vic jr. heads...big enough reliefs?

jammer84_03

New Member

Nov 30, 2003

468

1

0

Jun 29, 2008

#1

• Jun 29, 2008

• #1

well, i am switching out heads and going with a set of victor jr. heads. my only issues it im not sure if the valves are going to contact the pistons at all. right now i have speed pro pistons:
http://store.summitracing.com/partdetail.asp?part=TRW-8KH273CP30&autoview=sku

and a comp cam extreme hyd. energy series cam:

http://store.summitracing.com/partdetail.asp?part=CCA-35-351-8&autoview=sku

how would i go about finding out if im going to have clearance issues? and if i do, could i notch the piston reliefs? thanks in advance

 

lx93notch

New Member

Oct 10, 2007

24

0

0

coventry, rhode island

Jun 29, 2008

#2

• Jun 29, 2008

• #2

fill the relifes in the piston with clay. with the motor assembled turn it over slow a few times. pull the head off and look at the impression in the clay to determine your clearance

 

jammer84_03

New Member

Nov 30, 2003

468

1

0

Jun 29, 2008

#3

• Jun 29, 2008

• #3

ok....heads fully torqued? and about how much clay would you use, just a litle to see if it touches? and i should be able to cut the reliefs if it does make contact even with a hyper piston?

 

8

86bluecobra

Advanced Member

Dec 20, 2004

4,265

12

69

B.C. Canada

Jun 30, 2008

#4

• Jun 30, 2008

• #4

When I did mine I installed the heads with no gaskets. Spun oil pump with a drill and cranked engine over by hand. Then pulled off heads and measured the plastercine. I was fine but I do not have factory pistons. I have dished pistons.