My VQ35HR Build
07-09-2009, 09:21 PM
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My VQ35HR Build
Well some of you know my old motor was blown.
I am building a new block. S&R Performance in Tampa FL is doing the work
Here is what we are doing
CP Pistons (.5mm over)
Eagle H Beam Rods
BC Titanium Springs & Retainers
HKS Head Gaskets
ATI Super Damper
ARP Head bolts/Studs
Custom block guards
Im sure I have forgotten something ill update this list as i remember.
Pics will be posted here as it progresses
I am building a new block. S&R Performance in Tampa FL is doing the work
Here is what we are doing
CP Pistons (.5mm over)
Eagle H Beam Rods
BC Titanium Springs & Retainers
HKS Head Gaskets
ATI Super Damper
ARP Head bolts/Studs
Custom block guards
Im sure I have forgotten something ill update this list as i remember.
Pics will be posted here as it progresses
Last edited by Jasonvs2146; 07-10-2009 at 10:23 AM.
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07-24-2009, 08:02 AM
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If you look at the original pictures that I posted of the VQ engine block, you'll see round cooling passages around each of the cylinders. They are for coolant to run up and down beside the cylinders to cool them off and dissipate the heat from combustion.
The top of the block is called the "deck." You may have heard the term "decking" a block. It means milling the top of the block to true up the deck. A block with coolant openings up to the bottom of the cylinder heads is called an open deck block. Just like in this picture.
If you look at that picture and imagine the tremendous combustion forces and explosions that occur in each of the cylinders, you can see how the open deck configuration would not be best from a performance standpoint. The cylinder becomes unstable and it becomes easier to blow a head gasket.
What S&R did was to weld in billet aluminum into the top of the cylinder cooling passages and create a closed deck block. That's actually pretty cool. I've never seen anyone do that before. The new welded in billet pieces strengthen the block and make it much more resistant to twisting and blowing head gaskets.
Here's the picture after the billet pieces have been welded in. Looks like the block will have to be decked again to clean things up. I hope Bobby posts another picture of the block after it's been decked again. You'll be surprised at how cool it will look.
When you first look at it, it seems like that would cut off the circulation from the cylinder heads. That's what Danny originally asked about. It turns out that these passages do not pass through into the cylinder heads, so there is no actual loss of cooling ability. I suppose technically the coolant doesn't go quite as far up the cylinder as it used to, but it's only slightly less (the thickness of the welded in billet shim).
The top of the block is called the "deck." You may have heard the term "decking" a block. It means milling the top of the block to true up the deck. A block with coolant openings up to the bottom of the cylinder heads is called an open deck block. Just like in this picture.
If you look at that picture and imagine the tremendous combustion forces and explosions that occur in each of the cylinders, you can see how the open deck configuration would not be best from a performance standpoint. The cylinder becomes unstable and it becomes easier to blow a head gasket.
What S&R did was to weld in billet aluminum into the top of the cylinder cooling passages and create a closed deck block. That's actually pretty cool. I've never seen anyone do that before. The new welded in billet pieces strengthen the block and make it much more resistant to twisting and blowing head gaskets.
Here's the picture after the billet pieces have been welded in. Looks like the block will have to be decked again to clean things up. I hope Bobby posts another picture of the block after it's been decked again. You'll be surprised at how cool it will look.
When you first look at it, it seems like that would cut off the circulation from the cylinder heads. That's what Danny originally asked about. It turns out that these passages do not pass through into the cylinder heads, so there is no actual loss of cooling ability. I suppose technically the coolant doesn't go quite as far up the cylinder as it used to, but it's only slightly less (the thickness of the welded in billet shim).
Last edited by Jasonvs2146; 07-24-2009 at 08:06 AM.
