Well I finally got around to removing my broken pistons.

Results- Cyl. #1 Cracked, #2 Good?, #3 Cracked twice, #4 Broken Completely






I was running a "standard" HRC Stage 2 at 6-7 psi max boost (never went over that). My guess is fuel starvation caused by the old Cartech FPR or inadequate flow from the fuel pumps. The worst damage is on the cylinders at the far end of the fuel rail. I had audible knock, especially when the FPR decided to change idle fuel pressure to 60-80psi at random.
x(
Anyways, I think bigger injectors would have helped alot. Opinions?

Wow. All i can say is, Maybe a fuel pump would help. Or bigger injectors. And i think that *small* area you pointed out just could be by chance det.. :) :) good luck man. Time for bottem end kit. Stroker anyone?

Dan,
god damn.... your piston are messed up. I knew it was bad, but didn't know it was that bad. and how the hell you crack a piston twice...hehehehehe

Good to hear the rebuild process is finally moving along. Got the HRC parts yet?

Let me know when you need a hand putting that shit back.

lol- I love that big scraped spot on the piston skirt. I guess that's what happens when you try to drive it for 5000 miles after blowing the piston.
:+
Got all the important parts in. Just need a couple gaskets from satan, machine shop should be done with the block by this weekend. So yah, next week- gonna put it back together finally!

hey guys, whats your # i might be free want to come over and give a hand if so/ or watch if u dont need me... how much did u spend on the machine shop dan/ what are u getting put in/done at the shop?



Michael 99gs
Mods:
Hrc Stage 2
S-FMU
315cc injectors
Crane HI-6DI2
Greddy Type S Bov
VC-2
Road Race Catch Can
Greddy Profec B & Switch
Apexi WS Catback
Super Afc
Autometer Boost, electric fuel, Egt, Tranny Temp Gauge & Cooler, Air/Fuel Light & Digital
Tokico Adjust Struts
Eibach Pro Kit Springs
Front & Rear Upper Bar
CarCraft Interior
Sound System= Bring it On

I went to the same place Jamesman did- HomeTown Auto. They're doing bore&hone $55, Hot tank $35, and Mag (find cracks) $10... $100 total. I'm going to make Jamesman blueprint and assemble the shortblock with me, then you guys get to put it back in for me. hehe
;)
I'll email you my fone number.

Kaiser- I have a new shiny Greddy exhaust, A/F, and EGT ready :) No more break engine.

what city

Skrilla,
santa Fe springs. Down the street from RRE. hopeing to see your ass there. Haven't seen you since the DSM meet about 2 years ago.

Dan,
A shiny Greddy. what type. Should have gone with a apex N-1 :P more flow....:P
its all good though.

don't gorget to order a better exhaust system. I think that contributed to one part of your detonation problem. too much backpressure caused the engine to get hot. And not having an EGT, A/f also helped too.