Era\'s quiz time !!!

[oldone]

Now all you clever boys and girls,all you tuners and vendors,all you big horsepower engine builders....you technical boffs,  :WaveBye

What is the smallest,workable bridge port motor,built for lil power and fuel economy,driveability etc...but sounds good   :xconfused

This is a REAL test for you lot out there cos over the few last weeks there has been some incredible bragging\\slagging on this forum.This is the oppurtunity for you to come forward with your tech skills.

Happy thinking ...hahaheheheh

ps.I have already built it..!

[Martiny]

Gotta be this one...

[kev-yorks]

Smallest bridge port i know of is on the 5cc model aircraft wankel engine.
Kevin

[Turbotez]

is it that small scale ferrari that bloke built all by him self??? will look for a picy!

[oldone]

The minitures are a subsection of this quiz,Im actually after answers which befits a life size motor,i.e.bridge sizes,degrees and angles etc   :3Confused

[asp]

edit\'d cos i didnt read the post in full :2Confused

cut the quiz short and tel us

[oldone]

With an avatar like yours it should be easy.........lets see ,is the bridge 5mm or less,do we cut the water seal ?

[Martiny]

Hey Oldone, what were you like to play with as a kid?

You make the rules, then we start the game, then as soon as I win - Oh, no, no, no the rules need changing suddenly now?

:-)

[oldone]

Now all you clever boys and girls,all you tuners and vendors,all you big horsepower engine builders....you technical boffs,  :WaveBye

What is the smallest,workable bridge port motor,built for lil power and fuel economy,driveability etc...but sounds good   :xconfused

The rules are as the above,\'smallest\' refers to the actual bridge or the port next to bridge,...ahem......

Hence the quote 5mm or...trying to encourage people who have built motors or have ideas to share cos i will post pics at some or other time..

[Glenn Butcher]

A \'holy\' bridgeport is quite a good thing, angle of 45 degrees, with the holes drilled around 4-5mm in diameter, around 1mm between each.

Also if you are running a nikki carb with the secondary\'s in place you can just bridge the secondaries and run a nice mild port on the primary\'s.  You still get a little bit of the overlap/brap brap sound - and it comes on pretty strong when the secondaries open.

But to be honest, why not go the whole hog like ASP\'s pic.

[Martiny]

Ah Ok, so "small" refers to the size of the BRIDGE, not the size of the Motor?

Actually I think my picture is of a Peripheral port motor anyway, so it doesnt count :-(

[oldone]

The fun is over......a lil one for the lil 12A,just want a lazy bridge as its a daily user and not a racer,motor is def not good for high horsepower (lil abused and tired),Nikki has been altered so primaries and secondaries will operate without vacuum,primary jets have been upped a size to compensate and secondaries are upped 2 sizes,all goods not needed stripped off and binned.(flames are happening)
The specs for the lil bridge......overall height for \'kidney\'s\'= 55.5mm,bridge=5mm and port=7.1mm....angle of the bridge is a very conservative 50deg,exhaust ports inserts are removed,ports are opened to street port specs.Exhaust extractors are 2" running into 2 1/4 all the way to tips.Should be quiet and lazy,but hopefully about 25\\30 horses extra on flywheel.
See ya later with next engine update\\quiz

http://photobucket.com/albums/a184/eradeklerk/Rx7%2012A/?action=view¤t=DSCI0016.jpg
http://photobucket.com/albums/a184/eradeklerk/Rx7%2012A/?action=view¤t=DSCI0014.jpg
http://photobucket.com/albums/a184/eradeklerk/Rx7%2012A/?action=view¤t=DSCI0013.jpg

Sorry the pics are useless.........but its the idea that counts

[travellinbob]

Can we see a photo of the exhaust ports after the inserts have been removed please?
  cheers for the other photos.
 cheers, michael.

[oldone]

Hi there bud,of course i will post pics if i can get the camera working properly,or is it me to work the camera properly..... :guinness ....the ones i took came out all dark... :rollin .....

[Carl]

I have done a 3mm bridge before.
Regards
Carl