Just saying, as usually a piston/plug would go first if lean. It's usually an impact of some sort that leads to a dropped/broken valve, or if somehow a collet/retainer came undone allowing the valve to drop

Always nice to be sure of a cause, so it wont happen again. the damage is always horrific. IMO it is the single biggest and worst failure you can ever see in an engine, as it destroys everything !

 

what do you mean by it's usually an impact of some sort!!??? yes of coarse me and my engine builder/tuner want to know 100% the cause of the damage don't want it to happen again !!! even more so with an rhs block !!!

 

ie. valve to piston contact, valve to valve contact ( multivalve engines )

Sometimes it can be a valve failure if a 2 piece valve, where the two sections are welded together, but I think most high performance valves used today claim to be 1 piece, so that shouldnt really happen.

Even minor contact from say an over-rev might give a slight bend in the valve but with no real obvious symptoms. Over time this will fatigue and fail
But I just cant see an instance of a lean condition causing a valve failure.

I completely destroyed an engine through slightly lean and too much timing during some mile runs, pistons completely cooked, blew a hole through the head/block interface due to detonation, and heated the valves to the extent they actually turned the flat heads concave ! like upside down umbrellas.

But all valves still remained intact.

 

thanks for the input stevie !!! anyway new goodies have arrived gtx55-94mm turbo, oliver pro billet rods, cp pistons, trunk mount water/meth kit, timing chain to suit rhs block, also going bigger cam with some more lift, rhs block will hopefully arrive next week !!!!cant wait cheers

 

That turbo is massive !!

 

yes turbo is very impressive here's some pics I got today next to the old bw s400 88mm !!! and a piston to valve pic cant see it but conrod is twisted !!! still waiting on block hopefully here in a few days everything is ready to go can't wait !!! cheers

 

hi just an update!! progress is slow short block is complete hopefully hassle free from now on !!! can't wait cheers

 

It's a tough looking block !

 

yeah that should hold her! nice.

 

who is the engine builder?

 

setup is being built by my mechanic /tuner russo performance in Sydney Australia !!! cheers

 

hi just an update new setup only needs a few little things to finish ready to start in a few days !!! then tune and back for xmas can't wait !!! cheers

 

hi not sure on boost level but so far tuning hit 1115.9 rwhp pick up car tomorrow !!!yeeehaaa

 

Money, lots of it.

 

I work like a dog 60hrs a week there Daniel to pay for it haha anyway picked up wagon a few days ago it drives awesome !!! tuning wise at 24psi we run out of fuel pumps @ 1148 rwhp and rising so it has been backed off a little will be stepping up fuel system in January to keep it safe and run 28 psi or so boost!!! cheers

 

Hope you enjoy your beast should be no expalnation work hard play hard time to crack some new times.
Happy New Year

 

Cool car,looks like a vauxhall omega from the UK. I like the way after some good mechanical carnage you're comin back with a bigger turbo and more power rrrrrargh!

 

What Cam did you have in here.

 

cam is just 232/234 something like that !!! anyway long awaited update finally got the wagon back to the track !!! went 9.000@156 first pass bit more boost went 8.92@158.95mph yeeeha this is with irs rear driven to/from track at 3850pds race weight will be hitting track in a few weeks time slip and just a phone vid !!!! cheers

 

It's flying for sure !!