Has anyone ever done an sr20 swapped sc? i’ve looked everywhere and haven’t found anything. i’m debating on wether to swap my sc with a 1j or sr, obviously the 1j is the safer route but imagine how cool an sr would be 😂

 

I highly doubt it. A top secret Supra MKIV was once swapped with a custom built RB26DETT though-- have to love Smokey Nagata!

The SR20DET has been swapped into The Nissan Leopard aka USDM Infiniti M30 Coupe since its chassis and suspension has a lot in common with the S13 and S14 series.

For a heavy SC chassis it really does help to have the extra torque available from a 1UZ-FE, 2JZ-GE naturally aspirated or any 1JZ-GTE, 2JZ-GTE or 2JZ-GE NA-T engine. For a more high end revvy experience I would recommend the 2.5L 1JZ-GTE Non-VVT-i or 1JZ-GTE VVT-i which both have a higher redline and build their power slightly differently compared to the 2JZ 3.0L engines. In the JDM Soarer Z30's the 1JZ-GTE A/T models came from the factory with 3.92:1 rear differentials but the 1JZ-GTE M/T models all came with 4.08:1 rear differentials to maximize their higher revving powerband and lower displacement with a manual transmission. Low end city engine response could have also had something to do with the 1JZ M/T Soarer final drive ratio decision on Toyota's part.

If you really want the next best equivalent that is more likely to bolt in to an SC/Soarer chassis then I'd recommend you look into getting an Altezza 3S-GE BEAMS 2.0L M/T RWD engine with its VVT-i on the intake and exhaust cams and do a custom build of that with a turbo setup and aftermarket programmable ECU. You should be able to pair it with a stronger manual transmission than the BEAMS engine originally came with.

This is exactly what Toyota TRD did when they took the Supra MKIV racing-- by installing a RWD style 3S-GE into the chassis with a turbo for better weight balance on track. On the street it might not be as ideal as a 1JZ-GTE swap would be however and it will cost more to do than a 1JZ swap would.

But between an SR20DET and 3S-GE NA-T the latter will have higher ultimate limits to work with... and it is far more likely to fit into place in the engine bay with some possibly still available swap kit parts.

Don't get me wrong-- SR20DET is a great classic Nissan engine. It's just not as well suited to a heavy chassis such as the SC/Soarer Z30 as would be a 1JZ-GTE or even a 3S-GE swapped in TRD JGTC race style.

 

Yeah i would have to agree with Kahn that I would rather a 3SGTE to follow history more-so than be boy racer swapping an SR into it. From my search I found that there was a denso supra with a 3sgte; a tom's car with the engine below; and a top secret car.

 

Yes ^^. The 3S-GE, 3S-GE BEAMS and 3S-GTE Gen 1 through Gen IV (or Gen V?) are all stout iron block aluminum head designs which are extremely capable of handling lots of boost and abuse in both circuit racing environments and rallying. They've been referred to as "mini 2JZ" engines. Big power can be made with them (not to the maximum level of a 1JZ or 2JZ of course) with a big turbo and with today's modern turbo technology it's probably possible to match a 3S engine up to a large-ish but fairly responsive turbocharger that would probably edge out with better response than any of the MKIV Supra 3S-GE/GTE racecar engines were able to deliver with the technology of the day they were actively campaigned in racing series.

The SR20DE, SR20DET and the variable valve timing variants of both are aluminum block with aluminum head designs which are well regarded in their own right but perhaps for lighter chassis vehicles than an MKIV/SC/Soarer is.

As a great all-rounder however a 1JZ-GTE Non-VVT-i or 1JZ-GTE VVT-i engine will provide extra torque and a wider power-band for the same horsepower and torque level which is much better suited in everyday use to the somewhat heavy SC/Soarer chassis.