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20b Single Turbo Ideas?

Old 04-27-2005, 06:28 PM
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Anybody care to offer info or input on a 20b single turbo....thinking about a To4. Want about 420-450 whp @ 8lbs. Thanks
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Old 04-27-2005, 08:29 PM
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HKS T51R SPL
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Old 04-27-2005, 11:14 PM
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I would say that a t04 would be to small for a 20 unless you try a T04S or Z.. Make the choice of what type off driving you plan on doing more and consider the RPM range you want the power to come in at.
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Old 04-28-2005, 08:47 AM
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I am also interested in what others have done with a 20B. I am currently looking to place an ex-Camaron Worth Bonzat TT 20B into my vintage IMSA GTO car (the Corona Lite car) and am going to have a hell of a time getting the intake system under the hood! Since I am looking for an endurance racing set up, not a drag racing set up, I won't be looking for MAX HP. Should I stay with the TT, or is a single turbo workable?



I also have a Mandeville built 20B short block as a spare back up, so I'm willing to push the envelope somewhat



[attachment=30472:attachment]

[attachment=30473:attachment]
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Old 04-28-2005, 11:14 AM
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Nice project Mr. G Who built the chasis on the GTO? Know who drove it when it was new and years? Should have fun with it.
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Old 04-28-2005, 02:23 PM
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that car looks pretty nice. should look awesome when finished. any leads on teh healight kit?lol

looks like a nice first gen in the corner too....
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Old 04-28-2005, 05:11 PM
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The car was built by Joe Carr in Petaluma originally for the Trans-Am series in 1988, but they wouldn't allow Rotory power so the car was then made legal for IMSA GTU. Originally sponsored by Corona, the twin cars raced at portland, Del Mar and Kansas in 1989, then many IMSA events in 1990 and 91. In 1992 the original owner (John Daly of San Diego), sold them to Gary Biehl (current crew chief for an ALMS Porsche Team). They ran a few more events in 93 and 94. My car was then sold to Ralph Thomas of North Carolina who campaigned her at Sebring and Daytona until 1996. Several well known Mazda drivers were part of those teams. Car never placed well. In 1997 the car was retired. I bought her last year out of Roger Mandevilles shop with a new 20b short block installed.

At Sebring in 1990 [attachment=30478:attachment]







Here is another car of mine



and another

[attachment=30480:attachment]



My NASCAR 1st Gen Video
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Old 04-28-2005, 07:13 PM
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What are your goals power level wise? You can spool a pretty decent sized turbo easily with a 20B. I would run a GT42R or something similar I can get a good sized undivided T6 turbine housing for it if interested. Should run nice and make good power easily. I would definitely drop the twins.
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Old 04-28-2005, 08:06 PM
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T6? What the **** does that look like compared to a t4?
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Old 04-28-2005, 08:17 PM
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Cool history on the Mazda. Did Lance Stewart drive it in the early 90's? It is starting to look familiar but the Corona livery does not come to mind. I have a guy J.R. at Just Racing putting my 1993 20b single turbo together. He's been doing Mazdas forever but has always shied away from publicity. It's going to get me out on autox (at least) and my 14 and 11 yo sons MIGHT get to drive it if they act right when they are old enough. Maybe some track time will follow..probably have to track it once my license is gone!!! Hoping for 500rwp @ 10 pounds and run it on the spring for the street. I'll post some pics soon.
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