Previous Thread
Next Thread
Print Thread
Mega blocks, some different quality? #2389161
10/18/17 07:35 AM
10/18/17 07:35 AM
Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline OP
master
gregsdart  Offline OP
master

Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
I bought a mega block way back in about 2,000 (AD!)
Any body know of differences in quality over the years they were cast? I don't here much about some of the issues I have had, like cap walk and cylinder bank to bank flex? I got around both, ccw crank for the caps, no gasket, used silicone for intake sealing.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Mega blocks, some different quality? [Re: gregsdart] #2389173
10/18/17 09:11 AM
10/18/17 09:11 AM
Joined: Nov 2003
Posts: 1,825
NW Indiana
F
fbs63 Offline
top fuel
fbs63  Offline
top fuel
F

Joined: Nov 2003
Posts: 1,825
NW Indiana
IIRC Mopar had 3 or 4 different casting runs and 3 different places that machined the blocks. They should have added stiffing ribs in the valley and another set of vertical bolts to at least the center 3 main to solve these issues.

Re: Mega blocks, some different quality? [Re: gregsdart] #2389175
10/18/17 09:23 AM
10/18/17 09:23 AM
Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar Offline
master
451Mopar  Offline
master

Joined: May 2008
Posts: 5,399
Aurora, Colorado
I though some needed the lifter bore angle corrected?

Re: Mega blocks, some different quality? [Re: 451Mopar] #2389346
10/18/17 03:21 PM
10/18/17 03:21 PM
Joined: Jan 2004
Posts: 4,539
Motor City
6
6PKRTSE Offline
master
6PKRTSE  Offline
master
6

Joined: Jan 2004
Posts: 4,539
Motor City
My Hemi 4.500" Bore block is an 07'ish vintage. No casting or machining issues at all with mine during the machining process other then our machine shop complaining how they chewed up tooling & had to slow down the speed & feeds of all of our machines due to the higher/better nickel content within the cast iron. They were all amazed when compared to the 1000's of Dart/World & other aftermarket & stock blocks we machine.


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: Mega blocks, some different quality? [Re: gregsdart] #2389393
10/18/17 04:43 PM
10/18/17 04:43 PM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 19,304
Las Vegas
All of the Mega/World block I have used and been involved with ALL showed signs of cap walk and main bearing wear. The single best change we made was switching to a center counter weighted crank..But what do I know.


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Mega blocks, some different quality? [Re: Al_Alguire] #2389540
10/18/17 09:52 PM
10/18/17 09:52 PM
Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline OP
master
gregsdart  Offline OP
master

Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
Originally Posted By Al_Alguire
All of the Mega/World block I have used and been involved with ALL showed signs of cap walk and main bearing wear. The single best change we made was switching to a center counter weighted crank..But what do I know.

Same hear on the crank. My block has no extra stiffening ribs in the valley, and it sucked gaskets in so I went silicone, no gasket. I run injection, so if it leaks, it isn't as hard to deal with. Haven't had issues yet though.

Last edited by gregsdart; 10/18/17 09:54 PM.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Mega blocks, some different quality? [Re: gregsdart] #2389612
10/18/17 11:43 PM
10/18/17 11:43 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Offline
master
dvw  Offline
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Mine showed some metal transfer when I got the short block used. Mainly on the #1/#5 cap. Crank was out of balance over 50 grams on each end. It was rebalanced, the last freshen-up looked better. Never any other issues. did the metal transfer hurt anything? Main bearing needed replacement after 300 passes. been going strong another 200+. It is the later foundry marking. well over 10 years old. Holds good ring seal.
Doug

E1.jpgE3.jpgE4.jpg
Re: Mega blocks, some different quality? [Re: gregsdart] #2389977
10/19/17 07:28 PM
10/19/17 07:28 PM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 19,304
Las Vegas
I've broken two, both were the pre world versions does that count smile


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Mega blocks, some different quality? [Re: Al_Alguire] #2390128
10/20/17 12:57 AM
10/20/17 12:57 AM
Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
hemi-itis Offline
I Live Here
hemi-itis  Offline
I Live Here

Joined: Dec 2007
Posts: 12,587
Great Neck,LI,new york
Originally Posted By Al_Alguire
I've broken two, both were the pre world versions does that count smile


Not with the power your playing with!


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Mega blocks, some different quality? [Re: gregsdart] #2390639
10/21/17 01:42 AM
10/21/17 01:42 AM
Joined: Jan 2003
Posts: 19,304
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
I Live Here

Joined: Jan 2003
Posts: 19,304
Las Vegas
They were actually both the older casting ones as well. Non stiffening rib versions like DVM posted..Had to go back and look at the pics..


"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"






Powered by UBB.threads™ PHP Forum Software 7.7.1