Introduction: Knex V8 Engine

made this one awhile ago. this was my first attempt at making an engine out of knex(although its the revised version). its a 32 valve, dual overhead cam v8 with a roots type blower. this started out as a simple piston/block assembly for my engineering project in order to demonstrate torque/horsepower relationships. however, i kept adding on as i had plenty of pieces left over. turned out pretty cool.


KnexFreek (author)2011-08-09

This is AMAZING!!!!!!1!

jente105 (author)2011-02-05

hello i'm a dutchman, how build you the valves?
post the instructions.


KNEXFRANTIC (author)2010-02-08

that is AWSOME but what does john lenon have to do with an engine.

Yerboogieman (author)2009-11-30

Huh? You should see me now.

viper2788 (author)Yerboogieman2009-12-02

i'd rather not, im sure. thanks.

Yerboogieman (author)2009-10-06

It would be WAY Better if it was a Rotary engine.

viper2788 (author)Yerboogieman2009-11-12

doubt it. it would have less moving parts.

Yerboogieman (author)viper27882009-11-12

It would still be way cooler, i think you just can't do it. And you'd be the first to do it.

Sun Gear (author)2009-01-22

i made a 4 cylinder engine. the valves do open on time all the time with the cylinders. have yet to post because im adding some very cool "extras". i think the valves dont open on time with the cylinders on this video from what i can tell.

Yerboogieman (author)Sun Gear2009-10-06

Inline 4 or V4?

Sun Gear (author)Yerboogieman2009-11-09

inline i posted a vid

viper2788 (author)Sun Gear2009-01-22

yea it doesnt. i had it set up originally but the chain broke off a few times and i didnt bother to set the timing again. even so, i was forced to make a 2 stroke instead of a 4 due to the lack of gear ratios knex offers. i believe you can make a proper 4 stroke using some gray wheels and rubber bands... but it was out of my scale. well, i'll look forward to you post!

Sun Gear (author)viper27882009-01-22

ya i know what you mean. i had the same problem be fore. and i didnt know it was a two stroke. good luck.

Lowney (author)2009-06-29

Any chance of posting? Also what is the song used?

Shaznazabbadaz (author)Lowney2009-10-30

the song is Clubbed to Death by Rob Dougan

Lowney (author)Shaznazabbadaz2009-10-30

 K thanks        : )

stinger0410 (author)2009-08-27

hay when r u gonna post the turbo cause i've tried to make one but i keep failing

AnarchistAsian (author)2009-06-20

wow, this is the single knex model that is actually respectable...

knexfreak95 (author)2009-06-19

your crankshaft broke at 0:56 lol

knektek (author)2009-05-29

this is a great motor ! but, the output (the place where the car will be powered) you could replace the red cogs with something smaller, mayby?

lukeg36c (author)2009-04-09

post the instructions plzzzzzzzz it looks like an drag engine plzz post 5 stars

Bugman9 (author)2009-03-22

Thats fu***n awsome!

heat-seeker (author)2009-01-25

no one on this site makes a engine with a chanable gearbox!

knexfreak95 (author)heat-seeker2009-02-15


killjoy (author)heat-seeker2009-01-25

Thats because it connects to the engine and makes it look weird. So instead of whining build your own gearbox there are a couple posted here and on youtube.

heat-seeker (author)killjoy2009-01-25

i have,with a engine to power it

I_am_Canadian (author)2009-01-22

Very, very nice! You should post instructions.

Der Bradly (author)2009-01-22


shadowninja31 (author)2009-01-22


pls (author)2009-01-21

Wow, amazing.. Nice job!

knexfan9182 (author)2009-01-21

Yeah I've seen this video about 4-7 times but five stars. :)

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More by viper2788:project 2AZ-FE (sneak peek video)knex v8 engineproject 2AZ-FE (knex inline 4 engine)
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