Building a 383....
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Pro
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From: somewhere south of normal
Building a 383....
How dependable is a cast 400 crank for a stroker application..? What is the HP limit for this crank, using high performance rods and forged pistons...? I beleive I can safely go to 400hp. What about 450hp, 500hp....?
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Building a 383.... (HDIronman)
What about 550- 600 HP ? :lol:
I am running a Scat 9000 cast crank in my new 406ci ( not in the car yet ) I had a few conversations with knowledgeable people about this and what I found was a good cast crank is fine for a daily driver or street/strip motor. You have to look at it this way, if you do rev it out how long are you going to stay at 6000 RPM ? probably only a few seconds. If you were building a cirlcle track motor or a high performance boat motor where you have sustained high RPM's then I would use a forged crank. I am williing ot bet the majority of weekend warriors at the drag strip are getting down the 1/4 mile with cast cranks you heear of many things breaking at the strip but hardly ever hear someone broke their crank :D
I am running a Scat 9000 cast crank in my new 406ci ( not in the car yet ) I had a few conversations with knowledgeable people about this and what I found was a good cast crank is fine for a daily driver or street/strip motor. You have to look at it this way, if you do rev it out how long are you going to stay at 6000 RPM ? probably only a few seconds. If you were building a cirlcle track motor or a high performance boat motor where you have sustained high RPM's then I would use a forged crank. I am williing ot bet the majority of weekend warriors at the drag strip are getting down the 1/4 mile with cast cranks you heear of many things breaking at the strip but hardly ever hear someone broke their crank :D
Drifting
Joined: Jan 2002
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From: Vail AZ
Re: Building a 383.... (LeAnn82Collector)
I used a stock Chevrolet 400 cast crank when I built a 383 for my '69 Camaro. I revved the **** out of it regularly and fed it some pretty strong doses of nitrous on occasion. I never had a problem with it.
Tom
Tom
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From: somewhere south of normal
Re: Building a 383.... (tpiini)
I like what I hear so far. It's true that most of the time the motor will not see high revs, and will be simply a daily driver. But I want it to scream when I want it to scream.
I'm debating between 10:1 cr with iron heads, or 11:1 cr with aluminum heads. The rest of the motor will be hydraulic flat tappet, but I have not decided on the cam as of yet.
Question: Are any of you guys/gals using a flywheel balance plate with there externally balanced rotating assembly? I've always dealt with internally balanced engines.
:cool:
I'm debating between 10:1 cr with iron heads, or 11:1 cr with aluminum heads. The rest of the motor will be hydraulic flat tappet, but I have not decided on the cam as of yet.
Question: Are any of you guys/gals using a flywheel balance plate with there externally balanced rotating assembly? I've always dealt with internally balanced engines.
:cool:
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Building a 383.... (HDIronman)
I bought a new Pioneer 400ci flywheel, you can get a used one and have it resurfaced, no experience with balance plate :D
Drifting
Joined: Jan 2002
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From: Vail AZ
Re: Building a 383.... (HDIronman)
I like what I hear so far. It's true that most of the time the motor will not see high revs, and will be simply a daily driver. But I want it to scream when I want it to scream.
I'm debating between 10:1 cr with iron heads, or 11:1 cr with aluminum heads. The rest of the motor will be hydraulic flat tappet, but I have not decided on the cam as of yet.
Question: Are any of you guys/gals using a flywheel balance plate with there externally balanced rotating assembly? I've always dealt with internally balanced engines.
:cool:
I'm debating between 10:1 cr with iron heads, or 11:1 cr with aluminum heads. The rest of the motor will be hydraulic flat tappet, but I have not decided on the cam as of yet.
Question: Are any of you guys/gals using a flywheel balance plate with there externally balanced rotating assembly? I've always dealt with internally balanced engines.
:cool:
For my $0.02, I'd go with the aluminum heads if I could afford it. Also, I'd consider a roller cam/valvetrain setup. A little more money, but LOTS more power!
[Modified by tpiini, 5:57 PM 5/1/2004]
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From: somewhere south of normal
Re: Building a 383.... (tpiini)
[QUOTE]I used a stock (new) flexplate & 400 balancer. I also had the engine balanced before assembly.QUOTE]
The rotating assembly will be fully balanced before going together. However I have a fairly new flywheel that has been resurfaced and installed a new ring gear, so I'd rather not have to purchase a new flywheel. Flexplates are for converters.
