JCSO605 Posted November 14, 2013 Report Share Posted November 14, 2013 Hey guys I'm wanting to build another bike just about have one complete. It's fitted with a 10mil cub built by D&M Racing. I bought the engine from buckeyeshee here and he is a good one to do business with. My deal is I'm torn between going with a 14mil cub or 4 mil DM. This will be an 1/8 mile bike. It will also be ran on race fuel not alky. I will go with a&s, d&m, or k&t for the setup. Which would be best Thanks Quote Link to comment Share on other sites More sharing options...
Gotmils? Posted November 14, 2013 Report Share Posted November 14, 2013 I was in the same boat man I sold my 4mil dm because I couldn't get any races so now I'm building a super wampus..in the grudge 1/8 world you will get more action with the cub vs the dm just from my experience Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 14, 2013 Author Report Share Posted November 14, 2013 Thanks for that info. I'm wanting to know also the power difference if any and want setup is easier on the wallet. Quote Link to comment Share on other sites More sharing options...
camatv Posted November 14, 2013 Report Share Posted November 14, 2013 thats easy compare cost of a 14 billet crank to a 4 mill forged.... Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 14, 2013 Author Report Share Posted November 14, 2013 But the extensive case work for the dm. What about cost for case work for a 14mil? Just trying to figure out which one will get me more bang for my buck. Quote Link to comment Share on other sites More sharing options...
Gotmils? Posted November 14, 2013 Report Share Posted November 14, 2013 I think you might come out cheaper with the 4 dm case work ,but as far as hp goes its all in how fast you want to go and other things like weight,tuning etc.. don't get to big in the whole hp thing ,because there stock cylinders out there running 6.20s and faster Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 14, 2013 Author Report Share Posted November 14, 2013 Thanks for the info guys Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted November 14, 2013 Report Share Posted November 14, 2013 I vote 10 DM. You already have cases trenched for a 10 and you may have a good billet crank for the 10 as well. Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 14, 2013 Author Report Share Posted November 14, 2013 Your right Quote Link to comment Share on other sites More sharing options...
registered user Posted November 15, 2013 Report Share Posted November 15, 2013 (edited) so both would be close to 500cc if im thinking right. 68x68 on the cub and 72x58 on the dm ? sqaure engines usually have the advantage with more port area assuming both are close to the same cubic capacity and similar port design. over sqaure is never a good idea if you can avoid it especially if its extremely over sqaure. 72x58 would be extreme imo but you have to remember if the cub is originally cast as 64mmbore and you take it to 68 what is that gonna do to the trans and exh tunnels likewise with 72. when you push the bore that far into the tunnels is not a ideal situation Edited November 15, 2013 by registered user Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 15, 2013 Author Report Share Posted November 15, 2013 Maybe I ought to just build a second 10 mil cub :/ Quote Link to comment Share on other sites More sharing options...
m671054 Posted November 15, 2013 Report Share Posted November 15, 2013 Thought dm are all 77-78bore. also transfer tunnel layout is different to help accomodate bore size. also wouldnt be concerned about bore size on a cub cylinder.64-68 no difference. You builder will do fine with either. also thought you wanted to build another bike meaning 2total. dont reuse what you have. I have a 14 cub that runs good. i think i would do a short stroke big bore when i do it again. like a 4 dmx maybe Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 15, 2013 Author Report Share Posted November 15, 2013 I do want two just finished a 10 mil cub bike now I'm wanting to build something a little different I just wanted to know if there was any difference in power between the 14 mil cub and the 4 mil dm. Also the one that made the best power for the money. 4 mil DMX. THAT IS A BEAST Quote Link to comment Share on other sites More sharing options...
registered user Posted November 16, 2013 Report Share Posted November 16, 2013 (edited) Thought dm are all 77-78bore. also transfer tunnel layout is different to help accomodate bore size. also wouldnt be concerned about bore size on a cub cylinder.64-68 no difference. You builder will do fine with either. also thought you wanted to build another bike meaning 2total. dont reuse what you have. I have a 14 cub that runs good. i think i would do a short stroke big bore when i do it again. like a 4 dmx maybe large bore short stroke is not the best idea on a 2t. any builder worth a grain of salt will tell you this. on a twin with cylinders close together the trans tunnels dont have the best of geometry to begin with. increasing the bore only adds to the problem. when they go almost straight up and make a 90* turn thats a poor performing duct small bore cub close to sqaure with as long a rod as possible is likely to have the most power per cc. Edited November 16, 2013 by registered user Quote Link to comment Share on other sites More sharing options...
JCSO605 Posted November 16, 2013 Author Report Share Posted November 16, 2013 Thanks guys I think I'm gonna go with another 10mil cub. Can't go wrong with them for the power for price. Who would y'all refer me to for a drag ported cub? The one I got now was done by d&m racing Quote Link to comment Share on other sites More sharing options...
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