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#2381007 - 10/02/17 10:38 PM Aftermarket RB Block
10sec440 Offline
pro stock

Registered: 01/19/03
Posts: 1245
Loc: Mission BC
Hello,has anyone heard if there will be an aftermarket RB iron block made again in the near future? The Muscle Motors one looked promising but I've heard they went out of business and were bought out. The new people that took it over have a facebook page, and are taking money with an 8 week delivery time frame. Under the circumstances I see that as a gamble.I guess I could use Indy but they are $3800+ and you have to pay extra for billet caps and finish machining from what I understand on their website. I understand the days of a $2600. RB is long gone, but I find it hard to believe there is no market for something half affordable to the average racer. Thanks in advance.
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10.15 at 130MPH Pump gas 440,3400lbs.

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#2381039 - 10/02/17 11:37 PM Re: Aftermarket RB Block [Re: 10sec440]
Superfreak Online   content
master

Registered: 11/08/08
Posts: 3599
Loc: the great wet north
It's going to take a lot of looking, plus with the Canadian peso you will pay dearly if can find one.
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#2381079 - 10/03/17 01:28 AM Re: Aftermarket RB Block [Re: 10sec440]
AndyF Online   content
Too Many Posts

Registered: 01/20/03
Posts: 24377
Loc: Oregon
If it was me I'd call the guys at Best Machine and see what they tell you to do.

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#2381082 - 10/03/17 01:30 AM Re: Aftermarket RB Block [Re: AndyF]
GY3 Offline


Registered: 12/13/13
Posts: 2400
Loc: Wichita
Have you checked with Keith Black? shocked
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'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's
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#2381089 - 10/03/17 01:48 AM Re: Aftermarket RB Block [Re: 10sec440]
10sec440 Offline
pro stock

Registered: 01/19/03
Posts: 1245
Loc: Mission BC
I have the peso's covered, but it seems they are made of unobtainium!
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10.15 at 130MPH Pump gas 440,3400lbs.

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#2381093 - 10/03/17 02:53 AM Re: Aftermarket RB Block [Re: 10sec440]
tex013 Offline
top fuel

Registered: 03/27/09
Posts: 1763
Loc: Sydney,Australia
Yeah a lot of us feel that pain
Funny but a mate is working up to buy a new block/short motor. A 409W chev aluminium block .
Huge demand for those 409s i guess
Dang canadian peso - we have aussie peso's . Don't get me started on freight

Tex
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#2381266 - 10/03/17 12:43 PM Re: Aftermarket RB Block [Re: 10sec440]
CMcAllister Offline
top fuel

Registered: 12/30/05
Posts: 2395
Loc: Fulton County, PA
Tony is making it tough to try to do anything serious and remain loyal at the same time. Aftermarket is not picking up the slack.

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#2381294 - 10/03/17 02:24 PM Re: Aftermarket RB Block [Re: CMcAllister]
fbs63 Offline
pro stock

Registered: 11/17/03
Posts: 1252
Loc: NW Indiana
Indy's blocks are 5k now. You can call Chicago Connection for an iron block. They are a distributor of the block MM was selling.

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#2381436 - 10/03/17 07:29 PM Re: Aftermarket RB Block [Re: fbs63]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: Bend,OR USA
Originally Posted By fbs63
. You can call Chicago Connection for an iron block. They are a distributor of the block MM was selling.

I ordered a compact graphite iron 4.500 bore wedge block from Billy Mitchells (SP?) company when they owned or where in partners with World Products, I waited a long time before they cancelled making them due to not having enough orders.
I had placed a order with Dave Koffel for a Koleno high nickel cast grey iron block and ended up cancelling it when he called to say it was ready to ship, stupid me realcrazy One in the hand is way better than one on order up
I placed another order with Dave later two years later and got it several years later up Dave had said that casting iron Mopar race blocks was a black art according to what he had seen and heard while working at Chrysler and seen later on both the Koleno and World iron blocks work
I have talk to the guys at Chicago Connection for another iron block but I think I will wait until they have several bunches machined and in use before stepping forward on them work twocents


Edited by Cab_Burge (10/03/17 07:31 PM)
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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2381533 - 10/03/17 10:20 PM Re: Aftermarket RB Block [Re: Cab_Burge]
fbs63 Offline
pro stock

Registered: 11/17/03
Posts: 1252
Loc: NW Indiana
The casting problem has always been they want to use one casting for a Hemi or a wedge block. You would think they would have figured out by now they need two different patterns and core molds.

