Converting a GY6 2 valve to 4 valve - by: dmartin95 - May 17, 2015 4:59:16 GMT -6
Post by dmartin95 on May 17, 2015 4:59:16 GMT -6
I have to mod the existing pipe. They include a bung.... I went ahead and ordered additional bungs because I'm going to go ahead and pull off all my exhaust pipes on all my scoots and install a bung on all of them.
The Ecotrons stuff I have is two separate kits:
ALM (Accurate Lambda Meter) is an air/fuel ratio (lambda) meter which uses Bosch LSU 4.9 wideband oxygen sensor and Bosch driver chip CJ125 to accurately measure the exhaust air/fuel ratio (AFR) of variant combustion engines.
Small Engine Fuel Injection Kit – 35cc to 300cc
Reason I'm isntalling bungs on all my scoots is so I can tune them with the ALM... You can use it to fine tune your scoot then uninstall it, cap off the bung and scoot about your merry way.
And as a side,,,( this is my opinion only) you got it "running" and it's making power i personally would abandon the carb and not fiddle with it any longer,,,it's a waste of time to get it "perfect" only to tear it apart and go with another intake system ,,,
I should have expanded a little more in my previous post... It's not just about getting her running perfect... Tuning these carbs is probably where I'm least experienced. No scoot mechanic is worthy of the wrench (errr actually, I should say screwdriver) he's using if he can't manage to tune a GY6 carb IMO...
So, it's a learning curve for me also....Besides, I can pull a carb, rejet it and have it re-installed in about 5 minutes flat...I'm having fun doing it so I wouldn't call it a waste of time...
cruise the internet i'm sure someone else has done this build already or one that's very close
I've found a few good sources like on totalruckus's GY6 swap section, but you would be surprised at the lack of information about 4 valve builds... Luckily, I have access to Taida's chief technician and that's who I have been going to for help.
These forums are good for the noobs who have question like hey, wht type of CDI do I have... But when you're into the kind of builds that I'm doing, these forums aren't very good sources of info.... If I start a thread that says exclaims i'm building a 4 valver and the chain doesn't fit, It's very unlikely the thread will even get a response simply cause no one knows...
Taida is like Lamborghini as to where Hoca and NCY types are like a camaro / firebird.... Taida products are what wins at the races and their engineers are helping me.
(don't get me wrong this is not a shot at you just my opinion,,,i think you're doing a stellar job and i must admit i am a tad jealous ,
Why would I take that as a shot at me?
I know sometimes people get into "pissing matches" on here and I even enjoy reading a good spirited debate, but on my end, I'm not about all that.... My purpose for participating in these forums is to learn and share what I have learned (and to meet new people, make some new friends)... While I have learned a lot, I still have a lot to go and never take good advice as a shot at me or in any other way than appreciative...
I want to hear new ideas or if I'm wrong, be corrected... I appreciate your advice brother! We all have busy lives and your taking time out of yours to share what you know... It's appreciated!
(something to think about),,,personally myself i like a torqey mill,,,more drivable for everyday street situations
Yeah, I've got a few torque monsters on the bench right now.... This 155cc I just built was a last minute engine that I decided to build so I could get some experience before going on to my taida engines....
What I have on the bench right now:
Another Taiwan Kit like this with the same type of 4 valve head, however the cylinder kit is a 63mm with a stroker of +3mm making for a 190cc. This is a rare a-case with the same style oil cooling as a b-case (oil ports on the crankcase)...
I have 2, of the 180cc power kits that Partsforscooters sells (picked them up on sale) - These are 2 - valve B-case motors
Then I have 2 Taida engines... Both are liquid and oil cooled, One is is a 191cc (63mm with a +3.5 stroker) and the other is the king of GY6's, it's a Taida 232cc.... 67mm piston with with +8.8mm crank... Both of these engines have custom made pistons to accommodate the stroke and both, are 4 valve...
The 232cc will be the ultimate that can be done with a GY6 150cc...
Man, this sure got long winded... Sorry for such a long post.... I feel like a wind up toy, you get me started talking and I just don't shut up