The Car Shopping Round (Round 64): Tears in Heaven

Is it just me or does this name sound familiar somehow?

I probably should have used the BMMA brand or the Iurlaro…

The GSI Artemis is not your mother’s station wagon. Designed by manly men for doing manly man car things, like doing a casual reverse entry drift into the preschool parking lot. Available with an optional plexiglass cabin divider to muffle the screams of your booger-eating demon spawn.

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1995 Boyd Primacy Estate

The comfort of a premium vehicle, the practicality of a wagon, the driving enjoyment of a sports car and the reliability and safety of a Boyd–the Boyd Primacy Estate.

RRP $16,800

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Oh dear, this one ties with the Chaucer, for me.
Love that Hyundai XG front end. <3


3-4L engines? pfft.

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Do you and/or your family have some petrol in their blood? Don’t worry, we have got you covered.

Introducing the 1995 Dragotec Helios

This machine makes carrying your suns and/or daughters to school effort and painless, while revving freely towards 7700 rpm, delivering 292 hp at 6900 rpm and at least 315 Nm of torque from 1800 to 6500 rpm.

But isn’t a one trick pony, nay, featuring a highly advanced double wishbone / multilink suspension the Helios both flies through corners and over bumps effortlessly, its alloy wheels wrapped in sticky (and commonly available) 245/40r17 rubber, its chassis finely tuned for maximal cornering precision. Yet, its seats are wrapped in leather and its speakers are plentiful.

The Dragotec Helios, now yours for 17,400

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damn nice torque band. i never managed to make it be flat that far

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I’m curious what trick he used as well. Usually the turbine minimum size is a limiting factor; maybe quality slider?

Quality slider doesn’t change a sh… in the shape. Rather a proper VVL setting and a wide rev range with maximum boost. Oh, and the minumum size in an I6 is rarely limiting.

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We all know that @oppositelock is the king of flat torque curves :slight_smile:

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Simple: it’s an inline 6, so it has a single turbo. Just combine a smaller compressor with a higher AR ratio and match the cam profile. Appropriate ignition timing is a must, that’s where oppositelock’s ignition theory comes in.

Here’s an example:

McHorseguy - Family 144.zip (17.4 KB)

If you want it perfectly flat for a long time I can do that too, just, this one more closely replicates the curve used by Dragawn, with the same volume (and I bet you, same dimensions). Also the same technique oppositelock uses, incidentally, so I’m totally busting the trade secret out here :stuck_out_tongue:

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Hah, I guess @strop really got the cat out of the bag.
Strop’s creation was pretty close, just a bit off with the cam profiles and with 80% of the boost.
This is the turbo stats for the CSR 41 engine:

Without an undersized compressor the graph would look more like this:


The used cam profiles are 32 and 77.

The CSR 41 engine isn’t 100% fine tuned though, just noticed that a bit more compressor benefits the torque curve.

Nurini - CSR41 - Dragawn.zip (25.2 KB)

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Aha, you went air-air. If I knew the mass of the engine I would have nailed that part too :stuck_out_tongue: As it were using water-air, the rest of my adjustments were such that I had a slight (but only slight) improvement in efficiency. Would be several kilos heavier but.

Yeah, I went as light as possible on this challenge, as raw hp didn’t matter as much, and another reason…Ah yes the servicing, so for simplicity’s sake too. Impressive replica, it was only a few hairs off, you indeed nailed the bore x stroke :stuck_out_tongue:

WHO NEEDS TURBOS. AHAHAHAHAHAHAHAHAHAHA

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Now post your mileage

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haven’t i already? i made a wildcard. 7.5L OHV with double 4 barrel carbs. it’s 18.1mpg
:joy:

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Something tells me that engine would be more popular in a semi rather than a sporty wagon. :joy:

I would call you crazy, but you need turbos before I can pass my crown of insanity on to you for that.