veilside z Posted January 8, 2016 Share Posted January 8, 2016 http://www.superstreetonline.com/how-to/engine/modp-1303-nissan-350z-vq35de-engine-build/?sm_id=social_aumosuperstreetonlinesshub_default_20160106_57000366&adbid=10156351902590058&adbpl=fb&adbpr=119562450057 Quote Link to comment Share on other sites More sharing options...
The Bounty Bar Kid Posted January 8, 2016 Share Posted January 8, 2016 Someone put it up yesterday. Quote Link to comment Share on other sites More sharing options...
jjdugen Posted January 8, 2016 Share Posted January 8, 2016 100 BHP per litre? What is it about car engines? I have an old 1996 918 cc Fireblade that makes 130 REAR wheel BHP. (and that on carburetors). Normally aspirated, ticks over smoothly, etc. And its not a short life but happy one either, this oldy has nearly 60,000 miles up with only one valve shim changed. The latest litre bikes are pushing 200 BHP.. and are quite happy running around road or track and are Euro 4 compliant. I can appreciate that cars have to be tuned for torque as much as power if only to shift their body weight, but, surely, someone at Nissan must have looked at motorcycle engine design? 1 Quote Link to comment Share on other sites More sharing options...
veilside z Posted January 8, 2016 Author Share Posted January 8, 2016 Oh dear ... Only found it this morning. Quote Link to comment Share on other sites More sharing options...
Richf Posted January 8, 2016 Share Posted January 8, 2016 Bikes are making 200hp at the wheel largely because they have a much simpler and more efficient drive train, although I am surprised that normally aspirated bikes are up to 200hp at the wheel now, but ive been out of the picture for a while. Of course bike engines don't make the torque though my 180rwhp bike made less than 110ft lbs of torque , a 180hp car engine would probably make twice that and you wouldn't need to rev the nagers off it. Quote Link to comment Share on other sites More sharing options...
jjdugen Posted January 8, 2016 Share Posted January 8, 2016 Just a quick peruse of the figures. The 350z makes around 260 ft.lbs of torque (from 3.5 liters). Most of the 180 - 200 bhp motorcycles get from 90 - 110 ft.lbs torque. Multiply the capacities up and.... it would seem that motorcycle make the same amount of torque but stacks more BHP! I do admit that these (can, safely) rev through 11000 rpm, but, still, what the hell? (And this from just 4 cylinders BTW) These are normally aspirated, Kawasaki have released a SUPERCHARGED thou, the figures for that are getting on for being unbelievable! 1 Quote Link to comment Share on other sites More sharing options...
Richf Posted January 8, 2016 Share Posted January 8, 2016 Its not as easy as just multiplying the capacity up if only it were Quote Link to comment Share on other sites More sharing options...
docwra Posted January 8, 2016 Share Posted January 8, 2016 Bike engines have 18K rev limits and mad power skills due to short stroke engines, but this is to the detriment of low down torque which a big heavy car needs a lot more. Honda have been making reliable N/A 100hp/litre engines for ages, Im surprised more havent followed but imagine its going to be related to efficiency - high capacity to output ratio invariably means high rev limit as well. Quote Link to comment Share on other sites More sharing options...
Jetpilot Posted January 8, 2016 Share Posted January 8, 2016 If a 350z redline was 12k I bet that would make silly bhp, but you have identified the problem yourself, its a lot easier to get some lightweight 250cc pistons reving freely, but chuck in some pistons twice the size and your question is answered, its just physics. A mate had a cbr250 , 19k rpm. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.