IDP wrote:
Brad. I'd agree with what you say but.
I work in Superbikes and those small details are very important.
Longer bellmouths will increase the midrange but the top end will suffer. it's all a matter of balance.
if going from 105 inlet to 110 inlet, peak torque will drop and occur at higher rpm.
I realise this thread is about Nitrous and maybe this level of detail is not relative but, the point I was trying to get across mainly was how much more influence the Inlet timing made compared to the exhaust.
Also most variable valve timing systems work on the inlet side only which would support that.
I also realise the exhaust may very well be more important with Nitrous.
Perhaps we have got a little off topic.
Hoping my input will help us all, I'm just as interested in how Nitrous works even though we can't race with it.
Regards
Ian
I thought last night after I posted that I may need to quantify my statement.The tuning on the Busa is far easier and maybe could be seen as basic than someone like you who are building a swiss watch in comparison.The bikes race in either top speed or drag racing and cost can be big issue.The basic levels normally go Akro PC3 equals 200mph aspirated good enough to win a meeting.Drag racing its still poss to win a meeting but gas is a £500-600 set up and goes 8's and will win a meeting in 8.80 possibly.
Road warriors will go pipe and pc3 possibly with bellmouth mods depending on if they want high end power to tell the blokes down the pub about or if they like mid range grunt,short or long.
The aspirated swiss watch tuning is rare because there no a race class that its needed in to be 'only' aspirated and the expense is huge when compared to the others fore example.
Full house motor different cams dialed,port and flowed head,big bore kit,pipe pc3,airbox mods etc etc will rush you a cool £2500 to £3000.
For power that the £500-600 nitrous kit can give,in fact you'd have to put a stroker crank(another £3k) in to match the nitrous stuff.
At £3000 you're £500 away from a small but upgradable turbo kit with 280bhp potential on stock pistons!!
So not much work is done on the aspirated tuning stuff, it still occurs but if you want Busa power adders theres far better more economic ways of getting power.