racer365r

i ofen considered porting my own engine,i wonder how it would run with no accurate measurments,i mean now don't assume i would go crazy
on the engine,i got dremels small and various sizes,but say if a lad worked in small incriments from the transfers and intake port,and was nice and neat,i wonder would
it make a differnce,say if a lad had a donor head he didn't mind trying it out on. i know a racer friend who does his own,he copies another proper tuned one

rangerfredbob

My Feedback: (13)

download yourself a degree wheel and check yourself every so often and it should be ok. I've done it on weedeater engines converted to airplane use with good success.

racer365r

thanks!!!

i may use an old engine to try so if it goes 'bottom up' i don't care,i will check for that degree wheel,as i was saying a local lad i know done
it on a cy 23cc just for laughs and to see if it would work and it made a differnce,i think he said at the start it eat a few plugs i guess from the timing been
a little funny but in theory it should work. it's always good to have a 'tuned' engine to copy and maybe stick to that style.oh also maybe to start small
and just to small incriments of work to engine. that above post was very useful ranger,any more try this?

proanti1

My Feedback: (2)

.

46u

My Feedback: (3)

Cut and paste from another.


Porting and Port Timing Terms and Engine Terminology
http://www.2-stroke-porting.com/terminology.htm

Do you know what the difference between torque and horsepower is?
http://www.hpibajaforum.com/forum/sh...hlight=cutting

Link to download a pdf file of Jennings Two stroke tuners handbook. (This is a big download, but worth it)
http://www.edj.net/2stroke/jennings/...rshandbook.pdf <-right click on link then do a "save target as" windows users

ZENOAH MODEL ENGINE SOFTWARE (For all Zenoah 22 to 26cc including, goped, marine, helicopter, model aircraft, car.
Also suitable for Sikk and CY engines) NOT free but thought if someone wants it here is the link (located in the UK)
http://www.prestwich.ndirect.co.uk/etp/zenoahtuning.htm

2 Stroke Gas Engine Modifying Program Other program NOT free this one is price at $60.00
http://www.shop.performanceunlimited...words=software

Port Timing Calculator
http://www.modelenginenews.org/desig.../TCalcForm.php

How do I measure the port timing on my engine?
http://www.rcfaq.com/ANSWERS/ENGINES/TIMING.HTM

Port Timing and Squish
http://www.modelgasboats.com/Magazin...nd_Squish.html

RCMK Engine Modification
http://www.modelgasboats.com/Magazin..._Modification/

videos on how to uses a timing wheel,engine mod,tips,etc (VERY GOOD videos A MUST TO WATCH!!!)
http://www.whobbies.com/fullthrottle1.htm

what are some good blowdown numbers to aim for?
http://www.hpibajaforum.com/forum/sh...ad.php?t=85332

Suggested 29CC Zenoah cylinder mods(4 bolt head)
http://www.jrcbd.com/showthread.php?t=38855

More port info with pics
http://www.jeroentune.nl/motors.htm

Porting the Zenoah .. A step by step photo gallery / updated
http://bigscale-tourwagens.be/tuning.php?page=5

Porting a 23cc CY engine and info on how to pin the cylinder
http://www.hpibajaforum.com/forum/sh...=case+matching

Porting a CY29, what can i expect from these changes
http://www.hpibajaforum.com/forum/sh...hlight=porting

First attempt at porting an engine (using DarkSoul case and cylinder matching templates DDM part number cc200)
http://www.hpibajaforum.com/forum/sh...=case+matching

The effects of raising & lowering the port timings
http://www.hpibajaforum.com/forum/sh...ad.php?t=66115

Zenoah G260 Piston Mods
http://www.martysrcboats.com/260mods.htm

Squish Tool
http://www.modelgasboats.com/Magazin...t/Squish_Tool/

Good porting tools
http://www.hpibajaforum.com/forum/sh...hlight=porting

Who does their own porting and polishing??????
http://www.hpibajaforum.com/forum/sh...hlight=porting

Porting a car engine vs. boat engine
http://www.hpibajaforum.com/forum/sh...hlight=porting

Finally ported that old CY29 (some timing number in this thread to!)
http://www.hpibajaforum.com/forum/sh...hlight=porting

2 Stroke Cylinder Mapping
http://macdizzy.com/cyl_primer.htm

Have much work to do. (more on the DS template)
http://www.hpibajaforum.com/forum/sh...hlight=porting

How to check squish with solder (towards the end of video 6 from Team FastEddy and DarkSoul racing,HPIBajaTutorials)
http://www.youtube.com/watch?v=MAzWd...layer_embedded

racer365r

wow 46u you have just turned this thread to gold ]

thanks!!

46u

My Feedback: (3)

I played around with some porting not a lot but do to my bad old eyes and old shaky hands I gave up. [X(] It is hell getting old.

Foxy

OP has been banned. Thread locked.

simon-rs

good thread i always wondered how it was done,the links are good

simon-rs

thought i jus posted ere? [&:]