What does the 2.0 pack inside as in internals (Rods, pistons, rings, etc)?

[Thatblu70]

Was curious to know if the 2019 Theta ll engine had any special internals like forged pistons...there is a post in i30 N for the hyundai N lines forum where someone was mentioning that there was some goodies packed into them and that there are shared components in the Theta ll...Just was curious to know if anyone knew anything more about this or who to speak to - to get more information about it. I stuck an endoscope into cylinder three to see if i could get any info and no luck. Just that there were two valves with the letter "D" on them. Like I said if anyone has any more information please , lets chat about this because i am very curious and would love to know.
Thanks and have a great day!

 

[JCtx]

I assume the higher N 2.0T should have upgrades, due to 274/289 rating (vs 252/260), but I only remember reading about forged pistons (a larger turbo for sure), although don't remember where I read that. It probably was on Hyundai's website. Did you check there? The difference is not that large, so both could have the same internals, but the larger turbo probably has a higher boost, so forged pistons make sense. I'm curious too, so will check your thread often.

 

[Thatblu70]

I assume the higher N 2.0T should have upgrades, due to 274/289 rating (vs 252/260), but I only remember reading about forged pistons (a larger turbo for sure), although don't remember where I read that. It probably was on Hyundai's website. Did you check there? The difference is not that large, so both could have the same internals, but the larger turbo probably has a higher boost, so forged pistons make sense. I'm curious too, so will check your thread often.

Im glad you responded! Thank you! so yeah, I think you are right. The larger turbo meaning the one on the G70 right? because the 3.3 TT has smaller spoolie boyz lol. So far you are the only person to respond but I will check on this thread daily because like you, I am curious as well!

 

[Thatblu70]

I assume the higher N 2.0T should have upgrades, due to 274/289 rating (vs 252/260), but I only remember reading about forged pistons (a larger turbo for sure), although don't remember where I read that. It probably was on Hyundai's website. Did you check there? The difference is not that large, so both could have the same internals, but the larger turbo probably has a higher boost, so forged pistons make sense. I'm curious too, so will check your thread often.

The numbers you are talking about are HP/TRQ right?

 

[Thatblu70]

!!!!I DID NOT WRITE THIS, ITS COPIED AND PASTED FROM ANOTHER FORUM!!

1FastStagea wrote this on an i30 n Page...​

"I've always wondered if Hyundai used any sort of different internals for the N lineup's 2.0T engines. I know that the base engine is supposed to be the same Theta II that's used in many of Hyundai/Kia's vehicles but I refused to believe they would be outright identical.

Luckily I have access to some of the OEM specifications straight from Hyundai, and was able to confirm just that.

The Veloster N at the very least (I'm in Canada, we don't have access to the i30 N here unfortunately) I can confirm has a few unique engine internals for it's 2.0T.

So far, I can tell that it has pistons that are unique to the N, no other car Hyundai or Kia currently or previously produced uses the same ones and there's 3 different part #'s for them (I assume 3 different bore sizes in case the engine needs to be bored over during rebuild):

23410-2GTA0
23410-2GTB0
23410-2GTC0

The rods are shared with the 2.0T Genesis G70/Kia Stinger, but no other Hyundai/Kia vehicle uses them:

23510-2G450

The odd thing specifically about the pistons is that the N's compression ratio is the same as other current-gen Theta 2.0Ts at 9.5:1 (save for the G70 /Stinger 2.0T that have 10:1 CR), which means that the piston dimensions are the same as well but it still has a unique part number for some reason. I'm led to believe that they actually use forged pistons of the same dimensions since all other specifications are identical and they would have no reason to create an entirely different part number for it otherwise. I haven't been able to get my hands on an actual piston to confirm though as all parts for these cars are still to land here in North America.

I haven't had a chance to check to see if the crank is unique yet, but that's next on my list. So far it seems as though the cams and valve train is the same as other current 2.0T Theta engines. I'll update this post with more info as I come across it. If there's any other info you guys want me to check let me know!"

I assume the higher N 2.0T should have upgrades, due to 274/289 rating (vs 252/260), but I only remember reading about forged pistons (a larger turbo for sure), although don't remember where I read that. It probably was on Hyundai's website. Did you check there? The difference is not that large, so both could have the same internals, but the larger turbo probably has a higher boost, so forged pistons make sense. I'm curious too, so will check your thread often.

