 Car porn - and for my next trick...... |
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| Mikey914 |
 Nov 30 2023, 05:43 PM
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#1
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The rubber man  Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None 
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Been playing around with a new product line / lines. Not yet ready for the masses. Still have some decisions to make, but if this performs as we hope, it will be a lot of fun!!!
Attached thumbnail(s)  
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| Mikey914 |
Dec 1 2023, 12:49 AM
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#2
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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Game plan is to have one in a car to demonstrate for WCR.
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| majkos1 |
Dec 1 2023, 09:09 AM
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#3
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Member Group: Members Posts: 215 Joined: 11-August 17 From: Mile High 914 Member No.: 21,338 Region Association: Rocky Mountains |
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| MikeK |
Dec 1 2023, 09:19 AM
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#4
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Member Group: Members Posts: 108 Joined: 15-June 23 From: 80906 Member No.: 27,418 Region Association: Rocky Mountains |
What am I looking at? Long stroke crank with non-stroker pistons? Those are the biggest cylinder spacers I've ever seen. Is the tin going to fit?
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| Jack Standz |
Dec 1 2023, 09:20 AM
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#5
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Member Group: Members Posts: 278 Joined: 15-November 19 From: Happy Place (& surrounding area) Member No.: 23,644 Region Association: None |
OK, I'll take a guess.
It's a stroked 914 motor with a displacement of 2.4 to 2.5 liters. It has bigger through bolts, and a cast iron oil pump. Say 96mm bore and a stroke of 84 or 86mm. |
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| friethmiller |
Dec 1 2023, 10:07 AM
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#6
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Member Group: Members Posts: 486 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region
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QUOTE(Jack Standz @ Dec 1 2023, 09:20 AM)  OK, I'll take a guess. It's a stroked 914 motor with a displacement of 2.4 to 2.5 liters. It has bigger through bolts, and a cast iron oil pump. Say 96mm bore and a stroke of 84 or 86mm. Nice! My 2375 has a 82mm stroke on a 96mm bore and my cylinder spacers are tiny compared to that. Damn! (IMG:style_emoticons/default/blink.gif) |
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| Mikey914 |
Dec 1 2023, 11:39 AM
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#7
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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Won't go through all the specs right now, but will be assembling and posting all up once I'm done.
That, and I'm building 2 together as twins. |
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| Krieger |
Dec 2 2023, 12:20 AM
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#8
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Advanced Member Group: Members Posts: 4,721 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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The lower section of the spigots on your case look very thin.
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| Mikey914 |
Dec 2 2023, 11:22 AM
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#9
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The rubber man Group: Members Posts: 12,671 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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Yes and we have something special happening there too.
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| barefoot |
Dec 2 2023, 02:41 PM
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#10
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Senior Member Group: Members Posts: 1,276 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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Presume you're looking at bigger body case bolts.
The OEM bolts are designed for stretch to allow differential thermal expansion between cases and bolts. Thermal expansion coefficient for aluminum is 13.2 and 8.3 for steel. This is micro inches per inch per degree F. so the case will grow a lot more that the bolts when up to operating temperature. Not sure how close to yield strength the case bolts are when torqued, but the additional stretch from thermal expansion adds considerable force to those bolts. Note how big radii are incorporated into the enlarged ends. You need to watch the engineering as those big bolts will stretch less & force expansion loads into the root of these threads which are already a fatigue sensitive machine. |
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