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My "Official" Stepside Restoration Thread and LS Swap 2021

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So a little update:

I have reset the tune and have been driving the truck all over the last 3 days. The EZ ECM has taken very well to the new single plane manifold. I still haven't gotten around to changing the plugs but just the way it drives and responds tells me that they are going to be much improved. It idles smoother and the idle doesn't quite make my eyes water anymore though it's still a touch rich. Low rpm response and power is improved. Upper range power is about the same though I think I need to bump my timing back a little as I think I am getting some slight pinging. It's currently at 38* total. Also my clutch seems to be slipping on full throttle 4k+ rpm shifts so I've been taking it a little easier until i can take a look at my clutch linkage.

My only other quirk that hasn't totally gone away, though has only happened once since the retune, is cold engine returning to idle. This happens when the engine is warming up between 140* to 170* where you are driving and you clutch in, brake, and turn all at the same time. The engine drops back to idle, stumbles and wants to stall as the IAC trys to play catch up. A quick blip of the throttle cleans it up. This used to be pretty bad but is much improved now though not gone. I'll mess with the warm up enrichment settings and see if i can get it to go away. It would be nice to concentrate on the road and traffic and not have to stare at the tach to see if it's going to stall while the engine is warming up and trying to make a turn. It's weird because dead cold, or at operating temp it doesn't do this, only while warming up.

Overall, absolutely worth it. I've even noticed while loafing around in 5th I don't need to downshift on the same hills that I'd always have to drop back to 4th. That right there is amazing.
 
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From all the research I have done it seems single plane intakes work best for EFI.

The sole downfall to it seems to be that the fuel isn't preheated anymore making it easier to burn, as it's basically a straight shot into the head.

I'm excited for my cam and intake swap just to see the changes.
 
Something else that crossed my mind. The intake preheating theory only technically holds true on an LS engine where the antifreeze doesn't go through the intake, which is why they run a coolant line through the TB on the LS engines to prevent icing of the blade.

So a BB/SB would heat the intake via antifreeze, so I guess in reality it's preheated as well, because I imagine I doubt I'll be able to get my IACs any lower than a LS engine. So maybe there really isn't a downfall to a single plane on an older engine in an injected setup.
 
454Sub said:
Something else that crossed my mind. The intake preheating theory only technically holds true on an LS engine where the antifreeze doesn't go through the intake, which is why they run a coolant line through the TB on the LS engines to prevent icing of the blade.

So a BB/SB would heat the intake via antifreeze, so I guess in reality it's preheated as well, because I imagine I doubt I'll be able to get my IACs any lower than a LS engine. So maybe there really isn't a downfall to a single plane on an older engine in an injected setup.
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I’m coming to the conclusion that the single is needed for any batch fire injection, even though mine hasnt shown a lot of issues at the plug, the low mid i still can’t clean up 100%
 
454Sub said:
Something else that crossed my mind. The intake preheating theory only technically holds true on an LS engine where the antifreeze doesn't go through the intake, which is why they run a coolant line through the TB on the LS engines to prevent icing of the blade.

So a BB/SB would heat the intake via antifreeze, so I guess in reality it's preheated as well, because I imagine I doubt I'll be able to get my IACs any lower than a LS engine. So maybe there really isn't a downfall to a single plane on an older engine in an injected setup.
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I would agree. As long as the intake runners are long enough to support some low end. This is proven with the different style LS intakes truck vs car.

The coolant line on the GenIII 3 bolt throttle bodies isn't necessary. Like you said Its only there for extreme cold to prevent the blade from icing up. They eliminated that coolant line to the throttle body on the 4 bolt GenIV and V so it couldn't have been that beneficial even in extreme cold. If anything I would think a warm throttle body would reduce efficiency and power since its heating the air as it passes through. The colder the IAT the more dense the air charge.
 
The IAT is in the MAF before that coolant line though. So the computer couldn't even compensate for it if it wanted too. Which never made sense too me, I'm installing my LS3 MAF in the 90* elbow somewhere, so it actually gets the correct temp air going into the motor.

The only honest downfall I can see to the single plane is just fitment. I mean my BBC setup with the elbow is tall when you factor in the air gap intake. I wasn't going out of my way to far to find the correct shorter single plane though, mines full blown rectangle port.

And the runners being raised off the valley floor just looks f'n cool, 10hp lost below 2500 rpm be damned.
 
Ya my Holley Strip Dominator single plane intake is an inch or two taller than the Edelbrock RPM Air Gap I had previously. Height isn't a huge problem for our trucks. Literally so much room for activities!
 
KirsL said:
Sucks that you don't have the space to keep the old girl at home.
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I do have a dedicated garage spot for it at home but that means I have to play musical cars every time I have to plow. So now the daily Jetta gets to sit inside which is greatly appreciated in the winter. Plus with a baby on the way I am definitely not going to have the time to do anything to it this winter. Luckily I have the hook up and this building is owned by my inlaws so no storage fees and anytime access. Plus she has plenty of other classic car friends to slumber with.
 
Chevy305 said:
I do have a dedicated garage spot for it at home but that means I have to play musical cars every time I have to plow. So now the daily Jetta gets to sit inside which is greatly appreciated in the winter. Plus with a baby on the way I am definitely not going to have the time to do anything to it this winter. Luckily I have the hook up and this building is owned by my inlaws so no storage fees and anytime access. Plus she has plenty of other classic car friends to slumber with.
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Baby :yikes:!


Congratulations man.
 
Chevy305 said:
I do have a dedicated garage spot for it at home but that means I have to play musical cars every time I have to plow. So now the daily Jetta gets to sit inside which is greatly appreciated in the winter. Plus with a baby on the way I am definitely not going to have the time to do anything to it this winter. Luckily I have the hook up and this building is owned by my inlaws so no storage fees and anytime access. Plus she has plenty of other classic car friends to slumber with.
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Congrats! :waytogo:

When's the big day?
 
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