Pacer 70 build (from Big Tee Racing)
03-19-2011, 03:10 PM
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RE: Pacer 70 build (from Big Tee Racing)
Hard steel tube against a steel flex is not something i would use,you need a soft brass tube or you will wear out the flex cable very quickly in my opinion.Teflon liners in my opinion are also a waste of time which is why i suggested a brass tube which is the tried and tested method.Ditch the ss tube and go with brass and you wont have any problems,why take the risk 
.The 12 1/2" (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70" boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
.The 12 1/2" (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70" boat.I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
03-19-2011, 03:36 PM
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RE: Pacer 70 build (from Big Tee Racing)
Mart,
Thanks for the info re the pipe.
Still going to run the with the stainles tube, I like to experiment and some people have got this system to work well. Will let you know how I get on.
You could well be right about the Zen7 in this kind of hull, but for now it is what I have got. 29cc or such will come later [8D]
Thanks for the info re the pipe.
Still going to run the with the stainles tube, I like to experiment and some people have got this system to work well. Will let you know how I get on.
You could well be right about the Zen7 in this kind of hull, but for now it is what I have got. 29cc or such will come later [8D]
03-20-2011, 05:50 AM
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RE: Pacer 70 build (from Big Tee Racing)
hi guy
as tony (radman35) has said he has being useing the ss tube for the flexi for the last 2 seasons and still useing it for the 3rd season and there no sign of ware on them both so it should be ok as others have said keep it well lubed though with the oil........
so i would say it been tried and tested too with good results
where did you get the ss tube from ???????
as tony (radman35) has said he has being useing the ss tube for the flexi for the last 2 seasons and still useing it for the 3rd season and there no sign of ware on them both so it should be ok as others have said keep it well lubed though with the oil........
so i would say it been tried and tested too with good results
where did you get the ss tube from ???????
03-20-2011, 08:18 AM
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RE: Pacer 70 build (from Big Tee Racing)
Viper,
Thanks for the info on the pipe, the tube will remain well lubed [8D]
Machetteman,
The SS tube came from Radman35, I just ordered it all as one drive train package to go with the boat and that is what came with it. I have no doubt it works, he has proved it and fortunately lube is not something I am short of so all should be good.
Even though the boat is not ready, I took it up to the lake today to socialise with some of the other boats, will post a pic later.
Thanks for the info on the pipe, the tube will remain well lubed [8D]
Machetteman,
The SS tube came from Radman35, I just ordered it all as one drive train package to go with the boat and that is what came with it. I have no doubt it works, he has proved it and fortunately lube is not something I am short of so all should be good.
Even though the boat is not ready, I took it up to the lake today to socialise with some of the other boats, will post a pic later.
03-20-2011, 09:48 AM
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RE: Pacer 70 build (from Big Tee Racing)
Here she is, hanging out up at the lake, waiting for some other boats to come up and say "hi".
03-20-2011, 11:22 AM
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RE: Pacer 70 build (from Big Tee Racing)
Yep, the Leon is mine. I will clean it in the summer. I promise.[:-]
The Pacer 70 does fit in it. I have to move the passenger seat forward and then recline it all the way back. The ass end, stinger and rudder hang into the foot well and the bow sits up by the back seat head rest.
The Pacer 70 does fit in it. I have to move the passenger seat forward and then recline it all the way back. The ass end, stinger and rudder hang into the foot well and the bow sits up by the back seat head rest.
03-20-2011, 01:28 PM
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RE: Pacer 70 build (from Big Tee Racing)
ORIGINAL: martno1fan
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
03-20-2011, 01:45 PM
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RE: Pacer 70 build (from Big Tee Racing)
Dave,
Thanks, I am sure the Zen7 will do its stuff
Due to me measuring my exhaust length all wrong I now realise I have plenty of room to get the pipe length at 345mm and more so should be good to go with a 7015/3 to start with. Am I way off the mark thinking that the 6717/3 has a smaller diameter but a greater pitch? Then the engine needs a longer pipe for more torque rather then RPM?
Thanks, I am sure the Zen7 will do its stuff
Due to me measuring my exhaust length all wrong I now realise I have plenty of room to get the pipe length at 345mm and more so should be good to go with a 7015/3 to start with. Am I way off the mark thinking that the 6717/3 has a smaller diameter but a greater pitch? Then the engine needs a longer pipe for more torque rather then RPM?
03-20-2011, 02:09 PM
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RE: Pacer 70 build (from Big Tee Racing)
ORIGINAL: intenserapture
Dave,
Thanks, I am sure the Zen7 will do its stuff
Due to me measuring my exhaust length all wrong I now realise I have plenty of room to get the pipe length at 345mm and more so should be good to go with a 7015/3 to start with. Am I way off the mark thinking that the 6717/3 has a smaller diameter but a greater pitch? Then the engine needs a longer pipe for more torque rather then RPM?
Dave,
Thanks, I am sure the Zen7 will do its stuff
Due to me measuring my exhaust length all wrong I now realise I have plenty of room to get the pipe length at 345mm and more so should be good to go with a 7015/3 to start with. Am I way off the mark thinking that the 6717/3 has a smaller diameter but a greater pitch? Then the engine needs a longer pipe for more torque rather then RPM?
03-20-2011, 02:29 PM
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RE: Pacer 70 build (from Big Tee Racing)
Dave,
Once again thanks.