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#2381596 - 10/04/17 01:00 AM Re: Aftermarket RB Block [Re: 10sec440]
markz528 Offline
master

Registered: 01/20/03
Posts: 3411
Loc: Milford, OH
I have a (The Block) that I bought from Muscle Motors. Although MM was involved in testing the blocks, they were not making them. The sourcing of these blocks has not changed. They are available from several vendors.
_________________________
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 13.300 @ 101.75 mph
69 GTX (clone) - build in progress......

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#2381600 - 10/04/17 01:18 AM Re: Aftermarket RB Block [Re: markz528]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: Bend,OR USA
Have you used it yet? If so how was it and how much extra machine work was needed to make it useable for your deal?
Last thing is it a RB or B wedge or a Hemi block and what size bore was it to start with?
I'm still in the market for another good cast iron, not aluminum, race block work
Thanks in advance for your help on this up
_________________________
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2381875 - 10/04/17 03:35 PM Re: Aftermarket RB Block [Re: Cab_Burge]
markz528 Offline
master

Registered: 01/20/03
Posts: 3411
Loc: Milford, OH
Originally Posted By Cab_Burge
Have you used it yet? If so how was it and how much extra machine work was needed to make it useable for your deal?
Last thing is it a RB or B wedge or a Hemi block and what size bore was it to start with?
I'm still in the market for another good cast iron, not aluminum, race block work
Thanks in advance for your help on this up


Its a RB 505. I went 0.030 over as it will be a street engine.

Can't comment on the machining as I bought it as an assembled shortblock. I hope to get the motor fully assembled and on the dyno by the end of the year or very early next year.
_________________________
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 13.300 @ 101.75 mph
69 GTX (clone) - build in progress......

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#2381890 - 10/04/17 04:09 PM Re: Aftermarket RB Block [Re: markz528]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: Bend,OR USA
Thanks for the help up
I'm going to assume that it is bored to 4.350 with a 4.250 stroke, is that correct?


Edited by Cab_Burge (10/04/17 04:10 PM)
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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2382200 - 10/04/17 10:55 PM Re: Aftermarket RB Block [Re: markz528]
10sec440 Offline
pro stock

Registered: 01/19/03
Posts: 1245
Loc: Mission BC
Originally Posted By markz528
I have a (The Block) that I bought from Muscle Motors. Although MM was involved in testing the blocks, they were not making them. The sourcing of these blocks has not changed. They are available from several vendors.


Which vendors? Thanks.
_________________________
10.15 at 130MPH Pump gas 440,3400lbs.

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#2382401 - 10/05/17 11:53 AM Re: Aftermarket RB Block [Re: Cab_Burge]
markz528 Offline
master

Registered: 01/20/03
Posts: 3411
Loc: Milford, OH
Originally Posted By Cab_Burge
Thanks for the help up
I'm going to assume that it is bored to 4.350 with a 4.250 stroke, is that correct?


I didn't put it in the post cause I didn't want to guess but quite sure that is correct. It is a 4.25 stroke - stock bore 0.030 over.
_________________________
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 13.300 @ 101.75 mph
69 GTX (clone) - build in progress......

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#2382403 - 10/05/17 11:54 AM Re: Aftermarket RB Block [Re: 10sec440]
markz528 Offline
master

Registered: 01/20/03
Posts: 3411
Loc: Milford, OH
Originally Posted By 10sec440
Originally Posted By markz528
I have a (The Block) that I bought from Muscle Motors. Although MM was involved in testing the blocks, they were not making them. The sourcing of these blocks has not changed. They are available from several vendors.


Which vendors? Thanks.


Don't quite remember but if you search the subject here on Moparts they have been listed.

I do believe Chicago Connection was one.
_________________________
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 13.300 @ 101.75 mph
69 GTX (clone) - build in progress......

