Cox International wish list

SuperDave wrote:

PV Pilot wrote: I have popped several head fins off with the old wrenches because the engagement lugs don't stand tall enough and slip under the fins.

...To remove a frozen cylinder, I use two small blocks of soft wood using them in a small vice to hold them snuggly together thus obtaining a firm but not too tight purchase on the cylinder. Then turn the crankcase CCW....

That's my method as well.

If cost was not an issue, I would like to see production of pre-'96 Black Widow cylinders that have the deep bypass ports and a matched piston set. I'd put that on all of my Bees. That is a one of a kind cylinder and the only ones out there are all on engines. When they wear out they're gone.

We already have manufactured the wrenches for all the Cox engines and they are for sale here:

http://coxengines.ca/home.php?cat=41

Stainless steel is the material of choice as they resist bending and premature wear.

For our own use we had manufactured a commercial grade set of head and cylinder tools. Cost = $300.

Re pre-1996 cylinders. These are essentially like these:

http://coxengines.ca/product.php?productid=119&cat=13&page=1

and our tests have shown that they outperform the OEM pre-1996 BW cylinders.

Bernie
www.coxinternational.ca

Cox International wrote:We already have manufactured the wrenches for all the Cox engines and they are for sale here:

http://coxengines.ca/home.php?cat=41

Stainless steel is the material of choice as they resist bending and premature wear.

For our own use we had manufactured a commercial grade set of head and cylinder tools. Cost = $300.

Re pre-1996 cylinders. These are essentially like these:

http://coxengines.ca/product.php?productid=119&cat=13&page=1

and our tests have shown that they outperform the OEM pre-1996 BW cylinders.

Bernie
www.coxinternational.ca

They have to have the Tee Dee high compression head to out perform the old BW, don't they? Otherwise it's the same as any non-SPI cylinder, IIRC.
What do you think it would do with a short piston, giving it the addition of SPI?

That is incorrect as the cylinders actually have the TD porting inside; which is more aggressive than the old Black Widow ones.

The cylinders do not work well with our SPI pistons are there is "too much SPI". We ran tests with them. Even though they are non-SPI the RPM is almost identical to the old SPI Tee Dee cylinders; which substantiates that SPI is not that important for rotary valve Cox engines.

If you really want a Black Widow engine to scream, this is the product to use:

http://coxengines.ca/product.php?productid=122&cat=13&page=1

On reed valve engines we have seen RPM increases anywhere from 2,000 to 5,000 RPM. It really depends on the engine. On a Black Widow it matches or exceeds pre-1996 specs.

Bernie
ww.coxinternational.ca

Thanks for the reply Bernie.

A new design DC 1/2A starter would be another one for the list. Since no one is making these any more it seems.

PV Pilot wrote:Thanks for the reply Bernie.

A new design DC 1/2A starter would be another one for the list. Since no one is making these any more it seems.

Sulivan makes a 1/2a starter called the Sullivan hornet.

A email from Sullivan when I enquired:

Thanks for your interest in our S598 Hornet Starter.
The Hornet has been out of production for quite a while now due to a redesign in the starters case.

As of today I don't have an ETA, but I will keep your info on file for product updates.

regards,

Alex
Sullivan Products

That is unlucky but I have never used an electric on any cox engines and do note believe it to be necessary.

nitroairplane wrote:That is unlucky but I have never used an electric on any cox engines and do note believe it to be necessary.

Nor do I. My "starter" is located on my hand right next to my index finger.

SuperDave

Mine is located in between my thumb and the finger I use for gettin back at people who cut up on the road.

nitroairplane wrote:Mine is located in between my thumb nd the finger I use for gettin back at people who cut up on the road.

AKA your "social finger".

SD

SuperDave wrote:

nitroairplane wrote:Mine is located in between my thumb nd the finger I use for gettin back at people who cut up on the road.

AKA your "social finger".

SD

yes it comes out at all social occasions

Or you COULD say it's right next to the finger you use for pickin' your nose.

(When no one is lookin' of course)

BUHHHHHHHA!

SD

SuperDave wrote:Or you COULD say it's right next to the finger you use for pickin' your nose.

(When no one is lookin' of course)

BUHHHHHHHA!

SD

That is the Dog for victory shovel.

When I was like 4 of course.

Cox International wrote:That is incorrect as the cylinders actually have the TD porting inside; which is more aggressive than the old Black Widow ones.

The cylinders do not work well with our SPI pistons are there is "too much SPI". We ran tests with them. Even though they are non-SPI the RPM is almost identical to the old SPI Tee Dee cylinders; which substantiates that SPI is not that important for rotary valve Cox engines.

If you really want a Black Widow engine to scream, this is the product to use:

http://coxengines.ca/product.php?productid=122&cat=13&page=1

On reed valve engines we have seen RPM increases anywhere from 2,000 to 5,000 RPM. It really depends on the engine. On a Black Widow it matches or exceeds pre-1996 specs.

Bernie
ww.coxinternational.ca

Part 1, SPI on a Tee Dee; now I feel like a dufus. I forgot about the rotary valve. SPI raises the crankcase pressure right before the reed opens causing a larger burst of fuel when the pressure drops during the intake cycle. That's the way I understand it anyway, I hope I got that part right. So that pressure would cause an undesired reduction in intake volume, or worse, and slow down a Tee Dee.

Part 2, wanting my BW to scream; I learn something every day, I did not know the porting of a new type SPI cylinder was more aggressive than the old #1 SPI cylinder. Just to be clear, I believe this is the one you mean. Gotta get that on my shopping list soon. A Much safer way to boost it that 35% nitro.

Is the Tee Dee cylinder any different from that one, other than having open exhaust? If I put it on a BW, how would that compare to the SPI set. How about with and without the high compression Tee Dee head? Or the Tee Dee head on the SPI set. Dang, I'm awfull inquisitive ain't I. Well when I have the attention of the man, I better take advantage of it.

In one swipe, you rendered two of my earlier posts in this forum answered.

Thanks, Bernie

Rusty

Another thing to remember is that the older TD cylinder/pistons were also tapered. This resulted in higher performance than a standard Black Widow cylinder/piston set.

Matt

Does anyone have any plans (or know a source) for any thrust washers for the Tee Dee .09? I have one that is a little "chewed up" around the edge...

Thanks!

Allen

Is that the same P&C used on the KillerBee you sell.? That engine looks to have similar power to a Medallion .049

AT1984 wrote:Does anyone have any plans (or know a source) for any thrust washers for the Tee Dee .09? I have one that is a little "chewed up" around the edge...

Thanks!

Allen

Allen,

They should be done in a month or so.

Regards, Matt

AT1984 wrote:Does anyone have any plans (or know a source) for any thrust washers for the Tee Dee .09? I have one that is a little "chewed up" around the edge...

Thanks!

That will teach you about using pliers on aluminum!!!!!

SuperDave

SuperDave,

I didn't use the pliers on the prime example of the Tee Dee .09 I just bought...The previous owner did that! It's in REALLY nice shape, other than the washer.

Matt: Thanks for the reply. Just so there's no confusion: I'm talking about the phenolic washer that goes behind the drive plate.

Thanks again,

Allen

AT1984 wrote:SuperDave,

I didn't use the pliers on the prime example of the Tee Dee .09 I just bought...The previous owner did that! It's in REALLY nice shape, other than the washer.

Matt: Thanks for the reply. Just so there's no confusion: I'm talking about the phenolic washer that goes behind the drive plate.

Thanks again,

Allen

Allen,

Yes, they will be the thrust washer not the prop driveplate. We already have those in stock.

Matt