This 1987 Buick Regal T-Type was built by owner V12Buickguy with a 5.5 L M275 V12 from a 2005 Mercedes SL600. They upgraded the V12 with FIC 1200 cc injectors, LSx coil packs, Megasquirt MS3Pro ECU, and two Precision PTE 6266 turbochargers. The engine made 640 whp on 14 psi of boost and pump fuel but now is running 24 psi of boost and E85 fuel. Behind the V12 sits a Mercedes 722.6 five-speed automatic transmission with a PCS TCM-2800 transmission controller and Sound German Automotive high-pressure valvebody. A custom Driveshaft Shop driveshaft sends power to a GM 10-bolt rear end with a locking differential and 31-spline axles. The Regal rides on QA1 double-adjustable coilovers in front, TRZ Motorsports custom valved AFCO double-adjustable rear shocks, Mercedes E55 8-piston calipers with Corvette C6 Z06 rotors, and a set of Weld RTS S71 wheels (18×8.5, 15×10).
Source: V12Buickguy via Richard
V12…twin turbo…a bar of boost=only 640 hp??? Seems like a bit of a let down for all of that.
Factory rating for the M275 was 510bhp, probably closer to 450whp. Now it’s up to 640whp which is a theoretical 142% increase. That’s pretty damn good.
142% would be 1090hp.
Nice maths 🙂
Sorry, tired math. Still 142% of the original power. Still makes the same point.
Must be using common core…
It went from 510 BHP to 640 at the wheel. Also, the article didn’t say anything about torque; I would suspect very healthy numbers coming from a high displacement motor helped by turbocharging.
Or maybe they chased “the muscle car spirit” and not “the Honda Civic with a turbo and a fart can spirit”.
Anyway, it looks like nice work by qualified people.
Really sad and pathetic. There are guys running 800hp on v6, stock 109 blocks with a single turbo and guys running over 1,000hp on v6, stage blocks with a single turbo. Oh, and for cheaper. So yeah, those power numbers and the time would make me sad. Not to mention, you thought Buick parts were unreliable, how about Mercedes parts.
There’s no point to this – just a waste of time and money. You can make 800 hp with a 3.8 Buick stock block single turbo which is more than enough power to overcome any possible traction set-up you can put on the street. A prepared dragstrip can handle more power – and in that case you should build a purpose built race car – because that’s your competition after all..
640hp? Pfft, 2JZ single turbo FTW
142%?????
😅😂🤣
For a fraction of the cost of that swap you could of had a ls7.
I am wondering if it was faster than the 1987 Grand National…
Nicely done, but I don’t see the point? You could have gotten the same power if you built up the original V6 and went with a bigger turbo over stock. A lot less time and money for the same result. To each their own, but I’m not getting this at all.
What’s not to get ?man wanted a better balanced German 12 in his old classic American like nooo one her knows this guy or his intentions he did what he wanted because he can iregarless of time or money that his his own not me you or any one else’s . Not coming at u but again to each is own like you said Nam sayyyyyin!!!
I couldn’t agree more. Sad that all these chuckleheads in here think it should have just stayed a boring old regal. The point of the website is engine swaps…
It’s his car, he liked it so he did it. Kudos to him. I, for one, dig it.
“Locking didferential”? You guys should know better, its not a rack crawler! LSD might work better than an air locker or whatever
LSD can still slip, thus “limited slip”. Air locker can 100% lock.
Nice build man I’d love for you to throw that 3.8 turbo in the Mercedes body. I wonder what all would fit. Best interior and comfortability with a Lsx…
I love these guys who claim that their cars are “built not bought.” So YOU rebuilt the trans, completed the paint and bodywork, troubleshot the swap, tuned the motor and trans…. All by yourself. Really? Maybe we have different ideas of what “buy” means. Spending 50 grand for other people to do the work means that you BOUGHT it!