Jimmy is a super stand up guy, that I know for sure. I also know Kenny who tunes there and he provides a really safe tune and is also one hell of a wrench. Good luck dude

 

I'm not kidding actually and if the guy behind the keyboard is worth 2 cents there will be no problem. Check out the newest video we will be posting as soon as Jarrod gets it up. Exact same piston design in an engine that's seen STUPID abuse, too lean AFR's, broken oil pump etc. No reason for the piston to get burnt other than poor tuning.

 

Amen to this . Dont be part of the problem be part of the solution. And hopefully this matter will be solved.

 

this issues is not about whether the thin edge survives in a perfectly tuned engine. its about what happens when shiiit happens.

bad tank of gas. vac line popping of fuel regulator. connector popping off cam sensor, injectors clogging. all these things and more take out perfectly good/tuned engines.

then theres the scenario where the detonation is brief and doesnt damage the piston because the piston doesnt have any thin edges just waiting to get burned. . or in your engines case the same brief detonation breaks off that thin piece of piston and ruins the pistons, block, and head. doesnt seem worth the risk to leave that edge when it takes all of about ten minutes prep time to remove them.

 

What pistons are those?

 

Manley.

 

I built engines with wiseco and CP that both had this thin lip. I of course ground the lips down before use.

 

Do you grind the electrodes off the spark plugs too, just in case?

 

This is why my car was sent to Buschur-so they do the build and tuning.

 

Logical reference. Can you point out a single downside to removing the fragile and sharp edge?

 

Difference in material as well - aluminum that is susceptible to cracking versus steel that is not as susceptible.

 

Also, I have seen detonation damage the thin edge on pistosn a few times without any noticeable damage to the plugs.

I've always looked at htose areas and wondered why manufacturers design their pistons with these big *** valve reliefs leaving very little material at the edge.

The valve reliefs on Cosworth pistons are very small, like a stock piston. Seems like a good feature to me, at least for people using stock sized valves and not running crazy lift. Maybe the Cosworth's don't come up to the top of the block like the factory pistons?

 

you obviously have no motor building knowledge whats ever. but to take the comment seriously you can buy race plugs that dont have electrodes or have an electrode that does not protrude into the chamber and therefore cools better with less chance of causing detonation. at 40-60 per plug nobody uses therm. you can also file the sharp edges off your cheap plugs to make them less likely hot spots. most plugs these days come well rounded.

there is absolutely no downside to removing the lip on the pistons before use.

Anyone who wants to argue about it will not get an argument from me. I dont argue with stupid. So if you want to be stupid have at it.

 

I wouldn't say nobody uses those plugs, I've been running them for years.

As for the pistons, I'm not arguing that the thin spot can cause a hot spot and the thin spot will be the first thing to go, well the plug may go first but it's a toss up. Figure the OP blew 1 head gasket, one soft plug, one water pump gasket, broke multiple plugs.....all of that should have been a sign to have the car tuned by someone else or figure out the problem. Finally after this last time the pistons were damaged. I still say, tune the car correctly.

 

the fact remains, if mild machining is needed for use, then why not use surface charge plugs as well ? What is really is your point in argument? I know what it is.. . It's to raise BR's blood pressure, very diabolical .