Help selecting 383 kit.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Help selecting 383 kit.
I was looking at both of these 383 kits from CNC-Motorsports. I was particularly interested in the first kit, which is what they call the Budget Performance kit because it has the Speed-Pro pistons, instead of the KB pistons. However, he did not know the part number for the pistons because they are a kit from Eagle.
I was looking at the internal balance set-up. The tech also told me that if I had to clearance the rods, it would not have to be rebalanced because you usually only remove less than .5 gram from the rod anyway. BTW, the second kit costs $90.00 bucks extra to balance.
What are your thoughts on these 2 kits and whether it would have to be rebalanced after cam clearancing?
http://www.cnc-motorsports.com/produ...39&CtgID=20134
http://www.cnc-motorsports.com/produ...986&CtgID=9048
I was looking at the internal balance set-up. The tech also told me that if I had to clearance the rods, it would not have to be rebalanced because you usually only remove less than .5 gram from the rod anyway. BTW, the second kit costs $90.00 bucks extra to balance.
What are your thoughts on these 2 kits and whether it would have to be rebalanced after cam clearancing?
http://www.cnc-motorsports.com/produ...39&CtgID=20134
http://www.cnc-motorsports.com/produ...986&CtgID=9048
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Call Matt at M&R engines and ask what they charge for a balanced rotating assembly - he's great to work with and they have great deals, I just bought my 383 short block from them.
They have a 383 short block with cast crank and forged rods and pistons for $1450, $1600 shipped - includes flexplate and balancer... not much more than you're going to spend on the rotating assembly and the machine work on your old block....just an idea....
They have a 383 short block with cast crank and forged rods and pistons for $1450, $1600 shipped - includes flexplate and balancer... not much more than you're going to spend on the rotating assembly and the machine work on your old block....just an idea....
Racer
Joined: May 2005
Posts: 470
Likes: 1
From: Amelia Ohio
It looks like both are cast assemblies so you will not want to spin either past 5000-5500 rpm's. The second one looks like the rods are upgraded so will probably handle the higher R's. I got my assembly from speedway motors and they clearanced the rods before balancing, I would call to check on this. These look like good low buck assemblies that will easily get you into the 400's torque and horses.
Chris
Chris
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
If you get a forged Eagle kit there will be zero rod clearancing, just block clearancing. The rods are already factory clearanced. About $1600
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Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Ok, I should have prefaced it with the fact that I am trying to stay around the $800-$850 or below range. I thought that the first kit looked pretty good. When I asked the guy at CNC-Motorsports, he told me that they are less expensive because Eagle is trying to get rid of them so they are selling them to wholesalers for next to nothing.
He also said that they only come with the Speedpro pistons, not the Keith Black pistons, but I know that jackson prefers Speedpro to KB.
He also said that they only come with the Speedpro pistons, not the Keith Black pistons, but I know that jackson prefers Speedpro to KB.
Burning Brakes
Joined: Jan 2004
Posts: 1,043
Likes: 4
From: Va
I was looking at both of these 383 kits from CNC-Motorsports. I was particularly interested in the first kit, which is what they call the Budget Performance kit because it has the Speed-Pro pistons, instead of the KB pistons. However, he did not know the part number for the pistons because they are a kit from Eagle.
I was looking at the internal balance set-up. The tech also told me that if I had to clearance the rods, it would not have to be rebalanced because you usually only remove less than .5 gram from the rod anyway. BTW, the second kit costs $90.00 bucks extra to balance.
What are your thoughts on these 2 kits and whether it would have to be rebalanced after cam clearancing?
http://www.cnc-motorsports.com/produ...39&CtgID=20134
http://www.cnc-motorsports.com/produ...986&CtgID=9048
I was looking at the internal balance set-up. The tech also told me that if I had to clearance the rods, it would not have to be rebalanced because you usually only remove less than .5 gram from the rod anyway. BTW, the second kit costs $90.00 bucks extra to balance.
