

| Subject: | Re: DJ Compression Ratio |
| From: | Michael Sullivan |
| Date: | Tue, 24 Jun 2008 17:35:46 -0500 |
Chris...looks like you got your filters workin' :-) On Tue, Jun 24, 2008 at 4:52 PM, Scott Daniel - Shazam < scottdaniel@turbovans.com> wrote: > Hi Cris - lol. > I hope you are half sincere about the Soobie comment ! > scott > > > Chris S wrote: > >> Sheesh, Scott that was not picky at all! >> >> I just love how you voluntarily sprinkle us with your Subaru enthusiasm. >> >> On Tue, Jun 24, 2008 at 2:26 PM, Scott Daniel - Shazam >> <scottdaniel@turbovans.com <mailto:scottdaniel@turbovans.com>> wrote: >> >> for the sake of technical pickiness, >> let's say it would be more kosher to say there's a big difference >> btween a CR of 10 and 9.7 to 1 ................. >> IF.........there is proper and even semi-radical valve timing and >> cam profile, quite advance ignitioin timing, and very inhanced >> intake and exhaust systems, and all that .........then, yes, 9.7 >> vs 10 is a significant difference. >> >> giving only two changes that I know of ........the CR and the fuel >> and timing mapping in the ECU..........*nothing* else is much >> differnt......same lame looking intake runners ( look at some >> subaru engines, particularily the DOHC 2.5 for some nice obviously >> flow-enhanced intake runners ) ..........*not to mentioin* hokey >> two valves per cylinders and PUSH RODS !! ( what are 'push rods' >> ???? ..........and 'rocker arms' ???...........are those ancinet >> things associated with 'points'........whatever those are ?? >> >> Think you get my point - given how ancient and crude the >> waterboxer engine is........the dif between 9.7 and 10 to one CR >> is nothing basically. >> >> More : ( I do get carried away - following is just 'more' about >> 'how to get there' engine performance and fuel economy-wise ) >> >> and besides........... >> without KNOCK SENSOR ignition ........how can the engine even be >> really 'smart' about how much power it can produce ? It can't. >> I don't think many people recognize that knock sensor ignition is >> a feedback system - the ECU constantly pushes the timing as much >> as it can.......and gets feedback from the knock sensor when >> timing is 'too much' - conseuqnetly it's opptimized constantly >> according the whatever ignition curve mapping the engineers put in >> the ECU> >> with old and fashioned distributor that either ( 1.9 wbxr ) >> depends on centrifugal and vaccum mechanical devices to make the >> timing 'about right, roughly' most of the time........or as in the >> 2.1 ignitioin timing is determined within the ECU -but STILL >> ..........it's guessing at what is about the right timing for all >> rpm's, loads etc. - without a feedback knock sensor >> ..........Ignition Timing Curve is just like A CARBURETOR - it's a >> crude approximation that gets something within the broad ball >> park of what would really be optimum. >> >> If I was going to 'invest' time in trying to get more out of a >> waterleaker vanagon engine ( and you WILL NEVER GET PAST Push >> Rods and Two Valves per cylinder - though there's been at least >> one air-cooled drag racing VW Bug engine with subaur 4 vavle OHC >> heads put on it )......... >> If I just 'had to' try to get the most out of a waterboxer engine, >> in the electronics dept. I'd try an aftermakret tunable engine >> managment system. >> Links is one. Expensive. >> But then you hook up your lap top to your ECU and you prgroam in >> the timing and fuel mapping that you want, even boost if you have >> a turbo.....all of that. >> >> and BESDIES Again - you will never get past the JOKE 'head >> gaskets' that a waterboxer enigine has, and will ALWAYS have. >> it is PURELY AN ADAPTED AIR-COOLED VW ENGINE. >> >> I love what Pual G. said when he was here- we were ponidering our >> amazment of how difficulut a water pump is to do on a waterboxer >> with the engien in the van...........like they sure coulda made >> that easiier if