piston choice

[357warrior]

I have 2pistons a vertex. 40 over 10.25:1 and a je 83mm 12:1 which 1 should i go with the je requires a plate under the jug which i have. But both need rings. So question is which is my better choice. Also that vitos timing key would it work right with stroker kit i have.

 

[duneracerweston]

wait how you going to run a oem replacement piston in a stroker????? id go with the JE but it will take race fuel and re sleeved because its a stock bore piston

 

[357warrior]

I have a plate that was machined to go under the jug to accomadate for where the wrist pin was located and i have another jug setup for 83mm. I know runnin the 83 will take away displacement but im sure its prolly not that much anyone know what a 7mm and 83mm would be the 7mm and 84mm is a 397. I just want it to run better will the 12:1 add that much more than the 10.25:1

 

[duneracerweston]

ah ok i got it now id still run the JE but you still will need race fuel

12:1 will outrun the 10.25:1 setup for sure you shouldnt loose much displacement

 

[357warrior]

U think 93 with octane booster would be ok

 

[beastlywarrior228]

You cant run the tkming key on a piston over around 10.75-1

 

[duneracerweston]

You cant run the tkming key on a piston over around 10.75-1

why not? it dont make sence to me

 

[beastlywarrior228]

The key increases the chance of predetonation which is why their only a good match with the lower compression pistons

 

[duneracerweston]

No it don't predetination is before the spark plug fires it would not effect anything but the power output with a timing advance key

 

[beastlywarrior228]

Im telling you advancing the timing increases chances of a motor prodetonating if you use it on anything much over 11-1 youll probably need race gas.

 

[duneracerweston]

No it won't predetination is before the spark plug fires so it wont matter if its advanced or not if its gonna predetinate its gonna predetiate regardless of the advanced timing

 

[rappy'97]

11:1 is fine on 93 octane.

 

[duneracerweston]

11:1 is fine on 93 octane.

Agreed but beast is saying the advanced timing key it wont with 93

 

[rappy'97]

I do not agree with that statement. Not that it matters.

 

[duneracerweston]

http://www.nicoclub.com/archives/gasoline-octane-myths.html

Ignition timing has nothing to do with pre detonating

http://www.contactmagazine.com/Issue54/EngineBasics.html

 

[beastlywarrior228]

Talk to the 400ex guys or curtis sparks theyve been there and know a lot about the timing keys

 

[rappy'97]

A 400ex isn't a Warrior...

 

[duneracerweston]

A 400ex isn't a Warrior...

Yep yep

 

[beastlywarrior228]

Whatever im tired of talkin to you kids if you dont wanna listen fine

 

[87warrior917]

Whatever im tired of talkin to you kids if you dont wanna listen fine

Im with beast on this... You guys ever seen what predetination can do to a motor?