What class is the .12 jae fall under

[BlueBlaster]

Hey there, I'm trying to find out what class the .12 jae rigger is and what engine class are allowed. I've looked at the impba rules but I seem to not see them. Also what class the 21 jae is in and engine class?

I'm trying to figure out where an 18tz motor falls under what class.

 

[Jeremy Linney]

.12 JAE would run as an A-Hydro with maximum of .129 ci engine

.21 JAE would run as a B-Hydro with maximum of .219 ci engine

I believe this is correct and I'm sure someone will correct me if not.

 

[MarkTanski]

Looks right, The .18 will have to race against the .21s

I don't know if Namba has a .12 class yet in IMPBA it is class A

NAMBA

1. Internal combustion glow engines:

Class Displacement

A 0 - 3.509 cc (0 - 0.21 cu. in.)

B 3.51 - 7.509 cc (0.22 - 0.45 cu. in.)

C 7.51 - 11.009 cc (0.46 - 0.67 cu. in.)

X 11.01 – 30.009 cc (0.68 - 1.80 cu. in.)

IMPBA

2. Internal Combustion Engine Classes

Class Cubic Inch Displacement Metric Class

A 0.000 thru 0.129 2.1 CC

B 0.130 thru 0.219 3.5 CC

C 0.220 thru 0.300 4.9 CC

D 0.301 thru 0.458 7.5 CC

E 0.459 thru 0.670 11.0 CC

F 0.671 thru 1.830 30.0 CC

 

[BlueBlaster]

Great info guys, very helpful, now I can buy the right outrigger. Thanks

I been wanting to built a jae and the 18tz seems to be a decent motor and It falls in my budget.

 

[Steve Smith]

Great info guys, very helpful, now I can buy the right outrigger. Thanks

I been wanting to built a jae and the 18tz seems to be a decent motor and It falls in my budget.

Not sure what you're planning on paying for an OS 18TZ. I just checked Tower and they were $170.....you'd still need to sort your own flywheel, etc. I think Glen Quarles sells the Novarossi 12 (IMPBA legal for A Hydro) for $175 (comes with flywheel, water cooling, barrel carb, etc). That might be a better way to go as there's lots of info (props, pipes, etc.) out there for the JAE 12/Novarossi 12 combination.

 

[misshydro]

Great info guys, very helpful, now I can buy the right outrigger. Thanks

I been wanting to built a jae and the 18tz seems to be a decent motor and It falls in my budget.

For now since theres no .12 class/A hydro. We where placed in B hydro . in a way sucks because a .21 is more powerfull and faster then .12's-.18's.. So I'm hoping next year clubs start having.12 A hydro classes since IMPBA aprove them this year.

 

[gooycheese]

I raced my whole first yr running a os cvr 12 in a blazzin 12 boat against all .21 boats (that was 2007). since that time I have run my .12 in only A Hydro classes. If it came down to it, I would let the tz.18 run against my .12 in a driver meeting vote.

 

[gooycheese]

Speed doesnt win races reliability does. those bigger boats gotta be able to run all the heats and they gotta be able to drive with a boat that is a little slower. If ya can drive a good line with a .12 boat it could be tough for a .21 to pass. I will just guess that most .21's are racing between 65-75mph. Most .12's i will guess should be 50-60mph maybe a little faster....... this is heat race not saw boats and there are exceptions to this for sure. In 07 when i raced my A boat against the B's , that boats top speed was 49mph, and it took a beating hitting bouys left and right. Some how the last race of the season that yr in B Hydro at our district championship race the boat took a third place ( It was the first time I had placed with a boat in any race). Just my opinion but if you can run a A boat in the B class and place you did awesome, since the B boat should be faster and should be easier to keep running............ damn little A boats are finicky

 

[Glenn Quarles]

Great info guys, very helpful, now I can buy the right outrigger. Thanks

I been wanting to built a jae and the 18tz seems to be a decent motor and It falls in my budget.

For now since theres no .12 class/A hydro. We where placed in B hydro . in a way sucks because a .21 is more powerfull and faster then .12's-.18's.. So I'm hoping next year clubs start having.12 A hydro classes since IMPBA aprove them this year.

