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ProModeler Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Aluminum Carb Spacer
03-06-2006 02:49 PM  11 years agoPost 1
HawkEyeMedia

Senior Heliman

Fort Worth, Texas

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I bought a pair of aluminum carb spacers from Pre-Mix. Very nice quality. I installed one on my G230RC powered Vario Benzine Trainer this weekend and put it in the air on Sunday. I borrowed a infrared thermometer to check my cylinder temps so I also used it to check the heat rise on the spacer and carb.

The ambient temp was 70. After a 10 minute flight, I shut down and checked some temps. The crankcase was 120, the spacer was 87 and the carb was 77. After 5 minutes the spacer was at 90 and the carb was at 80.

The aluminum block is sandwiched between a pair of teflon spacers. I used the standard gaskets on the mating surface of the crankcase and the carb.

I'm going to be flying with the camera mount on Tuesday so I'll see if the heavier load and higher engine temps make a difference. I really don't expect the temps at the carb to be much different.

The only thing I noticed was during the install, the combined height of the teflon spacers and the aluminum block is slightly taller than the original phenolic block, but it wasn't a problem.

Overall, I LIKE IT!

I'm going to install my second one on the Condor tonight.

THANKS PRE-MIX!

Mark LaBoyteaux
HawkEyeMedia.com

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03-07-2006 12:37 AM  11 years agoPost 2
Disciple4123

Key Veteran

USA

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Good review there. If you got yours already I shall get mine in a day or two. So are the teflon pieces somewhat hard like LDPE, or reslilient like gasket material? I may be short on gaskets if the original ones are to be used with it.

Let us know if anything develops with the thing.

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03-07-2006 04:44 AM  11 years agoPost 3
Pre-Mix

Senior Heliman

U.S.A.

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Aluminum spacer

Hi rc_combat,
Glad to hear you are having success with your insulator. Thanks for the hard data with your laset thermometer.
Good review there. If you got yours already I shall get mine in a day or two. So are the teflon pieces somewhat hard like LDPE, or reslilient like gasket material? I may be short on gaskets if the original ones are to be used with it
Disciple4123, you should receive your insulator today or tomorrow. There is no need to use any of the stock gaskets. Just use the two supplied teflon gaskets with the AL insulator. The teflon is quite soft so be careful when tighteining. Use a little bit of blue loctite on the screws and make sure to tighten the screws evenly.No need to make the screws very tight. Much like tightening a new spark plug. You will feel some initial resistance as the washer compresses, as soon as you feel resistance to tightening go up, stop there. Same goes for the insulator.

If anyone else is interested in one, please go to z-rc.com

regards, Johan

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03-07-2006 05:01 AM  11 years agoPost 4
HawkEyeMedia

Senior Heliman

Fort Worth, Texas

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Yeah, I wasn't sure if the gaskets were needed or not, so I installed them anyway.

On the Predator, I'm going to leave them off and just use the teflon spacers and aluminum block.

I flew the Vario today with the 10 lb camera mount and after landing the carb was only around 5 degrees above ambient. I didn't see any difference.

Mark LaBoyteaux
HawkEyeMedia.com

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03-07-2006 05:15 AM  11 years agoPost 5
Pre-Mix

Senior Heliman

U.S.A.

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Hi Mark,
very good to hear that the insulator passed the AP test. Thats one less thing you have to worry about!

Regards, Johan

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03-07-2006 05:17 PM  11 years agoPost 6
Pre-Mix

Senior Heliman

U.S.A.

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Disciple4123 PM sent.

Johan

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03-07-2006 11:46 PM  11 years agoPost 7
AceBird

Elite Veteran

Utica, NY USA

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The aluminum block is sandwiched between a pair of teflon spacers.
Hmmm ... Teflon is not very structurally stable. You may find your carb loosening up. Keep an eye on it.

Ace

Ace
What could be more fun?

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03-08-2006 04:00 AM  11 years agoPost 8
Pre-Mix

Senior Heliman

U.S.A.

