So I'm hearing people talking about turboing a non turbo B6 with a B6T Head turbo and all that other good stuff. I'm about to attempt to buy back my old cars and use them as parts. I sold my '87 X1/9 to fund the rebuild of the engine in one of said cars. 27 miles into the breakin period the oil return line ruptured and ruined the rod and main bearings. If I get the cars back (both are XR2's) I have a friend with a good bottomend from a B6 nonturbo. From what I've read the Turbo has a Compression Ratio of 7.9-1 compared to the Non Turbo 9.2-1. Does this sound doable and would the boost pressure be okay if limited to ~10 with a mx6 intercooler????
Wondering if the driveability would be increased by much with the higher compression off boost. Any clue as to how much of a gain in power would be obtained? Off boost its not very "agile"
Well, I've heard a couple of people have turbo'd the Miata engine 
9.4:1 is a lot more fun off-boost than 7.9:1. With good engine management, you should be able to pull 230 whp out of a Miata B6 without any internal changes and a livespan measured in decades. We have a customer with 350,000 miles on his. His clutch pedal has broken in half, but the engine is going strong.
Oh Man.... I may be on to something here! I'll do a clutch while I'm at it. Is the B6(XX)'s crank the same? I installed Total Seal Rings in the engine and would like to scavenge as much as I can. The Head has a fresh reuild on it and the Turbo is a NEW (not reman) VJ-14. I have found a guy that mods the ECU with a chip for very reasonable.... Wonder how hard it would be to setup the hybrid on a MS???
I must have low expectations.... I'm not bothered by my 7.8:1 compression motor off boost. 
But setting up the hybrid should be pretty easy. I'd just go ahead and start with an existing B6 + T basemap.
where can I find a basemap for a b6t?
That sounds really similar to what guys do with the VG30s. That is, run the turbo system off a VG30ET with an intercooler and a VG30E bottom end for the higher compression. Incidentally, that's kind of what we're doing for our 2010 Challenge car.
I'm not gonna be able to sleep tonight.....
Yep, I didn't sleep..... I hope the guys sells me back my old cars!!!!
dansxr2 wrote:
where can I find a basemap for a b6t?
Turbo Miata maps are pretty close except for the ignition. And you could solve that easily enough with a Miata ignition transplant.
