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Old 08-31-2017, 09:17 AM   #151
a468bu
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Default Re: Has anyone here successfully tuned EFI Stack Injection?

Brand new manifold, it does have a manifold under the intake tapped to each runner for the map signal
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Old 08-31-2017, 01:16 PM   #152
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Default Re: Has anyone here successfully tuned EFI Stack Injection?

Ok so you do have a plenum under the intake. No iac...hmmmm. Seems pretty important to me being that the ecm is going to constantly making adjustments. How about an air temp sensor and coolant sensor? Also who did the conversion? I'm plumbed out of the plenum for the map AND the iac. I'm not sure how mixing a mechanical feature in with the ecm would work. Even setting the blades correctly the ecm is going to manage a/f at idle. Once again I'm not familiar with holleys program. How does the ecm control idle air? The standard 2 thou on the blades may need to be changed with holleys program, idk.
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Old 09-01-2017, 07:52 AM   #153
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Default Re: Has anyone here successfully tuned EFI Stack Injection?

I believe I have figured it out. It all was all throttle plate adjustment. They need to be closed. They need to be adjusted when the car is Hot. But right now as the car cools down they stick in the bores. So they car will have to warm up until your able to drive it. I have no done a cold start yet with them adjusted this way, so we will find that out today. I am also probably going to cut the shafts in half and get the adjusters Hilborn has on their setup. I was told .002 clearance but that's for mechanical injection not Efi. There is no IAC on this setup and idles fine when warm, but this cold start may be an issue which I could see having a Iac would be handy.
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Old 09-01-2017, 01:44 PM   #154
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Default Re: Has anyone here successfully tuned EFI Stack Injection?

Quote:
Originally Posted by a468bu View Post
I believe I have figured it out. It all was all throttle plate adjustment. They need to be closed. They need to be adjusted when the car is Hot. But right now as the car cools down they stick in the bores. So they car will have to warm up until your able to drive it. I have no done a cold start yet with them adjusted this way, so we will find that out today. I am also probably going to cut the shafts in half and get the adjusters Hilborn has on their setup. I was told .002 clearance but that's for mechanical injection not Efi. There is no IAC on this setup and idles fine when warm, but this cold start may be an issue which I could see having a Iac would be handy.
There's a lot of finesse into getting these units to perform properly. Are you for certain it's all blades sticking when the engines cold? Maybe it's just 1?? Personally I'd pull 1 blade at a time until I found the culprit or culprits then pull the shaft and do a light hone on that hole or holes. I'm pretty much confused on this holley system. What makes it idle? The map and a/f reading? And this setup has no air temp sensor?
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