Re: Turbo cam in NA I5

[ejfluhr@austin.ibm.com (Fluhr)]

>Someone else just pointed out that the low overlap of a turbo
>cam is not a good solution for a NA head. Even if it's true that
>the turbo cam has more lift than the _stock_ NA cam, you
>will still have a more poorly breathing engine. Low overlap is
>necessary due to the high exhaust manifold back pressure but
>is overwise not a desireable feature. Get a 272 NA cam or
>similar. There may be alternatives to the $chrick. Call Sport
>Wheels.

Someone posted the cam specs from an '87 200tq earlier.  Just eyeballing
them briefly, they looked similar to the specs from the n/a 2.3L NG engine.

I can get the Bentley numbers for the 2.3L NG camshaft.  I couldn't find
numbers for the 2144cc or 2226cc n/a cams, though. Interestingly, if you
examine the torque peak of the NG vs. the WE/JT/KX engines, it is at 4500rpm
vs 2500rpm.  Perhaps Audi went to the "turbo" camshaft on the NG engine?
If so, that may indicate that the "turbo" or NG camshaft might be an
upgrade for the KX/JT owners.

Later,
Eric
'85 Coupe GT
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Eric J. Fluhr                                Email:  ejfluhr@austin.ibm.com
630FP Logic/Circuit Design                   Phone:  (512) 838-7589
IBM Microelectronics Div.                    Austin, TX