 Holley EFI, Not just for American 4BBL carb replacements anymore... |
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| horizontally-opposed |
 Aug 2 2018, 11:33 AM
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Advanced Member  Group: Members Posts: 3,456 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None 
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So I am hearing this is a very attractive setup for 4+ cylinder engines, and can be made to work with ITB setups for a flat six, such as PMO's. The 4BBL pricing sure is right, and it's said to be "self tuning" and a dream to work with/on.
Anyone have any experience of this, or know of a Porsche engine running it? |
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| Mark Henry |
Aug 12 2018, 06:25 AM
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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 |
Big lift isn't a problem, large duration and overlap is the issue with any EFI system.
Do you remember what cam you're running? |
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| ottox914 |
Aug 12 2018, 09:35 PM
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest  |
QUOTE(Mark Henry @ Aug 12 2018, 07:25 AM)  Big lift isn't a problem, large duration and overlap is the issue with any EFI system. Do you remember what cam you're running? Intake: lift, .500, duration, 276, duration @ .050, 240. 110 lobe center Exhaust: lift, .500, duration, 284, duration @ .050, 249. 110 lobe center I don’t think the duration is that wild, but much more than stock. What say you, Mark? |
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| Mark Henry |
Aug 13 2018, 07:55 AM
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#4
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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(ottox914 @ Aug 12 2018, 11:35 PM) QUOTE(Mark Henry @ Aug 12 2018, 07:25 AM) Big lift isn't a problem, large duration and overlap is the issue with any EFI system. Do you remember what cam you're running? Intake: lift, .500, duration, 276, duration @ .050, 240. 110 lobe center Exhaust: lift, .500, duration, 284, duration @ .050, 249. 110 lobe center I don’t think the duration is that wild, but much more than stock. What say you, Mark? Yes that has less duration than my cam by about 20 degrees @ .050 That would improve your vacuum signal to the MPS. Is that a WEB 119? David could you please copy down all your values plus engine specs and send them to me? No rush, but I'd like to add them to my list. You should always have a copy for yourself as well. Just a FYI if you wanted you can get SDS to upgrade your system to EM-5 spec with full PC data logging for $590. You also would need the values copied down for this. This is the point I'm trying to get across, blaming a system for a build with incompatible components, in Rob's case likely a way too aggressive carb cam and his only single experience with SDS (or any other system), is in no way a fair unbiased comparison. Much akin to saying a 914 is underpowered terrible handling POS, when all you've ever driven was one poor condition rusted out 1.7 with a beat engine. |
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horizontally-opposed Holley EFI Aug 2 2018, 11:33 AM
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