they really wanted to ! - and it's the main part >> that wears the fastest too- 70K miles is all you can really expect >> for sure out of a w. pump on a 2.1 wbxr engine - he >> said................. >> "VW gave the engineers 30 days to come up with a watercooled >> vanagon engine. " !! >> >> THAT FITS - oh does it ever. >> Subaru Engineers..........and all manufacturers check out what the >> other manufactureres do ..............in 1990 when they were >> coming out with the Subaru EJ22 engines - which is just a >> BEATUTIUFAL piece of automtoive and motor engineering >> ............I'm sure after work at the Saki Bars they just laughed >> themselves SILLY over how much the waterboxer engine is a patch >> job and 'emergency upgrade' to VW's traditionial pushrod Bug >> engine layout. >> >> I 'do' waterboxer engiens all the time - cause I get them >> easily..........cause they're around - I don't hate them........ >> but if you really wanting something enhanced and very worthwhile >> that goes better, and gets better fuel economy and is more >> durable...... >> and has better throttle repsonse, and HOLDS A SETUP WAY, WAY >> BETTER Than a waterboxer Vangon engine ............ >> there are much better more modern engines that will advance you >> light years , and it can be inexpensive too if you do the work >> yourself........... >> I'm, partial to subaru's.........but there are other modern good >> engines too............ >> >> you can only get so far upgrading something in incremental steps. >> At some point to really advance you need a whole new 'clean sheet >> of paper.' >> No matter what you do to a horse-drawn wagon - put an engine in >> it,, put a windshiled on it, put disc brakes on it ......... >> it can never be a car. you just can't 'get there' without >> stepping into a whole other paradigm in design anc concept. >> >> I have core and rebuild-able subaru engines for sale btw.......not >> trying to push that. One of these days i'll have an extensive >> inventory reduction sale. >> >> What I would do - assuming one has the room for a spare vanagon >> ......and assuming one doesn't have 10 grand to just drop on a >> Soobie conversioni................get some totally beater >> watercooled vanagon cheap , .......and get a Legacy Subaru car >> cheap - they go for 300 dollars sometimes - and build up a soobie >> conversioin overtime while keeping your good vanagon for trips and >> so forth. That way you are never without a good running Vanagon. >> And when it's all dialed in, swap it over to your good vanagon. >> Only meant to say - didn't mean to make this about subaru-vanagons >> - ( use some other modern engine , that's fine too ) if you >> really want enhacned performance and fuel economy and real delight >> in an engine ........you can't get there really well with the old >> hardware. it costs more........yes.........that is a problem >> all right - but the reward in the end.......wow ! >> Scott >> www.turbovans.com <http://www.turbovans.com> >> >> >> Chris S wrote: >> >>> So how does it run compared to the stock MV WBX? >>> >>> I'm asking because I have a complete DJ WBX on the way, with ECU, to >>> replace >>> the 1.9L in my '84 Westy. >>> >>> Chris. >>> >>> On Mon, Jun 23, 2008 at 10:13 PM, Kim Springer <kimspringer@rcn.com> >>> <mailto:kimspringer@rcn.com> wrote: >>> >>> >>> Everyone keeps stating that the DJ Engine CR is 10:1, 10.5:1, etc. >>>> >>>> I carefully measured my DJ engine and it was 9.65:1. MV is 8.65:1. >>>> >>>> If you want to round up to 10:1, so be it, but, when it comes to >>>> compression >>>> ratios, 9.7 is a long way from 10. >>>> >>>> Kim >>>> >>>> >>>> >>> >> >> ------------------------------------------------------------------------ >> >> No virus found in this incoming message. >> Checked by AVG. >> Version: 7.5.524 / Virus Database: 270.4.1/1516 - Release Date: 6/24/2008 >> 7:53 AM >> >> -- Michael in San Antonio 91GL AT 'Gringo'
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