99 1.8 - Subaru TD04- High 12s 1/4 mile pass
 

Been meaning to post this for a while now, numbers are flywheel

99 1.8 NB
Stock long block
2.5" Downpipe, stock cat and center to 2.5" Cobalt silencer
Subaru TD04-13T
650cc EV14s
MS2 Enhanced by MSLabs
20% Methanol premix in the fuel tank
Self tuned

Boost target is 12psi up to 5000rpm then tapers upto 15psi by 6000rpm

Attachment 230534

Best 1/4 Mile last year was a 13.41 @ 106mph, no idea on the power but an educated guess on 210-220flywheel based on the 10.5psi boost target that day

I'd make a guess of about 230bph, or around 200-210whp based on a 106 trap speed. Unless your car is significantly lightened.

Great work out of the td04, torque looks super usable too!

Hit the local drag strip again today

Came away with 3 runs @ 13.0x and a PB of 12.91 @ 111mph

https://cimg9.ibsrv.net/gimg/www.mia...3f1874f1b4.jpg

Very nice! You are trapping faster than me and I am pretty sure I have about 250 dyno jet WHP.
You can definitely pick up a few tenths in your launch.

Fitted a 2.5" cat and exhaust and set my base timing two years late.

First run in the graph is with the exhaust second with the extra timing but some boost pulled below 6k RPM

https://cimg4.ibsrv.net/gimg/www.mia...04ed4a1098.jpg

Help me understand what I'm seeing here and it n your other thread.
You are running:

standard TD04L-13T
99RON which is roughly equivalent to US 94 Octane fuel
Making nearly 300 WHP
Stock Bottom End
99 head with VICS
9.5:1 compression ratio

Please correct any errors above.

EDIT: What was outside or MAT temps, and are the results uncorrected?

Correct in above other than fuel, it's 99RON + 20% Methanol making it 102RON

Ambient temps of 16c, MAT 35c. I can't remember uncorrected figures but correct were to DIN standard.

I'm as surprised by the power its making as much as you are, I can only attribute that down to Tyr use of methanol (as close as I can get to E85 here)

I'd call it flywheel power but the base line of 278bhp with a, 111 trap speed is in line with what you would call whp

Eh I don't know bout 280-300whp, here's a compressor map

https://cimg1.ibsrv.net/gimg/www.mia...afa656fd9f.jpg

Not disagreeing with you 18psi.

​I've already studied the compressor map enough to know 275whp should be the absolute most they'll do, hence my thread asking about 19T hybrids.

Methanol does carry an additional oxygen molecule and that does make up 20% of my fuel

The original 279whp figure ties in with my 1/4 mile trap speed, I'm back at the drag strip on Saturday to we will see what happens to trap speeds. 113mph should be expecting at 300whp

Exactly. I think 250 WHP is all this Turbo should be able to produce, regardless of pressure ratio. Or 270-280 bHp. That's why I was thinking possibly a cold day and I corrected numbers.

My understanding is that the oxygen in the methanol is not available for combustion with the gasoline. It's not like NOS.

It would appear that you do a great job in the quarter mile.

Pics of build? I don't find a build thread.

I'll sort a build photo or two later in the week as it's not stored at home, I've never done a build thread.

The numbers I have no idea on, there's always a debate between UK and US dyno figures. I'd call it 300bhp flywheel as that's how dynos are operated here

Honestly it doesn't really matter since we all know that your trap speed is really good for that turbo, and dyno plots can vary so wildly.

I'd love to see pic of your time slip, curious about the rest of that data.

Hmmm, UK, is that some sort of metric 1/4 mile ;)

Be careful, I think my rods started to bend when I ran high octane and trapped 110. My car was never as fast again after that.

It is, a metric quarter mile is 403 meters ;)

I've got two events at the drag strip this month then that's it for the rest of the year, once those are done I'm going to head back to the dyno and play around with boost targets to bring the torque back to a sensible 210-220ft/lbs until I fit a set of runs and run allofit

In for trapping 113 and showing the world a tiny little TD04 can do 300whp though

Not sure where you are getting your HP to trap speed numbers.

A quick search turned up this: Speed vs HP

Which yields this:

https://cimg0.ibsrv.net/gimg/www.mia...f45991b40c.png

Which makes more sense to me. And I think this is a rough attempt at bhp.

EDIT: But the car is fun, yes?

Using this calculator

0-60, 0-100 & 1/4 Mile Calculator :: TorqueStats Modified

Car weighs 1120kg with me sat in it.

The car is immensely fun, and as we all know dyno figures can be debated until we are all blue in the face. Its bad enough comparing dyno numbers from different dynos in the same country let alone on different continents

lol 113 would be nuts. I'd love to see that.

buddy of mine was trapping 118 on a stock long block BP for at least a few track trips before it finally exploded, so I know it's possible on stock rods as long as you do it just right, but I don't think I've ever seen a td04-13t trap 113 before. that's gotta be some sort of record if you pull that off

I see no reason why I won't pick up the extra 1.5mph on the new tune there's an average of 10-20hp more between 5k and 6k minus the weird 5800ish dip. Then peak power is up 20hp and carried for another 700-800rpm

I agree, but I've too often seen theory get crushed by reality at the track :)

Well today was a total fail. two passes (nothing noteworthy) and then it rained all day