Map sensor port relocation

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Nov 6, 2025 | 05:59 PM

#16

Scndsin

FTE Chapter Leader

Joined: May 2006

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From: Central Mississippi

I broke a couple top ring lands in my mild 5.8 trying to use 89 & 19lbs injectors.

The pimp uses 30* static timing & they insist on premium

Nov 6, 2025 | 06:48 PM

#17

rwfid

Mountain Pass

Joined: Feb 2017

Posts: 183

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From: Kentucky

My truck is built to run on 87 octane, which is midgrade fuel where I lived in Idaho. I had no problem shifting at 5500 when running WOT. The timing advance is 31-32 degrees and I target 13.1 AFR. The compression is only 8.78, so about the same as stock. I had ordered 60 lb injectors from Stinger but there was a mix up and I ended up with 80s. Rather than send them back, I gave him the extra $20. I was surprised how well the 80s worked out, and the truck even idles along at 6-7 mph in second gear with no problem. Once you start figure out what causes a lot of the annoying issues that pop up, playing with the tuning gets to be more enjoyable.

Nov 6, 2025 | 09:20 PM

#18

90project5.0

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Does it pull timing quickly when you accelerate then? If I pull the spout, my timing on crank is 12*. Then I adjusted trigger angle until both showed 18. That seems like a lot of timing. Can you adjust the static to be lower and run lower octane?

Nov 6, 2025 | 09:25 PM

#19

90project5.0

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Quote:

Originally Posted by rwfid

I’m guessing you are forced induction running 80lb injectors? My compression is around 9.5:1. I keep my AFR around 13.7-13.9. That’s where she likes to enjoy most on 87.

Nov 6, 2025 | 10:17 PM

#20

rwfid

Mountain Pass

Joined: Feb 2017

Posts: 183

Likes: 59

From: Kentucky

I'm running 20º advance at idle and am all in by 3000 rpm. At cruise, I am experimenting with about 50º advance for economy, and most who I have seen posting numbers who are using AFR 165 heads seem to be running about 32º advance for WOT. The low compression and the aluminum heads would probably allow me to get away with more timing, but I doubt that I would be gaining anything. I'm sure I could run about anything that will run in a gas engine if I wanted to. I have enough injector to run E85, but I don't have enough compression. I did run 85 octane in Idaho at 4800' elevation in a stock 5.8L F150 without any problems so I'm sure I could run it in my current setup. I did find out that it was more cost effective to run the 87 though.

Nov 6, 2025 | 11:10 PM

#21

Scndsin

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Joined: May 2006

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From: Central Mississippi

I don't know about Autotune, but the pimp tells you to lock the advance in the tuner studio, disable the pump or injectors to set base timing over using the SPOUT.

Nov 7, 2025 | 06:29 AM

#22

90project5.0

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Steps 1 and 2 are to hook up timing light and computer. You pull the spout before this to verify where the timing mark is lighting (12* for me) and then put it back in.

Nov 7, 2025 | 07:10 AM

#23

rwfid

Mountain Pass

Joined: Feb 2017

Posts: 183

Likes: 59

From: Kentucky

Both DIY and PiMPx are Megasquirt based, so they probably are very similar in how they work. I haven't looked at what DIY has for options, so I can't really comment on it. Most people on here probably us the PiMPx because it has options specifically for our trucks, including the PiMPxshift, which is popular for the E4OD.