RE: CRRC PRO GF26I  
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RE: CRRC PRO GF26I - 3/13/2007 9:41:23 AM   
hardtop351


 

Posts: 257
Joined: 12/28/2005
From: rockhampton, AUSTRALIA
Status: offline
quote:

ORIGINAL: Bosshossv8

My ignition is going back....hopefully I can try a new one soon. I wonder if just re-setting to 28 BTDC would do it, but Iwill eait for the other ignition.

Also, the sensor is going to have to be moved or changed to get TO 28 BTDC, eh? I dont think there is enough adjustment in the slots for that.


yes i agree with you. mine is going back too. i have my engine running on alcohol fuel...but the static timing is a little too far. its too far for ordinary fuel too. im thinking of drilling and tapping a new set of holes for the pickup. lol

i dont want to go making huge changes to this engine. id rather find the problems and report them back to the factory....hopefully the factory will listen and address them so as not to have these problems carry on to the production versions.

it seems that so far they have listened with relation to the CDI units.....how about addressing the gritty bearings and shaft seal problems too??. although i think that this is an isolated case.

cheers
craig

(in reply to Bosshossv8)
       Post #: 76

RE: CRRC PRO GF26I - 3/13/2007 1:06:38 PM   
Bosshossv8


 

Posts: 1659
Joined: 8/12/2003
From: Schiller park, IL, USA
Status: offline 		Hardtop my bearings seem smooth as glass. Yes, I agree, the factory will want to address the problems , they are very pro-active and want to get it right . So far, I have had very good comm with them, and can tell they are working hard on it.

This is a nice little motor and I will love to see it fly my Yak.

_____________________________

"Are you brave enough to milk a Yak?"

(in reply to hardtop351)
       Post #: 77

RE: CRRC PRO GF26I - 3/13/2007 3:29:06 PM   
hardtop351


 

Posts: 257
Joined: 12/28/2005
From: rockhampton, AUSTRALIA
Status: offline 		hey hey all....

just to give some figures so far with my rough running engine...

these figures were taken with the engine using methanol/synthetic oil...

top rpm....8700rpm
idle..........2200rpm
prop used....Master Airscrew Classic 16x10

while this engine is working...it vibrates a LOT!!....i think this has a lot to do with the timing being out and using different fuel to what the timing is set at.

i will try petrol fuel in the next day or so but will leave the timing where it is for now

cheers
craig

(in reply to Bosshossv8)
       Post #: 78

RE: CRRC PRO GF26I - 3/14/2007 10:39:39 AM   
jbflier



Posts: 864
Joined: 2/1/2002
From: Concord Twp, OH, USA
Status: online 		Actually, the BCMA 26 for $100.00 less (and a proven engine) seems like a no brainer...........

_____________________________

John

(in reply to WesternHobbies)
       Post #: 79

RE: CRRC PRO GF26I - 3/14/2007 2:58:22 PM   
TrikeFlyer


 

Posts: 79
Joined: 2/14/2007
From: Rowlett, TX, USA
Status: offline 		JBFlier the engine we are testing is not the GF26I with CNC crank case and pitts muffler you see on Western Hobbies web site.

This is a new sport GF26I with cast crank case and side dump muffler very comparable to the BCMA26 sport.

Since these are "factory prototype" engines we do not know what price these new engines will be marketed at.

Trike

(in reply to jbflier)
       Post #: 80

RE: CRRC PRO GF26I - 3/15/2007 12:45:42 AM   
spitmad


 

Posts: 454
Joined: 1/24/2005
From: MentoneVictoria, AUSTRALIA
Status: offline 		Guys


have you tested the CRRC 65cc as yet........I picked one up from the Australian importer yesterday and will attemp to get it running over the next week ..........hopefully without the dramas you have had

cheers


Alan

(in reply to TrikeFlyer)
       Post #: 81

RE: CRRC PRO GF26I - 3/15/2007 12:57:48 AM   
TrikeFlyer


 

Posts: 79
Joined: 2/14/2007
From: Rowlett, TX, USA
Status: offline 		Hey...Hey.. Hardtop and BossHoss finally finished the new test stand and ran a couple props with my new tach (GloBee).

