Lifetime Premium Member
Join Date: Feb 2008
Location: PuebloWest, CO.
Re: Forged Piston Opinions...
First problem was the day I received it - one straight plug head, one angle plug head. I ended up with two blown head gaskets 6 months out of warranty, but less than 8,000 miles on the engine (crappy Engine Master brand head gaskets), I then ended up with a couple of broken valve springs.
The balancer came apart a couple of years ago (Professional Products unit), and I had to replace the heads about 2 or 3 years ago (Pro Comp heads with the spark plug holes machined too deep - caused half of the spark plug threads to be exposed in the combustion chamber, which resulted in carbon buildup on the threads - that caused pulled threads on 4 of the cylinders). When I pulled the heads, I had two more broken valve springs (the builder assembled bare Pro Comp heads for this engine).
So, this engine has been problematic since I got it.
Seams test fitting, indexing spark plugs and bench fitting could have solved a lot of your problems right from the start. That and as already said the upgrading to better gaskets and balancer from the start. The broken valve springs means the valve train was not happy and the springs where most likely not right for the camshaft. The other thing is what block was used? is it a one piece rear seal block? those are internal balance in front and external in the rear and most times the balancer and fly wheel or flex plate are balanced with the rotating assembly because nothing is ever right off the shelf. This is why good builders blue print the engine and test fit more then once, plus double check the specs and verify every part they are using. Hence why some builds take longer then others, attention to detail. just my 2 cents.
78 Malibu, 402, eddy heads, 174 B&M blower, th350, holley sniper EFI, 9" 3:70, 26X8.50-15 slicks.
69 VW baja 1679cc. stick shift toy.
96 chevy 1500, tow vehicle.
03 yz85 fun bike.
04 scion XB daily driver.