Show me your cradle |
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Show me your cradle |
cwpeden |
Jan 24 2016, 05:40 PM
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#1
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
In my vanilla 73 2.0 I'm at the top of the autocross field in my area, Porsche wise.
Now I need to beat the Miata's. I'm going to start with a EJ251 I just picked up. Asking everyone who has done or help with a conversion. What would you do differently with respect to supporting the engine and trans? Is a full cradle required or is supporting from the front and rear preferred? What wasn't strong enough? What has or hasn't failed? Too stiff? Too flexible? What was in the way? I'm going to use stock rear points what about the front? Thanks for any suggestions. |
r_towle |
Jan 24 2016, 05:48 PM
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#2
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
You cannot support it from the front, the engine mounts are in the middle of the engine.
Look for a few cradle designs, but basically it is two tubes running from the rear tranny mounts up to the engine cross bar. Off those two bars are short legs to motor mounts on the engine. Rich |
veekry9 |
Jan 24 2016, 05:56 PM
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#3
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OldMember Group: Retired Members Posts: 3,068 Joined: 17-June 13 From: TO Member No.: 16,025 Region Association: Canada |
Something wrong with your 914?
Miatas should be easy on the short track. The never ending search for more power,the chilled turbo beckons you,whispering 'power to weight and cruise economy'. (IMG:style_emoticons/default/drooley.gif) The front mount attaches are still the way to go,a beam is needed to pickup the soobee mounts and rubber bushes,a trapezoid set of tubes or fabbed I beams from plate. A few here have made the install without issue.On your back under the car looking up,tapemeasure the distances and draw it out to scale.I presume you have a welder at hand.I read somewhere there is a fellow selling kits,Renegade,I think. yeah,here it is http://www.renegadehybrids.com/ |
cwpeden |
Jan 24 2016, 06:17 PM
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#4
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
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cwpeden |
Jan 24 2016, 06:18 PM
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#5
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
Something wrong with your 914? Miatas should be easy on the short track. The never ending search for more power,the chilled turbo beckons you,whispering 'power to weight and cruise economy'. (IMG:style_emoticons/default/drooley.gif) The local Miata's are either turbo's or supercharged... (IMG:style_emoticons/default/confused24.gif) |
r_towle |
Jan 24 2016, 06:20 PM
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#6
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Custom Member Group: Members Posts: 24,574 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
The two side bars go to a cross member that uses the original 914 bar mounts....
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tazz9924 |
Jan 24 2016, 06:37 PM
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#7
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Senior Member Group: Members Posts: 703 Joined: 31-May 15 From: Mooresville NC Member No.: 18,779 Region Association: None |
You cannot support it from the front, the engine mounts are in the middle of the engine. Look for a few cradle designs, but basically it is two tubes running from the rear tranny mounts up to the engine cross bar. Off those two bars are short legs to motor mounts on the engine. Rich Yes u can small car makes mounts that allows you to mount it to the stock bar. |
effutuo101 |
Jan 24 2016, 06:52 PM
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#8
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Advanced Member Group: Members Posts: 2,734 Joined: 10-April 05 From: Lemon Grove Member No.: 3,914 Region Association: Southern California |
Not sure if Ian is make these any more. Also Renegade Hybrid has a great one.
Attached thumbnail(s) |
Mike Bellis |
Jan 24 2016, 07:51 PM
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#9
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
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DBCooper |
Jan 24 2016, 08:13 PM
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#10
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
This the Smallcar mount, to put a Subaru engine into a vanagon:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1453688001.1.jpg) It’s three piece and for a 914 you only use the two side pieces that bolt to either side of the engine. That front cross piece with the VW transmission cradle is discarded (or if you’re nice Smallcar will sell you just the side pieces) and that’s where it attaches to the stock 914 front engine cross bar. If you’re using the 901 transmission you can use the stock 914 transmission mounts, if you’re using a Subaru transmission then you’ll need to make your own. IMPORTANT: Stock Subaru turbo engines’ exhaust crosses from one side of the engine across the front to the other side, but this SmallCar mount is in the way. That means to use this mount with a turbo engine you’ll need to redesign the exhaust/turbo location and re-plumb everything. That's when a cradle makes a lot of sense. This is a typical cradle, home made: (IMG:http://www.914world.com/bbs2/uploads_offsite/i255.photobucket.com-2618-1269179839.15.jpg) The front mounts where the stock 914 engine bar mounts, the rear where the stock 914 transmission mounts. You can see the cross bar with the stock Subaru motor mounts in place. Pretty simple, it's really just a sub-frame, and it’s open, making it easy to plumb the exhaust, etc. |
mgp4591 |
Jan 24 2016, 08:17 PM
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#11
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914 Guru Group: Members Posts: 5,374 Joined: 1-August 12 From: Salt Lake City Ut Member No.: 14,748 Region Association: Intermountain Region |
Mike, I know your tube cradle is made from fairly lightweight stuff and is easily strong enough but do you have a total weight for that assembly?
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Mike Bellis |
Jan 24 2016, 08:21 PM
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#12
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
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veekry9 |
Jan 24 2016, 08:23 PM
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#13
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OldMember Group: Retired Members Posts: 3,068 Joined: 17-June 13 From: TO Member No.: 16,025 Region Association: Canada |
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Mike Bellis |
Jan 24 2016, 08:26 PM
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#14
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
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76-914 |
Jan 24 2016, 09:06 PM
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#15
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,502 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
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aircooledtechguy |
Jan 24 2016, 09:28 PM
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#16
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The Aircooledtech Guy Group: Members Posts: 1,966 Joined: 8-November 08 From: Anacortes, WA Member No.: 9,730 Region Association: Pacific Northwest |
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cwpeden |
Jan 25 2016, 02:41 PM
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#17
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
What is the prefered arrangment with regards to mounts.
Hard mount cradle to car and soft mount engine/trans or other way around? |
Mike Bellis |
Jan 25 2016, 10:34 PM
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#18
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
What is the prefered arrangment with regards to mounts. Hard mount cradle to car and soft mount engine/trans or other way around? That is a matter of choice. Hard mount will transfer engine noise. Soft mounts break (in my case). On my first V8 conversion, Ford 5.0 EFI, I had it idling and slowly let out the clutch. BAM! broke 2 new 911 transmission mounts. I switched to solid mounts. That was 24 years ago... |
DBCooper |
Jan 25 2016, 10:58 PM
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#19
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
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