[Upshifter]

Interesting... Thank you.

I did work with BK to ensure I can take the truck from 10k ft to sea level and anywhere in between, and would be sure to do again.

So if I am reading Garrets chart correctly...

Optimistically: 15% loss of 60 lb/min has me at 51 lbs @ ~2.1 PR (vs. not possible stock)
Conservatively: 20% loss of 55 lbs/min is 44 lbs @ 1.6 pressure ratio (vs. 2.25 stock).
Reality might be somewhere in the middle, ~ 48 lbs - I would be happy! Target is >45 and call it a day.

Currently I'm able to just touch 40 lbs/min @ 19 psi - no idea how that translates to PR.

But BK's recommended a stopping point based on wastegates being maxed out and rate of rising temp under boost. Fueling and Knock always looked good.

So my Sherlock-level analysis says the lower Pressure Ratio + CVF intercooler should alleviate both concerns even up here & on pump 91, adding 6-8 lbs/min.

 

[motorhead1991]

How easy is that AM number to fudge? My datalogs show up to 46lb/min and my truck is basically all stock minus my tune. (As far as I know)

 

[Blown F-150]

How easy is that AM number to fudge? My datalogs show up to 46lb/min and my truck is basically all stock minus my tune. (As far as I know)

Low elevation and pushing the stock turbos pretty hard, would make it possible.

 

[Blown F-150]

Interesting... Thank you.

I did work with BK to ensure I can take the truck from 10k ft to sea level and anywhere in between, and would be sure to do again.

So if I am reading Garrets chart correctly...

Optimistically: 15% loss of 60 lb/min has me at 51 lbs @ ~2.1 PR (vs. not possible stock)
Conservatively: 20% loss of 55 lbs/min is 44 lbs @ 1.6 pressure ratio (vs. 2.25 stock).
Reality might be somewhere in the middle, ~ 48 lbs - I would be happy! Target is >45 and call it a day.

Currently I'm able to just touch 40 lbs/min @ 19 psi - no idea how that translates to PR.

But BK's recommended a stopping point based on wastegates being maxed out and rate of rising temp under boost. Fueling and Knock always looked good.

So my Sherlock-level analysis says the lower Pressure Ratio + CVF intercooler should alleviate both concerns even up here & on pump 91, adding 6-8 lbs/min.

Realistically, you're could gain 30-40whp. That's enough to put you at the limit of a stock block.

 

[motorhead1991]

Low elevation and pushing the stock turbos pretty hard, would make it possible.

2800ft is low-ish I suppose 🤣.

That's on 17-18psi as well though. I almost wonder if someone put FRPP turbos on this at some point, but I can't see any part numbers anywhere.

 

[Blown F-150]

2800ft is low-ish I suppose .

That's on 17-18psi as well though. I almost wonder if someone put FRPP turbos on this at some point, but I can't see any part numbers anywhere.

I wouldn’t expect that from stock turbos TBH. I was at that with BW upgrades around 19psi at 3500-4000ft.


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[Upshifter]

Realistically, you're could gain 30-40whp. That's enough to put you at the limit of a stock block.

My first thought was I wouldn't be even close to what you're pushing. Then I remembered you've got a built block.

Really great food for thought, thanks.

 

[motorhead1991]

I wouldn’t expect that from stock turbos TBH. I was at that with BW upgrades around 19psi at 3500-4000ft.


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I'll see if I can get a better look at the tag. I have a dyno sheet (posted in my build thread) of it making 375hp on just 14psi, but that was mostly timing and not boost.

 

[full-race geoff]

fyi - if anyone is seriously interested to see the difference from sea level to altitude, we can calculate and plot it. It takes me about 1.5 hours to do a full calculation on this.

post your exact elevation and engine modifications and I can run the numbers. I can try to do it next week for you and will post up the explanations along with data

 

[mass-hole]

2800ft is low-ish I suppose 🤣.

That's on 17-18psi as well though. I almost wonder if someone put FRPP turbos on this at some point, but I can't see any part numbers anywhere.

I was hitting 38 lb/min at 6500’ on a normal day. Really cold weather i might hit 39 or possibly 40 if the planets aligned.

That was with my WGDC hitting 100%

 

[Upshifter]

Wow that is dang generous!
I might take you up on that, but given the effort I'll wait until I'm 99% ready.

 

[motorhead1991]

I'll see if I can get a better look at the tag. I have a dyno sheet (posted in my build thread) of it making 375hp on just 14psi, but that was mostly timing and not boost.

Nope, according to the tag it's stock turbos.

 

[Blown F-150]

Nope, according to the tag it's stock turbos.

They could be CRPs. I honestly can’t see stock turbos flowing those numbers.


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[Ecojay]

Has anyone installed these yet? I’m getting ready to order some manifolds and was gonna go with the Crp’s but I heard they warp just as bad but the full race manifolds have me skeptical as they don’t have the extra studs

 

[arny2131]

I'll be installing a pair shortly if garrett would finally ship my right side turbo I purchased 12 days ago lol

 

[arny2131]

I am removing a set of crps that are starting to chirp btw

 

[snakebitten]

If you read this thread, your skepticism based on mounting spacing might be diminished.
And the other aftermarket manifolds have pretty much proven that more bolts or narrower spacing didn't solve the warping issues anyway.

Apparently it's less about clamping forces and more about metallurgy and dispersing heat.

 

[Blown F-150]

Has anyone installed these yet? I’m getting ready to order some manifolds and was gonna go with the Crp’s but I heard they warp just as bad but the full race manifolds have me skeptical as they don’t have the extra studs

The extra studs are not required when you use certain materials and they are designed for it.

I haven’t seen anyone else offer a lifetime warranty either.


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[mass-hole]

How easy is that AM number to fudge? My datalogs show up to 46lb/min and my truck is basically all stock minus my tune. (As far as I know)

Its also february. I see a 3-4 lb difference in air mass from summer to winter.

The 46 lbs/min is whats in the tune for the overspeed map for 5500 rpm and thats assuming an intake temperature going into the turbo of 77F. If its 0F outside they can flow nearly 55 lbs.

 

[mass-hole]

If you read this thread, your skepticism based on mounting spacing might be diminished.
And the other aftermarket manifolds have pretty much proven that more bolts or narrower spacing didn't solve the warping issues anyway.

Apparently it's less about clamping forces and more about metallurgy and dispersing heat.

No manifolds proved that more studs work. I havent seen any reports on BD's or the new OE manifolds good or bad.