A blown motor is never a good thing.  When the owner of this black Infinity G35 came to our shop with pieces of his engine block in his hand we knew a rebuild was in order.  After building a number of turbo VQ35 3.5 liter motors, we felt it was time to do something a little different.  Going over a number of options ranging from forced induction to exotic engine swaps it was decided that we would sleeve, bore, and stroke the original engine to get the maximum displacement possible, and keep it naturally aspirated.

A new engine had to be source since the original block, crank, and rods were no longer usable.  Once we received the engine it was stripped down and the block was sent to ERL to be sleeved.  While the block was getting redone we hand ported and polished both cylinder heads and the intake plenum to improve air flow, then a Brian Crower Stroker kit was ordered which includes the rods, pistons, and crankshaft.

Ported Cylinder Heads		BC Rods, CP Pistons, ERL Sleeved Block, BC Light Weight Knife Edged Crank

Close ups of the Sleeves and Crank

After assembling the motor the engine bay was prepared for it's new stroker transplant. In anticipation of much higher than stock power levels we then installed a Stage IV Competition Clutch and lightweight flywheel before bolting the engine back in it's place.
	Assembled motor moments before being reinstalled into the G35.

With the freshly rebuilt stroker motor assembled, it was then installed into the G35.  The Infinity was set up on our in house Dynapack  hub dyno for base tuning using GReddy E-Manage Ultimate.  The car was returned to the owner so he could put some miles on the motor to break it in.

With the motor properly broken in on the streets it was brought back to us for the final tuning.  After two hours on our Dynapack it achieved an increase of 101 horse power at 6500rpm and 98 ft lbs of torque at 4200rpm.  A very significant increase in power for a naturally aspirated motor.  What's even more impressive is the fact that the torque increase was consistent throughout the entire rpm range, providing gobs of torque with instant throttle response. 

 

JE Import Performance G35 VQ35DE Stroker motor