dhpro

iTrader: (3)

So...5yrs ago I blew up my Avv and just getting around to fixing it. Seems I tore the #1 piston apart - melted the plug, leaned out most likely - on an uphill WOT run. Meth pump gave out...etc. Im going to get it running, but prefer not to go nuts on $.

Anyway, have new block and trying to decide best route. Ill prob reuse my MP122HH and most of the hardened internals (eagle crank & rods), but might like to go bigger cubes and more torq? 408 stroker? Im looking for ideas and suggestions and try and reuse as much of the parts as I can. Here's what was in it - made 555rwhp/550 torq:
CAm 222/228 on 115 LSA
Crank Eagle Stock
Heads All Pro chamber 66/236cc intake
Springs Patriot Gold BeeHive
Pistons Diaomnd - 4.005/1.162comp/vol -11 (4.06 overbore)
Rocker 1.75:1 full Roller/hyd Roller Harland Sharp
Rods Eagle
Valves intake 2x3135x4900, exh 1.6/313x4915
4l80e w Vig 2600

Atomic

iTrader: (42)

I would just do a set of forged pistons and reuse your other parts. The power adder (blower in your case) determines the output. No matter what that blower will make about the same power regardless of engine size.

dhpro

iTrader: (3)

Im not so sure the heads/valve/cam combo was the right one to be honest. Also cant seem to recall the compression (10.7 rings a bell - CORRECTION - it was 9.3) and wonder whats optimal? Should be closer to 10 or 11 with that blower?

dhpro

iTrader: (3)

The damage to #1

Atomic

iTrader: (42)

As much as you can get away with based on your fuel is the answer...

10:1 is a pretty common pump 93 blower SCR. You could get away with more on e85, meth injection, or race gas.

Yep, that's detonation no doubt. You might want to consider 9.5 or so then. Also make sure you are using the right heat spark plugs.

dhpro

iTrader: (3)

Think I can get away with that head/valve combination? I was gonna go to GT2-3 cam. Someone else suggested I sell the heads and get a set of aftermarket or reworked GMs from Richard @ WCCH?

Atomic

iTrader: (42)

Probably wont make a huge difference in the end, but better heads are always better. Total power is still going to be determined by how hard you push the blower, but better heads will lower the drive power of the blower so you see more net power.

Vortec350ss

iTrader: (20)

The cam and heads are likely fine. Looks like you have a larger than stock exhaust valve and a stock size intake valve. Typically I would recommend a larger exhaust duration, but this will work.

Any idea how much advance there is on this cam?

dhpro

iTrader: (3)

unfortunately no...I spoke with Magnuson yest and they were suggesting the GT2-3...its been a while but I recall plenty of guys having good results that cam.

What kinda power is your setup making? My weak point was the 10 bolt frankly and I'll prob address that as well.

dhpro

iTrader: (3)

Trying to pin down my setup, but looks like this so far - looking for feedback or suggestions:
LQ9 & MP122
GP2-3 Cam
Intake Valve: 2x3135x4900
Exh Valve: 1.6x313x4915
Pistons: Diamond - bore 4.005/1.162 comp/vol -11
Crank: Eagle
Rods: Eagle CRS6250B3D
Rocker ratio: 1.75:1 Full Roller/Hydraulic Roller
PushRods: comp GM OEM
Heads: AllPro
Flow #s
100 I 66 E 54
200 136 111
300 196 154
400 246 198
500 276 244
600 291 254
700 289 258
Flowed with a 4.060 bore
Chamber size 66
236 cc intake
Compression goal 10 to 10.2 and 14lbs boost