GH Pigma. VR4 Head + Forged Stroker..

[Anchor]

'81 GH Sigma

Bought this off a good bloke in bris about 9 months ago now.

Engine:
MPI G63BT 2.0 Single Cam

Exhaust:
3" Stainless from Exhaust Housing to 3'' Magnaflow Muffler, 3" exits out the back

Suspension:
Monroe Shocks, Kings Springs, Nolethane Bushes

Wheels:
1981 Spec Polished Peter Wherrett Specials with Whitewalls (+5 PWS's out the back.)

Modifications:
Balanced & Shotpeened Rods
Forged Ross Racing Pistons 30thou Over
Autronic SMC 1.4v Management with 1.9 chip
Twin MSD V6 Commodore Coils and Twin Ignitors
Turbosmart Plumb Back BOV 38mm
FMIC hidden and painted black with Polished Piping
VN Throttlebody
Custom Inlet Plenum
560cc Evo 7 Injectors
Bosch 044 fuel pump, surge tank, secondary pump.
Custom Highmount Steampipe Manifold (heatwrapped)
Garrett GT3076r BB Turbo 0.63 Rear Housing
Full 3" Stainless Exhaust with deleted Screamer Pipe
50mm Trust External Gate
Oil Cooler painted same colour as car
Braided Lines & Speedflow Fittings for All Fuel & Engine Oil Lines
Hydraulic Clutch Conversion
Button Clutch - Exedy 8 puck cushion button
JAP 5 Speed
Custom Tailshaft
Mitsubishi Scorpion Disc Brake Diff with 3.3 gears... Unsure on this one..
Autometer Oil Pressure & Boost Guage
ARP Head stud kit
Valve Springs
Cometic Head Gasket
Custom catch can setup.
NOW HAS STD QLD PLATES


Stereo Audio / Visual:
Clarion source Unit
JVC 6" Fronts

Proven Power:
221rwkw on 23psi (297.1rwhp) wheelspin on Dyno Pump fuel and a little octane booster

When i bought it.






My new plumbed back system i made after getting defected for atmo bov and catch can


The screamer


New coil position with new coils. Leads went from 200m long to about 30cm..


On a cruise up here in cq.





Shitty engine bay pic


And after 9 months of trying to figure out why it was doing this. Diagnosing everything i could (and lots of other people) could think of...


I got the shits, pulled it apart and found this.... Also cracked in 3 places and scored the bore.
Cause - jet valve head. no 3 jet valve wasn't sealing. Oil getting into fuel mixture = fail. Thats what i've been told.. ?? (the sealing part)



So now the game plan..

Buying Rad's SOHC head (Old fart i think on here?)
New block or sleeve the one i have and hone the other bores.. What should i do??
New rings, bearings, gaskets etc etc. Basically tidy everything up and freshen everything up.
Send flywheel down to NPC, redrilled to fit skyline style clutch (bigger). 600hp NPC custom clutch. 5 puck brass button.
Do something with the diff... I know i shouldn't weld it.. But only other option is a complete diff conversion :(

Heap of other small stuff also. I'll keep pics and update you's as much as possible.

Hoping to be back on the road in about 3 weeks.




Aaaand just so you guys know i don't do something half assed.. A pic of my el camino in all its glory :D

Now has a dead auto.. I wonder why... rofl

[redzone]

nice one! and fkn nice el camino! 69??

[Vulpes]

now thats what i call a sleeper

[Anchor]

nice one! and fkn nice el camino! 69??

Built 69. 70 model.

So i get away with lap belt for the passenger by 1 year haha.. Fkn compliancing....

[MR Bender]

one very cool pigma!!!
love it!!

[OLD FART]

Hey Jeri I'm very happy that my head is going to a good home you won't be dissapointed :D
Your Sicma looks fantastic :beer
Gheers
Rad

[panda]

Wow, thats one huge shopping list. Beautiful. Just luv it !
BTW, I hope your number plate doesn't refer to the car driving past in the first pic. :)

[thrash]

on that note, a word of advice.. use paint or photoshop to blank out your number plates before putting the pics up... your car can obviously still be found considering the uniqueness, but it'd require a bit more effort rather than handing them your head on a titanium platter

[WidebodyWoody]

especially with pics of a screamer pipe which is illegal in QLD and all other states from memory

[Anchor]

Meh, its plumbed back in now anyway. I got raped for it all over christmas..

+ Those pics are up on boostcruising, which gets way more traffic and attention than this site. No trouble yet?


Thanks for the kind words :D

[Alspos]

How exactly do you get done for a BOV with that screamer pipe hanging out hte bottom rofl

Welcome :D

[S0LJAH]

nice car mate very tidy engine bay which is where it all counts :D

[Anchor]

How exactly do you get done for a BOV with that screamer pipe hanging out hte bottom rofl

Welcome :D

You can see in one of the pics where i'm able to plumb it back in with 4 allen key bolts.. I done that about a day before i got done.

Hint for all you fellas out there. If a Black VE SSV ute with mags, tint, exhuast and lowering takes off from a set of lights...
DON'T put it in second, put the clutch in, hit the limiter and dump the clutch, proceeding to go past the (at this time unknown) unmarked cop car sideways billowing smoke..

6 points and $500 later... I've learnt from my mistakes lol

[thrash]

cops don't bother look UNDER the car, so they wouldn't see the screamer pipe.. they would see the bov as soon as the bonnet is up eh

i've stopped doing silly shit on the road..

i'll tell you what i find funny though.. sydney police have started doing "random" breath tests on tuesday nights, on all major roads leading out of the city..

how many people do they think go out to the city for a drink on a tuesday night??

[Anchor]

cops don't bother look UNDER the car, so they wouldn't see the screamer pipe.. they would see the bov as soon as the bonnet is up eh

i've stopped doing silly shit on the road..

i'll tell you what i find funny though.. sydney police have started doing "random" breath tests on tuesday nights, on all major roads leading out of the city..

how many people do they think go out to the city for a drink on a tuesday night??

I wish... The cops that pulled me up went right through everything. Underneath, brakes, even had one crawl under the back, dunno what he was looking for though.