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Old 04-29-2018, 06:39 AM   #1
Green2015

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6.4 questions

I recently purchased a new Hamilton 6.7 std bore block and having a shop do the install and any machine work needed. Was gonna run a sleeved down block to hold higher hp and the shop kinda strayed away from going this route wanting to keep the bigger displacement for drive ability on the street since this is for a street truck not strip dedicated truck. The goal was 1,500hp max and since Iím running QSB pistons to keep it happy on the street they decided to not sleeve it down cause it was gonna cause it to have to take .80 off the pistons to run the 6.7 crank if sleeved down to a .40 5.9 bore and since not running a custom forged pistons that could spell trouble losing that much material so I told to ok we can stick to std bore 6.7 cause they assured me the Hamilton block is stronger and they feel comfortable it holding 1,500hp and below not sleeved. Now they called me wanting to drop the stroke to 6.4 which Iím good with so I tell them go ahead and they can send the standard length rods back to wagler and get the .80 longer ones to be able to run the 5.9 crank. Well I didnít hear anything for a day or so then come to find out instead of sending the rods back they milled .80 off the top deck off the new motor and said itís too late now pretty much and that it will still hold the power goal as is cause the block is .80 thicker then OEM blocks. So my question is did this shop just screw my block up and set me up for failure or has anyone else run this set up besides Ashley Black and it actually hold decently? I hate to think these guys ruined this block cause they are actually a bigger name shop.
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Old 04-29-2018, 11:29 AM   #2
Cflanery88
 
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I’d be asking for a new block, and take business elsewhere. Not that I don’t think it’d hold, but just for the simple fact you told them what you wanted, and they didn’t do it.
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Old 04-29-2018, 12:39 PM   #3
Green2015

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Quote:
Originally Posted by Cflanery88 View Post
Iíd be asking for a new block, and take business elsewhere. Not that I donít think itíd hold, but just for the simple fact you told them what you wanted, and they didnít do it.
Yeah I agree. We spoke and I told them my budget far as labor and machine cost I wanted to try to stay around $12k cause I supplied all the hard parts and they seemed comfortable with that range even with the cost of sleeves and now it just seems to be getting turned around going different directions with them. They have also had the truck 4 months to do all this and fronted $7k and all thatís been done is trans pulled and old motor and thatís about it besides decking a brand new perfectly good block.
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Old 05-03-2018, 08:17 PM   #4
Devilman

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They'd be buying me a new block, plain and simple. You didn't ask for stock length rods and a milled deck, you asked for longer rods. Hamilton block or not they took strength away by milling it.
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Old 05-03-2018, 08:36 PM   #5
Green2015

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I spoke to the shop owner and he was professional about it and said he understands if I donít feel comfortable running that setup and said he would purchase the block from me and order a new Hamilton block and start over fresh and I decided on just sleeving down to a 5.9 .40 bore and 5.9 crank and QSB pistons and figured if it splits the block on them thick of sleeves then it wasnít meant to be. I know Iím gonna lose a little TQ and drive ability on being able to spool bigger chargers as easy like if it was 6.7 bore but have the peace of mind not busting the block.
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Old 05-03-2018, 08:48 PM   #6
Devilman

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I don't think you'll bust a block without sleeves, its a street truck man, you're not gonna be runnin around with a 1500HP tune all day everyday, even if you did you'll be breaking all kinds of other stuff before you split a block.

Also, what the machinist is not telling you is there isn't a difference in deck height between a 5.9 and 6.7, they're the same deck height, so you've still got a block that's been decked .080.....for no reason, so hows he gonna make up that .080? They gonna take material off the pistons now?
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Last edited by Devilman; 05-03-2018 at 08:50 PM.
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Old 05-04-2018, 12:58 AM   #7
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There's no way I would have put up anything more than the funds for the basic parts to start the build on the short/longblock.
Also, taking them the truck to tear apart beforehand was pointless.

