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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
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Just re-did the fuel system on that car with larger lines fitted into the stock locations. Didn't want it to look all hacked up. You can't hardly tell it's modified but for the large Aeromotive fuel filter, and the new, larger fittings at the fuel rails.
Now the engine does not lean out at 5,000rpm as it used to, but it seems we may now be at the limit of the stock Carrera fuel rails.
Still, the owner is satisfied with the results: 752rwhp / 692rwtq on 109-octane
That'll do.

It has a 4-position boost switch, and each click is good for roughly another 100hp:
91-octane West Coast oxygenated pump gas
* 10.0psi = 450rwhp / 430rwtq
* 14.7psi = 546.6hp / 503.3rwtq
VP103 race fuel -- the common high octane fuel the client can source locally
* 18.7psi = 645.5rwhp / 579.1rwtq
VP109 race fuel -- the good stuff he can get for racing
* 23.4psi= 752.2rwhp / 692.5rwtq

And believe it or not, the engine is completely smooth and okay at higher boost pressures than that.
There is no knock.
The rings are special units intended for these boost pressures (not like stock cast iron Goetze/Mahle rings).
The LNE "Nickie" cylinders can take a lot, lot more.
So while that's a shocking amount of boost to some people, it's not a worry with this engine build and that fuel octane. And when possible, we always source the same fuel a person will use. That way we know the outcome should be consistent, with no surprise differences in effective octane and chance of detonation.
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Chris Carroll
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Old 11-24-2010, 03:11 PM
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