A 72 1.7 "turbo" story |
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A 72 1.7 "turbo" story |
GaroldShaffer |
Jun 13 2021, 02:59 PM
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#1
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You bought another 914? Group: Benefactors Posts: 7,624 Joined: 27-June 03 From: Portage, IN Member No.: 865 Region Association: None |
18yrs ago a local contacted me looking for parts for his 72 that he has owned since 74. He was "restoring" it and said it had a turbo.
8 years ago he contacts me out of the blue still needing parts for his restoration. He comes over and ends up buying a 75 parts car I had to use for some sheet metal he needs. Fast forward 3 weeks ago. Contacts me again saying he has sold his house and needs to get rid of his 914 and parts. After talking for a while he tells me his wife passed from covid while he was battling cancer himself. He is now cancer free, but at 68yrs old he has a new priority in life and it is time to get on living. He has since purchased a small airplane and is taking flying lessons, bought a Ferrari and a new place in FL. All the things he and his wife talked about doing. So now I have this 72 with a 1.7 built out to a 1.9 and yes it has a turbo. The 72 has been in this state of projectness for over 37 years. We ran the engine at his place before loading it and the 914 up. So now I get to learn about turbos. Attached thumbnail(s) |
Mike Bellis |
Jun 13 2021, 03:55 PM
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#2
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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 |
That looks like a pile of parts that should stay a pile of parts. Or ship it to the UK, they would love to put that puzzle back together.
It would take a lot of effort to get it running again... (IMG:style_emoticons/default/confused24.gif) |
Maltese Falcon |
Jun 13 2021, 04:09 PM
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#3
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Advanced Member Group: Members Posts: 4,694 Joined: 14-September 04 From: Mulholland SoCal Member No.: 2,755 Region Association: None |
Crown was a decent, simple blow through, non Intercooled turbo kit. They featured a 300 series B-25 flow Rajay turbo (small a/R) for quick spool, boost controlled by an upstream blow off valve. The wastegate (seen in pic) more than likely a later-on mod. Crude efi enrichment was a hobbs-switch set at 5psi, and actuates the (cold-start inj.) via the cyl-head temp sensor. Crown kit also (reason ?) eliminated the HB's for a pair of short exhaust manifolds that placed the turbo just under the rear trunk; turning the trunk into a hibachi bbq.
Crown Co. were the folks that also had kits to stuff a SBC 327 into your Corvair ! Fun stuff. |
MM1 |
Jun 13 2021, 04:53 PM
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#4
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914 obsession continues Group: Members Posts: 608 Joined: 9-May 18 From: Thousand Oaks, CA Member No.: 22,105 Region Association: Southern California |
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JeffBowlsby |
Jun 13 2021, 05:30 PM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
I’d love a copy of those Crown install instructions if you are willing to scan and email them to me Garold.
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GaroldShaffer |
Jun 13 2021, 05:57 PM
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#6
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You bought another 914? Group: Benefactors Posts: 7,624 Joined: 27-June 03 From: Portage, IN Member No.: 865 Region Association: None |
That looks like a pile of parts that should stay a pile of parts. Or ship it to the UK, they would love to put that puzzle back together. It would take a lot of effort to get it running again... (IMG:style_emoticons/default/confused24.gif) Yep, that shell is junk. Lots of bad repairs, but perfect dash, leather wrapped steering wheel, lots of powdered coated suspension bits..... |
GaroldShaffer |
Jun 13 2021, 05:58 PM
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#7
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You bought another 914? Group: Benefactors Posts: 7,624 Joined: 27-June 03 From: Portage, IN Member No.: 865 Region Association: None |
I’d love a copy of those Crown install instructions if you are willing to scan and email them to me Garold. Of course Jeff. I actually think there are two sets of manuals. I will go through the stacks of paper that came with the car and get back to you in a few days. |
Chris H. |
Jun 13 2021, 06:25 PM
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#8
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Senior Member Group: Members Posts: 4,032 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
Seems like you should slap that on your daily driver 914 Garold!
