Gen V 5.3l turbo build - 87 octane and AFM/DOD

BoomBoomBamaPhD · October 8, 2021

1 hour ago, pokismoki said:

yes, college is where the youth go to waste thier parents money getting an degree in something outdated and obsolete

I'll try not to take this personally offensive, but my parents don't make enough money for that, everything I've spent on college has come from scholarships that I earned academically, and luckily only a couple of loans.

And I'm sorry you think that Engineering is outdated and obsolete. I'd love to see you design a production engine.

Sorry for the rant

BoomBoomBamaPhD · October 8, 2021

But so back to the ecoboost, so that is still saying that the engine is taking over 15psi of boost on 87?

I think that's pretty significant. Especially because normal tame tunes won't push beyond 10psi for sake of reliability.

And its the premise of the last bit of the article you have quoted, basically if you want more performance, just fill your tank with higher performing fuel.

pokismoki · October 8, 2021

40 minutes ago, BoomBoomBamaPhD said:

I'll try not to take this personally offensive, but my parents don't make enough money for that, everything I've spent on college has come from scholarships that I earned academically, and luckily only a couple of loans.

And I'm sorry you think that Engineering is outdated and obsolete. I'd love to see you design a production engine.

Sorry for the rant

you'll get skooled kid...

pokismoki · October 8, 2021

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Edited October 8, 2021 by pokismoki

CrawlSlow · October 8, 2021

Lol @ this thread.

The Fast and the Furious is a good source for this type of school project.

Instead of trying to proves what you read on the internet. You should take a moment and listen to those with hands-on experience.

pokismoki · October 8, 2021

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Edited October 8, 2021 by pokismoki

BoomBoomBamaPhD · October 8, 2021

Well when I mentioned the 10psi and reliability I guess I should have specified I was talking about boosted ls applications

Obviously when You add more components and a more complicated system, reliability will suffer. Although ford has to provide a warranty which I'm assuming is the typical 5year 60k miles. So there is something to be said about the reliability there.

And I doubt I would get "skooled," although I wasn't suggesting a competition.

I'll state this again for everyone who continues to view me as some naive and ignorant brat. I understand how to "properly" build a boosted engine, and how everyone has always done it. Not exact components, but fundamentally.

Yes, 87 in a boosted application is improper for maximum performance, I've stated that many times already. Everyone knows that, but it can be done, as shown more than once now.

This thread has turned into the pissing contest that I was trying to avoid.

Thank you to the few of you that attempted to participate in an open-minded conversation while sharing your knowledge.

pokismoki · October 8, 2021

your time would be better spent learning tuning, and hacking ecu's and tcu's, segment swaps., might i suggest this forum https://forum.hptuners.com/

check out the tuning school, that will feed your inner Engineer some knowlege

Edited October 8, 2021 by pokismoki

lucas287 · October 8, 2021

29 minutes ago, BoomBoomBamaPhD said:

Well when I mentioned the 10psi and reliability I guess I should have specified I was talking about boosted ls applications

Obviously when You add more components and a more complicated system, reliability will suffer. Although ford has to provide a warranty which I'm assuming is the typical 5year 60k miles. So there is something to be said about the reliability there.

And I doubt I would get "skooled," although I wasn't suggesting a competition.

I'll state this again for everyone who continues to view me as some naive and ignorant brat. I understand how to "properly" build a boosted engine, and how everyone has always done it. Not exact components, but fundamentally.

Yes, 87 in a boosted application is improper for maximum performance, I've stated that many times already. Everyone knows that, but it can be done, as shown more than once now.

This thread has turned into the pissing contest that I was trying to avoid.

Thank you to the few of you that attempted to participate in an open-minded conversation while sharing your knowledge.

100% doable with 87 octane. My wife's CX-9 has the 2.5 Skyactiv Turbo and it runs great on 87. Madza itself even claims that use of 91+ will give you 10% more HP but the torque down low stays the same. Just a matter of how much resources can be put into the project.

I think it's paramount to have full control over the intake and exhaust valves - independent of each other. That would be the best way to keep the chamber cool and prevent detonation. And that's never going to happen with our engines.

As I'm sure you're aware, you can adjust SOI (start of injection). It's a map that looks very similar to the timing tables where you tell it exactly when you want it to spray (in degrees relative to BDC, I believe). That would probably help a lot. In fact, the stock SOI tables are kind of a mess. I can get nearly the same fuel mileage as stock by disabling part throttle VVT and retarding (delaying) SOI a good bit. The result is a super responsive throttle and great torque production.

Lastly, I apologize if it's been mentioned - but alcohol-based fuels are superior for boost. Their cooling properties alone are a game changer. I can run my 93 tune on E30 (e85 blended with 87 octane) with zero knock at all.

pokismoki · October 8, 2021

I never been able to find SOI in HPtuners for the K2, are you using a different platform like EFI LIVE? I'll look it up.

I played with this feature before on a fuel injected dirtbike and wow throttle response was insane just by re-timing the firing of injector vs valve opening degrees

Edited October 8, 2021 by pokismoki

BoomBoomBamaPhD · October 9, 2021

I am sure i can find it elsewhere, but since we are leading to this topic here.

What all control can be had over the VVT for the 2015 5.3?

obviously with it only being a single cam it is limited for what vvt can accomplish, but tuning wise, what can be done?

And @lucas287, what mix do you use for e30?

pokismoki · October 9, 2021

your on the wrong forum kid, these guys are not hot rodders in this forum.

https://forum.efilive.com/

.performancetrucks.net

hptuners forum

camaro6.com

thetuningschool.com

Edited October 9, 2021 by pokismoki

lucas287 · October 9, 2021

11 hours ago, BoomBoomBamaPhD said:

I am sure i can find it elsewhere, but since we are leading to this topic here.

What all control can be had over the VVT for the 2015 5.3?

obviously with it only being a single cam it is limited for what vvt can accomplish, but tuning wise, what can be done?

And @lucas287, what mix do you use for e30?

I’m not sure how the 5.3 is set up but I believe the 6.2 is advanced 8 degrees until the ECM says to ****** (I think this forum bleeps that word out lol). WOT it starts to reduce that advance at 3000 RPM and by 5000 RPM it’s retarding 8 degrees so it’s straight up. All of that is great. I have no issues with it. However, in the low load ranges .16-.56 g/cyl airmass is can ****** up to 23 degrees. Basically to introduce the EGR effect of cooling the chamber and reducing pumping losses.

And yes SOI is in HPT, what I use. It’s under the spark tab I believe!

lucas287 · October 10, 2021

Didn’t fully finish my thoughts there. So you have the ability to reduce the ****** to 0 for any given rpm/airmass, but that’s it. You cannot advance beyond its parked position. Hope that helps!