hopefully make it to lots of rallies next year. The car Has 50K original miles on a 1.7 that had some work on it previously making it a 1911 with Dlortos on it.
The engine is now torn down for rebuild with a little more power. I would like it to look as stock as possible but would like it to be a sleeper. I am considering 2.0 LTR FI and having everything else built. I am looking for suggestions on what you would do to the engine and why. Thanks for the help Attached thumbnail(s)   Attached image(s) 
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| McMark |
Dec 5 2016, 08:23 PM
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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 |
71mm stroke is stock 2.0.
71mm x 94mm is 1971, which is the stock 2.0 size. 71mm x 96mm is 2056. Stock 71mm crank and rods are fine for most builds, no need for fancy upgraded components. If I were you, I'd look at a 1911, with a focus on lightening. Order of 'upgrades' by cost/benefit (in my opinion) Core 1911 (what you've got now, your starting point) Lightened flywheel. New 96mm pistons and cylinders. 2.0 heads. Valves/springs/retainers/pushrods for high RPM (lighter/stiffer). Lightened connecting rods. Lightened pistons. |
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| Matty900 |
Dec 6 2016, 02:00 PM
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#3
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Senior Member Group: Members Posts: 1,269 Joined: 21-February 15 From: Oregon Member No.: 18,454 Region Association: Pacific Northwest |
QUOTE(McMark @ Dec 5 2016, 06:23 PM)  71mm stroke is stock 2.0. 71mm x 94mm is 1971, which is the stock 2.0 size. 71mm x 96mm is 2056. Stock 71mm crank and rods are fine for most builds, no need for fancy upgraded components. If I were you, I'd look at a 1911, with a focus on lightening. Order of 'upgrades' by cost/benefit (in my opinion) Core 1911 (what you've got now, your starting point) Lightened flywheel. New 96mm pistons and cylinders. 2.0 heads. Valves/springs/retainers/pushrods for high RPM (lighter/stiffer). Lightened connecting rods. Lightened pistons. What about the cam? I know the PO had already done some work on it. What do I want it to be? |
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Posts in this topic
Matty900 1.7 Engine Build Questions Dec 5 2016, 01:29 AM
McMark The standard upgrades are:
1.7/1.8 starting point... Dec 5 2016, 08:19 AM
Matty900
The standard upgrades are:
1.7/1.8 starting poin... Dec 5 2016, 10:25 AM Optimusglen I guess I maybe don't know the full meaning of... Dec 5 2016, 10:34 AM Matty900
I guess I maybe don't know the full meaning o... Dec 5 2016, 05:55 PM Dave_Darling Your 1911cc with Dells should be about as good as ... Dec 5 2016, 02:45 PM Matty900
Your 1911cc with Dells should be about as good as... Dec 5 2016, 06:20 PM Optimusglen I believe I've read a post on here by Jake Rab... Dec 6 2016, 07:47 AM McMark Glen, you're right about the velocity increase... Dec 6 2016, 08:00 AM McMark Depends on how far down that list you're going... Dec 6 2016, 02:49 PM Jake Raby I prefer most things about the 1.7 engine as a fou... Dec 17 2016, 02:31 PM |
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