Need expert help - front cylinders lean
Thread Starter
Teching In
Joined: Mar 2013
Posts: 16
Likes: 0
From: Canada
Need expert help - front cylinders lean LSX engine with custom EFI injection rails on high rise intake and Squash return fuel system.
Just destroyed 3rd engine
First was piston failure (wiseco) - front
Second was cylinder wall failure front -(diamond pistons)
Third both front pistons broke. New engine shop says ran lean (partial my fault drove after overheated after belts thrown off supercharger and water pump) Wieseco pistons
I'm not a pro anything - just trying to go very fast.
But I see a pattern with each engine failure being front cylinder failures.
I heard most problems are rear cylinders, so why are the front failing??
Also I have 2000 ID injectors!
These are my areas of question - any ideas?
tune - tuner said many parameters have to be manually changed for bigger injectors
squash fuel set up
fuel rail intake line location such that front cylinders are starving
pressure ie voltage or other sending problems
actual fuel filters
If you have a valid suggestions please let me know
Thanks poor boy
Just destroyed 3rd engine
First was piston failure (wiseco) - front
Second was cylinder wall failure front -(diamond pistons)
Third both front pistons broke. New engine shop says ran lean (partial my fault drove after overheated after belts thrown off supercharger and water pump) Wieseco pistons
I'm not a pro anything - just trying to go very fast.
But I see a pattern with each engine failure being front cylinder failures.
I heard most problems are rear cylinders, so why are the front failing??
Also I have 2000 ID injectors!
These are my areas of question - any ideas?
tune - tuner said many parameters have to be manually changed for bigger injectors
squash fuel set up
fuel rail intake line location such that front cylinders are starving
pressure ie voltage or other sending problems
actual fuel filters
If you have a valid suggestions please let me know
Thanks poor boy
Last edited by Allanski; Jul 21, 2016 at 08:17 PM. Reason: added injector info
three things to start with
Fuel:
How is fuel set up? Y to the rails then out to a regulator is optimal
Also: have you moved injectors around?
Test them and label their cylinders.
Airflow:
How is the air entering the cylinders? What is your set up?
Temp:
Doing anything special with steam ports?
Did failures happen at WOT? Is this a race set up?
What is your pump and fuel lines?
Maybe the whole fuel system is sub par and you keep finding the weakest link.
Fuel:
How is fuel set up? Y to the rails then out to a regulator is optimal
Also: have you moved injectors around?
Test them and label their cylinders.
Airflow:
How is the air entering the cylinders? What is your set up?
Temp:
Doing anything special with steam ports?
Did failures happen at WOT? Is this a race set up?
What is your pump and fuel lines?
Maybe the whole fuel system is sub par and you keep finding the weakest link.
