Gutsy move! Let us know how it goes 
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Stop sandbagging and get those grapes crushed!
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Nah, I used to have a properly detailed one, but with Maurten, I know I can have three sachets of that, three bars, a few gels and a can of Coke and do 200km like a ride to the shops 
Just gotta focus on what I can control, and not get stressed or go chasing a time, all of that helps me - yay!
@stenard - I honestly don’t know?
Probably 290W on the bars, or 310W on the drops, ish?
IMUK course is up, or down, so it’s probably 300W for arguments sake.
My 100km double loop yesterday was 283TSS 
Looking at being around 400TSS for that bike course on race day, with a more conservative effort, not sure if @SidSnot has calculated it yet, based on his recce either?
I reckon 220W would be better for the first 30km and Loop 1 actually.
Then try and pop it to 230W, and hold it there, then decide for the last loop.
Rides so far this year;
Yesterday
Loop 1 - 259W NP = death
Loop 2 - 239W NP = dying from the first lap, but actually OK! Ran 10 miles off that at 4:40/km, using run/walk.
Felt totally fine all evening and today
June
100TT to Buxton and Back, all aero as I could be.
223W NP. Felt okay, just rained, so got pissed off and threw my toys out of the pram, again.
May
Loop 1 - 240W NP, fine
Loop 2 - 215W NP, started pissing it down, got annoyed and threw my toys out of the pram!
200km ride, sat on the front all day and managed 217W NP.
Felt fine.
Another 200km ride, not feeling so peachy, not as many turns on the front, 202W NP.
Abandoned a 100TT as I felt sick.
Managed 96km at 214W NP (34kmh)
April
First time on the TT bike IRL for 2021, 4:53 100TT
217W NP, felt fine
March
Just one loop - 210W NP
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That still seems really high to me, but ultimately you know you.
If 290 is accurate, then 230 is broadly the effort I would target for a 70.3, not an IM. 400TSS?! 
That’s not even in the realms of the TP chart…
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It’s pretty clear @Poet doesn’t have an FTP that is remotely relevant to the chart though (it’s grossly underestimated)
That’s what I was thinking. I certainly wouldn’t trust the TSS numbers he’s quoting as I can’t imagine his bike computer has an accurate FTP setting at all. But that was why I asked his own estimate. If 290ish is accurate, then 230 is 0.79 IF, and 240-250 is in the 0.85 IF region. That’s high for a half!
It sounds like Poet is an uber diesel engine, and can’t do anything particularly much above what he can hold for hours upon end*. Which is then going to skew the relative numbers compared to the general masses. Which I guess makes sense based on his running pace pbs, which are all basically the same from 5k → HM
*@Poet - do you have a power duration curve from the past year? What does it show? I’m imagining it’s super flat?
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Poets projected power numbers are super impressive alone, nevermind compared to that FTP.
I asked tom pre-kona and he was racing around 66kg I think 2019. His power numbers are same aw poets projecting, but he has a crazy good bike position. Held 41kmh for a 100mile TT fortnight ago for 256AP.
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Yeah - TP, Zwift and Garmin are all synced up to be the same.
The chart is? Or I am?
I’ve done a few 10s this season, which have been in the region of 289-291W. I can hold that for a 25TT, too (going on what I’ve done in the past)
I hate the Ramp Test, as I can barely do over 350W 
But am good at the CP20 one 
I did 276W at Southport Tri and ran 3:45/km off that (albeit for 20km )
@Chriswim - Keep in mind I’m 80kg, so Tom’s absolute numbers are WAY better than mine at W/KG
@stenard - Where do I find a Power Curve on TrainingPeaks?
This supports what I was thinking. It’s not really “normal” to be able to hold the same power for 20ish minutes as you can for 60ish
You are, the idea of TSS as used by that chart would render a 400TSS Ironman leg as somewhere between utterly foolish and impossible. Now I don’t think your pacing plan is foolish let alone impossible, so the likely conclusion is that your chosen FTP doesn’t fit that model.
Whether you want to say you’re some sort of freak diesel engine as Stenard suggests, or you’re too wimpy to work hard so understate any of the shorter durations we can’t know, all we can say is that the chart is useless for you.
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(I can’t edit for some reason) but your implied VO2max and FTP from your run times is also way of kilter with that FTP, but not out of kilter for your IM power plan, so it really likely is that your FTP is way too low and your failure is testing it.
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Interesting. I have similar run times to Poet, yet am a million miles away from his bike power numbers! I’ve tried, but don’t seem to be able to make any headway against that apparent, significant, bike deficit.
Interesting 
, I seem to be the same with regard to FTP (measured indoors as 20min effort). My ride from Sunday would be a 0.84IF!
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But you blew up on the run and you weigh about 6 grams 
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Haha…true on the run…but I am 80kg
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You’re not 80kg’s though, that ~8kg’s means he should have a fair few extra watts to play with.
75 minute half’s and 3.5w/kg are quite suggestive of a low bike FTP.
Although I guess magic shoes have changed that a bit!
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I’d agree with this
And thanks for your input
All seems to make sense.
I wonder if @SidSnot would like to share his TSS from his double loops last month?
But how do you get to one then?
I’ve done every long ride at the power I thought I should be able to sustain for the duration.
I’m more of a “push it up” training type, then a “pull it up” type.
I’ll do 2.5 - 5hr rides at 200-230W with a VI of 1.02.
Just absolutely dialling in that range of power.
@Tupperware - Phew! I recall you saying now. I think @itom150 is also a larger runner?
I always feel massively self conscious lining up on the front row of running races with all the whippets (nowhere in yours or Tom’s league, like!)
@JibberJim - 80 minutes for a half for me. I was 83kg at that point.
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Woulda been 75 at 80kg… okay so my memory a bit off but still.
How do you get it? You don’t, at the moment as it means efforts that are not natural for you and not useful for your training (well maybe they would’ve been a few months back, but not this close to your event) but I don’t think you need to, just don’t worry about the “energy pacing your IM” people saying that 0.8 IF is crazy, because it’s not really 0.8IF for you. (Or maybe it is, but you’ll have lots of time to ponder it as you’re walking from the 8 mile mark)
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Actually made me laugh out loud.
Thanks for the input, really appreciate it 
Normalised or Average? That would be very impressive if you can execute that. I am aiming for 250 in Lanza, the challenge is nutrition. I hit a hole about an hour and a half into the ride, lasts for between 30 and 60 mins. If I get nutrition right it doesn’t slow me down too much, however, if I forget to eat enough, then it really slows my bike leg.