pistons

[Pit bull kinda guy]

Is it possible to put a 3.5 piston in a .21 engine

 

[hamz9561]

No the piston/sleeve combo is specific to a particular engine.

 

[Pit bull kinda guy]

what are ways i can make more power

 

[hamz9561]

Use a fuel with higher nitro content or get a new engine.

 

[Pit bull kinda guy]

The fuel percentage is 20% I'm running a team infinity sh.21 what would be the max percentage i could run safely

 

[hamz9561]

Without changing, a 25% fuel should be okay in most applications. To run a 30% fuel I can't remember if you need to add or remove shims under the head.

 

[Rolex]

You'll need to add shims for 30, but I've never found a reason to go above a good, brand name fuel at 20% as long as the engine is healthy and well tuned.

 

[hamz9561]

They say that when you get older, @Rolex, the memory is the second thing to go. I knew someone would help me remember...

 

[Rolex]

What did we forget? The last time someone asked me what was the second thing to go, I couldn't remember.

 

[ninnon]

As most other people have said, the piston and sleeve are specific to that engine. If you want to get more performance running a higher nitro content, or getting it ported would be your only options. But porting is difficult and expensive if you want to get someone to do it.

 

[hamz9561]

Porting/polishing is not something that should be tried by a DIYer. It's a specialized skill and should be done by a pro.

 

[ninnon]

Porting/polishing is not something that should be tried by a DIYer. It's a specialized skill and should be done by a pro.

Yes, that's why I said it's expensive if you want someone to do it.