 Engine build question, 1.3 to 1 ratio rocker arms. |
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| Matty900 |
 Jul 25 2017, 07:48 PM
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#1
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Senior Member  Group: Members Posts: 1,269 Joined: 21-February 15 From: Oregon Member No.: 18,454 Region Association: Pacific Northwest  |
I just got a call from a engine builder talking about rocker arms. I may have misunderstood him but I think he said that the guy that did the cam for him suggested that if we could get a 1.3 to 1 ratio rocker arms we could get more out of the cam. I know enough to know what I don't know any of advicece would be appreciated.
1.7 being built to 1911 with dellorto 45 carbs |
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| Mark Henry |
Jul 25 2017, 09:39 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
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| Matty900 |
Jul 26 2017, 12:07 AM
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#3
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Senior Member Group: Members Posts: 1,269 Joined: 21-February 15 From: Oregon Member No.: 18,454 Region Association: Pacific Northwest |
QUOTE(Mark Henry @ Jul 25 2017, 08:39 PM)  I'm getting nervous about this guy. |
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| Tbrown4x4 |
Jul 26 2017, 02:40 AM
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#4
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Senior Member Group: Members Posts: 703 Joined: 13-May 14 From: Port Orchard, WA Member No.: 17,338 Region Association: None 
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Thanks! I have been trying to decide on a cam, and 1.3:1 was mentioned. I didn't have a chance to post the question yet. (IMG:style_emoticons/default/smile.gif)
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| Mark Henry |
Jul 26 2017, 06:06 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Matty900 @ Jul 26 2017, 02:07 AM) QUOTE(Mark Henry @ Jul 25 2017, 08:39 PM) I'm getting nervous about this guy. The cam grinder should know that the stock ratio is 1.3:1, in my book so should the builder. I'm not perfect, I make knowledge mistakes all the time about other aspects of 914, but I specialize in engines, so that I know. If you builder does lots of type 1 engines he should be OK on a T4 stock build, but this is not a good first timer engine unless you are very careful and take the time to learn. |
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| McMark |
Jul 26 2017, 10:09 AM
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#6
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
QUOTE(Matty900 @ Jul 26 2017, 02:07 AM) QUOTE(Mark Henry @ Jul 25 2017, 08:39 PM) I'm getting nervous about this guy. Yes, that's a huge red flag, IMHO. |
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| porschetub |
Jul 26 2017, 05:36 PM
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#7
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Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(McMark @ Jul 27 2017, 04:09 AM) QUOTE(Matty900 @ Jul 26 2017, 02:07 AM) QUOTE(Mark Henry @ Jul 25 2017, 08:39 PM) I'm getting nervous about this guy. Yes, that's a huge red flag, IMHO. (IMG:style_emoticons/default/agree.gif) same as fitting 45mm carbs on a 1.7 (IMG:style_emoticons/default/WTF.gif) . |
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