Ok, more questions. Sorry. If the 6717/3 will load the motor more, and top rpm will be lower, will the speed of the boat be the same, marginal or way out compared to a higher revving bigger prop opf less pitch? Is it just a two ways of getting the same result? And how will raising the the stinger up and down the transom effect this with various props?
Once again thanks.
Ok, more questions. Sorry. If the 6717/3 will load the motor more, and top rpm will be lower, will the speed of the boat be the same, marginal or way out compared to a higher revving bigger prop opf less pitch? Is it just a two ways of getting the same result? And how will raising the the stinger up and down the transom effect this with various props?
03-20-2011, 02:41 PM
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RE: Pacer 70 build (from Big Tee Racing)
ORIGINAL: DaveMarles
Mart, You talk nonsense. ZEN7 and 7015/3 is ca 345mm to start and using a 6717/3 in anything other than a light smallish boat would need a longer pipe length. Leave it to the people who are running engines to tell what is correct not what you think or heard. A ZEN7 is perfectly capable of pushing a big boat.
ORIGINAL: martno1fan
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
03-20-2011, 03:02 PM
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RE: Pacer 70 build (from Big Tee Racing)
ORIGINAL: brodjack
classic,lol
ORIGINAL: DaveMarles
Mart, You talk nonsense. ZEN7 and 7015/3 is ca 345mm to start and using a 6717/3 in anything other than a light smallish boat would need a longer pipe length. Leave it to the people who are running engines to tell what is correct not what you think or heard. A ZEN7 is perfectly capable of pushing a big boat.
ORIGINAL: martno1fan
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
The 12 1/2'' (320 mm ish) measurement is from flange to wide part of pipe,this is where i and others have found is the best setting for the pipe with the 6717/3 and 7015/3,bigger prop will change that but you need in and outward adjustment so you can play ,i was giving my opinion of where your pipe will end up at with those two props with a full mod 260 but then again this is a 70'' boat.
I still think the zen 7 is the wrong choice in that boat,a 29-30 cc zen would be much better suited especially with a big prop,the zen 7 is a high revving motor not suited to large props or larger hulls for that matter.Anyway no worries this is only my opinion take from it what you wish or not,ill be watching with interest especially on the ss tube.
Mart
03-21-2011, 07:39 AM
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RE: Pacer 70 build (from Big Tee Racing)
New radio box and IV fuel bag arrived today, so more building to do tonight 
After that, really not much to do. Just a few finishing jobs
After that, really not much to do. Just a few finishing jobs
03-24-2011, 01:27 AM
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RE: Pacer 70 build (from Big Tee Racing)
OK, have made some progress.
Radio tray made up ready for epoxy and fitment, fuel bag sits between the engine and radio and box and can slide just under the radio box for better fitment. Water outlets fitted, and lid sanded down to a better fit.
Not far to go now!
Radio tray made up ready for epoxy and fitment, fuel bag sits between the engine and radio and box and can slide just under the radio box for better fitment. Water outlets fitted, and lid sanded down to a better fit.
Not far to go now!
03-27-2011, 01:15 PM
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RE: Pacer 70 build (from Big Tee Racing)
First trial run today of the Pacer 70 and so far very, very happy. This thing has presence on the water[8D]
There are a few issues to iron out, nothing major just set up mainly. Learning curve.
I did discover that my steering servo has not nearly enough power, anything over 1/2 throttle and it would only go in a striaght line. New servo needed.
Some pics, sorry there are just from a small crappy camera.
There are a few issues to iron out, nothing major just set up mainly. Learning curve.
I did discover that my steering servo has not nearly enough power, anything over 1/2 throttle and it would only go in a striaght line. New servo needed.
Some pics, sorry there are just from a small crappy camera.
03-27-2011, 09:46 PM
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RE: Pacer 70 build (from Big Tee Racing)
Did you leave the fuel bag as it was? Forward motion would move the fuel away from you outlet. As well as the Y piece does not go into the bag deep enough and it would pinch there and starve the motor of fuel causing it to run lean. Just my 2 cents.
Cobus
Cobus
03-28-2011, 12:10 AM
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RE: Pacer 70 build (from Big Tee Racing)
Cobus,
Yesterday I was running with a fuel tank not the IV bag, no trouble with the engine, it was pulling really well though I did find when I got home my bolts holding on the carb were working their way loose. It was just my steering that was not playing ball.
Cheers
Yesterday I was running with a fuel tank not the IV bag, no trouble with the engine, it was pulling really well though I did find when I got home my bolts holding on the carb were working their way loose. It was just my steering that was not playing ball.
Cheers
03-28-2011, 04:57 AM
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RE: Pacer 70 build (from Big Tee Racing)
looks great will be a fun boat when the water gets alittle chop on it i love big boats and big water lots of fun
03-28-2011, 06:46 AM
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RE: Pacer 70 build (from Big Tee Racing)
ORIGINAL: intenserapture
Cobus,
Yesterday I was running with a fuel tank not the IV bag, no trouble with the engine, it was pulling really well though I did find when I got home my bolts holding on the carb were working their way loose. It was just my steering that was not playing ball.
Cheers
Cobus,
Yesterday I was running with a fuel tank not the IV bag, no trouble with the engine, it was pulling really well though I did find when I got home my bolts holding on the carb were working their way loose. It was just my steering that was not playing ball.
Cheers