Engines with odd number cylinders - Page 3

*CamaroSpike23* · 08-11-2008, 05:59 PM

Quote:

Originally Posted by Beelzebubba

Honda built a lot of weird V configured engines in the '80's.

V2s, V3s, V4s, V5s, V7s...etc...

They had an oval pistoned 32 valve, 8 sparkplug, V-4.

Their V-3s were very successful in Moto-GP.

And the next VFR is supposed to be a V-5
http://www.motorcyclenews.com/upload...ug-6-front.jpg

one thing to keep in mind tho is these are motorcycle motors. a lot less rotating mass to fight when making a motor. i had to explain to a guy who is used to bikes reving to 15000 rpms that you cant spin a v-8 to that unless its built for it. smaller motor= smaller rotating mass, easier to spin, easier to balance.

Navy Blue · 08-11-2008, 10:55 PM

i got a idea for you pal, build a 3 cylinder, have 2 small ones on 1 side and 1 big on on the other side to properly balance!....yea!..if you do and one day get rich hire me! i'm full of ideas!

Beelzebubba · 08-12-2008, 09:36 AM

Quote:

Originally Posted by CamaroSpike23

or i could take a power inverter and plug it into my cigarette lighter to power my electric leaf blower to my intake.
the problem with e-chargers is that, yes in 1 instance there is a significant increase. but how much of an increase was it? 10%? 20%? 30%? 40%?

...
not going to happen.

That's what I'm saying.

It was about a 30% increase but again it came at the cost of having to carry around a rack of deep cycle batteries.

So you get a power increase which is negated immediately by the extra weight necessary to create it.

Simplified Law of Thermodynamics:
1) You can't get something for nothing.
2) You can't win.
3) You have to lose.

One day when I was vacuuming out my car I saw the WOT switch for my nitrous oxide system. I made me think of running avariable resistor on the pedal to operate a separate electric motor with a cogged belt straight to a pulley on the front of the crankshaft. Maybe a quick OBD hack to read the TPS. Get it to power on when the throttle goes open after being closed and when it goes WOT and then regenerate at closed throttle.

Homebuilt hybrid!

I'm going to be rich! Right?!

Not so much.

I was informed that that's pretty much how Saturn's hybrid works

*Mr. Wyndham* · 08-12-2008, 11:16 AM

Quote:

Originally Posted by Beelzebubba

Homebuilt hybrid!

I'm going to be rich! Right?!

Not so much.

I was informed that that's pretty much how Saturn's hybrid works

*CamaroSpike23* · 11-10-2009, 12:36 PM

bump...

Xanthos · 11-10-2009, 01:06 PM

Man this is an old thread...

Maybe if you did an inline engine with the large cylinder in the middle, flanked by two smaller cylinders on either side?

That might help the balance issues... wouldn't fix the drivability though.
- X

*CamaroSpike23* · 11-11-2009, 07:22 AM

Quote:

Originally Posted by Xanthos

Man this is an old thread...

Maybe if you did an inline engine with the large cylinder in the middle, flanked by two smaller cylinders on either side?

That might help the balance issues... wouldn't fix the drivability though.
- X

inline 5 with the big one in the middle?

Xanthos · 11-11-2009, 08:41 AM

Quote:

Originally Posted by CamaroSpike23

inline 5 with the big one in the middle?

Yeah.
- X

Scrapppy666 · 11-11-2009, 10:05 AM

haha, why did this get dug back up?? Threads must be getting boring around here or something??

Xanthos · 11-11-2009, 10:12 AM

Quote:

Originally Posted by Scrapppy666

haha, why did this get dug back up?? Threads must be getting boring around here or something??

Spike's the one who bumped it.
- X

FenwickHockey65 · 11-11-2009, 10:24 AM

GM does a straight-5 in the GMT-355s...

Xanthos · 11-11-2009, 10:25 AM

Quote:

Originally Posted by FenwickHockey65

GM does a straight-5 in the GMT-355s...

Its not a straight-5 thats the topic of discussion...

Its a straight 5 that has four cylinders of one size and then a 5th thats larger.
- X

jrboyd_1980 · 11-11-2009, 10:28 AM

Quote:

Originally Posted by Muscle Master

Hmm..... I had a dream last night, it was a X-ray view of a 4 banger but it was odd, I notice there was another cylinder and it was a little bigger than the other 4

Maybe this is a sign that I should build an engine like this

Is it possible to build an ( example of what I am talking about) 5 cylinder engine, but have a the 5th cylinder larger than the other 4 and it is only activated when the engine needs more power, kind of like AFM but....not

And here another question, how come automakers don't use cylinders with an odd number, like V3, V7, V9, V11, etc

You would need to have them be inline and not the V design otherwise you would have a vibration problem.

*CamaroSpike23* · 11-11-2009, 11:34 AM

Quote:

Originally Posted by Scrapppy666

haha, why did this get dug back up?? Threads must be getting boring around here or something??

cus I missed this topic...

Quote:

Originally Posted by Xanthos

Spike's the one who bumped it.
- X

Quote:

Originally Posted by Xanthos

Its not a straight-5 thats the topic of discussion...

Its a straight 5 that has four cylinders of one size and then a 5th thats larger.
- X

it doesnt even have to be a 5cyl. a 2 cyl, or a 3,4,5,6,7,8,9 whatever cyl... with a setup with certain cyl(s) larger than the others.

Quote:

Originally Posted by jrboyd_1980

You would need to have them be inline and not the V design otherwise you would have a vibration problem.

unless you did a dual large setup with one on either side to offset the balance

11-10-2009, 01:06 PM	#34
Xanthos PWA Relapse Drives: Formerly-Stick Join Date: Mar 2008 Location: Oklahoma Posts: 12,588 View My Garage	Man this is an old thread... Maybe if you did an inline engine with the large cylinder in the middle, flanked by two smaller cylinders on either side? That might help the balance issues... wouldn't fix the drivability though. - X __________________ 2017 1LT/RS A8 Hyper Blue Metallic

11-11-2009, 10:05 AM	#37
Scrapppy666 Drives: 2010 2SS/RS M6 Black/Black Join Date: Apr 2009 Location: Pittsburgh, PA Posts: 1,281 View My Garage	haha, why did this get dug back up?? Threads must be getting boring around here or something?? __________________ Pittsburgh Automotive Photography Black on Black 2SS/RS w/ white stripes Dynomax 3" Bullet Catback, CAI Cold Air Intake

11-11-2009, 10:24 AM	#39
FenwickHockey65 General Motors Aficionado Drives: 2023 GMC Canyon, 2023 Expedition Join Date: Aug 2008 Location: Florida Posts: 37,375 View My Garage	GM does a straight-5 in the GMT-355s... __________________ 2023 GMC Canyon Elevation 2023 Ford Expedition SSV (State-Issued)

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08-11-2008, 10:55 PM	#30
Navy Blue Future Camaro Owner Drives: 2001 Chevy Impala Join Date: Aug 2007 Location: Whiting IN Posts: 258	i got a idea for you pal, build a 3 cylinder, have 2 small ones on 1 side and 1 big on on the other side to properly balance!....yea!..if you do and one day get rich hire me! i'm full of ideas!