Engine Kaboommmm... A question to answer...

That is caused by detonation. Can happen when driver was blasting with low fuel causing a lean condition. Detonation then blew the gasket. Water goes into the engine. Then hydrolocked the engine.
 
RSI said:
That is caused by detonation. Can happen when driver was blasting with low fuel causing a lean condition. Detonation then blew the gasket. Water goes into the engine. Then hydrolocked the engine.

yeah.. I sort of suspected hydrolock caused the sleeve fracture.. but I didn't arrive at HOW water got ingested.

Though I think the answer (by the inital poster) was overrev or something, which in conjuction with a skimmed head, caused valve to hit piston face, break off, and do the other damages.
 
RSI said:
That is caused by detonation. Can happen when driver was blasting with low fuel causing a lean condition. Detonation then blew the gasket. Water goes into the engine. Then hydrolocked the engine.

after the blown engine replaced with b16a, then the owner went to dyno it using the same ecu (mugen chip) n the afr reading is very good (12.8) consistent from 3k-8k rpm.

lets say if he use this ecu on b18cr, will it make a big different on the afr?
 
hattech-v said:
after the blown engine replaced with b16a, then the owner went to dyno it using the same ecu (mugen chip) n the afr reading is very good (12.8) consistent from 3k-8k rpm.

lets say if he use this ecu on b18cr, will it make a big different on the afr?

I don't claim to be a specialist or pro with tuning, but from my opinion....

Of course it will! 1.8 litres similar setup of other parts will have more pumping capacity than a 1.6 as revs climb, which is why it's offset by the rising rate adjustable fuel pressure regulator, when you start using 1.8 Ecus on 2 litre engines.

Some B20B setups run on the B18CR ecu, but without an rising rate Adjustable Fuel Regulator pushing more pressure into the fuel rail, it will run lean.

Mugen chip is simply a remap of the original ECU settings based on input from the Map and other sensors, so naturally, chipping isn't as accurate for a top-notch tune of a full tweakable ECU/piggyback. It's also dependent on the fact whether the chipped ecu runs in closed or open loop, but that's for part throttle only, as WOT usually makes the ECU (AFAIK) refer to the lookup tables (other word for the fuel/ignition map) exclusively.
 
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closed loop for cruising n open loop is for WOT if not mistaken...
closed loop get the value using the sensors while open loop get the value from map table... or the other way round... hehe
 
hattech-v said:
closed loop for cruising n open loop is for WOT if not mistaken...
closed loop get the value using the sensors while open loop get the value from map table... or the other way round... hehe

You're right.. I don't usually remember this, so I looked up google in case.

Yeah.. closed loop means that it gets sensor readings, apply fuel.

open loop means that lookup table + 02 sensor = fuel + fuel corrections, apply fuel.

Still, how much psi did you guys run the fuel pressure regulator, when the mugen ECU on the B18CR?
 
shiroitenshi said:
You're right.. I don't usually remember this, so I looked up google in case.

Yeah.. closed loop means that it gets sensor readings, apply fuel.

open loop means that lookup table + 02 sensor = fuel + fuel corrections, apply fuel.

Still, how much psi did you guys run the fuel pressure regulator, when the mugen ECU on the B18CR?

standard psi using standard non-type r fpr... not adjustable one.
 
hattech-v said:
standard psi using standard non-type r fpr... not adjustable one.

Wah.. and you actually use the ECU on the B18CR? Shouldn't have that resulted in random detonations?

If I'm not wrong, the type R fuel tank pump and the type R fpr results in a higher pressure than the stock B16A, that's why they can use same cc injectors, in conjuntion with slightly tweaked fuel/igniton maps for the 1.8block.

Well.. RSI might just be right with his theory then.
 
shiroitenshi said:
Wah.. and you actually use the ECU on the B18CR? Shouldn't have that resulted in random detonations?

If I'm not wrong, the type R fuel tank pump and the type R fpr results in a higher pressure than the stock B16A, that's why they can use same cc injectors, in conjuntion with slightly tweaked fuel/igniton maps for the 1.8block.

Well.. RSI might just be right with his theory then.

i think type r fuel pump is the same with other b or even sohc fuel pump...
but not sure about this...
 
Actually, I know the 'R' run higher pressures at the rail, because measured before.. around 50? I'm guessing it's because of the pump & the fpr, but it could just be the fpr... come to think of it, I've never seen anyone try a type R tank conversion for the EK9/DC2... hehehe.. I think you might right on on the fuel pump thing..

Anyway, one of the guys almost wreck his engine (B18C ecu on B20B engine) simply because the fuel pump contacts was dirty (not enough pressure)... luckily he noticed the knocking, and he's using forged rods, so didn't really damage the engine.
 


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