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Posts posted by dcdrechsel

  1. The fact that bank 1 is now acting up suggests that something slipped .There was a similiar case on another forum where the IMS sprocket had slipped .Maybe a false alarm but it might be wise to recheck all cam timing -the odds are in your favor that you have the cam to cam chains right .The other remote possibility is that the cam timing ring bank 2 is bent -(not sure the proper name ).

    Once you decipher the shop manual these engines are pretty easy time .

  2. Don't know anything about QSC .Suggest you contact EBS Racing.com .They should be able to provide some options .One of the expensive parts are piston rings and I think they have a US source .Another option is LA Sleeve -last time I checked they were quoting 1500 for cast iron sleeves -installed -decked and matched to your pistons .This issue of sleeves is very controversial -some say cast iron is fine and others say LNE is the only way to go .If mine blows I'll go with cast iron .

  3. Being first to market can pay big dividends .

    Here is a question......I have the LNE bearing and it has always bothered me that there isn't a seal .I think the seal serves two functions keep grease in and junk out .These motors because of all the cam chains and related hardware shed a lot of junk .What are your thoughts on some type of screen ?There is a post going on Rennlist 996 forum that started me thinking about this again .

    Don't know who you know in South Florida but would suggest that Pedro of Pedro's garage would be a great source to get acquainted with .


  4. First response too cryptic .If I read your description correctly the exhaust cam timing has definately slipped .The reason for the question on the bolts was to ascertain if the sprocket could have been loose and the slot end stoped it (not very likely ).

    This sounds very similiar to the Kellison issue .However .a failing tensioner could also be a potential candidate as well as one of the paddles .It also might be instructive to understand what work was done 3k ago .Just to determine what was touched .

  5. Another idea........Prodriver built a motor very similiar to yours .In fact I think he started with a Boxster S .Probably wouldn't hurt to compare notes on what injectors he used and if he has seen any related issues with his build -specifically did the DME compensate automatically .

    What is curious is that the default maps seem to work fine and it's only in "real time" that the issues show up .This would suggest that the injectors might be ok .

    I'll try not to ask any more stupid questions

  6. Bill-based on the complete answers you have provided it is obvious (to me) that you have given this engine a lot of thought .In one of your ealier posts you mentioned that that the cylinders might benefit from some old fashion technology -cast iron sleeves .My research leads me to the opinion that this is a viable solution .However there is one doubt and that is the different expansion rates of the sleeve and the block .I know that the heat transfer would suffer -something like 7% which I don't think is a big issue .

    As a footnote I resleeved a 235 hp outboard and it worked fine .So in certain cases cast iron and aluminum do mix .

    Would you mind sharing your thoughts ?


  7. Bill -had this product been available last summer I would have purchased it Have you considered other high cost components that need a more cost effective solution such as the variocam actuators ?It would seem these could be a candidate for remanufactuer with proper analysis and engineering .

    Last question -what method did you use to fix the Boxster cylinders ? There is a foregone conclusion that cast sleeves are unacceptable ,do you have an opinion ?

    Than you


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