3t-gteketo Posted October 6, 2009 Report Share Posted October 6, 2009 hi all i have a old 3k motor and I'm wondering what i will need to do to put the 3k head onto a 4k motor. i heard it goes allright just wondering what to do. is it as simple as just bolting the 3k head to a 4k or is their more involved any help would be great cheers :) Quote Link to comment Share on other sites More sharing options...
Taz_Rx Posted October 6, 2009 Report Share Posted October 6, 2009 (edited) Yes it is that simple. ;) I would recommend facing the head first though for peice of mind. And while we're on recommendations there's a search function tab in the top right corner. :) Oh and you need to use the 4k pushrods as the 3k ones will pull up about 20mm too short. Don't expect too much if thats the only mod you're doing though. ;) Edited October 6, 2009 by Taz_Rx Quote Link to comment Share on other sites More sharing options...
3t-gteketo Posted October 6, 2009 Author Report Share Posted October 6, 2009 cheers for that information. what else can i do to get a bit more power out of it. even know it is a 4k Quote Link to comment Share on other sites More sharing options...
Taz_Rx Posted October 6, 2009 Report Share Posted October 6, 2009 Have a trawl through this section...... http://www.rollaclub.com/board/?showforum=67 More K specific info there than you can point a stick at. :) Quote Link to comment Share on other sites More sharing options...
kiahn Posted October 6, 2009 Report Share Posted October 6, 2009 also why the hell would you wanna put an older head on when you need to battle with the corrosion and all the other general wear, just get your 4k head machined down .020 or .040" and it will have the exact same effect, while your at it you might as well take a little while to get your ports opened up a little more. that will increase flow and make your compression a descent amount higher and yeh search button helps ALOT and also reading the FAQ Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted October 6, 2009 Report Share Posted October 6, 2009 ..and a good cam and extractors leading into a bigger exhaust and twin carbs and ....... How big did you say your wallet was??... :D Quote Link to comment Share on other sites More sharing options...
Evan G Posted October 6, 2009 Report Share Posted October 6, 2009 ..and a good cam and extractors leading into a bigger exhaust and twin carbs and ....... How big did you say your wallet was??... :D about 4age big :party: Quote Link to comment Share on other sites More sharing options...
philbey Posted October 7, 2009 Report Share Posted October 7, 2009 Pffft 4age. My head got skimmed and the ports matched to my dellorto manifold for 150. Quote Link to comment Share on other sites More sharing options...
anastasios Posted October 7, 2009 Report Share Posted October 7, 2009 damn thats a good price! Quote Link to comment Share on other sites More sharing options...
Felix Posted October 7, 2009 Report Share Posted October 7, 2009 Pffft 4age. In a ke1x where you want to keep it originalish and save a lot of stuffing around I'd agree with you. Fact is that a ke30-70 is about 20-25% heavier. If you are capable of doing a conversion yourself, money would be better spent on a 4age. (dependent if you fall under P-plater laws). By the time you build a decent NA K series, add twins, regraphed dizzy, tuning etc. You could quite easily sink 2-3 grand into one. In something like a ke70 a stock 4age would go just as hard and have more potential down the track. Quote Link to comment Share on other sites More sharing options...
kiahn Posted October 7, 2009 Report Share Posted October 7, 2009 agreed felix, thats EXACTLY what convinced me to go 4age but k series motors have something about them that makes some people want to keep them if you get head skimmed on your 4k it will up the compression and it would go lovely with a nice 272 cam regrind and a weber :D also while your getting your head skimmed you should see if you can get your flywheel lightened and balanced depending on how much you money you have here is a video of a 4k with a bit of work Quote Link to comment Share on other sites More sharing options...
philbey Posted October 8, 2009 Report Share Posted October 8, 2009 Yeh I know. I'd like to run a 4AG in a KE10 for laughs anyway. anastatios, now that I think of it that price is probably the old "mate of a mate" price, although I didn't really think about it at the time. Quote Link to comment Share on other sites More sharing options...
Evan G Posted October 9, 2009 Report Share Posted October 9, 2009 agreed felix, thats EXACTLY what convinced me to go 4age but k series motors have something about them that makes some people want to keep them if you get head skimmed on your 4k it will up the compression and it would go lovely with a nice 272 cam regrind and a weber :P also while your getting your head skimmed you should see if you can get your flywheel lightened and balanced depending on how much you money you have here is a video of a 4k with a bit of work can you pleaseeee take a video of it going around the block, sounds sickkk Quote Link to comment Share on other sites More sharing options...
Reggie_ghee Posted April 7, 2014 Report Share Posted April 7, 2014 I'm looking into a N/A 4k build, hoping I could score a not so only and worn 3khead, but wasent sure how to go about the block? and suggestions? want her touch, but free to rpm? Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted April 7, 2014 Report Share Posted April 7, 2014 Same question Reggie, how much money have you got? You can easily sink $4000 into a 4K if you want it fast and reliable. You can make a nice, easy-to-drive, under-the-cop's-radar 4K that keeps up with the traffic easily enough. What's the car going to be used for? What experience do you ahve in modifying motors? How much work can you do and how much will you have to pay for? Read this topic & start a new thread with all the questions- http://www.rollaclub.com/board/topic/64432-how-to-tackle-that-engine-conversion/ ..and take a look at what I did on my daughter's- http://www.rollaclub.com/board/topic/42407-the-girls-ke70/ Quote Link to comment Share on other sites More sharing options...
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