Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: Aftermarket RB Block [Re: JERICOGTX] #2382583
10/05/17 06:27 PM
10/05/17 06:27 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
I know a well known 10.5 heads up racer that did that with a aluminum block and had issues with ring seal and crankcase pressure on the data logger. He switch to a cast iron block and went faster work


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Aftermarket RB Block [Re: 10sec440] #2382592
10/05/17 06:48 PM
10/05/17 06:48 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Offline
"Little"John
pittsburghracer  Offline
"Little"John

Joined: Feb 2005
Posts: 20,116
PA.
I have to laugh out loud when I hear about bad ring seal on aluminum blocks


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: Aftermarket RB Block [Re: pittsburghracer] #2382995
10/06/17 03:19 PM
10/06/17 03:19 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Laugh all you want, I have heard the same results from many heads up west coast racer, power adders included work shruggy
80 to 130 HP loss(700 + and above HP) on engine combination with all the exact same parts being transferred from a iron block to a aluminum block with or without fill shruggy
Bottom line now is we have no good source of both types of RB or B block today, aluminum or iron whiney

Last edited by Cab_Burge; 10/06/17 03:19 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Aftermarket RB Block [Re: 10sec440] #2383283
10/07/17 02:53 AM
10/07/17 02:53 AM
Joined: Apr 2005
Posts: 2,128
Salt Lake City
C
camastomcat Offline
top fuel
camastomcat  Offline
top fuel
C

Joined: Apr 2005
Posts: 2,128
Salt Lake City
I have 6 rebuilds on my 572 aluminum World block, it leaks 0-2% and did after 142 passes with Predator heads. I also have a 604 Predator on a steel block, with 2 carbs and more camshaft. It won't keep up with the 572 with one because of weight. Not much more I can say. You won't make up for 150 pounds of weight, bottom line.

Re: Aftermarket RB Block [Re: 10sec440] #2385665
10/11/17 03:34 PM
10/11/17 03:34 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
Well we run an aluminum block in the heads up car and will take the weight saving ANY day over the minimal HP cost from any minor ring seal issue. We used both and there is a VERY VERY VERY tiny amount of difference in power. More than offset by the lower weight of the block. In fact a new Dart ALUMINUM block was just ordered for it a couple weeks ago as it will be going to a much shorter deck height for next year. Also ordered was another block for a S/G racer for the same reason, the weight. Everything will be transferred from the old 582, rotating assy etc and headed to the dyno. I don't expect to see more than a 5hp difference.


"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: Aftermarket RB Block [Re: 10sec440] #2385680
10/11/17 03:54 PM
10/11/17 03:54 PM
Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
F
fast68plymouth Offline
I Live Here
fast68plymouth  Offline
I Live Here
F

Joined: Jan 2003
Posts: 14,478
So. Burlington, Vt.
When it comes to a BB Mopar....... I'll take the 150lb weights saving from an aluminum block every time.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Aftermarket RB Block [Re: Al_Alguire] #2386092
10/12/17 02:48 AM
10/12/17 02:48 AM
Joined: May 2011
Posts: 625
Oakville, Wa
HOTMOPR Offline
mopar
HOTMOPR  Offline
mopar

Joined: May 2011
Posts: 625
Oakville, Wa
Originally Posted By Al_Alguire
In fact a new Dart ALUMINUM block was just ordered for it a couple weeks ago as it will be going to a much shorter deck height for next year.


I assume this is not a mopar block?


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Aftermarket RB Block [Re: 10sec440] #2386276
10/12/17 02:06 PM
10/12/17 02:06 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
Yes a Chevy deal..FWIW I have four engines all with aluminum blocks and wont go back to iron...


"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: Aftermarket RB Block [Re: 10sec440] #2386322
10/12/17 03:07 PM
10/12/17 03:07 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Online content
master
dvw  Online Content
master

Joined: Mar 2006
Posts: 9,791
MI, usa
My car has a very nice late Mega Block, 4.505" with bushed lifter bores. I'd love to have a nice aluminum block.
Doug

Re: Aftermarket RB Block [Re: Al_Alguire] #2386341
10/12/17 03:51 PM
10/12/17 03:51 PM
Joined: Sep 2009
Posts: 500
MD
JACK1440 Offline
mopar
JACK1440  Offline
mopar

Joined: Sep 2009
Posts: 500
MD
Hey Al, I haven't spoken to you. Finally got down the track once. Popped a rod cap off and beat up two bores as well as trashed a crank. Well... after investigation we found a oil system problem in my new aluminum block (sound familiar?) Turned out there is a feature off location which connected the intake and exit of the oil pump. Once it got rpm on it she starved for oil. Still working it out with the block manuf so I'll keep names out of it for now.

Re: Aftermarket RB Block [Re: dvw] #2386745
10/13/17 11:15 AM
10/13/17 11:15 AM
Joined: Feb 2006
Posts: 784
Liverpool, NY
S
SILVER67 Offline
super stock
SILVER67  Offline
super stock
S

Joined: Feb 2006
Posts: 784
Liverpool, NY
Originally Posted By dvw
My car has a very nice late Mega Block, 4.505" with bushed lifter bores. I'd love to have a nice aluminum block.
Doug


Have the aluminum 4.5 bore version of your iron World block in the basement.
Thing can't even weigh 150.
Mike

Re: Aftermarket RB Block [Re: 10sec440] #2386782
10/13/17 12:07 PM
10/13/17 12:07 PM
Joined: Mar 2006
Posts: 9,791
MI, usa
dvw Online content
master
dvw  Online Content
master

Joined: Mar 2006
Posts: 9,791
MI, usa
Mine isn't a World, It's a late Mopar Mega Block. 270lbs
Doug

Re: Aftermarket RB Block [Re: 10sec440] #2386816
10/13/17 12:38 PM
10/13/17 12:38 PM
Joined: Jan 2003
Posts: 13,318
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
I Live Here

Joined: Jan 2003
Posts: 13,318
Marion, South Carolina [><]
I have a World cast iron hemi block in the shop and holy crap is that thing a tank!

My KB hemi block is about 140 lbs if I remember right. I'll take the aluminum block all day every day over cast iron.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: Aftermarket RB Block [Re: an8sec70cuda] #2386822
10/13/17 12:49 PM
10/13/17 12:49 PM
Joined: Jan 2003
Posts: 2,289
NE Ohio
DoubleD Offline
top fuel
DoubleD  Offline
top fuel

Joined: Jan 2003
Posts: 2,289
NE Ohio
World cast iron hemi block is 325+ pounds its a hefty thing

Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1