Now you have a torn apart truck, a messed up block and a deposit they're likely not going to want to return.
I'd be screaming bloody murder right now.

Mark.
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Old 05-04-2018, 08:34 AM   #8
Green2015

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Quote:
Originally Posted by Devilman View Post
I don't think you'll bust a block without sleeves, its a street truck man, you're not gonna be runnin around with a 1500HP tune all day everyday, even if you did you'll be breaking all kinds of other stuff before you split a block.

Also, what the machinist is not telling you is there isn't a difference in deck height between a 5.9 and 6.7, they're the same deck height, so you've still got a block that's been decked .080.....for no reason, so hows he gonna make up that .080? They gonna take material off the pistons now?
The new block they ordered is std hight same as any block. Staying standard rod length and just running 5.9 crank and sleeving it down to .40 5.9 bore so it will basically be a 5.9 when sleeved down with QSB pistons so nithong will have to be milled since it will be a 5.9 bore and stroke.
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Old 05-04-2018, 08:37 AM   #9
Green2015

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Quote:
Originally Posted by Mark Nixon View Post
There's no way I would have put up anything more than the funds for the basic parts to start the build on the short/longblock.
Also, taking them the truck to tear apart beforehand was pointless.

Now you have a torn apart truck, a messed up block and a deposit they're likely not going to want to return.
I'd be bloody murder right now.

Mark.
Oh I agree now. Plan was to use my 6.7 crank and little parts on the new motor build so that why I took them the truck. I figured some funds up front would motivate them. They are a big name reputable shop so Iím gonna give them a chance to get their **** together on this and if they canít I guess a lawsuit will be in the works we shall see
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Old 05-04-2018, 08:44 AM   #10
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Holy fukking hard to read run on sentence, Batman.
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Old 05-04-2018, 09:00 AM   #11
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Quote:
Originally Posted by Green2015 View Post
The new block they ordered is std hight same as any block. Staying standard rod length and just running 5.9 crank and sleeving it down to .40 5.9 bore so it will basically be a 5.9 when sleeved down with QSB pistons so nithong will have to be milled since it will be a 5.9 bore and stroke.
Oh ok that's makes sense, I misunderstand the last post as you'd still be running the decked block. Still don't think you need to sleeve it down to .40 over 5.9 bore but that's just my opinion.
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Old 05-04-2018, 11:08 AM   #12
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Quote:
Originally Posted by Devilman View Post
I don't think you'll bust a block without sleeves, its a street truck man, you're not gonna be runnin around with a 1500HP tune all day everyday, even if you did you'll be breaking all kinds of other stuff before you split a block.

Also, what the machinist is not telling you is there isn't a difference in deck height between a 5.9 and 6.7, they're the same deck height, so you've still got a block that's been decked .080.....for no reason, so hows he gonna make up that .080? They gonna take material off the pistons now?
I'm not suggesting this, but pointing out, that mine is a decked 6.7 with 5.9 crank. The block is not beyond reuse.

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Old 05-04-2018, 11:49 AM   #13
Green2015

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And to clear some stuff up no I’m not threatening a lawsuit what so ever just was really looking for people has ran similar blocks and it hold high hp numbers.
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Old 05-13-2018, 01:52 AM   #14
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Is this a CR or ppump? I wouldn’t wanna run a hot street setup (insert assuming fast spool up and uber torque) on a CR with the decked block. Not familiar enough with Hamilton’s block but I’d give the block every fighting chance to live especially on a CR. People have split standard bore 6.7 blocks on the street around 900 hp.
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Old 05-13-2018, 07:09 AM   #15
Green2015

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Yes it’s a CR. Hamilton blocks are just tapped for 14mm hardwear with 7 cam bushings installed. Says it has a little more nickel in the casting but that’s it. The new HD blocks are cast .80 thicker and freeze plugs gone so a little stronger but at the power range I want it needs sleeves regardless and all the deck it can retain.

Last edited by Green2015; 05-13-2018 at 07:10 AM.
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