:cool:
The rotating assembly will be fully balanced before going together. However I have a fairly new flywheel that has been resurfaced and installed a new ring gear, so I'd rather not have to purchase a new flywheel. Flexplates are for converters.
:cool:
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Drifting
Joined: Jan 2002
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From: Vail AZ
Re: Building a 383.... (HDIronman)
The rotating assembly will be fully balanced before going together. However I have a fairly new flywheel that has been resurfaced and installed a new ring gear, so I'd rather not have to purchase a new flywheel. Flexplates are for converters. :cool:
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Building a 383.... (Fevre)
Scat has a internally balanced 383ci 9000 series cast crank and a new internally balanced 400ci crank, wish they had it when I started my project could have saved me a few bucks :D
Drifting
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Re: Building a 383.... (MotorHead)
I am williing ot bet the majority of weekend warriors at the drag strip are getting down the 1/4 mile with cast cranks you heear of many things breaking at the strip but hardly ever hear someone broke their crank :D
If you got the $$$ get forged, it's relatively cheap insurance if you look at the big picture. Unless you only drive it like a granny.
Jeff
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From: somewhere south of normal
Re: Building a 383.... (MotorHead)
Scat has a internally balanced 383ci 9000 series cast crank and a new internally balanced 400ci crank, wish they had it when I started my project could have saved me a few bucks :D
Doe's anyone here use one of these balance plates...?
[Modified by HDIronman, 7:53 PM 5/2/2004]
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Re: Building a 383.... (no_radio)
Yes, but you hardly ever hear of a broken cast connecting rod, either, but that is what initiated my current FORGED 383 buildup.
If you got the $$$ get forged, it's relatively cheap insurance if you look at the big picture. Unless you only drive it like a granny.
Jeff
If you got the $$$ get forged, it's relatively cheap insurance if you look at the big picture. Unless you only drive it like a granny.
Jeff
Insurance yes, but also a little overkill for the street.
Drifting
Joined: Jan 2002
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From: Vail AZ
Re: Building a 383.... (HDIronman)
I've never used the plate you have pictured, but I see no reason why it wouldn't work. As long as you're going to have the engine balanced anyway, I say you've got nothing to lose by ordering one and using it. The balance shop will certainly not be able to get a proper balance if the plate doesn't do it's thing.
Le Mans Master
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Re: Building a 383.... (tpiini)
I bought speedomotive's (they build a lot of engines for salt flat racing) 500 hp engine. I chose a lesser cam which I now regret. So I should have around 480hp and 500 lb/ft of tq and they recommended a scat cast crank.
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From: Smalltownville Michigan
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St. Jude Donor '09
Re: Building a 383.... (MotorHead)
Scat has a internally balanced 383ci 9000 series cast crank and a new internally balanced 400ci crank, wish they had it when I started my project could have saved me a few bucks :D
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Re: Building a 383.... (HDIronman)
IMO - with the large selection of correct crank main journal diameters. Why would anybody even think of using 400 crank and having it turned down. They sell lots of the lower priced cast models in the internally balanced versions
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From: Living in the Hartland
Re: Building a 383.... (gkull)
Phil
Check out their 383 street or super street kits, $699 or $799 balanced with flywheel. :shocked:
http://ohiocrank.com/crankKits.html
[Modified by Fevre, 11:31 AM 5/3/2004]
Check out their 383 street or super street kits, $699 or $799 balanced with flywheel. :shocked:
http://ohiocrank.com/crankKits.html
[Modified by Fevre, 11:31 AM 5/3/2004]
Race Director
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Building a 383.... (no_radio)
Yes, but you hardly ever hear of a broken cast connecting rod, either, but that is what initiated my current FORGED 383 buildup.
If you got the $$$ get forged, it's relatively cheap insurance if you look at the big picture. Unless you only drive it like a granny.
Jeff
If you got the $$$ get forged, it's relatively cheap insurance if you look at the big picture. Unless you only drive it like a granny.
Jeff