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ClayPerrine |
Jun 13 2021, 07:13 PM
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#9
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Life's been good to me so far..... Group: Admin Posts: 15,514 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
@scottthephotog has a Crown turbo kit that has never been installed.
He already has a PDF of the instructions. Scott... you want to chime in here? Clay |
KevinW |
Jun 13 2021, 07:20 PM
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#10
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Newbie Group: Members Posts: 42 Joined: 25-May 15 From: Winona, Minnesota Member No.: 18,761 Region Association: Upper MidWest |
I have a Crown kit on my car. I also have a PDF of the instructions.
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914rrr |
Jun 14 2021, 05:48 PM
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#11
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Senior Member Group: Members Posts: 1,835 Joined: 1-July 03 From: Knoxville, TN Member No.: 874 Region Association: South East States |
Hi Garold, I'm not sure if you remember, but I bought Ed Atkinson's Crown Turbo'd 914 2.0 many years ago.
Ed had already passed away, so I ended up doing countless weeks/months of research on it and enlisted help from just about everybody here that knows something/anything about them (many thanks again Marty!). I even had a chance to speak with Hot Rod Legend Ak Miller about his blow off valve that was on that 914. If you REALLY want to turbo a 914, don't use the Crown kit especially with stock FI. PM me and we can chat at length as to why and what may be a better path forward. If it still has the Rayjay turbo, they are highly sought after by the Corvair Turbo guys and experimental aircraft guys. $$$$$$ The Rayjays are also very hard to find parts for. I eventually gave up getting it to run without detonating and switched it back to stock NA FI'd and sold it. I was a blast on boost before it started heating up and detonating tho'... |
get off my lawn |
Jun 15 2021, 12:35 AM
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#12
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Member Group: Members Posts: 168 Joined: 18-August 11 From: west coast Member No.: 13,462 Region Association: None |
Caint turbo a 914. Just sayin ;-)
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wonkipop |
Jun 15 2021, 02:48 AM
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#13
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Advanced Member Group: Members Posts: 4,402 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
Caint turbo a 914. Just sayin ;-) yeah - but you got to admire the lunacy of those years when they thought they could turbo anything - including tiny little pushrod world war 2 mechanical minds. in the same era, bmw were sending blokes out to piss on junkyard engine blocks to fortify them for F1 turbo. i guess it was science? |
ClayPerrine |
Jun 15 2021, 05:47 AM
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#14
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Life's been good to me so far..... Group: Admin Posts: 15,514 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Caint turbo a 914. Just sayin ;-) yeah - but you got to admire the lunacy of those years when they thought they could turbo anything - including tiny little pushrod world war 2 mechanical minds. in the same era, bmw were sending blokes out to piss on junkyard engine blocks to fortify them for F1 turbo. i guess it was science? Wonk, You missed the running joke on 914World. There was a person who's name is lost on this forum somwhere who said is is impossible to turbocharge a 914. A few of our members proved him wrong. So if someone starts a thread about turbocharging a 914, someone else has to say "You can't turbo a 914". I am surprised it took this long for someone to actually say it. Clay |
914rrr |
Jun 15 2021, 07:19 PM
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#15
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Senior Member Group: Members Posts: 1,835 Joined: 1-July 03 From: Knoxville, TN Member No.: 874 Region Association: South East States |
Hi Garold, PM sent.