 

[JCtx]

Yeah, that confirms in my view the pistons are forged indeed; that's the only explanation for a different part number. And yes, I was talking about HP/TQ stock figures. And a heads up: ALL of the 2.0Ts since 2016 have 10.0 CR (not 9), which is what my 2016 Optima SX-L had (and what the G70 has). And what doesn't make sense to me is that Optima had 245HP/260TQ (first year with the current smaller turbo; 2015 was 274/269), and with REGULAR fuel recommended. The G70 recommends freaking premium, and only has 252/260, and still felt significantly less peppy than the Optima, when it's only 100 lbs lighter. Doubt the extra RWD losses are that great. So switched to regular, and engine feels the same. No sense in wasting $1.00 per gallon for nothing IMO. It has enough power, but miss the 'wooooosh' you felt with the Optima. You don't feel anything with the G70; it just gains speed at a decent enough clip for our needs, so no complaints here. Thank you for the info; hopefully we can find more . Finally, what makes me mad is the 'lesser' Stinger already has the excellent 2.5T since '22, but not my '23 G70, with the same old platform. Oh well. I have that engine on my 2022 SF Calligraphy, and it's awesome.

 

[Alcyone]

I30n also comes with a different exhaust camshaft. Although its profile is fairly similar to our’s, so it shouldn’t change much.

Then there are different injectors and HPFP. Not sure if these are performance-related or just the consequence of a different engine layout. Ours are not the limit till around 400 hp in any case.

That said, I30 does have like 30 hp more at the same boost levels, so there must be something more to it.

 

[Volfy]

Just because the N cars carry higher HP/TQ ratings doesn't mean their engines have strengthened internals (compared to Stinger/G70). It is likely just a marketing tool to give the N brand an aura of performance exclusivity. Besides, the extra HP/TQ is only available briefly in the "N Grin" mode (or whatever the exact term is). Otherwise, the output is not that much different than Stinger/g70.

The main performance edge the N Veloster and Elantra have is the lighter weight, factory tuned chassis/suspension, and less driveline loss. I drove FWD in my younger days - AutoX'ed them too - and had a ton of fun. But... these days I still much prefer the dynamics of a good RWD chassis. Stinger/G70 stock handling isn't bad, but it does have it flaws, principally the initial understeer on corner tip in. Safe for the street and the typical non-performance-oriented driver. At the track, however, it gets annoying. Proper aftermarket tuning can improve that a lot. The OTOH, handing of the N cars are tuned for track from the factory. That, to me, is the best part of the N cars. They are factory tuner cars.

G70 takes a bit of work to become a "tuner car", but it isn't too difficult.

 

[JCtx]

the N engines definitely have more boost, or they wouldn't have a larger turbo, no? Plus premium fuel is required. By the way, what's the max boost for our engine, with regular and premium fuel? And the N engine's? Just curious.

 

[Alcyone]

the N engines definitely have more boost, or they wouldn't have a larger turbo, no? Plus premium fuel is required. By the way, what's the max boost for our engine, with regular and premium fuel? And the N engine's? Just curious.

I30 runs 1.3 bar as stock boost limit, we run at 1.15 bar.

These are actually only achieved at certain RPMs, as the main target for the ECU is reaching specified torque values. At 6k+ RPM we’re going at around 0.9-0.95 bars, while I30 is around 1.1 if my memory serves me right.

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[JCtx]

So 16.7psi for 2.0Ts vs 18.9psi for 2.0T Ns then. This makes more sense than the same boost. Ha ha. That's pretty mild, right? Wonder if that's with regular or premium fuel. Or what changes with fuel octane? Just timing? Curious about that too. Thank you for the info.

 

[Alcyone]

So 16.7psi for 2.0Ts vs 18.9psi for 2.0T Ns then. This makes more sense than the same boost. Ha ha. That's pretty mild, right? Wonder if that's with regular or premium fuel. Or what changes with fuel octane? Just timing? Curious about that too. Thank you for the info.

Fuel affects ignition timing mostly, you’d have to run into some asinine fuel sample for the car to enforce protective routines (like partially closing the throttle, which naturally cuts the boost output) due to fuel quality. So in most cases it’d be just a bit of a power drop.

It’s generally not the best idea to run low octane on tune setups, though. Worse ignition timings mean higher EGT (exhaust temperature), which can end up detrimental to engine or turbo health.

And yeah, there’s room for boosting up, for sure. Runs just fine up to 1.5 bar (~22 psi), going higher has some issues with the stock ECU limitations. We went up to 1.8 bar with workarounds on hybrid turbo (~26 psi), it does work, but the driveability suffers due to erratic car behaviour.

 

[JCtx]

My car is stock, or I wouldn't use regular. I use regular because I didn't feel any difference with premium. And my G70 basically has the same power numbers than my ex-2016 Optima SX-L (which felt a lot peppier), so didn't make any sense to use premium at $1 per gallon more for 7HP and 0 TQ gains.

 

[G-782307]

My car is stock, or I wouldn't use regular. I use regular because I didn't feel any difference with premium. And my G70 basically has the same power numbers than my ex-2016 Optima SX-L (which felt a lot peppier), so didn't make any sense to use premium at $1 per gallon more for 7HP and 0 TQ gains.

Gear ratio. The g70 would pull on that thing at high speeds. Sonatas and elantras just gave a lot of low end torque