Temp 71 F Humidity 62% Dew Point 57 F MSL 640

BTC timing 30 degrees

87 octane Penz ail cooled 40:1


first test Hawk 16 X 8 best smooth idle 1860-1890
lowest Idle 1770-1800

Top RPM 7800


second Test ZOAR 17 X 6 best smooth idle 1680-1700
lowest idle 1480-15-20

Top RPM 7530

Still low time engine and can be tuned a little better, so possibly better number with finer tuning However the transition is immediate and smooth without any hesitation. The spool up is a little slower with the 17 X 6. When I first put the 17X6 on I got a top RPM of 8200 but then I could not duplicate it.

I am manually operating the throttle so could not hold tach, tune carb and operate throttle at same time. When I get a helper I will retune again.


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(in reply to spitmad)
       Post #: 82

RE: CRRC PRO GF26I - 3/15/2007 1:02:15 AM   
TrikeFlyer


 

Posts: 79
Joined: 2/14/2007
From: Rowlett, TX, USA
Status: offline 		Forgot to explain the pictures in last post. With my first stand that had the sheet metal corners with 1/2 plywood just bolted to the angles I got a lot of vibration when I would quickly open the throtle and rev up the engine. Not to bad at idle.

My second Test Stand is 3/4 plywood glued and screwed together. Can barely notice any vibration when idling and at full tilt is realy smooth l with very little vibration.

This engine continues to start better every time. When cold put thumb over carb and flip 3 or 4 times with EI off, turn on EI and flip 2 or 3 times it is running.

When warm or second or more run, put thumb over carb and flip 2 or 3 times with EI off, turn on EI and usually it will start the first flip, but if it doesn't it will always start the 2nd flip. Very user friendly.

I like this engine alot. It starts easier than my glow engines and tuning is very easy and forgiving. I may not have it tuned to the max performance yet, but I am very pleased with how easy it is to start. No fiddling, no adjusting just prime, turn on ignition and flip and it is running and smoothly at that.

Next step is installing the GF26 in my Sea Gull Laser 200. It should be a great match as the Laser is designed for 1.20 -1.50 4 strokes.


(in reply to TrikeFlyer)
       Post #: 83

RE: CRRC PRO GF26I - 3/15/2007 12:13:28 PM   
hardtop351


 

Posts: 257
Joined: 12/28/2005
From: rockhampton, AUSTRALIA
Status: offline
quote:

ORIGINAL: spitmad

Guys


have you tested the CRRC 65cc as yet........I picked one up from the Australian importer yesterday and will attemp to get it running over the next week ..........hopefully without the dramas you have had

cheers


Alan


i didnt know the factory made a 65 cc engine. any chance of you posting a piccy of it??. and who is importing these engines here in australia??

i have one of the new 26 cc engines for testing...nice engine but does have a few dramas that are well in hand to being sorted.

cheers
craig

(in reply to spitmad)
       Post #: 84

RE: CRRC PRO GF26I - 3/15/2007 12:39:16 PM   
Bosshossv8


 

Posts: 1659
Joined: 8/12/2003
From: Schiller park, IL, USA
Status: offline 		TRike,

even if you got the motor running with the ignition supplied , I think it's advance curve may be off, and your top rpm may suffer.

I will wait for an "approved" ignition.

My EF YAk-5 68" will need a little more rpm than that.

_____________________________

"Are you brave enough to milk a Yak?"

(in reply to hardtop351)
       Post #: 85

RE: CRRC PRO GF26I - 3/15/2007 3:48:52 PM   
Herby 1


 

Posts: 10
Joined: 4/26/2003
From: Northern Arizona
Status: offline 		An advance curve is just another urban myth on 2 cycle gassers... The advance "curve" has nothing to do with the max rpm, there is no more advance after 4000 rpm on most ignitions...Too much is being made of a curve, it's just not a factor...The main reason for a "curve" is ease of starting, after that it's nothing....An engine runs just as will with no advance at all except under 2000 rpm....

