C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Another 383 build question

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Old Jan 22, 2010 | 02:20 PM
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Default Another 383 build question

I've read quite a few posts but didn't find exactly what I was looking for so here goes another question (or 2).

I am considering 2 blocks, was wondering which one was the better deal.

1. 350 block from 95 w/ 100K including normal shortblock internals. $350

2. 350 4 bolt block bare (unknown year but assuming LT1) but the shop won't sell it unless they do the machining $900.

Option 1 gives me the option to stay stock, but if I decide to go 383 it may not matter.

Which leads to ? 2, What should I expect to pay for decent internals for a 383 block? I'm not talking race engine but best bang for the buck on a street rod. I will be putting on stock ported heads, ported intake w/ 58 TB, LT headers, 1.6 rockers and custom cam.
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Old Jan 22, 2010 | 02:34 PM
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Originally Posted by tuffLUV
I've read quite a few posts but didn't find exactly what I was looking for so here goes another question (or 2).

I am considering 2 blocks, was wondering which one was the better deal.

1. 350 block from 95 w/ 100K including normal shortblock internals. $350

2. 350 4 bolt block bare (unknown year but assuming LT1) but the shop won't sell it unless they do the machining $900.

Option 1 gives me the option to stay stock, but if I decide to go 383 it may not matter.

Which leads to ? 2, What should I expect to pay for decent internals for a 383 block? I'm not talking race engine but best bang for the buck on a street rod. I will be putting on stock ported heads, ported intake w/ 58 TB, LT headers, 1.6 rockers and custom cam.
It looks like both blocks will end up costing the same once machining is done. You want to make sure that block #2 is a 1 piece rear main seal block. A rotating assembly with cast crank, forged pistons and stock rods should run in the neighborhood of $700. Budget for balancing of the assembly as well.

You won't need a 58mm TB with this build. The stock should be adequate.
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Old Jan 22, 2010 | 04:21 PM
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I am building a 383 and after lots of dedating I went with the Scat 9000 series crank , forged rods and SRP pistons/rings. This will come with all King bearings and a pionere flex plate. $1,300 from Scat.
I would at least clean-up the plenum runners and port match to your heads. 52mm TB would be a good addition. You will probably end up with close to $6,000 in parts. It's the little things that add up quick. Machine work will be Just under the $1,000 mark depending on what you have done. good luck.
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Old Jan 22, 2010 | 04:44 PM
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Originally Posted by C4vettrn
I would at least clean-up the plenum runners and port match to your heads. 52mm TB would be a good addition. You will probably end up with close to $6,000 in parts. It's the little things that add up quick. Machine work will be Just under the $1,000 mark depending on what you have done. good luck.
The intake has already been ported to match. I have been questioned several times on the 58 TB. My tuner is who recommended the 58 so that is what I bought. I was just going to do the H/C mod but now I'm leaning toward the bottom end as well since I have 146K on the engine. That's what lead to looking for & finding the 100K block and then one thing leads to another. If I'm going to freshen up a block why not go to a 383. You get the idea. $6000, is that for just the block or the running engine?
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Old Jan 22, 2010 | 05:44 PM
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For you that should be running I would think. The problem is before you know it you will be replacing misc. sensors, hoses, wires, distributor, belts and on and on. You don't want to put a new engine back in the car and spend all your time chasing down grimmlens that's why alot of questionable thins are replaced.
Know depending on how much tourqe /HP you end up with and the cam you select you may need to replace tourqe converter for a higher stall and the tranny isn't going to last to long with a heavy foot and 450hp. Is your wallet hurting yet I think you get the idea.
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Old Jan 22, 2010 | 07:51 PM
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Originally Posted by C4vettrn
Know depending on how much tourqe /HP you end up with and the cam you select you may need to replace tourqe converter for a higher stall and the tranny isn't going to last to long with a heavy foot and 450hp. Is your wallet hurting yet I think you get the idea.
I will be replacing the torque converter and will most likely go after the 2.59's in the rear too. Thats why the research now. I can always just stay mild and stock on the block like I was doing from the start if my banker starts smacking me around.
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Old Jan 23, 2010 | 09:37 AM
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What about this block. It seems like a good buy if its not junk.

CPE (Cook Performance Engines)
Block -Baked, Steel Shot, Magnafluxed, Square Decked with BHJ block tru, Bored, Honed with torque plates and jet cleaned.
Crank -Eagle Cast Steel 3.75" Stroke Internally Balanced
Rods -Eagle SIR 5.7" With ARP 8740 rod bolts
Pistons -SPEED PRO
Rings -PERFECT CIRCLE Plasma-Moly
Bearings -Clevite
Core Plugs -Brass
Main Stud -ARP Main Stud Kit

$1995
+$300 shipping
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Old Jan 23, 2010 | 10:05 AM
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Originally Posted by tuffLUV
What about this block. It seems like a good buy if its not junk.

