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Title: it breathes, but now what does it eat? Post by: nicolas on June 18, 2011, 08:00:58 am i have a question regarding some issues with the 2276 engine i have built. it runs OK, but some issues occured during the break in period of the cam.
one of the pushrodtubes has a leak on the seam (number 4 cylinder) and when the engine is revved up it pours out oil which seems logic to me since there is considerably more oil on the 3-4 side of the engine. but there is also oil coming from under the fuelpump (yes i hope to be able to run a stock oilpump with 48 dells) but that was maybe a bit greasy when i replaced it and may not have sealed properly. and last i have oil coming from behind the glandnut of the pulley... i does not come from the sandseal but from within the pulley. so why does it leak there? i have been thinking that there is a big pressure builtup in the case and that it is forced out anywhere it can be forced out, with the above as a result. so far there isn't any breather system on the engine (i had a breather tower installed on the dynopedestal, but that leaked when i added oil, so i removed that for a closed tube extension) and i haven't drilled the valvecovers yet. so will the placement of a breatherbox and/ or a breathertower solve this problem? or do i need to get rid of the fuelpump and have a breathline there as well? i was hoping to be able to keep the stock pump if possible. thanks Title: Re: letting your engine breath Post by: Lids on June 18, 2011, 08:09:47 am I would say yes, a friend of mine had a big engine built. It was plumbed for breathing but....he didn't vent it to the atmosphere just back into the case and it did the same thing. He phoned me in a panic I popped over and found the problem, I removed one hose from the CB breather tower and viola it was fine.
Title: Re: letting your engine breath Post by: Zach Gomulka on June 18, 2011, 14:44:13 pm I would say yes, a friend of mine had a big engine built. It was plumbed for breathing but....he didn't vent it to the atmosphere just back into the case and it did the same thing. He phoned me in a panic I popped over and found the problem, I removed one hose from the CB breather tower and viola it was fine. Same thing here. When we first fired up AssHull's 1915 it did the same thing, I pulled the filler cap off to finish break in, then re engineered the breathing. Live and learn! Title: Re: it breathes, but now what does it eat? Post by: nicolas on June 21, 2011, 21:30:49 pm i have installed covers with breatherhoses and have been able to fix the leaking breathertower so that solves most of the troubles for now.
but i also wanted to recheck the jets i have used as it seems to run quite hot. i haven't got actual figures yet, but maybe someone can point me in the right direction as well. 2276 engine with an fk8, 9.2 CR, 42x37 valves with 48 tri-jet dellortos, stock oilcooler and fullflow of course main jet 180 air correction 200 idle jet 70 venturis 40 seems to be what is needed, but i care for a second opinion Title: Re: it breathes, but now what does it eat? Post by: javabug on June 22, 2011, 02:32:14 am I've been wracking my brain for a year now jetting my 48 Dells. While I'm no expert, your current jet stacks should be safe to get a few miles on. If it is a fresh motor, it'll be a little warm at first.
Title: Re: it breathes, but now what does it eat? Post by: Peter on June 22, 2011, 07:47:55 am hello Nicolas,
cool to hear its running... dont you have a pic of the motor for us? :) is it for the fasty? Peter Title: Re: it breathes, but now what does it eat? Post by: nicolas on June 23, 2011, 05:35:12 am well i haven't made a picture of the final engine yet as it may still be changing a bit. but it will be used in the fastback for now. However it is a type1 engine... i prefer a type3 with a type3 setup, but i haven't been able to fix the lifterbores and rebuild the type3 engine in time for EBI. so this will have to do.
i bought a bunch of parts here on the lounge from airstuff a year ago with the idea to keep the heads and case and sell the other parts, but the engine he was planning seemed to be a good copy of what i like as well. so i thought of building it and selling it as a whole. so it is a engine with 82 (vw journal crank) lightened flywheel stage 2 pressureplate 94 mahle P&C's he wanted to use a fk10, but i opted for a fk8 scat I beam rods, which i swapped for porsche H beam length rods, Cb rockers 30mm oilpump, system one oilfilter, scat sump steve tims stage 2 heads with 42x37 valves and matchported IDF manifolds 48 trijet dellortos tayco linkage 019 screamer distributor CB aircleaners with special one off velocity stacks made after the original ones from dellorto but made to fit under the filters a bunch of work as litterally not one part fitted right out of the box. i have assembled it so far 4 times to make it all fit and turn. i wanted to learn how to build one of these, but now i really hope to have done it all right and take it to EBI, i just need to get it running in the car now and hopefully my hard work pays off in a nice ride for the upcoming summer as i have missed out on some action allready. Title: Re: it breathes, but now what does it eat? Post by: j-f on June 23, 2011, 08:45:06 am Congratulations for your build Nicolas ;)
that's always rewarding to see something coming to life and work after lot's of head scratching and interrogations ;) See you next weekend. Title: Re: it breathes, but now what does it eat? Post by: Tobi/DFL on June 25, 2011, 16:29:12 pm Hi Nicolas,
cool to see one of my all-time favorite type 3s now getting a lot of horsepower, too! :) Good luck with your new engine! Tobi Title: Re: it breathes, but now what does it eat? Post by: nicolas on June 25, 2011, 18:55:15 pm thanks for the comments. as for the horsepower... i hope it will be there and most of all i hope to finish it all in time and just be able to go with the fastback to EBI.
otherwise there is Speedwells car that seems to be running OK now ;D Title: Re: it breathes, but now what does it eat? Post by: airstuff on June 27, 2011, 20:54:00 pm well i haven't made a picture of the final engine yet as it may still be changing a bit. but it will be used in the fastback for now. However it is a type1 engine... i prefer a type3 with a type3 setup, but i haven't been able to fix the lifterbores and rebuild the type3 engine in time for EBI. so this will have to do. i bought a bunch of parts here on the lounge from airstuff a year ago with the idea to keep the heads and case and sell the other parts, but the engine he was planning seemed to be a good copy of what i like as well. so i thought of building it and selling it as a whole. so it is a engine with 82 (vw journal crank) lightened flywheel stage 2 pressureplate 94 mahle P&C's he wanted to use a fk10, but i opted for a fk8 scat I beam rods, which i swapped for porsche H beam length rods, Cb rockers 30mm oilpump, system one oilfilter, scat sump steve tims stage 2 heads with 42x37 valves and matchported IDF manifolds 48 trijet dellortos tayco linkage 019 screamer distributor CB aircleaners with special one off velocity stacks made after the original ones from dellorto but made to fit under the filters a bunch of work as litterally not one part fitted right out of the box. i have assembled it so far 4 times to make it all fit and turn. i wanted to learn how to build one of these, but now i really hope to have done it all right and take it to EBI, i just need to get it running in the car now and hopefully my hard work pays off in a nice ride for the upcoming summer as i have missed out on some action allready. Hello Nicolas, I am very glad everything is going as expected,and hope to see some pictures and the sound of the engine . I haven't been here for a while,but i try to cactch up to see how your project is going. As for the parts,I believe there was a lot of work involved with this engine,but now at the end,you can be proud about what you have done ;) Hope you will solve all minor problems,and enjoy what you created with your bare hands :) |