Forced Induction Superchargers | Turbochargers | Intercoolers

Leaning out in boost after driving a while

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Old Mar 6, 2021 | 06:55 PM
  #21  
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I had a similar issue awhile back. Mine was voltage dropping over time as the car was running and stuff warmed up. Soon as I swapped to a better alternator and upgraded the wiring the problem went away.
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Old Mar 6, 2021 | 07:14 PM
  #22  
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Originally Posted by ddnspider
I had a similar issue awhile back. Mine was voltage dropping over time as the car was running and stuff warmed up. Soon as I swapped to a better alternator and upgraded the wiring the problem went away.
was that on one pump or two? But please cinder this think will complete lean out to 13 to sometimes 16:1 at only 5psi with two pumps running. And remember that I have a completely separate circuit to the backup pump that I forced on manually as a test.

o. And remember I put fuel in it, pulled out the gas station and hit it. Did not lean out. I had 5 or 6 gallons in it. I feel like it was heated up or aerated and the fresh, cool 6 gallons I splashed in either cooled things off or got rid of the air bubbles.


I have almost a full tank so I’ll drive the car to work a couple times and then yank the tank and make some changes.
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Old Mar 6, 2021 | 07:32 PM
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One pump when my setup happened. Single 450.
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Old Mar 6, 2021 | 10:06 PM
  #24  
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Originally Posted by Old Geezer
The supply hooked to one side of the regulator and the rail hooked to the other.
Bass ackwards.
This: I moved the supply to the back of the rails with a y and teed the regulator and no more issues.

"and teed the regulator".
I'm assuming "teed" means the ft of rails into the 2 ports on the reg, then the return out of the bottom. Y/N?
yes sir that is what I meant.
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Old Mar 7, 2021 | 06:57 AM
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My FPR is exactly like described. Rail on 1 side and pump on the other and I have no fueling issues.
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Old Mar 7, 2021 | 08:50 PM
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So I did touch the return line today and it was pretty hot. It’s closer to the exhaust manifold than I thought/remembered. I’m going to put a dei heat sleeve on it to block the radiant heat. I drove it around for a few hours today to run the fuel out. I didn’t get the tank low enough just yet to pull it. I’ll yank it out next weekend, shorten the return in the bucket. I ran into another issue. I keep blowing the dipstick up at high boost. So now I have that to address too. I guess my pcv system doesn’t flow enough. Meh.
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Old Mar 8, 2021 | 06:22 AM
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Do you vent both sides or recirc to the intake?
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Old Mar 8, 2021 | 07:30 AM
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Originally Posted by ddnspider
Do you vent both sides or recirc to the intake?

I have a 3/8” rubber line going to each valve cover and the valley cover. All three lines go to my catch can. Then the top of the catch can used to have a big filter but quite a while back I put a 3/4” hose with a 90 elbow going into the top of it. That hose runs over to the turbo, it’s connected to the air filter side....acts as a vent that’s under a little suction, especially under wot. For some reason, it’s not keeping up anymore.
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Old Mar 8, 2021 | 07:48 AM
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Originally Posted by Kfxguy
I have a 3/8” rubber line going to each valve cover and the valley cover. All three lines go to my catch can. Then the top of the catch can used to have a big filter but quite a while back I put a 3/4” hose with a 90 elbow going into the top of it. That hose runs over to the turbo, it’s connected to the air filter side....acts as a vent that’s under a little suction, especially under wot. For some reason, it’s not keeping up anymore.
I would ditch the change you did, and go back to the big filter. Never seen an issue when both sides are just vented.
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Old Mar 8, 2021 | 08:30 AM
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Originally Posted by ddnspider
I would ditch the change you did, and go back to the big filter. Never seen an issue when both sides are just vented.
got it. That’s what I’ll do.
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Old Mar 8, 2021 | 12:30 PM
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Stupid question but have you checked your fuel filter?
I had a weird fueling issue where I would go lean after cruising and after dicking around pulled the fuel filter because it was the one item in the fuel system I hadn't touched and it was plugged so bad I couldn't blow air through it.
Replaced it and picked up almost a full point of AFR and car ran way better too lol.
Who knew?
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Old Mar 8, 2021 | 12:59 PM
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Originally Posted by The ******
Stupid question but have you checked your fuel filter?
I had a weird fueling issue where I would go lean after cruising and after dicking around pulled the fuel filter because it was the one item in the fuel system I hadn't touched and it was plugged so bad I couldn't blow air through it.
Replaced it and picked up almost a full point of AFR and car ran way better too lol.
Who knew?
only fuel filter I have is on the end of the pumps. Those are both pretty new. I wouldn’t think that adding gas to it would help the filter flow better tho.
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Old Mar 8, 2021 | 03:02 PM
  #33  
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Originally Posted by Kfxguy
only fuel filter I have is on the end of the pumps. Those are both pretty new. I wouldn’t think that adding gas to it would help the filter flow better tho.
I was running a stock style system and the previous owner claimed the car was meticulously maintained, meticulously maintained excccccept for the fuel filter.
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Old Mar 9, 2021 | 02:10 AM
  #34  
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Originally Posted by Kfxguy
only fuel filter I have is on the end of the pumps. Those are both pretty new. I wouldn’t think that adding gas to it would help the filter flow better tho.
The pump inlet filters are course. A fine element filter is needed past the pump outlet.
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Old Mar 9, 2021 | 04:50 AM
  #35  
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Fuel heating doesn’t seem to be an issue with e85 even with a large single pump. Or maybe it’s the lower under hood temps with a Procharger that prevents my fuel from getting hot enough to be a problem. Even at low tank levels it’s not an issue.

moral of the story is use e85 and switch to Procharger...lol. Just giving you a hard time of course.
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Old Mar 9, 2021 | 12:57 PM
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Originally Posted by CarlC
The pump inlet filters are course. A fine element filter is needed past the pump outlet.
my car doesnt have an external fuel filter.
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Old Mar 9, 2021 | 03:35 PM
  #37  
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Moral of the story... it should.
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Old Mar 9, 2021 | 03:56 PM
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Originally Posted by tblentrprz
Moral of the story... it should.
I’ll be sure tell Pontiac that.






lol.
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Old Mar 9, 2021 | 04:33 PM
  #39  
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Originally Posted by Kfxguy
I’ll be sure tell Pontiac that.






lol.
Doesn't stop you from doing it yourself. There are a lot of things the manufacturers could do differently that's why us enthusiasts exist and do what we do. Besides Pontiac doesn't exist anymore so you couldn't tell them if you wanted to and our cars are actually Holdens...LOL
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Old Mar 9, 2021 | 04:51 PM
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Originally Posted by BCNUL8R
Doesn't stop you from doing it yourself. There are a lot of things the manufacturers could do differently that's why us enthusiasts exist and do what we do. Besides Pontiac doesn't exist anymore so you couldn't tell them if you wanted to and our cars are actually Holdens...LOL
that was the joke. It actually had a filter in the bucket, but that’s gone. I might add a filter. I just didn’t want to:
1) cut the fuel line
2) have more connections
3) possible path for more leaks
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