CPE (Cook Performance Engines)
Block -Baked, Steel Shot, Magnafluxed, Square Decked with BHJ block tru, Bored, Honed with torque plates and jet cleaned.
Crank -Eagle Cast Steel 3.75" Stroke Internally Balanced
Rods -Eagle SIR 5.7" With ARP 8740 rod bolts
Pistons -SPEED PRO
Rings -PERFECT CIRCLE Plasma-Moly
Bearings -Clevite
Core Plugs -Brass
Main Stud -ARP Main Stud Kit

$1995
+$300 shipping
Do a search on Eagle Sir rods.
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Old Jan 23, 2010 | 10:34 AM
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Check this ad out on Racing Junk depending on your budget as this may not be a bad deal.
http://www.racingjunk.com/category/9...VERYTHING.html
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Old Jan 23, 2010 | 10:47 AM
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I hate to say it but $4500 for block alone is out of my league. I won't be racing this car. It is just a weekend driver. Not to say I won't take it to the 1/4 track once or twice. When I did the search I actually found little said about the negative on the Eagle. But, I didn't spend a couple hours reading either. I'm guessing it wouldn't cost much to upgrade to the scat rods though. Have you heard of CPE?
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Old Jan 23, 2010 | 10:59 AM
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You are asking questions about an LT1 engine? It seems that some of the information in this thread including the Dart shortblock doesn't apply to the LT1 engine.
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Old Jan 23, 2010 | 11:02 AM
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Originally Posted by STL94LT1
You are asking questions about an LT1 engine? It seems that some of the information in this thread including the Dart shortblock doesn't apply to the LT1 engine.
Yes, for a '93 LT1 replacement.
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Old Jan 23, 2010 | 11:37 AM
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the eagle SIR rods are notorious for failure, seriously. No need for top of the line for what youre doing but scat>eagle
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Old Jan 23, 2010 | 11:43 AM
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Originally Posted by cuisinartvette
the eagle SIR rods are notorious for failure, seriously. No need for top of the line for what youre doing but scat>eagle

and the eagle cast crank is definately not an improvement over the stocker........
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Old Jan 23, 2010 | 12:06 PM
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Originally Posted by tuffLUV
I hate to say it but $4500 for block alone is out of my league. I won't be racing this car. It is just a weekend driver. Not to say I won't take it to the 1/4 track once or twice. When I did the search I actually found little said about the negative on the Eagle. But, I didn't spend a couple hours reading either. I'm guessing it wouldn't cost much to upgrade to the scat rods though. Have you heard of CPE?

If your going to build a stroker the Scat I beam with the 7/16 bolts is a good choice as it has plenty of cam clearnace then a stock rods and pan rail clearance as well. Ans u can find them for about 300.00 dollars

I have sen guys take new stock replacement Scat rods and hack them up on the top of the rod bolt and the edge of the rods.

Good luck with your build
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Old Jan 23, 2010 | 02:26 PM
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Bill,

That CPE motor you are looking at is a really good deal. I was going to recommend them to you but you already found them. For about 700 more you can get splayed mains and forged pistons. I believe the shortblock comes with a 3yr warranty. They sell alot of LT1's on Ebay. I would check with "tpi 421 vette" about a good deals on some brand new AFR heads 195cc street heads for that shortblock. You can get them for almost as cheap as ported stockers and they are brand new come with springs and guideplates and outflow the stockers by about 30cfm across the board. Take care

Steve
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Old Jan 23, 2010 | 04:39 PM
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Check with Chad a http://www.golenengineservice.com/ as they build alot of LT1 engines.
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To Another 383 build question

Old Jan 24, 2010 | 10:48 AM
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Originally Posted by BLOCKMAN
Check with Chad a http://www.golenengineservice.com/ as they build alot of LT1 engines.
They did have a low end 383 with Scat parts that would work for my app, but I noticed they use Eagle on their competition motors.
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Old Jan 24, 2010 | 10:50 AM
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I would like to say thanks to all who have taken their time to give their opinions on my project so far. It is appreciated.
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Old Jan 24, 2010 | 12:19 PM
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Originally Posted by tuffLUV
They did have a low end 383 with Scat parts that would work for my app, but I noticed they use Eagle on their competition motors.
I am not a big fan of Eagle as balance for alot of other shops and when its there I mic up the journals and have not been very impressed with what I have seen.

Take their rods break them down and retorque them and see if they repeat??
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