I just want to share this. I have several 196cc and predators as well. I have a RWYB engine (hemi style predator) that has well over 300 dyno pulls at 8500 to 9200rpm. It also has 3 races on it, and the only thing that has happened to it is one pushrod broke, and they are stock. I guess what I am saying is I like them both.
Boring and pistons
- Thread starter Stephen115
- Start date
- Tags boring pistons
Not sure. Never dynoed it. Its just a long rod 3" bore Honda with 14:1 and 28.5intake and 25 mm exhaust valves. Using a black mamba cam with 1.3:1 roller rockers. I got a pz27 mikuni on it. It really runs strong in my opinion.
I have a 196cc motor set up almost identical and the 3" makes way more power. Seems like the long rod really helps these engines in the torque department.
I have a 196cc motor set up almost identical and the 3" makes way more power. Seems like the long rod really helps these engines in the torque department.
That's a good question.....
There are some blocks out there that are longer than normal.
There are even some stock looking rods that are longer than normal...
This is one of the reasons ARC came out with .010 and .020 over stock billet rods.
You can never be sure exactly what you have until you measure.
I am going with the assumption you need the extra .020.
If I don't it gives me wiggle room....
I can shave a piston down ( and lighten it a little in the process, and I can skin the deck on a block if required to take up more slack )
There are some blocks out there that are longer than normal.
There are even some stock looking rods that are longer than normal...
This is one of the reasons ARC came out with .010 and .020 over stock billet rods.
You can never be sure exactly what you have until you measure.
I am going with the assumption you need the extra .020.
If I don't it gives me wiggle room....
I can shave a piston down ( and lighten it a little in the process, and I can skin the deck on a block if required to take up more slack )
I talked to the local machine shop and he said the lowest bore he can do is 2.7~ which is good to hear. I priced some sleeves and for only $45 it's not a bad deal. If I get a 3" bore with sleeve I'm assuming I could keep the stock length billet rod I have now, that way I wouldn't have to mill the piston too much?
Sent my request to join Poboy
Sent my request to join Poboy
I understand, I use facebook to communicate with other racers in different area's of the country. I just weed through the 'crap" that's posted.. LOL. I don't know what Skype is though? I miss the "old" Bobs as well, there was ton's of info lost from there 
Call people and see them ( if they have skype also ).
Greatest thing since slice bread.
I often talk to people and see the kids grow that I might only get a chance to ever few years.
I would like to follow along with PoBoy's.
But there is something I don't like about all this new stuff.
Maybe its the lack of anonymity or the data mining that goes on to pay for them.
And in the end they offer nothing more to me than I could get from a forum like this.