NateLS1Mustang

iTrader: (2)

I am planning on rebuilding my LQ4. Going to punch it out to a 370ci, put 799s on it with a decently sized cam high 23x/low 24x +.600" lift. I want to use Wiseco +4cc domed pistons. I'm aiming for 11.5-.6:1 CR.

I can achieve that couple different ways but I'm wondering if I will have PTV clearance issues either way. With the pistons I want to use (and them being dome tops) and stock 799s with a .036 head gasket will get me to my desired CR I believe, but will it have PTV problems? Or I could go with a thicker gasket and instead mill my heads but thinking either way I might run into clearance issues? I'm not quite sure, just wanted some advice on the matter. Thanks for any information and/or advice.

98CayenneT/A

Even with the dished Lq4 pistons you still might run into ptv issues depending on cam due to the outside of the piston is raised and the exhaust valve could hit there, again depending on the cam. The dish does not give extra clearance on both valves.

Why not flat top pistons with reliefs. Heads milled .035" and .040" head gasket?

NateLS1Mustang

iTrader: (2)

Che70velle

iTrader: (6)

Throw up a part number for the pistons your looking at. Wiseco makes some dome units, with nice sized reliefs in them.

KCS

iTrader: (20)

Wiseco usually puts deep reliefs in their pistons so you probably will have miles of PTV clearance.

NateLS1Mustang

iTrader: (2)

Che70velle

iTrader: (6)

Those units have nice reliefs in them.

jdwtx85

PTS523A3 did you run that piston, any issues with fitting to the stock rods. We want to do the same thang.
thanks jason