Max HP this OEM B58 Engine can handle

The 2JZ has been known to achieve around 800+WHP on a stock block. Has anyone pushed this new B58 towards this level? Not sure what is the weakest link, engine or tranny. I am seeing BPUs pushing 500whp and was wondering how far one can go before beefing up engine or tranny.

Stuhagen said:

The 2JZ has been known to achieve around 800+WHP on a stock block. Has anyone pushed this new B58 towards this level? Not sure what is the weakest link, engine or tranny. I am seeing BPUs pushing 500whp and was wondering how far one can go before beefing up engine or tranny.

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Hey Stu!

There are a few people making big numbers on these cars on the stock longblocks. RK Tunes, Twisted Tuning, DreihundertDresden, and a few others are all making north of 700whp/750wtq. Speedy Muffler and Adam LZ are both just about in the 9s in the 1/4.

Currently, the TCU has not been decrypted, and as such, the issue that most are running into is the transmission. Here you can see Twisted Tuning demonstrating the 6th gear slip at around 760wtq



So far nobody has really gotten to the point where the motor is for sure limited mechanically, but I'm sure when the transmission tuning is sorted, that limit will be found post-haste!

difficult to compare a 2jz and a b58 when they are not related... personally i don't want to find out how much it costs to blow up a bmw engine.

Papadakis Racing (1,000 HP) engine, car should be near completion soon:

dc2r said:

difficult to compare a 2jz and a b58 when they are not related... personally i don't want to find out how much it costs to blow up a bmw engine.

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hahaha. Well said. Comparing apples to oranges. A90 Supra is its own kind!

Reppunkamui said:

Papadakis Racing (1,000 HP) engine, car should be near completion soon:

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It's completed...

An Insane 1,000 HP Toyota GR Supra A90 Is Coming To Drift Our World

https://www.supramkv.com/threads/an-insane-1-000-hp-toyota-gr-supra-a90-is-coming-to-drift-our-world.5011

Not sure about max power
But look at the numbers for the stock turbo MKIV Supra vs the less then a year old MKV Supra. I’d say the B58 is pretty robust. 9’s. Stock turbo, tranny and rear end vs 10.8/10.9 2JZ Auto/Manual stock turbo various mods.

Reppunkamui said:

Papadakis Racing (1,000 HP) engine, car should be near completion soon:

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I think he's asking about what they make on stock block, for 2jz's the safe number is 800hp give or take. Papadakis has a built motor so that doesn't count for what he's asking.

Gearbangin said:

Not sure about max power
But look at the numbers for the stock turbo MKIV Supra vs the less then a year old MKV Supra. I’d say the B58 is pretty robust. 9’s. Stock turbo, tranny and rear end vs 10.8/10.9 2JZ Auto/Manual stock turbo various mods.

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Apples to Moon Pies...

The 3? MKV's in the 9's are all on upgraded turbos and spraying nitrous out of the hole and all of the way down the track. The ability to the load the drivetrain ,spray down a 1.3 60' and just hold the wheel straight does wonders -- isn't technological progression cool?


FWIW that stock turbo list on supraforums hasn't been updated in years and those times were set 10-20+ years ago...!

Blakbird said:

I think he's asking about what they make on stock block, for 2jz's the safe number is 800hp give or take. Papadakis has a built motor so that doesn't count for what he's asking.

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Might be confusion on my part, but didn't Papadakis leave the engine block stock? I remember he ported the cylinder head, changed injectors, rods, camshaft and pistons for the engine. Could be wrong... Papadakis is definitely not running a stock engine...

Reppunkamui said:

Might be confusion on my part, but didn't Papadakis leave the engine block stock? I remember he ported the cylinder head, changed injectors, rods, camshaft and pistons for the engine. Could be wrong... Papadakis is definitely not running a stock engine...

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Generally when people refer to a "stock block", they mean the stock short block/bottom end rotating assembly -- rods, pistons, crank.

AHP said:

Apples to Moon Pies...

The 3? MKV's in the 9's are all on upgraded turbos and spraying nitrous out of the hole and all of the way down the track. The ability to the load the drivetrain ,spray down a 1.3 60' and just hold the wheel straight does wonders -- isn't technological progression cool?


FWIW that stock turbo list on supraforums hasn't been updated in years and those times were set 10-20+ years ago...!

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Ok then, what is the fastest Stock turbo MKIV time then? I love the MKIV too, but there is no denying this is capable to be faster out of the box.

Reppunkamui said:

Might be confusion on my part, but didn't Papadakis leave the engine block stock? I remember he ported the cylinder head, changed injectors, rods, camshaft and pistons for the engine. Could be wrong... Papadakis is definitely not running a stock engine...

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The papidakis engine isn't even really a B58 anymore, no Direct injection, locked vanos, converted to port injection and some other stuff. Also rod and piston upgrades as well.

Stock Block B58 limit, and stock block B58 sustainable limit are two different things. so be more direct in what you're asking.

We are probably over over 800whp currently on our stock B58. just need to get it back on the dyno. For comparison Papadakis made 750whp @25psi on the same turbo we run on our car. We made over 700 dynojet whp on 23ish psi on our first dyno session with the EFR9280. We are now running 29-33psi up top on our car with torque tuned to around the 700-720tq we made prior to keep the trans from slipping in the higher gears.

For the average customer i would tune their car to about 600-650tq max to give them more longevity.

mkivalex said:

Ok then, what is the fastest Stock turbo MKIV time then? I love the MKIV too, but there is no denying this is capable to be faster out of the box.

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I don't know and I don't particularly care whom, 3 decades on, now owns stake to the claim of "fastest stock turbo MKIV". I know what I and friends/acquaintances have personally run, but it's all completely irrelevant to OP's question. Rest easy, though -- I can assure you the ET never has and never will start with a 9.

OP asks a question and instead of providing a tangible answer someone chimes in with "I don't know, but but but.. look how fast the MKV is with nitrous and turbo upgrades compared to a stock turbo MKIV" and even went to the trouble of screen-shotting a 14 y/o thread on SF... Huh..? Inferiority complex..? Odd leaps of logic, at least...

And who is denying the MKV is more capable out of the box? Hence "technological progression".

Well since the MKIV was the bench mark and all the fanboys where killing the V I thought the comparison was relevant. FYI the 9’s have been run on stock turbo, transmission and rear end. I had a 2JZ with a big single and V160 with a Precision 67P with .68 a/r. for years. I was making 700 wheel stock short block which was considered safe. I believe the stock dyno record for the long block was around 1100 whp but that’s not sustainable.