3.75L Build thread

[futurevr4man]

I decided to remake my thread, here is a little of the old info along with some updates:

my old build:
3.1L forged pistons, rods, and crank... 3sx built bottom end
19t's
550cc's
blow through with 3.75" z06 maf
tuning with maf-t and safcII
built transmission
spec stage 5 clutch


my current build:
bottom end:
6G74 block (94mm bore)
6G75 crank (90mm stroke)
oliver rods (from pampena)
ross pistons (from pampena)
thick wrist pins (from pampena)
clevite bearings

3.75L
short-block was assembled and balanced at pampena's


top end:
DR stage 3 heads with everything done to them
webcam 272 cams (i believe same thing as DR street grinds)

dual td05 20g's... td05 hotsides, td06 compressors
3sx td05 manifolds

1200cc injectors fed by dual aeromotive stealth 340LPH pumps
aeromotive afpr


driveline:
pampenas bell housing brace
SCE billet shift forks
upgraded output shaft (sadly idk what brand...)
LSD (quaife i think...)

my doubts with the trans are because i bought it from gene years ago before his reputation went to crap, and ray told me the output shaft was not 300M as i was told, so i have my doubts on the LSD as well.

stock driveshaft
stock transfer case
stock radiator and fans

has heat, ac, and powersteering. a STREET car with lots of power
*edit* my "goal" was to have a 4L engine. after talking to ray about it, some things were not realistically doable for me, and other things were not reasonable financially. ill live with my 3.75L

for those that are considering this, you cannot go bigger than a 94mm bore with the 72 heads because you get into the water jackets, which is obviously not a good thing. i was planning on having my crank offset ground so i could gain about 5mm of stroke, but financially it was unreasonable because the power gained would be minimal and it is not cheap to have done.


some old info:

turbos, mani's, oil and water lines, wastegates, and plug wires


old vs new:


setrab oil cooler:


my block:


piston:


can see some of the balancing on the crank here... more on this later:


box o' gaskets n' stuff:


tires at the ready:


TGE pump hanger:



billet oil pump gears (for higher revs):


my heads are Jrods old heads, and im not 100% that they are "DR" stage 3, because i think he had his own guy do these and had them flow tested etc. they are very well done. they have the titanium valve spring retainers, double beehive springs for higher reving, obviously ported and polished, 99 lifters, +1mm oversized valves, and the 272 cams:




i also had the headlift fix done to the heads by ray pampena. here is some info about the headlift fix:

"like ive said in the past, its not the head lifting rather the deck of the head is not strong enough to handle X cylinder pressure. that number gets lower the more the heads are milled.

there are 2 areas where the deck is not strong enough to keep it from bending. that is the deck surface near the center of the intake valves AT the gasket ring and the same on the exhuast side. if you look in the coolant pasages under the deck of the head you will see that this area is hollow and relies on just the thickness of the deck for strength. the rest of the sealing ring area is solid aluminum and has no flex.

if the studs were not strong enough and the heads were "lifting" there would be also leakage in other areas of the ring area ie. between cylinders and other areas where the head is also solid. the deck itself is not strong enough to stop from flexing in these 2 hollow areas.

my fix... machining out those hollow areas and installing aluminum stantions in those areas just benieth the head gasket ring and welding the areas back up. this leaves no more hollow area under the gasket fire ring that will flex out of the way and still has room for coolant in the area."