Carbureted cb !!!!

1973cb750

Been there
Thread starter
found this on facebook a carb'd cb check this out power dubs this must be the limit of the head / small valves 122hp

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credit to this guy

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CB1100一直在復古車裡有著舉足輕重的地位 4缸的聲浪 復古的外型 在空冷的末世代 還保有90年代的CB家族的輪廓
但對於改裝市場來說 CB1100有著大量的限制 電子系統需要保有每個零件回傳信號 才能不被原廠電腦干涉功能
就算全原廠好了 電子限速也會將其限制在一個感覺這顆引擎還有很大實力發揮的時速
解了限速後 總覺得還是哪裡不夠好
受限於節流閥的迷你尺寸的緣故
CB1100真正的性能一直沒辦法被解開
這次異種移植了點火模組和化油器 經過馬力機精心調整後
我們看到了這顆引擎的潛力
120HP馬力和那持續10.5Kgm 的扭力平原
和以前那些大四缸前輩一樣
路試時的那種強大推進力的恐懼感 再次找回來了
謝謝車主的信任 這種奇特的企劃還是可以找我們玩
如果你還有更瘋狂的想法 歡迎找我們討論看看(?

CB1100 has always been a key player in vintage cars, 4-cylinder sound wave, retro look, air cold last generation, still the outline of the CB family from the 90s
But CB1100 has a lot of restrictions for the modification market. Electronic systems need to keep a signal back from each part in order not to interfere with the original computer.
Even if the original is done, the electronic speed limit will limit it to a speed that feels like the engine still has a lot of power
I still feel like it's not good enough after I get the speed limit.
Limited to the mini size of throttle
CB1100 true performance has never been solved
The ignition module and carburetor have been carefully adjusted by the horsepower
We see the potential of this engine
120HP horsepower and that torque plain that lasts 10.5Kgm
Same as those old big four-cylinder seniors
The fear of the powerful push from the road test is back again
Thanks for the trust of the owner, this strange project can still come to us to play
If you have any crazier ideas, please contact us to discuss them (?).
 
I'd like to see that on a Dynojet- scaled correctly (5252 crossover) and SAE correction factor....just for apples to apples of what common runs are.

Anybody notice his ign switch above the clutch?
 
PowerDubs_imp said:
I'd like to see that on a Dynojet- scaled correctly (5252 crossover) and SAE correction factor....just for apples to apples of what common runs are.

Anybody notice his ign switch above the clutch?
Thank for pointing that out, Dubs. There is so much to see, MAN, what a BIKE! Beautiful workmanship. Not my cup of tea, but so beautiful in every detail.
 
Thread starter
PowerDubs_imp said:
I'd like to see that on a Dynojet- scaled correctly (5252 crossover) and SAE correction factor....just for apples to apples of what common runs are.

Anybody notice his ign switch above the clutch?
yeah kinda cool
 
Such a cool setup. That's the kind of power that this bike should have came with from the factory IMO. And what I would expect from an 1100cc inline 4.

Love how the power curve isn't a curve and its just a steady incline the entire run, nice and smooth.


2014 CB1100, 1981 KZ440 LTD, 1993 Yamaha XJ600 Seca, 1994 Yamaha XJ600 Seca
 
The modern air-cooled CB1100 had to meet international emission standard(s) in order to be marketed viably. That might explain why lump performance is so modest.
 
GoldOxide_imp said:
The modern air-cooled CB1100 had to meet international emission standard(s) in order to be marketed viably. That might explain why lump performance is so modest.
I found it interesting to note the CB's compression ratio is 9.5:1 Vs 13.5:1 of the Aprilia Tuareg (660cc twin) I was riding a few weeks back. That is some difference. No doubt emission targets had a great role in that given the tolerances of an air-cooled engine.

Out of interest, some other four pots.:

12.2:1 for the Suzuki GSX-S1000GT
11.6:1 for the Honda CB1000R
11.8:1 for the Kawasaki Z1000SX
14:1 for the Ducati Panigale V4
 
I like the compression ratio on the CB1100. It really helped make burning regular octane fuel a zero thought process.

The power is there, albeit for a 1100 cc air-cooled lump.
 
Thread starter
some day im gona buy a spare head and port it and install some bigger valves i have a small mill i bet i can i have bult quite a few sets of cylinder heads for cmall and big block chevys and mopars
 
Is there anybody on the forum who knows what it takes to replace the CB1100's FI with carburetors ?
Does it involve
- changing the fuel pump ?
- the whole ignition system ?
- the ECU ...

Airbox and carbs is easy, but can the rest be done without sinking a lot of money with uncertain results ?
 
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