fleetwood_limited Posted July 3, 2005 Report Share Posted July 3, 2005 Hello, I have a number of questions, that I would like some input on, while I am rebiulding my 1999 Fleetwood Limited (12" stretch Deville). 1. I have a "Y" code, 275 horsepower. If I "need" new head(s) can the "9" code, 300 horse heads be bolted on my "y" code block? will it fit, will spark timing still work, what are the differences between these motors? 2. My deville "needs" premium gas because it is 10.3 to 1 compression. The 2000 and up devilles are 10.0 to one compression, and therefore only need regular fuel.(as far as I know) Does any body know how they lowered the compression, is it a different head, or different piston, or shorter connecting rods??? I would like to lower my compression, so I only need regular gas, any Ideas??? I am figuring they changed the "flat top" piston slightly to lower compression??? 3. I am going to use the felpro gasket kits available, (conversion, for the block) cs261502 $118. Head set with head gaskets, no bolts hs26150pt1 $179. Head bolts es72186 $26 per head = $52. Or camshaft cover set vs50524r $46, plus exhaust manifold gaskets, and Use the factory headgasket and bolts at $200. I am unsure whether it is worthwhile using the "GM" headgaskets. I have read that the best gaskets are made of "graphite", but I have been unsuccessful in finding out what the "GM" or "felpro" are made of. Any info or experiences would be helpfull. 4. I have found on the internet "domesticperformance.com" list a performance chip for Northstar at $370. Has anybody heard of, or used this chip? 5.I have also found Pistons available for this northstar manufactured by "Enginetech", sold here in Canada, by C&C (519-364-6051) for less than $200 (US) per set of 8. They also have rings at less than $90(US) a set, anybody used these? THANKS!!! Link to comment Share on other sites More sharing options...
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