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ALI VS IRON Block #2466970
03/15/18 05:07 PM
03/15/18 05:07 PM
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MattW Offline OP
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So Goeff Turk is the first into the 7's and the writing said this was accomplished by allowing the Mopar racers to use the Aluminum block.
The question is why?
It's a blower motor with a CID of 345.
Did they need a bigger bore engine?
If so why not use the 6.4 VVT block?
I know they tried to produce the 6.1 for this and like the production blocks they are messed up.
Matt

Re: ALI VS IRON Block [Re: MattW] #2466988
03/15/18 05:41 PM
03/15/18 05:41 PM
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Tulsa, Oklahoma
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Those cars have to run on 9" tires. Races are often lost with one or both cars smoking the tires like a 60s fuel dragster.

I think the weight distribution is probably the big deal for them. Just my opinion I have not seen any of the racers comment.

Re: ALI VS IRON Block [Re: MattW] #2467004
03/15/18 06:12 PM
03/15/18 06:12 PM
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Fulton County, PA
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CMcAllister Offline
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These cars are still Stockers and have to meet the rules as far as allowed replacement parts, at least for NHRA. I haven't looked for accepted blocks for these cars, and I haven't looked at the NMCA rules so I don't know if they are allowed anything different.


If the results don't match the theory, change the theory.
Re: ALI VS IRON Block [Re: MattW] #2467018
03/15/18 06:42 PM
03/15/18 06:42 PM
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Las Vegas
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The NMCA uses NHRA rules for Stock/SS and shootout cars. Which is why Holley recognizes this as the first 7 second run by a shootout car. AS for the aluminum block I am sure it is all about the weight. They do have minimum weights but being able to put that weight were it is needed or will work best is likely the reasoning. Car was built by MR2 and I'm sure that's the thinking. The Air was KILLER when they made that run, like unheard of for Florida. Water grains below 20 the barometer was 30.+ and the DA was in the 500' area. Before the rains came Saturday


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Re: ALI VS IRON Block [Re: MattW] #2467037
03/15/18 07:46 PM
03/15/18 07:46 PM
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Frostbitefalls MN (Rocky&Bullw...
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A friend, Chuck Lofgren, runs a 6.1 drag pak car and said the aluminum block makes a bunch more power. No doubt though the front end wieght change didn't hurt! He complained about huge wheel stands. Haven't seen the car run since the change though.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: ALI VS IRON Block [Re: MattW] #2467046
03/15/18 08:02 PM
03/15/18 08:02 PM
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Fulton County, PA
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The air was crazy good. They were fast at Gainesville as well. I do see now where NHRA allowed the aluminum block to replace the iron block. I can't keep up.


If the results don't match the theory, change the theory.
Re: ALI VS IRON Block [Re: MattW] #2467089
03/15/18 09:37 PM
03/15/18 09:37 PM
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Charlotte, North Carolina
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Maybe because Chevrolet engines are aluminum blocks. They may have had to make some considerations for Mopar. It's about time!


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Re: ALI VS IRON Block [Re: MattW] #2467149
03/15/18 11:58 PM
03/15/18 11:58 PM
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Fulton County, PA
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Actually I read a story that said Mopar made the aluminum block a replacement part, accepted by NHRA, because all the iron blocks were only available as a long block assembly.


If the results don't match the theory, change the theory.
Re: ALI VS IRON Block [Re: MattW] #2467185
03/16/18 01:30 AM
03/16/18 01:30 AM
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Park Forest, IL
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They are package cars anyway. Ma Mopar (and the others) can pretty much get away with anything they want.


"Everybody funny, now you funny too."
Re: ALI VS IRON Block [Re: MattW] #2467244
03/16/18 10:18 AM
03/16/18 10:18 AM
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northern,Ohio,USA
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I posted this last yr about Goss that may or may not help with info here. Goss interview


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http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/
Re: ALI VS IRON Block [Re: Clanton] #2467253
03/16/18 10:55 AM
03/16/18 10:55 AM
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NW Indiana
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fbs63 Offline
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I am curious if these new aluminum blocks are updated Arrow Racing blocks or the G3 Hemi block. Mopar doesn't seem to make anything themselves anymore. I know for a fact Barton went to the GM camp because he couldn't get competitive, reliable parts from Mopar.

