LPFP cant keep up with shotgun?

[GreyNBlueE92]

Ive got a single bucketed 450 feeding a single shotgun setup. I'm not going to remove the hpfp filter until I've got an external one, and I didn't drill the rail just yet.

Here and there I get a dip and spike in rail pressure that seems to follow my lpfp. Here's a couple of logs.

I never reset adaptations, maybe that would help? Just thought of it. Just would like a second opinion of it being a hardware issue and not a tuning issue.

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[GreyNBlueE92]

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[iminhell1]

Look at your 'Fuel Mode'.

20 is 'Spool Mode' and relates directly to the dips you're seeing.



Your pumps are fine. The tune could use just a little tweaking however.

 

[GreyNBlueE92]

I see what you mean at lower rpm, but it also looks like it happens at 52-5500 rpm. Would you recommend leaving spool mode on and just lower the max rpm? Or turn it off altogether? E85 with stock turbos.

Trying to tune this one myself. Any help is greatly appreciated! Thank you

Edit: I used the vcv tables as they were posted on vtts website. I would assume they are correct...

 

[iminhell1]

Tony says those tables are a starting point.

I turned spool off. Just easier to DIY if there's less intervention.


Also, I don't recall needing that much WGDC to make 19psi. Might want to look into that. Looking over a few others logs, around 65-70% looks to be average.
*edit
just found one of your old logs, WGDC looks high in that one too.

 

[GreyNBlueE92]

Thanks I'll take a look around, i still have stock charge pipe and dv. Not ideal, but it's what I've got for now. Also I moved the vacuum canisters underneath the wiper cowl adding 5 or 6 feet of vacuum line. Not sure if that would make a difference. Also still on stock airbox without inlets.

 

[iminhell1]

Thanks I'll take a look around, i still have stock charge pipe and dv. Not ideal, but it's what I've got for now. Also I moved the vacuum canisters underneath the wiper cowl adding 5 or 6 feet of vacuum line. Not sure if that would make a difference. Also still on stock airbox without inlets.

You have to get rid of that stock charge pipe. It's garbage and I'm utterly amazed it's not blown apart.

The pipe from Terry and an ebay knockoff BOV would be just fine.
Stock inlets/airbox will make some good power. No need to change unless bling is your thing. I ran high 11's on 100% stock inlet/airbox.

 

[doublespaces]

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