I don’t understand, “a bit much”, in what way? By “blubbery”, do you mean rich? And if it does mean rich, why couldn’t you just adjust the the needles? And when you say, “that track”, in what way is that track any different from other tracks?
Comments compliments criticisms and questions always welcome.
If the data does not support the theory, get a new theory.
Mike IMHO - I disagree with a 5hp gain or even less than 25% of that gain. Set that mild engine up with a 24mm brioni/ibea/triton/hubchen/tilly 360a on gas or modified alky on a tight track or possibly a messaged walboro 1.050 w3ba on a wot oval or if the engine has a little port work & ehaust port timing & some cut pistons & 9cc combustion chamber & a little case porting U might want try a atomized ibea/ 29mm carbe a atomized 380 modified. I believe u'll find the Q 98 to work just fine with a stock to super stock or even mild open gas or alky late triple port design 100cc reed/rotary & quite possibly same same for up to 116 cc - JMHO
That's OK. Just telling you what Hilton's engine did on Kermit ' dyno. Maybe I'm wrong. Ask Hilton.
Mike
IMHO - KB 06/Q98/KB01/KB02/KBDOM/original noise banned KBDY?? or RLV Pro80 or 81/82 or S3/S4/G2 & original RLV noise banned pipe w/o label (just weld a good muffler section on them - but more to come on that forthcoming later) on alky or gas I get approx 10% more hp by switching alky vs gas carbe regardless of the pipe on the same engine nothwithstanding flex & other such adjustments. The factor surely seems to be the fuel & not the pipe. I've heard all the arguments on sound waves in the pipe depending on the fuel type & alky pipes vs gas. IMHO a good pipe is a good pipe for the situation regardless of fuel type. Not withstanding the out of the corner alky bog. I just happen to favor all those pipes I mentioned above JMHO
I ran the q98 on a 116 PCR with a mikuni 34 on alky and loved it. Although it did take a lot of pop off and fulcrum arm height tuning.
That info is something I've always wanted to know. If there is any difference with pipe designs for alky or gas it seems the differences are fairly small. Definitely not enough difference for me to be worried about when running our mandatory gas fuel. I mean I assume we are talking same compression and head designs and measuring the difference in engine performance with just a change over from gas to alky carbs perhaps with a small ignition adjustment.
Arc - FYI - Just remember one significant difference in alky vs gas is with alky ur probably going to run .010 Before TDC more timing advance than u will with petrol (gas) for example -- .090 BTDC on petrol & .100 BTDC on alky. If u plan far enough in advance u could run a 12.5cc combustion chamber volume (lower compression) and perhaps another .005 (maybe go from .005 ---> .0055 clearance) & bump the timing on alky to .110 BTDC if u need to set the engine on "KILL" to beat the top 5 in the country. This is notwithstanding there's nothing left to get out of your kart & physical self and your handling , tires, grip, chassis setup, brakes, are dead nuts ON. It may come down to plenty of water & juiced veggies & not eating solid food & a triple dose of metamusal 48 hours before race time. Hey whatever it takes to be a champion. Oh my.....LOL
IMHO - that sounds like a great setup for a stock ported 115 albeit with one mod I'd drop the 34mm down to a billet cup atomized 29mm alky. if it were a real upper middle to full tilt open ported 115 with 11.5 cc combustion chambers (some pretty good compression with that size piston) I'd bump up to a KB01 or RLV Pro 80 (maybe modified with a 2nd exit hole depending) & go with a billet cup atomized 34mm and a very high slip to get it on the pipe out of the corners with that carbe. - JMHO
I can only guess of course, but it sounds like you can't answer the questions. I can only go by what I hear, but I hear there are over 5,000,000 comedians who have stopped looking for work.Nunley - " I really don't understand "
Nunley - " And nobody can convince me otherwise. "
Well... Al ....
BANG !! U hit it right out of the park. ;p
IMHO -
What can I say u said it best urself.... And who am I to argue otherwise ? - JMHO ;p
Damn this forum is pure classic
That is interesting. I was never really happy with the KB01's power band width or its over wind capabilities. I was always happier with a Pro 81/2 or a KB06. I always needed dual carbs on them due to cooling issues on the air cooled engines. Now, if you ran it at a track where you breathe the engine a whole bunch a single is fine but if you can really stay on the fuel to the point where you are lifting for just a second or two, I just never had luck with a single carb.IMHO - that sounds like a great setup for a stock ported 115 albeit with one mod I'd drop the 34mm down to a billet cup atomized 29mm alky. if it were a real upper middle to full tilt open ported 115 with 11.5 cc combustion chambers (some pretty good compression with that size piston) I'd bump up to a KB01 or RLV Pro 80 (maybe modified with a 2nd exit hole depending) & go with a billet cup atomized 34mm and a very high slip to get it on the pipe out of the corners with that carbe. - JMHO