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Re: Power gains
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Posted by SWEDISH DYNAMICS (more from SWEDISH DYNAMICS) on Wed, 20 Apr 2005 19:48:32 Share Post by Email
In Reply to: Power gains, Tim, Wed, 20 Apr 2005 15:41:09
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Tim,
Hope all's well!
The 1985 900T is unique relative to your camshafts. The 1985 exaust cam was designed to open at 56 degrees bbdc and close at 10 degrees atdc. This changed in 1986 with the 61 bbdc and 13 atdc profile.
The 1985 intake camshaft has asymmetrical cam lobes (one lobe smaller than the it's 2nd lobe per cylinder)which was designed to produce a swirl effect and enhance low end performance. This camshaft will reduce maximum flow and is typically replaced with a symmetrical camshaft from the 1986+ applications.
A good combination would be to keep your 1985 900T exhaust camshaft and combine with the 2.1 liter intake camshaft.
Increasing fuel capapabilies via pressure regulation of fuel injector sizing would be a good idea relative to your charge pressure increase.
Another common 1985 modification is to wire the 1986 and up APC wiring harness/connector in place of the 1985 version. This will allow for installation of the modified 1986+ APC control units which could provide a 5-6 psi boost pressure increase over the 1985 modified APC control unit.
Best of luck and regards,
GSK at SWEDISH DYNAMICS,INC.


posted by 64.12.11...

http://swedishdynamics.saabnet.com

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