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Re: Turbocharging a 900s
Posted by Chad [Email] (more from Chad) on Thu, 7 Sep 2006 08:07:38
In Reply to: Turbocharging a 900s, turbocon86, Thu, 7 Sep 2006 07:42:46
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You may want to first check the compression on the 2.1 and make sure everything is in good shape, any issues will only multiplied by the turbo charger.
I would keep the rest of the hardware intact, you may want to go with the slightly larger garret turbo, as spool up will be less of an issue with high compression engine and it could use a bit more breathing on the top.
Turbo injectors with factory 3.0 bar would be good. You can use a adjustable regulator, but I would recommend finding a way to measure a/f if you plan on tweaking your fuel. Thankfully a bit too rich doesn't hurt power in a turbo as much as n/a but you still have to worry about washing the oil of your cylinder walls and bad mpg.
I would look into switch from the crank mounted hall sensor to the distributor one, using a turbo distributor that will allow you to play with timing and will retard timing under boost.
Keeping your boost levels low is key to keeping things together. Ultimatley there is no reason why you can't get a very healthy amount of power out of this hardware, other than the fact that to tune it properly can be very costly and time consuming. Meaning that its probably best to tune it simply and conservatively and leave it as quick car, but no try to make a monster out of it.
Also you may want to consider a basic IC upgrade like the talon sidemount. Keeping intake temps lower will provide an extra margin of safety.
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