Do you think its rich or lean......

[Paul@1320]

[venox22]

ahh not good, what car is that from?? Mini?? running what mods??

[Fabio]

Nos related

[Rickys'S]

Oh dear 1320

That looks very unfortunate, which brings me on to what oversized forged pistons are you going to be running?

I want the ones that FTR are running , but not getting any luck.

Any ideas or is your block ruined beyond a bore?

[Al]

It doesn't look rich OR lean to me.





























































It looks like a huge chunk of your piston is missing.

[Paul@1320]

Yup nitrous related, blocked fuel jet, so always make sure your injectors can cover what you're spraying.

We had another bullet ready to go back in Tue afternoon and we'll be back out next weekend at the Reline Rumble at Santa Pod.

I've got 2 sets of FTR pistons coming over Ricky, shall I make that 3 now??

[Rickys'S]

Quote: Originally Posted by 1320autos

Yup nitrous related, blocked fuel jet, so always make sure your injectors can cover what you're spraying.

We had another bullet ready to go back in Tue afternoon and we'll be back out next weekend at the Reline Rumble at Santa Pod.

I've got 2 sets of FTR pistons coming over Ricky, shall I make that 3 now??

PM sent

[smc]

It looks like injectors nozzles are blocked except one , therefore high pressured atomized fuel concentrating at one point . its unlikely material fatigue . Such failure usaully occurs too rich of fuel .

[Paul@1320]

I forgot to add that we run a 12.4 @108 with the piston like that and No3 piston cracked as well

[pocketrocketowner]

Typical failure due to pre-ignition detonation. The piston has melted because it got to hot so that means either a massive air leak led to a seriously weak A:F ratio or the builder got his sums wrong and had WAAAAY to much compression for the fuel used. Either way, someone needs to go back to basics on engine building engine prepping.......

[Paul@1320]

Quote: Originally Posted by pocketrocketowner

Typical failure due to pre-ignition detonation. The piston has melted because it got to hot so that means either a massive air leak led to a seriously weak A:F ratio or the builder got his sums wrong and had WAAAAY to much compression for the fuel used. Either way, someone needs to go back to basics on engine building engine prepping.......

Fuel jet was blocked on the wet nitrous system and the stock injectors couldn't supply enough fuel for 290hp 170 stock 120 nitrous