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wonkipop |
Jun 16 2021, 05:23 AM
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#16
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Advanced Member Group: Members Posts: 4,402 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille |
Caint turbo a 914. Just sayin ;-) yeah - but you got to admire the lunacy of those years when they thought they could turbo anything - including tiny little pushrod world war 2 mechanical minds. in the same era, bmw were sending blokes out to piss on junkyard engine blocks to fortify them for F1 turbo. i guess it was science? Wonk, You missed the running joke on 914World. There was a person who's name is lost on this forum somwhere who said is is impossible to turbocharge a 914. A few of our members proved him wrong. So if someone starts a thread about turbocharging a 914, someone else has to say "You can't turbo a 914". I am surprised it took this long for someone to actually say it. Clay (IMG:style_emoticons/default/smile.gif) i'm a thousand miles away. or is it that 10,000. (IMG:style_emoticons/default/smile.gif) americans can prove anyone wrong. russians, chinese. dumb arse aussies (IMG:style_emoticons/default/smile.gif) been away from america too long. need to go to marfa. locked down and ,,,,,,,,,,, |
scottthephotog |
Jun 16 2021, 10:40 AM
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#17
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Member Group: Members Posts: 187 Joined: 20-November 18 From: Euless, TX Member No.: 22,667 Region Association: Southwest Region |
@scottthephotog has a Crown turbo kit that has never been installed. He already has a PDF of the instructions. Scott... you want to chime in here? Clay Jumping in about the turbo kit. It's great to see one of these actually installed on an engine. Mine has been sitting on a shelf in my garage for the past 2 years. I don't recall there being any fuel enrichment under boost. It's a very primitive setup. As mentioned, there is no intercooler or wastegate on the original kit. Boost is controlled by an IMPCO TC2. Here is a picture of the TC2 as well as a diagram of how it works: I sent a pdf of the 914 turbo instructions to Larry who posted it on the 914 manuals website. The instructions can be downloaded here: http://p914-6info.net/Manuals.htm I haven't installed the turbo yet for 2 main reasons. 1. Living in TX, heat is a problem. Yes, I could add an intercooler and an additional oil cooler to the kit to reduce heat. 2. I love the way the car drives right now. The throttle is very responsive, and I'm not sure I want to add turbo lag to that. Maybe at some point down the road, I'll mess with the turbo, but for now, I've got another 914 I need to get on the road first. Maybe once the second 914 is done, I'll return to the first one and potentially add the turbo. |
KevinW |
Jun 17 2021, 05:38 AM
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#18
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Newbie Group: Members Posts: 42 Joined: 25-May 15 From: Winona, Minnesota Member No.: 18,761 Region Association: Upper MidWest |
@scottthephotog has a Crown turbo kit that has never been installed. He already has a PDF of the instructions. Scott... you want to chime in here? Clay Jumping in about the turbo kit. It's great to see one of these actually installed on an engine. Mine has been sitting on a shelf in my garage for the past 2 years. I don't recall there being any fuel enrichment under boost. It's a very primitive setup. As mentioned, there is no intercooler or wastegate on the original kit. Boost is controlled by an IMPCO TC2. Here is a picture of the TC2 as well as a diagram of how it works: I sent a pdf of the 914 turbo instructions to Larry who posted it on the 914 manuals website. The instructions can be downloaded here: http://p914-6info.net/Manuals.htm I haven't installed the turbo yet for 2 main reasons. 1. Living in TX, heat is a problem. Yes, I could add an intercooler and an additional oil cooler to the kit to reduce heat. 2. I love the way the car drives right now. The throttle is very responsive, and I'm not sure I want to add turbo lag to that. Maybe at some point down the road, I'll mess with the turbo, but for now, I've got another 914 I need to get on the road first. Maybe once the second 914 is done, I'll return to the first one and potentially add the turbo. @scottthephotog My kit came with a vacuum operated fuel pressure regulator. I won’t be using it as I switched to dual 40 Weber’s. I found a different fuel regulator that works with carbs. Attached image(s) |
JeffBowlsby |
Jun 17 2021, 08:53 AM
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#19
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Scott and Kevin were gracious enough to send me their copies of the installation instructions. They are different.
The May 1974 instructions were for the 1.7 and 1.8L only. The Aug 1974 are edited to include the 2.0L, and spcifically include a variable fuel pressure regulator. Attached File(s) 914_Crown_Turbo_Kit_Install_Instructions_May1974_ScottThePhotog.pdf ( 1.83mb ) Number of downloads: 27 |
JeffBowlsby |
Jun 17 2021, 08:54 AM
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#20
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914 Wiring Harnesses Group: Members Posts: 8,533 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Here are the August 1974 instructions:
Attached File(s) 914_Crown_Turbo_Kit_Install_Instructions_Aug1974_KevinWohlert.pdf ( 3.59mb ) Number of downloads: 30 |
Lo-Fi Version | Time is now: 7th June 2024 - 10:52 PM |
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