Testing New Pipe(s)

[Marty Davis]

I was asked to help test some new pipes this past weekend. It was 80 degrees here in St Pete (why did I put up with the snow for so many years) I know that it has been warmer than usual most places, but 80 degrees !!!!

All I can say is wait till you can get these. We tested the 40 and 20 pipes and I can say WITHOUT RESERVATION that both are better than ANY pipe I have ever run on either sized engine. The 40 pipe was tested with a stock CMB 45 and the 20 pipe with a modified MAC 21. Both pipes had more RPM and a TON MORE mid range and launchability than my pipes. The 40 was especially impressive. We were able to launch and run one sized bigger prop on a Sport 40 with MORE RPM and a LOT more speed. On the 20, I was able to turn more rpm and come out of the turns harder, also more speed. It was obvious that the pipe was much better. As many of you know, I tested as many pipes as I could get my hands on for my 20 over the years. It has always been by far my favorite class and this pipe puts all the other to shame. Yes, it is a quiet pipe. It is also loud enough (a somewhat different sound) to be able to hear the engine above others running.

I also saw the pipe for 67-90's run and it also appeared to be impressive. Didn't really see enough to make the same strong statement as I have on the 20 and 40 pipes, but it was designed using the same formulas, so I would bet that it is very good.

Can't say more until the builder decides to put out the infomation, but it is cool that someone has done his homework and we have better pipes than at anytime before.

Marty Davis

 

[Nigtmare]

That is good new Marty!!! :blink:

Now... where do I get one

Nick

 

[Speed Jr.]

Stop teasing us Marty!!!!

Larry Gempp Jr.

 

[Marty Davis]

That is good new Marty!!! :blink: Now... where do I get one

Nick

I would bet that they will be available VERY soon.

Marty Davis

 

[Tom Foley]

Ok , I need a 20 pipe a 40 pipe , a 60 pipe , 2 80 - 90 pipes , 2 - gas pipes , where do I order and lets hope they have mufflers built in so we don't have to clamp any more crap on the end s !!

 

[Norm Doerr]

Ok , I need a 20 pipe a 40 pipe , a 60 pipe , 2 80 - 90 pipes , 2 - gas pipes , where do I order and lets hope they have mufflers built in so we don't have to clamp any more crap on the end s !!

No need for mufflers from what I heard

 

[ALLAN YUEN]

Marty h34r: :blink: Show me picture of new style pipe at email:[email protected] thanks, Allan

 

[Chris Wood]

I was asked to help test some new pipes this past weekend. It was 80 degrees here in St Pete (why did I put up with the snow for so many years) I know that it has been warmer than usual most places, but 80 degrees !!!!
All I can say is wait till you can get these. We tested the 40 and 20 pipes and I can say WITHOUT RESERVATION that both are better than ANY pipe I have ever run on either sized engine. The 40 pipe was tested with a stock CMB 45 and the 20 pipe with a modified MAC 21. Both pipes had more RPM and a TON MORE mid range and launchability than my pipes. The 40 was especially impressive. We were able to launch and run one sized bigger prop on a Sport 40 with MORE RPM and a LOT more speed. On the 20, I was able to turn more rpm and come out of the turns harder, also more speed. It was obvious that the pipe was much better. As many of you know, I tested as many pipes as I could get my hands on for my 20 over the years. It has always been by far my favorite class and this pipe puts all the other to shame. Yes, it is a quiet pipe. It is also loud enough (a somewhat different sound) to be able to hear the engine above others running.

I also saw the pipe for 67-90's run and it also appeared to be impressive. Didn't really see enough to make the same strong statement as I have on the 20 and 40 pipes, but it was designed using the same formulas, so I would bet that it is very good.

Can't say more until the builder decides to put out the infomation, but it is cool that someone has done his homework and we have better pipes than at anytime before.

Marty Davis

just a hunch but my crystal ball is telling me it maybe one of these pipes.. hope they work

http://www.cooperpipes.com/price_sheet.html

chris

 

[mark voorhies]

I was asked to help test some new pipes this past weekend. It was 80 degrees here in St Pete (why did I put up with the snow for so many years) I know that it has been warmer than usual most places, but 80 degrees !!!!
All I can say is wait till you can get these. We tested the 40 and 20 pipes and I can say WITHOUT RESERVATION that both are better than ANY pipe I have ever run on either sized engine. The 40 pipe was tested with a stock CMB 45 and the 20 pipe with a modified MAC 21. Both pipes had more RPM and a TON MORE mid range and launchability than my pipes. The 40 was especially impressive. We were able to launch and run one sized bigger prop on a Sport 40 with MORE RPM and a LOT more speed. On the 20, I was able to turn more rpm and come out of the turns harder, also more speed. It was obvious that the pipe was much better. As many of you know, I tested as many pipes as I could get my hands on for my 20 over the years. It has always been by far my favorite class and this pipe puts all the other to shame. Yes, it is a quiet pipe. It is also loud enough (a somewhat different sound) to be able to hear the engine above others running.

