Race motor for 914 yah or nah? |
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Race motor for 914 yah or nah? |
Willisbegood |
Dec 3 2019, 03:12 PM
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#1
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Newbie Group: Members Posts: 26 Joined: 25-September 19 From: San Antonio Texas Member No.: 23,495 Region Association: South East States |
I recently posted a thread about lost compression on my 72 1.7 liter 914. I am currently seeking to drop the motor and replace the head gasket where I believe the leak is at however I came across this motor and wanted to know what your guys and (gals) thoughts are. Here is the 914 I have and this is the race motor I’m thinking about putting into it. (If I can get it for the right price). All comments are appreciated these are the motor specs..92x74 Race Engine. I have the build sheet. It's never been ran. It has 12.5: 1 Compression and FK-8 Engle Cam. Big Valve 42x37.5 heads with Dual 48 Dellortos.
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bdstone914 |
Dec 3 2019, 03:58 PM
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#2
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bdstone914 Group: Members Posts: 4,673 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
@Willisbegood
0 compression on one cyl? What are the numbers on all four? Might be time for a rebuild. These motors do not use head gaskets. They were used at the factory but discontinued use. Before you drop the engine check the valve train for problems that could cause the compression loss. Forget the race motor. It is a type I and does not fit a 914. And t b.f at is not a good street motor. |
porschetub |
Dec 3 2019, 08:34 PM
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#3
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Advanced Member Group: Members Posts: 4,725 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
@Willisbegood 0 compression on one cyl? What are the numbers on all four? Might be time for a rebuild. These motors do not use head gaskets. They were used at the factory but discontinued use. Before you drop the engine check the valve train for problems that could cause the compression loss. Forget the race motor. It is a type I and does not fit a 914. And t b.f at is not a good street motor. Seem to remember the head gaskets were deleted as per service letter around 1990,my point was that there will be people that fitted them because they are in the gasket sets and not all know they are not suitable. |
ClayPerrine |
Dec 4 2019, 08:02 AM
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#4
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Life's been good to me so far..... Group: Admin Posts: 15,820 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
@Willisbegood 0 compression on one cyl? What are the numbers on all four? Might be time for a rebuild. These motors do not use head gaskets. They were used at the factory but discontinued use. Before you drop the engine check the valve train for problems that could cause the compression loss. Forget the race motor. It is a type I and does not fit a 914. And t b.f at is not a good street motor. Seem to remember the head gaskets were deleted as per service letter around 1990,my point was that there will be people that fitted them because they are in the gasket sets and not all know they are not suitable. The service bulletin you refer to was for the VW bus, it has nothing to do with any 914. It does not even mention the 914 in the bulletin. Most of us do not have the skills needed to properly setup a Type IV without the head gaskets. To do so requires lapping the cylinders into the head, and making sure the deck height is exactly the same on both cylinders so they seal correctly. Using the head gaskets insures a good seal between the head and the cylinders when the deck height is not perfect between the two cylinders. I know someone is going to say Jake Raby doesn't use them. But Jake has a huge machine shop, all the correct tools, and is very, very picky when doing the machine work. Do you have the same facilities, tools, and skills as Jake? I know I don't. I use the head gaskets, and I have for all 410K miles in Betty's car. |
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