Re: ALI VS IRON Block [Re: sgcuda] #2467256
03/16/18 11:03 AM
03/16/18 11:03 AM
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Metro Detroit
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Originally Posted By sgcuda
Maybe because Chevrolet engines are aluminum blocks. They may have had to make some considerations for Mopar. It's about time!


Chevy blocks are iron...


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Re: ALI VS IRON Block [Re: OUTLAWD] #2467258
03/16/18 11:10 AM
03/16/18 11:10 AM
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Well Mopar should get a handicap because most of the guys on Moparts continue to argue that a cast iron block will produce so much more horsepower than an aluminum block will. Lol. Welcome to modern times guys.


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Re: ALI VS IRON Block [Re: CMcAllister] #2467267
03/16/18 11:34 AM
03/16/18 11:34 AM
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Frostbitefalls MN (Rocky&Bullw...
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Originally Posted By CMcAllister
Actually I read a story that said Mopar made the aluminum block a replacement part, accepted by NHRA, because all the iron blocks were only available as a long block assembly.

Much more likely it was as much or more ring seal as anything. If i recall correctly, Chuck said he picked up two tenths plus from that alone.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: ALI VS IRON Block [Re: pittsburghracer] #2467280
03/16/18 12:17 PM
03/16/18 12:17 PM
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MattW Offline OP
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Originally Posted By pittsburghracer
Well Mopar should get a handicap because most of the guys on Moparts continue to argue that a cast iron block will produce so much more horsepower than an aluminum block will. Lol. Welcome to modern times guys.

At that level you need ALL your ducks in a row!!
It's like top fuel, all have the power but it's who can put it to the ground.
Matt

Re: ALI VS IRON Block [Re: gregsdart] #2467281
03/16/18 12:18 PM
03/16/18 12:18 PM
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MattW Offline OP
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Originally Posted By gregsdart
Originally Posted By CMcAllister
Actually I read a story that said Mopar made the aluminum block a replacement part, accepted by NHRA, because all the iron blocks were only available as a long block assembly.

Much more likely it was as much or more ring seal as anything. If i recall correctly, Chuck said he picked up two tenths plus from that alone.


I wonder if the 6.4 truck block would be better than the 6.1 in ring seal?
Matt

Re: ALI VS IRON Block [Re: pittsburghracer] #2467288
03/16/18 12:31 PM
03/16/18 12:31 PM
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bean town ....Ca
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Originally Posted By pittsburghracer
Well Mopar should get a handicap because most of the guys on Moparts continue to argue that a cast iron block will produce so much more horsepower than an aluminum block will. Lol. Welcome to modern times guys.
I guess I'm one of the idiots that still believes an iron block can produce more power than aluminum.. I think that's been proven over and over.. but if you ask me what would be faster in the car.. that would be a whole nother question.. people need to consider weight and rules when picking a block.. if you have a car that weighs 2200 lb
. And your class requirements require you to be 2800.. more than likely you would want an iron block.. if you have a car that weighs 3000.. and the rules say you can be 2800.. I would think you would want the aluminum block.. stirthepot


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: ALI VS IRON Block [Re: WHITEDART] #2467290
03/16/18 12:35 PM
03/16/18 12:35 PM
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bean town ....Ca
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I can tell you it would take a tremendous amount of horsepower to run where these cars are running at these weights.. and the Dodge Factory iron block is not going to hang.. I believe the only race block available is aluminum but then again I'm usually wrong bondo


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: ALI VS IRON Block [Re: WHITEDART] #2467293
03/16/18 12:38 PM
03/16/18 12:38 PM
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NW Indiana
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An iron block produces more power, no question. See any aluminum blocks in pro-stock? The question that should be asked is the power loss offset by weight loss. In a sportsman drag car it is.

Re: ALI VS IRON Block [Re: MattW] #2467296
03/16/18 12:45 PM
03/16/18 12:45 PM
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Geoff Turk ran 7.97 at 170
^^^So what block is this guy running^^^it says stock class so is he running a iron block ?

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