I also saw the pipe for 67-90's run and it also appeared to be impressive. Didn't really see enough to make the same strong statement as I have on the 20 and 40 pipes, but it was designed using the same formulas, so I would bet that it is very good.

Can't say more until the builder decides to put out the infomation, but it is cool that someone has done his homework and we have better pipes than at anytime before.

Marty Davis

just a hunch but my crystal ball is telling me it maybe one of these pipes.. hope they work

http://www.cooperpipes.com/price_sheet.html

chris

WOW, Chris ,

I want your crystal ball!!!

 

[Tony Jacuzzi]

Marty:

Hope that you are well, I was just wondering about how we all should test pipes (eg the process). I purchased (6) different 21 pipes a while back and the testing procedure is so tedious I kind of gave up and focused all my attention on 1 pipe and trying to find a sweet spot, the right prop etc. and then documenting. I just wondered how you would go about it if I handed you 6 new pipes all different makes etc. I need to figure out a better quicker way to do this Thanks Tony J

 

[Marty Davis]

Marty:Hope that you are well, I was just wondering about how we all should test pipes (eg the process). I purchased (6) different 21 pipes a while back and the testing procedure is so tedious I kind of gave up and focused all my attention on 1 pipe and trying to find a sweet spot, the right prop etc. and then documenting. I just wondered how you would go about it if I handed you 6 new pipes all different makes etc. I need to figure out a better quicker way to do this Thanks Tony J

GREAT QUESTION Tony....

There are probably a lot of different ways of testing pipes. The one that we used this weekend was to get the boat as optimized as possible with the current setup. Work on getting the best prop, boat setup, engine tune, etc. Then document the speed, acceleration, launchability, mill, etc. Once you are convinced that you have a handle on how the current pipe performs ON THAT DAY, change to the new pipe. See how it launches, check speed, acceleration, etc and then if you are as good as the previous pipe, shorten it some (1/4" increments). If is continues to be better and also continues to produce more rpm as you shorten it, you have a pipe that has potential of being better than the one that you started with. If you can shorten it a BUNCH, as we were able to do, and the rpm picks up a lot then you have something special. All the time you are checking speed with a gun. In this particular pipe(s) we were able to shorten it a lot and still have better launchability and a LOT more speed (RPM). Once you get a pipe that is better, that becomes the standard and you try to find a pipe that is better than that one. I think that if may be some time before you find a pipe that replaces these.

The EXACT same testing principle that is outlined above is used for testing props. Only thing different is that I keep that best prop in my box and it never comes out until I get to the Nats or some special race. Once another prop is better, it then goes in the box.

There are probably other testing methods that are as good or better. Would be interested in hearing them... I am sure that I have missed a few little steps in the process. One thing that I forgot is the way to measure the pipe length as a starting point. Many just measure to the weld. The correct way is to measure to the center of the rear baffle cone (difficult if the pipe is a quiet pipe with the cone hidden). Getting the pipe length correct is 75% of the difficulty of the process. I also like to get my stinger diameter the same on all the pipes so that I have the same amount of pressure put into the tank. Again with most quiet pipes the stinger diameter is usually smaller than I like, so I have to make adjustment there also. With these new pipes this was NOT a concern.

Hope that answers your question....

Marty Davis

 

[Andy Greene]

I ran this pipe also during this test session with a VERY TIRED Mac .45 in a B-Mono and the gains were more than respectful. This WILL be my pipe of choice in my 20 and 40 boats untill someone can prove to me there is a better one.

 

[steve wood]

heard the 20 boat picked up 10 mph! is that right?

 

[Mike Larson]

C'mon Marty, lay the manufacturer on us! If it is cooper, when will they hit the market? thanks Mike

 

[steve wood]

C'mon Marty, lay the manufacturer on us! If it is cooper, when will they hit the market? thanks Mike

cooper offically released them today. steve told me that on the phone tonight

 

[Don Ferrette]

C'mon Marty, lay the manufacturer on us! If it is cooper, when will they hit the market? thanks Mike

The Cooper pipes are excellent, I have been testing the big block applications with great results. I think that Steve & Lynn have taken these pipes to the next level & I will be running their pipes for '07. I believe strongly enough in what they have accomplished to become an authorized dealer for Cooper pipes & will be keeping these pipes in stock for the 2007 racing season. I just added a web page with the pipe pricing if anyone is curious as to what these pipes will sell for or would like to order one (or more)- http://www.jackrabbitracing.com/cooperpipes.htm

 

[Andy Greene]

heard the 20 boat picked up 10 mph! is that right?

That would be correct. my B-Mono did as well. Cant wait to try it with fresh bearings, LOL.

 

[Norm Doerr]

heard the 20 boat picked up 10 mph! is that right?

Oh boy!!! Unbelievable You can't even see the yellow boat in the turns until it exits.

 

[Andy Greene]

How good is Cooper about returning calls ?? I have left a few messages already, any other contacts ??

 

[Dale0]

Where do you buy these pipes?