(in reply to Bosshossv8)
       Post #: 86

RE: CRRC PRO GF26I - 3/15/2007 6:22:50 PM   
TrikeFlyer


 

Posts: 79
Joined: 2/14/2007
From: Rowlett, TX, USA
Status: offline 		Hey BossHoss, RCIGN1 is correct, there is no special "advance curve".. The whole object of these so called auto advance ignition units is to RETARD the spark advance at idle so they are easier to hand start and will idle slower & smoother. A lot of advance at idle makes the engine run rougher.

No matter which type of CDI unit you have IE fixed or auto advance, you set the initial BTC timing the same way for wide open throtle advance. So any "curve" could not hurt your top end RPM numbers at wide open throttle.

Trouble is, the above test numbers were not "wide open throttle" as when I was putting all my stuff away last night after my Test Runs, I discovered I had left the choke on half way so all my test run results are flawed. The choke being half on limited my top RPM as it restricts the amount of air into the carb even though I tuned the high speed needle for best RPM (less 200).

I received a phone call just after I started the engine and it was warming up. When I went back to run my test I forgot I had put the choke on half way to help warm up.

Sorry guys, please disregard the numbers in my earlier post as not true performance results. Will re run again tonight.

(in reply to Herby 1)
       Post #: 87

RE: CRRC PRO GF26I - 3/15/2007 9:11:32 PM   
Bosshossv8


 

Posts: 1659
Joined: 8/12/2003
From: Schiller park, IL, USA
Status: offline 		That's fine, I am not savvy when it comes the ignition advance. All I know is mine walloped my hand ( with welding glove) about 40 times trrying to start it.

I can wait for the correct ignition, the weather here is not cooperating. I am hoping that this motor can replace a YS1.10 4 stroke without too much loss of power. That would be sweet.

_____________________________

"Are you brave enough to milk a Yak?"

(in reply to TrikeFlyer)
       Post #: 88

RE: CRRC PRO GF26I - 3/16/2007 1:01:52 AM   
TrikeFlyer


 

Posts: 79
Joined: 2/14/2007
From: Rowlett, TX, USA
Status: offline 		Ok, after unloading a 20 ft container today I found time to re-run my Hawk ( looks like a XOAR) 16 X 8 prop only this time with the choke wide open. And the results are:

79 degrees 40% humidity Dewpoint 53 degrees

Penzoil Air Cooled 40:1

lowest smooth idle 1800 to 1850

Top RPM 8150 to 8200

Hardtop, I believe my wood prop is pulling more air than your MAS plastic prop. Also, the vibration you are seeing may be your prop is out of balance. Have you checked it??

Funny thing, my Hawk 16X8 is almost dead nuts on balance where as in comparison my XOAR 17 X 6 is quite a bit out of balance. So I won't run the XOAR 17 X 6 test again until I balance the prop.

Unlike your results Hardtop, my engine idles very smooth with hardly any noticble vibration and at WOT it still has very little vibration. Much less than my OS 4 strokes.

As far as I am concerned, the engine is broke in enought to put in my Laser and go fly as soon as I finish the assebly of the Laser.

Trike


(in reply to Bosshossv8)
       Post #: 89

RE: CRRC PRO GF26I - 3/16/2007 4:51:00 AM   
spitmad


 

Posts: 454
Joined: 1/24/2005
From: MentoneVictoria, AUSTRALIA
Status: offline 		Craig


The wholesaler is based here in Melbourne (Roger Lee) see his ebay site Planet Roger (http://stores.ebay.com.au/Planet-Roger), they are selling on Ebay from $300 to $435 depending on how lucky you are .
The engine casting are a bit rough, comes complete with a pits style muffler and the gen 3 ignition, he tells me there is a guy test flying a 94" Extra fitted with the new 65cc donk this Sunday........I mentioned all the probs I have read about with the 26 and 45cc and he assures me they have all be rectified.
I hope to have mine on the test bench this weekend for a run........I'll let you know how it goes, if they are any good I'll be buying another for a 96" Spit that I'm building