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Standard Valves

MR331307

By MR331307,
in Engines & Forced Induction

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MR331307 Experienced

MR331307

Posted
Posted (edited)

Im very pissed off at the moment

My race engine Has SNAPED a valve UNDER THE COLET AND RETAINER DROPING THE VALVE Bending it smashing the Head and Putting a hole through a New forged piston which has done 15 mins work of running in on the dyno.So much for a Race motor lasting.This just proves that ANYTHING CAN HAPPEN with any motor.I have organised a New Piston and Head for now.I carnt believe it happened.

I carnt blame the people who setup the Head either as SHIT happens.But still couldnt believe what i seen

Ill post photos tomorrow but looks like someone got a nail gun and shoot the Valve through the piston.

f**kEN GETS ME ANGRY AFTER 4 NIGHTS OF 16 HOUR SHIFTS OF WORK but yeah shit happens and like i said before Anything can happen so yeah

Does anyone know how much of a spring load can the Valves hold.I have tommie type b springs with 272 @ 11.5 lift cams.Anyone else had any problems

Edited by MR331307
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T04GTR Grand Master

T04GTR

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Posted

thats pretty boring : sory to hear

valves them selves are very strong. as theres usaly only about 80-120lb presure at the seat.

my work has recently seen that titanium retainers n shit arnt all trhere cracked up to be as it droped a valve at 9grand coming onto the main straight at oran park :P

they fatige badly and just snap. say 10k worth of driving.

what retainers are you using. and are the springs not "stacking solid" at full lift?

there must of been a fault with the retainer/collet or a fractured valve.

or they could not of been propery instaled.

all of wich are a posibility

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MR331307 Experienced

MR331307

Posted
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Posted
thats pretty boring : sory to hear

valves them selves are very strong. as theres usaly only about 80-120lb presure at the seat.

my work has recently seen that titanium retainers n shit arnt all trhere cracked up to be as it droped a valve at 9grand coming onto the main straight at oran park :P

they fatige badly and just snap. say 10k worth of driving.

what retainers are you using. and are the springs not "stacking solid" at full lift?

there must of been a fault with the retainer/collet or a fractured valve.

or they could not of been propery instaled.

all of wich are a posibility

well the retainers and collets are Tommies but the Valves are standard skyline.The Head was done @ a professional Head Machine shop in wollongong and yeah all i can say.I think it might be a faulty Valve as you will see tomorrow when i post PICTS.The valve Snapped under the Collet retainer area.The Springs are not BINDING as the people who set it up checked over everything.

I think its a faulty valve.

I just needa know what sort of Power,CAM lift,Springs the standard Valves are able to hold to and what valves do people use when into this performance area For drag Cars/Street

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