I have a problem, and need an advice.
There is the spec of my Motor First; 468 big block chevy, with 353049 stage 3 porting oval port head, 2.19-1.88 Severy duty Manley Valve, Matching Valvetrain - Hydraulic Flat tappet Camshaft (11-214-4) 305 duration and 575 lift (253 duration at .050), 1.509 dual spring, chrome moly retainer and 10degrés lock.
0.60 bored Speed hypereuthetic with one valve relief and .100 dome. Everything is balanced and blueprinted.
I run a too hot Radical cam for my compression ration, this cam ask a 10.5 CR, and I have a 115 cc chamber and a 9.5 CR. When I was started my motor on headers, i never heard the noise on the head...when I put my 50 flowmaster muffler, I heard a little noise from the 2 head...last weekend, We pull out the motor and open hit...some valve was hitting the piston...I really dont understand why...A guy from a speed shop near from me said to put 4 degré advance on my timing chain to help my motor (Cause I have a CR too weak than the cam need) He tell me everything will be ok, you have enough clearance between your piston and valve ( He said that because I have a 115cc chamber and only .100 dome piston). I really dont understand what was my mistake...I have to rebuilt the motor and put the timing chain to zero, or put larger head gasket (I was puting steel head gasket at 19 thousand), make a bigger groove on my valve relief...
I really dont understant and need help...why this thing was happening to me (I have some shim under the exaust spring)..
Someone can help me, give me some advice or tricks.... PLZ
How calculate the clearance on a hydraulic valvetrain engine to be sure I have the right clearance, What is the minimum clearance?, What I have to do, keep the 4 degrees advance or start the engine at Zero...
I forgot 2 thing, I have the right Comp cam push rod and 1.7 full Roller Rocker with Valve lash at the end of valve.
Thanks in advance everybody
There is the spec of my Motor First; 468 big block chevy, with 353049 stage 3 porting oval port head, 2.19-1.88 Severy duty Manley Valve, Matching Valvetrain - Hydraulic Flat tappet Camshaft (11-214-4) 305 duration and 575 lift (253 duration at .050), 1.509 dual spring, chrome moly retainer and 10degrés lock.
0.60 bored Speed hypereuthetic with one valve relief and .100 dome. Everything is balanced and blueprinted.
I run a too hot Radical cam for my compression ration, this cam ask a 10.5 CR, and I have a 115 cc chamber and a 9.5 CR. When I was started my motor on headers, i never heard the noise on the head...when I put my 50 flowmaster muffler, I heard a little noise from the 2 head...last weekend, We pull out the motor and open hit...some valve was hitting the piston...I really dont understand why...A guy from a speed shop near from me said to put 4 degré advance on my timing chain to help my motor (Cause I have a CR too weak than the cam need) He tell me everything will be ok, you have enough clearance between your piston and valve ( He said that because I have a 115cc chamber and only .100 dome piston). I really dont understand what was my mistake...I have to rebuilt the motor and put the timing chain to zero, or put larger head gasket (I was puting steel head gasket at 19 thousand), make a bigger groove on my valve relief...
I really dont understant and need help...why this thing was happening to me (I have some shim under the exaust spring)..
Someone can help me, give me some advice or tricks.... PLZ
How calculate the clearance on a hydraulic valvetrain engine to be sure I have the right clearance, What is the minimum clearance?, What I have to do, keep the 4 degrees advance or start the engine at Zero...
I forgot 2 thing, I have the right Comp cam push rod and 1.7 full Roller Rocker with Valve lash at the end of valve.
Thanks in advance everybody