16hp Briggs

[ZShanley]

So i am new to this stuff. i am currently attending SUNY Oswego and i am in a transportation class where we r rebuilding engines. I have a 16 hp Briggs opposed twin cylinder 656cc. I dont have any pics of it on my computer yet but it currently isnt working and was wondering how it would fair on a go kart after the rebuild.

Thanks,
Zach

[Rotore]

Pretty good dude I have a 725cc 25hp kohler building up that's serious power for a gokart

[BriggsTwins]

twins for karts work good, i have an 18, and freak has a 20, and now you two with ur twins

[freakboy]

We got our own twin gang goin on dont forget ray has that 18 on his bike of badness!

[Kaptain Krunch]

I got an 18 twin that should be going in my racing mower in progress at some point, and a horizontal 16 twin in my riding mower that i use to grass board and whatnot.

Oh and my kart has a 400cc inline twin engine, 36hp stock.

[1992suburban]

I had a vanguard 18.. didnt care for it maybe mine needed WORK

my 6.5 clone would run a circle around it..

[Rotore]

One of are twins are looking to get turbocharged soon

[modelengineer]

I'm also running a parallel twin (500cc, 47hp). The sound is awesome!

[BriggsTwins]

nice, the twin gang is growing......

[ZShanley]

well this is good news to my ears. my build probably isnt going to start till the summer unfortunately. i am gonna have to find a frame cause i dont know how to weld so that is next on my list of things to do

[Rotore]

We should make a performance guide for our bigger engines; What do you guys think?

[freakboy]

Sure we could.

[Rotore]

could be useful for us?

[BriggsTwins]

definetly,
twins are tough engines,

[Rotore]

where should we start?

[freakboy]

I could do something about them like pros and cons. then we can add to the thread. Ill have to do it tonight cause im on my lunch break here and i gotta get back to work soon.

[BriggsTwins]

lets start with RPM limits!!!!

4000 is the TOP!
they could use better valve springs
internals are strong as is,
watch your head gaskets as they tend to blow under heavy load/age
they are strong and even governed at 3200 kill anything else.
keep the tin and shrouding on it to keep the block cool
they love to run, but with one goofed spark plug it will run like hell
carb adjustments are key! one carb feeding to jugs is sensetive, running lean can be risky


*Next*

[Rotore]

lets start with RPM limits!!!!

4000 is the TOP!
they could use better valve springs
internals are strong as is,
watch your head gaskets as they tend to blow under heavy load/age
they are strong and even governed at 3200 kill anything else.
keep the tin and shrouding on it to keep the block cool
they love to run, but with one goofed spark plug it will run like hell
carb adjustments are key! one carb feeding to jugs is sensetive, running lean can be risky


*Next*

lol awsome i'll look up a couple things on hey mow and some other sites for it! :wai::cheers2:

Quick question though lol can my 25hp push a 4:1 gear ratio on a 15 inch tire

[BriggsTwins]

i think so, id have to do math and my brain dont work right now

[modelengineer]

lets start with RPM limits!!!!

4000 is the TOP!

11,000 rpm for this twin :P apparently with stronger valve springs you can get it to 13k rpm, but power drops off after about 9,500 so I don't see the point. Also my tacho only goes to 10,000...

[Rotore]

i think so, id have to do math and my brain dont work right now

kool thanks dude

[BriggsTwins]

well your missing 2 strokes in ur engine sooooo, rpm vs torque! either is ok!

[Kaptain Krunch]

Yup my twin will do around 10k when tuned right (horrible carbs right now), and the tach goes to 11k. Makes peak power at 8.5k and will spin the tires right off.

[BriggsTwins]

what is the bore on your engine

[modelengineer]

Bore 74mm, stroke 56.6mm. 9.0:1 compression (don't know if that was directed at me, but I felt like looking it up anyway. It's way over square.)

Interested to hear what yours is Kaptain. Internet high five for motorbike twins!?
*high five*

[BriggsTwins]

oh either, 2.913 inches is actually small, but powerful at 8.5K
my 18 twin is 3.5xx inches, with more displacement than my dad''s bike

[BriggsTwins]

..... im confused....
how did that get on my post

[modelengineer]

... I dont know, it looks like what Kaptain would have typed...

[BriggsTwins]

my brain hurts

I have an 18 twin, my dads bike is a cx500 did i lose it somewhere

[Kaptain Krunch]

Sorry i clicked edit instead of quote and wasnt paying attention :oops:

Put it back to normal, Sorry.

So anyways, high five Model!

Mines got

64mm bore
62mm stroke
9.5:1 compression ratio
36hp@8.5k

[BriggsTwins]

its ok!!! but anyway.... twin cylinder discussion
GO!

[modelengineer]

Post pics of your twin!

[BriggsTwins]

http://www.youtube.com/watch?v=X4gER3ZOeIM


where did you find your twins?

[modelengineer]

Liberated from this motorbike

http://i231.photobucket.com/albums/ee224/jones_pbkt/Sidewinder/BikePic.jpg

http://i231.photobucket.com/albums/ee224/jones_pbkt/Sidewinder/NakedEngine1.jpg

http://i231.photobucket.com/albums/ee224/jones_pbkt/Sidewinder/1912083.jpg

[BriggsTwins]

lol the front end is like "ow"

[Kaptain Krunch]

Craigslist, $40 for the whole bike, needed a coil and a good carb cleaning. http://www.diygokarts.com/vb/showthread.php?p=70107#post70107

[BriggsTwins]

oldy but a goodie there kap

[Rotore]

My 725cc 25hp Kohler commando

[BriggsTwins]

ooooooo kohler check this out

http://www.youtube.com/watch?v=sQIMSGqXfig


they have a hell of a cam in there

[Rotore]

ooooooo kohler check this out

http://www.youtube.com/watch?v=sQIMSGqXfig


they have a hell of a cam in there

lol thats sick dude.

YOOOOOO i found a way to hook up a automotive tach to our engines on heymow.

,The tach should have 4 wires. Red, Black, White, and Green. Red goes to POS. Black to ground, White to a light switch. Green to the coil wire."

[BriggsTwins]

yes but the issue stands, 4 cylinder, to two, if i had one i would experiment using a resistor, or something to slow the signal and make it work

[Rotore]

it"ll work its just that the readings would be wrong the tach would say 9000rpm when your only at 3600rpm. Btw there was a guy on youtube that made it work ill se if i can find it.

also that chooper was using a torque converter off a sled on my same exact engine too.

[BriggsTwins]

i have a 4500 rpm mechanical tach, but still havent figured how to hook the booger up

[Rotore]

heres a vid i found on youtube http://www.youtube.com/watch?v=uxYAjFtMkWs

[Rotore]

i have a 4500 rpm mechanical tach, but still havent figured how to hook the booger up

does it have ignition points or is it electronic?

[freakboy]

Buetiful thread jack you guys!

[Rotore]

lol sorry we should start our own then i guess

[modelengineer]

Well on a twin bike engine, a 4 cylinder car tacho will read perfectly from what I've heard. I'll be able to confirm in a few weeks.

[Rotore]

nice dude post piks and a video if you can

[freakboy]

There you guys go post in my new thread i made. Its all about TWINS lol now we have a place to talk about it.