jarjardude Posted December 20, 2016 Share Posted December 20, 2016 (edited) hey all, i've mad the choice to go for a hyper 7 to get into the world of nitro rc. the problem is there are 2 versions that i can find at this moment, the tq2 .28 model or the tq2 .21 savox. (link below) and i have no idea what the difference is between them. is the .28 version worth the extra £20? Links: .28 version:http://www.wheelspinmodels.co.uk/i/264621/ .21 version:http://www.wheelspinmodels.co.uk/i/264622/ Edited December 20, 2016 by jarjardude Quote Link to comment Share on other sites More sharing options...
Baja 5b Posted December 20, 2016 Share Posted December 20, 2016 I think the .28 model is available for £249 from modelsport U.K. I've not owned a Hobao engine so can't comment on which is best. Quote Link to comment Share on other sites More sharing options...
evssv Posted December 20, 2016 Share Posted December 20, 2016 (edited) Ideally the .21 3 port..is the better engine Edited December 20, 2016 by evssv Quote Link to comment Share on other sites More sharing options...
J.K Posted December 20, 2016 Share Posted December 20, 2016 I agree, the .21 is sweet as a nut. Eligible to race too if it ever takes your fancy The .28 has more grunt (torque) but uses more fuel and puts greater stress on the drivetrain. I found the .21 holds a tune better than the .28 and is also easier to tune in the first place. 1 Quote Link to comment Share on other sites More sharing options...
jarjardude Posted December 20, 2016 Author Share Posted December 20, 2016 26 minutes ago, James1986 said: I agree, the .21 is sweet as a nut. Eligible to race too if it ever takes your fancy The .28 has more grunt (torque) but uses more fuel and puts greater stress on the drivetrain. I found the .21 holds a tune better than the .28 and is also easier to tune in the first place. nice, thanks, hoping to pick it up after the new year for a deal (I hope !) thanks Quote Link to comment Share on other sites More sharing options...
locky Posted December 20, 2016 Share Posted December 20, 2016 I found my Hyper 7 runs better (subjective) with HPI K4.6 28 engine than the 3 port 21 engine. Faster (subjective) and better acceleration (subjective). Not noticed any difference in wear yet and dont think it will be a big issue, as run a brushless Hyper 7 which has tons more torque. I you do a search this has been asked a few times and you will get differing answers. IMO you will get better acceleration with the 28 and possibly the same top speed. Manufacturers rpm figures are not usually accurate, so treat as a guide. The art is of course to tune it well. The 28 will need refueling more often. A decent branded 21 engine will be much better than the RTR supplied version but it all depends what you want from it. You could of course get a roller a put your own engine, but if your starting out then best buy new to learn.. Quote Link to comment Share on other sites More sharing options...
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