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Hmmm ... Teflon is not very structurally stable. You may find your carb loosening up. Keep an eye on it.
Hi Acebird,
When I assemble the insulator I use just a tiny bit of blue loctite and have had no problems with the carb coming loose. I think this is partly due to the fact that the aluminum insulator has machined sealing ridges on both sides which essentially bite into the teflon eliminating any cold flow.
Im using the stock black SHCS (socket head cap screws) to secure the insulator to the engine and some stainless SHCS with no washers to secure the carb, no problems after many flights.

Johan

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03-08-2006 04:48 AM  11 years agoPost 9
Stet

Elite Veteran

Key Largo FL

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nice design, and I like the flow capture feature. Even if it does loosen after a lot of flights, that can be dealt with, whereas a tweaking phenolic is to be replaced

the phenolic block has always been the weak and cheezy link for otherwise high end helis

keepin' it real

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03-08-2006 05:52 PM  11 years agoPost 10
AceBird

Elite Veteran

Utica, NY USA

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Im using the stock black SHCS (socket head cap screws) to secure the insulator to the engine and some stainless SHCS with no washers to secure the carb, no problems after many flights.
Stainless!!! you don't say, aren't you worried about cracking?? LOL Just kidding. They look great. Looks like a great deal for 35 bucks.

Good luck with your venture.

Ace

Ace
What could be more fun?

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03-08-2006 09:05 PM  11 years agoPost 11
smosher

Senior Heliman

canada

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Nice looking spacers. Just ordered two (got a slightly warped original spacer).

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03-09-2006 12:10 AM  11 years agoPost 12
FLYINFOOL

Key Veteran

Cudahy, WI

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The aluminum block will not warp as easily as the plastic one.
It should be easier to avoid air leaks at the joints.


Jeff Borowski
RAMS Club President
www.ramsrcclub.com

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03-09-2006 06:07 AM  11 years agoPost 13
Pre-Mix

Senior Heliman

U.S.A.

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Stainless!!! you don't say, aren't you worried about cracking?? LOL Just kidding. They look great. Looks like a great deal for 35 bucks.
Hi Acebird,
The only thing Ill be cracking is my piggy bank to buy that stainless hardware The stainless does look quite nice and best of all, doesnt rust which is so common with the climate around here. Thanks for the kind words.

Feedback is always appreciated, let me know how the insulator works out for you all.

regards, Johan

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03-09-2006 01:24 PM  11 years agoPost 14
wesb1999

Senior Heliman

Athens, Texas

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I'm in! Order placed...
---------------------------

Wes

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03-09-2006 01:31 PM  11 years agoPost 15
OblongMushroom

Heliman

IL

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I could be wrong but it looks to me like this alloy block is more for bling. have 3 zenoah G engines and have never had any problems with the stock blocks warping or anything. I Would love to here what the real plus is on this item.

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03-09-2006 01:51 PM  11 years agoPost 16
Smithprod

Veteran

Oklahoma

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Excellent, just ordered! That stock block is a piece of garbage...

Brad

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03-09-2006 02:29 PM  11 years agoPost 17
OblongMushroom

Heliman

IL

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really! how so? I'm not a pro at this stuff but would love to know wy you say that.

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03-09-2006 03:28 PM  11 years agoPost 18
smosher

Senior Heliman

canada

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From my experience, not all of my stock spacers warped. However, I have one that did, it leaks air and I can't it tuned right. This will work as a replacement - no problem. For me, replacing a broken or damaged part is not "bling" - replacing a working part would be.

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03-09-2006 05:57 PM  11 years agoPost 19
AceBird

Elite Veteran

Utica, NY USA

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I could be wrong but it looks to me like this alloy block is more for bling. have 3 zenoah G engines and have never had any problems with the stock blocks warping or anything. I Would love to here what the real plus is on this item.
For you and me there is no plus but for some people they have trouble in this area. I think their problems stem from overtightening or uneven tightening. The aluminum block will withstand more abuse and should be more forgiving. If the teflon stands up, it is not a bad why to go.

Ace

Ace
What could be more fun?

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03-10-2006 04:13 AM  11 years agoPost 20
OblongMushroom

Heliman

IL

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yeah Ace, I see what you are saying.

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