What are your thoughts on these 2 kits and whether it would have to be rebalanced after cam clearancing?
http://www.cnc-motorsports.com/produ...39&CtgID=20134
http://www.cnc-motorsports.com/produ...986&CtgID=9048
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
I have heard of Ohio Crankshaft before, but it seems like Eagle and Scat are always at the top of everyone's cast crank list. Does anyone have any experiences, good or bad, with Ohio Crankshaft?
Do you have a number for them? I already have a block that just needs clearanced, but I can check with them on a rotating assembly.
Call Matt at M&R engines and ask what they charge for a balanced rotating assembly - he's great to work with and they have great deals, I just bought my 383 short block from them.
They have a 383 short block with cast crank and forged rods and pistons for $1450, $1600 shipped - includes flexplate and balancer... not much more than you're going to spend on the rotating assembly and the machine work on your old block....just an idea....
They have a 383 short block with cast crank and forged rods and pistons for $1450, $1600 shipped - includes flexplate and balancer... not much more than you're going to spend on the rotating assembly and the machine work on your old block....just an idea....
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
if they're too lazy to find & provide you a good part number ... I'd go elsewhere. Ask again ... Let us know what P/N is.How accurate would you expect their stated compression ratio to be when they don't even know the piston P/N? ... yes I know dome volume can be measured (& then scr) ... but do you really think they know what the dv is when they don't know the P/N? Notwithstanding, their stated cr is in the ballpark.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
I called CNC again and they said that they do not know that piston part number because the kit comes directly from Eagle. I did cross-reference the kit number on a few other sites that sell the Eagle kits, and all of the sites, including Summit list the piston as -12cc, but do not list the part number.
On a different note, I called Ohio Crankshaft regarding their 383 Street rotating assembly. It lists for $495 + $200 for balancing + $25 for dish pistons (H859CP) + $100 to upgrade to new bushed rods (instead of the re-con pressed rods). I figured this one would get to my door around $860.00. The rods are already cam clearanced. It is external balance, though.
Does anyone have any opinions, positive or negative, about Ohio Crankshaft parts?
On a different note, I called Ohio Crankshaft regarding their 383 Street rotating assembly. It lists for $495 + $200 for balancing + $25 for dish pistons (H859CP) + $100 to upgrade to new bushed rods (instead of the re-con pressed rods). I figured this one would get to my door around $860.00. The rods are already cam clearanced. It is external balance, though.
Does anyone have any opinions, positive or negative, about Ohio Crankshaft parts?
Burning Brakes
Joined: Sep 2005
Posts: 993
Likes: 3
From: Iowa
Well I don't have a failure point but we take our forged eagle cranks out past 7500, sometimes 8000 without any problems. We see most crankshafts die from torque, not so much RPM; that's the connecting rods area of expertise! I mean heck, we've spun stock production cast cranks out to 7300 in hobby stocks for years and have never had one fail!
Instructor
Joined: Feb 2005
Posts: 150
Likes: 0
From: Solana Beach ca
Ohio Crankshaft has been around for a long time. They advertise in national dragster (how I found them) and they came highly recomended by my engine builder. Its a small shop that stands behind their work, all material come with metelergy/ tracibility reports and made in the USA. They have many different kits (I think I used the street rodder 383) for many different applications and can talk intelegently on the subject over the phone. They have a web site so check it out.
Instructor
Joined: Aug 2004
Posts: 174
Likes: 0
From: Roskilde
I got a 383 kit from them, the coated crank fitted the block with no modifications and the look and feel is better that anything I've seen from Eagle, cheaper too. 
Le Mans Master
Joined: Apr 2005
Posts: 6,339
Likes: 416
From: Seattle Area WA
If you are on a budget there is nothing wrong with a cast crank or stock GM rods if they have been worked over and ARP rod bolts installed. For years all had to use were the stock 400 cranks turned down along with the stock 400 rods to boot. I had the cranks nitrided but would run this combo to 6,000 daily with a 125 shot of NOS and those motors lived a long time. The Scat and Eagle cranks are an even better Nodular cast material with more tolerance to breakage. It sounds like Ohio Crank may be your best bet.
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05