xbeerd 2 Posted February 13, 2013 here is another one i've done. its for builders of 'frankenmotors' which is a 2.5L subaru engine block with certain year 2.2L engine heads on it, it creates a high compression 2.5L motor. they are built on the cheap for good bang for the buck. with some fun low end torque I thought this worked out well for a logo... and hopefully others do to. i cant take credit for all the artwork as i snagged some of the graphics from the google. but i did have to draw the path around the whole frankenstien head and pistons after i assembled the image as i wanted it. i can draw, im just really trying to get a better idea of how well the machine handles etc. and good ol google images saves alot of time time. (sideways pistons cuz subarus have flat motors ) 1 Share this post Link to post Share on other sites
Rodger 527 Posted February 13, 2013 Is it an opposed engine ? Share this post Link to post Share on other sites
BrianMaruska 12 Posted February 13, 2013 Boxer engines. Share this post Link to post Share on other sites
Rodger 527 Posted February 13, 2013 I never knew Subaru made any opposed engines . Read up a little on them ... sounds like they have plenty of head gasket issues without the extra compression . Share this post Link to post Share on other sites
xbeerd 2 Posted February 13, 2013 yeah its a horizontally opposed/boxer engine. re: headgaskets, typically the REAL bad years would be the 2.5L DOHC motors (EJ25D) from 96-99, pretty much guaranteed to fail. it was due to a design flaw in the headgasket itself. which has eventually been worked out. so now days, if you come across one of thse cars on the cheap that wasnt owned by a total idiot who drove it home from where ever they were when it was overheating, you can swap the headgaskets with the newer designed gaskets and be trouble free for the rest of the time you own the car, 100k+, for the frankenmotor setup, we use a custom made gasket from Cometic which is made for race applications. and has been documented as being trouble free as long as you keep the stock cams, with other cams, youd need to (well.. dont NEED to but its recommended) to go with an aftermarket engine mangement system. i cant speak for anything much newer than 2004 really. as i dont have anything newer than the 04 models. the builk of the HG problems are relating to the 2.5L engines. from 96-2002, the single cam 2.5L got a redesigned head gasket, but it wasnt the failproof design which they later found out. LOL. basically, if you find a 14 yr old subaru for sale that has had its HG's replaced by reputable place (dealer, local subaru mechanic, id trust the local subaru guy a little more than the dealer personally) you should be good to go for another 100k+ i love my subarus, i have 3, technically 4, as the engine from the one that got Tboned(2000 Outback) is now in my 92 Loyale. you take care of them, and they'll take care of you. frankenmotor... this is going into a 99 Legacy GT sedan, who was previously owned by a total idiot. and i got the car for $400 to save it from the scrap yard. couple of the 'fleet' Share this post Link to post Share on other sites
Rodger 527 Posted February 13, 2013 How much does the head change bump the compression ? Reminds me of using the jug off of an older XR 250 on a 86 or newer model . Bumped the cc to 280 . They had lengthened the stroke & downsized bore in 86 . If bought from the aftermarket companies they charged about $200 for a Honda piston that was rewrapped .... once we figured out what it was , $40 from Honda , If you just wanted to bore your jug . If you found the older jug , just change out the parts . Gave it alot more mid-range . A bunch of us were using those for enduros ( timed races thru TIGHT woods ) Share this post Link to post Share on other sites
xbeerd 2 Posted February 14, 2013 its pretty much the same concept as your jug swap. those enduros are sweet, i keep my eye out for those on craiglist but they are just outta reach, unless i wanna rebuild it from the ground up. the stock 2.5L motors range from 9.5:1(phase1, the dreaded dual cam motors) to 10:1 (the phase2, model year 00-04 etc) compression ratio. since 99 was a transitional year between a few different lines of their cars. some cars got the new block, some got the old one, my car got the upgraded block, so basically, i am going from a 2.5L Dual Cam 10:1 CR engine to a 2.5L Single cam 10.6 CR. so its not THAT drastic. i could theoretically, put the rest of the parts together, and make a low compression 2.2L motor for a turbo application. LOL. it works in the opposite way too. not as common tho. i would like to try that (minus the turbo), and fit a carbureator to it, mate it to a honda goldwing trans (or possibly a trans from a transverse AWD engine car (such as a Mitsubishi 3000gt etc) and put it into a motorcycle frame, that'd be weird.. or try a rear mount turbo setup (which is jjust weird, but people do it) Share this post Link to post Share on other sites