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#2382405 - 10/05/17 12:03 PM Re: Aftermarket RB Block [Re: 10sec440]
JERICOGTX Offline
master

Registered: 01/20/03
Posts: 7971
Loc: MN
Just curious, as to why bother with a iron block when aluminum blocks are available as a option? I can see if you are running a class that requires iron.
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69 GTX 68 Road Runner

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#2382446 - 10/05/17 12:53 PM Re: Aftermarket RB Block [Re: JERICOGTX]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: Bend,OR USA
Aluminum blocks do not keep the cylinder as round as a iron block will when running shruggy Hence they make less HP N/A or with a power adder than a cast grey iron block will, the Compact Graphite iron blocks are even better than cast grey iron thumbs scope
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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2382451 - 10/05/17 12:57 PM Re: Aftermarket RB Block [Re: 10sec440]
JERICOGTX Offline
master

Registered: 01/20/03
Posts: 7971
Loc: MN
You could always HardBlock the aluminum block to keep it from moving around. I know people that have done it.
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69 GTX 68 Road Runner

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#2382583 - 10/05/17 04:27 PM Re: Aftermarket RB Block [Re: JERICOGTX]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: 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
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Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2382592 - 10/05/17 04:48 PM Re: Aftermarket RB Block [Re: 10sec440]
pittsburghracer Offline
Slowride

Registered: 02/02/05
Posts: 13149
Loc: PA.
I have to laugh out loud when I hear about bad ring seal on aluminum blocks
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1970 Duster
Edelbrock headed 408
6.143@110.89 mph
9.73@135.05 mph shifting at 6700 RPM
422 Indy headed small block
6.001@113.27mph
9.44@138.23

Untitled by John Cadamore, on Flickr





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#2382995 - 10/06/17 01:19 PM Re: Aftermarket RB Block [Re: pittsburghracer]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 31079
Loc: 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


Edited by Cab_Burge (10/06/17 01:19 PM)
_________________________
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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#2383283 - 10/07/17 12:53 AM Re: Aftermarket RB Block [Re: 10sec440]
camastomcat Offline
top fuel

Registered: 04/12/05
Posts: 2019
Loc: 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.

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#2385665 - 10/11/17 01:34 PM Re: Aftermarket RB Block [Re: 10sec440]
Al_Alguire Offline


Registered: 01/20/03
Posts: 16784
Loc: 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.
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#2385680 - 10/11/17 01:54 PM Re: Aftermarket RB Block [Re: 10sec440]
fast68plymouth Offline
I Live Here

Registered: 01/20/03
Posts: 11077
Loc: So. Burlington, Vt.
When it comes to a BB Mopar....... I'll take the 150lb weights saving from an aluminum block every time.
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68 Plymouth Satellite, 383, stock 906's, 3550lbs, 11.18 @ 123, 1.51 60'
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#2386092 - 10/12/17 12:48 AM Re: Aftermarket RB Block [Re: Al_Alguire]
HOTMOPR Offline
mopar

Registered: 05/25/11
Posts: 510
Loc: Rochester, 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?
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63 Savoy 440 727 street car
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#2386276 - 10/12/17 12:06 PM Re: Aftermarket RB Block [Re: 10sec440]
Al_Alguire Offline


Registered: 01/20/03
Posts: 16784
Loc: Las Vegas
Yes a Chevy deal..FWIW I have four engines all with aluminum blocks and wont go back to iron...
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"I am not ashamed to confess I am ignorant of what I do not know."

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

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#2386322 - 10/12/17 01:07 PM Re: Aftermarket RB Block [Re: 10sec440]
dvw Offline
master

Registered: 03/16/06
Posts: 7055
Loc: 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

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#2386341 - 10/12/17 01:51 PM Re: Aftermarket RB Block [Re: Al_Alguire]
JACK1440 Offline
mopar

Registered: 09/27/09
Posts: 409
Loc: 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.

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#2386745 - 10/13/17 09:15 AM Re: Aftermarket RB Block [Re: dvw]
SILVER67 Offline
super stock

Registered: 02/04/06
Posts: 758
Loc: 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
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Competition Wedge Engines Brewerton, NY

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#2386782 - 10/13/17 10:07 AM Re: Aftermarket RB Block [Re: 10sec440]
dvw Offline
master

Registered: 03/16/06
Posts: 7055
Loc: MI, usa
Mine isn't a World, It's a late Mopar Mega Block. 270lbs
Doug

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#2386816 - 10/13/17 10:38 AM Re: Aftermarket RB Block [Re: 10sec440]
an8sec70cuda Offline
I Live Here

Registered: 01/19/03
Posts: 10736
Loc: 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.
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'70 hemicuda...8.91 at 150.5 mph street car...Mopar Action feature Dec. '14
'69 road runner 446" w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
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#2386822 - 10/13/17 10:49 AM Re: Aftermarket RB Block [Re: an8sec70cuda]
DoubleD Offline
top fuel

Registered: 01/22/03
Posts: 1881
Loc: NE Ohio
World cast iron hemi block is 325+ pounds its a hefty thing

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