- Jun 26, 2022
Hi everyone i just joined and i am womdering what the hp gain is for a 4g63 dohc on a 4g64 sohc wide block power gain is. Thanks for your time
False.. The 4g64 sohc is super thin between the crown and the top ring. This is where the piston is weak. All of the turbo dsm pistons are more than double the thickness in this area. Maybe he had something different. Perhaps a 6 bolt version. Tell your boy to get a pic and post it up. Here is a pic of a 4g64 piston from a 2g sypder gs and a pic of it compared directly to a stock replacement 1g turbo piston. The last pic is a stock 2g turbo piston from a 99 gsx.I've got a buddy that 4g63 dohc head swapped a 4g64 this summer, running a 16g at 11psi. He compared a 2g turbo piston to the 4g64 piston.....and the ring lands are identical. Say's it a heck for a bit more peppy then the 4g63 actually, very notice-able difference. He's been in the dsm game since the early 2000's and has swapped almost everything under the sun damn near, currently has a 4g63t swapped smart car that eats hellcats for breakfast and a few 80's colts 4g63 swapped as well.