I don't understand what you mean Miss Hydro...the .12/A has been a legal class in IMPBA for several years. Most places don't offer the .12 class, bit as more boats are built, more races will be offered.

Glenn

 

[BlueBlaster]

Well, there was a few at our races, just like you said the more that are built the bigger the class. I was going to run a 18tz in a jae 21. There is one that uses a pull start. I seen some miss Vegas with them seems to hit 40 50. I just don't want to pay the price for a 21 motor. I'm just wanting to get into the class and this engine seems to be up there with the 21.

 

[misshydro]

Well, there was a few at our races, just like you said the more that are built the bigger the class. I was going to run a 18tz in a jae 21. There is one that uses a pull start. I seen some miss Vegas with them seems to hit 40 50. I just don't want to pay the price for a 21 motor. I'm just wanting to get into the class and this engine seems to be up there with the 21.

Hay Blue,You can run a traxxas 3.3.. Rod sudjested that to joe to run in his rigger. It has a .20 size piston in it. and if you do some mods to it,from what I heard they scream. Ya Paul these dam little rigger are very finicky.Also had turnfin issues too. Took us a few tries to get mine to run on 50%. Plus Joe built a new light weight version for me. Just hoping to test it this week ,since were subpose to get weather in the 60's. Glen,The way I get it. If there a sporthydro classs then you will have a riggers class ,What Im trying to say if there a sport.12 hydro class then you have a A hydro.12 class. Like sport.21hydro class and you have B hydro=.21 riggers.. Since in our area doesnt have a sport.12hydro class=also A hydro ,you get tossed into B hydro. To me thats not fair! Going against bigger and faster riggers,plus try to drive our little riggers in there wakes...

 

[hydro rob]

all my riggers ran fine on 50% first time out..... We run our riggers in a .12-18 class but its a club race not official or anything. Mine runs with the 21 riggers here, when they come out to play.

 

[gooycheese]

The thing is if ya goto the races and race your .12 against the .21's enough people begin to realize these boats are pretty damn cool. Thats when the class will get bigger. cuz people will wanna race on a level playing field......

 

[Jeff Schindler]

If you are building a .21 you better consider a 5-port Nova from Glenn Quarles. You will not need to have the motor setup perfect, and it will still run well. Very inexpensive for the quality of motor you get. I'm not dissing the car engines, or the .12, they will work, but if you want an easy button, Glenn has them in stock.

Another option, would be one of these: http://www.reoraceway.com/phpBB3/viewtopic.php?f=5&t=1800

The seller is local.

 

[misshydro]

If you are building a .21 you better consider a 5-port Nova from Glenn Quarles. You will not need to have the motor setup perfect, and it will still run well. Very inexpensive for the quality of motor you get. I'm not dissing the car engines, or the .12, they will work, but if you want an easy button, Glenn has them in stock.

Another option, would be one of these: http://www.reoraceway.com/phpBB3/viewtopic.php?f=5&t=1800

The seller is local.

Glen did my some mods to my rossi.12 cobra air cool head botton and Rod Garaghty did the mods to my motor.

 

[Ron Olson]

The IMPBA "A" class as it presently is with a .129 max has been around for around 12 years now. The previous max size was .119. This came around to keep up with the .12's that were on the market at the time.

NAMBA if they wanted to could create a 1/2-A class where we used to know around planes as that being the .049-.051's.

 

[TCHedOff]

Our club allowed a .21 rigger to run against of .12 riggers, just so he could run his boat that day. Big Byron was there with his .12 rigger. It was great driving vs a faster boat... for me it was the best race of the season.

 

[BlueBlaster]

Wow this post took off, thanks for all the info. What I was planning to do was buy two 18tz, one is for my sport 20 Vegas and run the other in a JAE rigger. Since it falls in b hydro that's the one I'll get. Yes the 21 motor would be better but for the price of a 21 I can get two 18tz. From what I read they are fast motors when you have a good set up and I'm sure it can run with the 21's. And I'm just trying to get into more classes and experiment with these engines and i been wanting to get an outrigger.