 Type 4 Target Compression, Rebuild, what's everyone shooting for |
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| 0396 |
 Oct 18 2013, 06:54 PM
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#1
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Advanced Member  Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California  |
Question for the Tech Trust.
What's the compression ratio that everyone targets on a type 4 2.0 rebuild? Stock compression approx 8.0 + or shoot for 9.0+ These decisions are based on a daily driver / stock / pump gas/ higher than normal cam. Thanks in advance for your comments / suggestions. I'm ready (IMG:style_emoticons/default/piratenanner.gif) |
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| Cap'n Krusty |
Oct 18 2013, 07:01 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Carbs? FI? Whatever, under 8:1. My VERY knowledgeable engine guys say 7.5 on today's fuel here in CA.
The Cap'n |
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| 0396 |
Oct 18 2013, 07:04 PM
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#3
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Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
QUOTE(Cap'n Krusty @ Oct 18 2013, 06:01 PM)  Carbs? FI? Whatever, under 8:1. My VERY knowledgeable engine guys say 7.5 on today's fuel here in CA. The Cap'n Cap'n I'm happy you chim in. I'm going to use FI. |
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| yeahmag |
Oct 18 2013, 09:09 PM
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#4
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California 
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Stock or atermarket cam?
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| Cap'n Krusty |
Oct 18 2013, 09:35 PM
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#5
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
You'll be VERY sorry you used a " higher than normal cam" if you use stock FI. BTDT. There are fans of Jake's EFI cam, but I have no experience with it and cannot comment on it. I believe he's done his homework, however, and his claims have facts to support them. DO NOT believe the claims made by the sales department of WebCam!
The Cap'n |
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| Dave_Darling |
Oct 18 2013, 09:45 PM
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#6
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The European-spec 2.0 914 engine ran 8:1 compression and was spec'ed for mid-grade gasoline.
...Another data point for you... --DD |
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| 0396 |
Oct 18 2013, 10:25 PM
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#7
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Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
QUOTE(yeahmag @ Oct 18 2013, 08:09 PM) Stock or atermarket cam? After market -DC. Highest lift while still utilizing FI. After buying your deck height tool two years ago. I'm finally going to use it -(IMG:style_emoticons/default/smile.gif) |
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| yeahmag |
Oct 19 2013, 11:28 AM
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#8
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California
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Typically the cam will mention a target CR. Who did you buy it from?
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| Cap'n Krusty |
Oct 19 2013, 11:36 AM
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#9
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(Dave_Darling @ Oct 18 2013, 08:45 PM) The European-spec 2.0 914 engine ran 8:1 compression and was spec'ed for mid-grade gasoline. ...Another data point for you... --DD Mid-grade early 1970s European gasoline, not US formulation for the time, and NOT what we have today. |
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