07-24-2009, 08:22 AM
#10
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Is this more cost effective and/or easier than Sleeving the block?........some sleeved block guys are making mucho power and pushing high combustion pressures (38psi of boost at 8.5:1 comp)
I'd be interested to see what the coolant and oil temps due. (we know sleeved motor cars run hotter than stock sleeved cars, this looks like it may be even more impacting)
tom
I'd be interested to see what the coolant and oil temps due. (we know sleeved motor cars run hotter than stock sleeved cars, this looks like it may be even more impacting)
tom
If you look at the original pictures that I posted of the VQ engine block, you'll see round cooling passages around each of the cylinders. They are for coolant to run up and down beside the cylinders to cool them off and dissipate the heat from combustion.
The top of the block is called the "deck." You may have heard the term "decking" a block. It means milling the top of the block to true up the deck. A block with coolant openings up to the bottom of the cylinder heads is called an open deck block. Just like in this picture.
If you look at that picture and imagine the tremendous combustion forces and explosions that occur in each of the cylinders, you can see how the open deck configuration would not be best from a performance standpoint. The cylinder becomes unstable and it becomes easier to blow a head gasket.
What S&R did was to weld in billet aluminum into the top of the cylinder cooling passages and create a closed deck block. That's actually pretty cool. I've never seen anyone do that before. The new welded in billet pieces strengthen the block and make it much more resistant to twisting and blowing head gaskets.
Here's the picture after the billet pieces have been welded in. Looks like the block will have to be decked again to clean things up. I hope Bobby posts another picture of the block after it's been decked again. You'll be surprised at how cool it will look.
When you first look at it, it seems like that would cut off the circulation from the cylinder heads. That's what Danny originally asked about. It turns out that these passages do not pass through into the cylinder heads, so there is no actual loss of cooling ability. I suppose technically the coolant doesn't go quite as far up the cylinder as it used to, but it's only slightly less (the thickness of the welded in billet shim).
The top of the block is called the "deck." You may have heard the term "decking" a block. It means milling the top of the block to true up the deck. A block with coolant openings up to the bottom of the cylinder heads is called an open deck block. Just like in this picture.
If you look at that picture and imagine the tremendous combustion forces and explosions that occur in each of the cylinders, you can see how the open deck configuration would not be best from a performance standpoint. The cylinder becomes unstable and it becomes easier to blow a head gasket.
What S&R did was to weld in billet aluminum into the top of the cylinder cooling passages and create a closed deck block. That's actually pretty cool. I've never seen anyone do that before. The new welded in billet pieces strengthen the block and make it much more resistant to twisting and blowing head gaskets.
Here's the picture after the billet pieces have been welded in. Looks like the block will have to be decked again to clean things up. I hope Bobby posts another picture of the block after it's been decked again. You'll be surprised at how cool it will look.
When you first look at it, it seems like that would cut off the circulation from the cylinder heads. That's what Danny originally asked about. It turns out that these passages do not pass through into the cylinder heads, so there is no actual loss of cooling ability. I suppose technically the coolant doesn't go quite as far up the cylinder as it used to, but it's only slightly less (the thickness of the welded in billet shim).
07-24-2009, 10:51 AM
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Thanks Hal....stole your pic
Here's what I am referring to......
Here is your setup that you are planning
Here is the VR38 (GTR motor) that looks very similar....except they still have water passages around the bores......I'm just curious what kinda temps you are going to get in the motor.....well water temps won't be high cause there will be no water going near the cylinders.....but those cylinders will be crazy hot (like possible warping aluminum head hot), with no cooling other than fuel.
Just my thoughts
Tom
Here's what I am referring to......
Here is your setup that you are planning
Here is the VR38 (GTR motor) that looks very similar....except they still have water passages around the bores......I'm just curious what kinda temps you are going to get in the motor.....well water temps won't be high cause there will be no water going near the cylinders.....but those cylinders will be crazy hot (like possible warping aluminum head hot), with no cooling other than fuel.
Just my thoughts
Tom
07-27-2009, 03:17 PM
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Here are some updated pics of the block being cut. We have started drilling holes for the coolant passage.
looking more like a VR38
looking more like a VR38
Last edited by S&R Performance; 07-27-2009 at 03:18 PM.
