css block guards?
#1
Registered User
Thread Starter
css block guards?
From some simple searches, it seems that the stock sleeves start to oval around 850 whp (vq35de), of course one solution is the darton sleeves
How do the css block guards perform? Some of the Honda guys claim it helps with reliability and is a viable solution (Google search)
Material is 6061 aluminum, so yield strength isn't particularly high however it may prevent this "ovaling" of the stock cylinders at a reasonable power level (950-1000 whp?), due to the tight fitment...
Thanks for your input
How do the css block guards perform? Some of the Honda guys claim it helps with reliability and is a viable solution (Google search)
Material is 6061 aluminum, so yield strength isn't particularly high however it may prevent this "ovaling" of the stock cylinders at a reasonable power level (950-1000 whp?), due to the tight fitment...
Thanks for your input
#5
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seems they are not well liked in other communities such as honda. well at least the cheaper drop in block guards. supposedly they are made of a different metal and expand differently with heat, so they actually cause the cylinder to oval because of that. Essentially those RJM closed deck blocks are just a more precision version of this. They are more precisely cut block guards, with what I am guessing is a metal matched to the block material, and then the top is machines flat.
#7
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Thread Starter
If your cylinders are going to oval would a half inch of aluminum at the top of the block really prevent that?
https://cylindersupportsystem.com/
https://cylindersupportsystem.com/
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#8
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#9
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#10
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#11
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seems they are not well liked in other communities such as honda. well at least the cheaper drop in block guards. supposedly they are made of a different metal and expand differently with heat, so they actually cause the cylinder to oval because of that. Essentially those RJM closed deck blocks are just a more precision version of this. They are more precisely cut block guards, with what I am guessing is a metal matched to the block material, and then the top is machines flat.
CSS VQ block
RJM VQ block
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BluestreamDE (01-25-2019)
#12
Registered User
I agree that a flat surface is more desirable for a better head to block seal and mating surface. If i was given a choice between the two companies, RJM would get my monies. Not knocking CCS as it looks like a good alternative, perhaps for milder setups. Good info in this thread for what we all know soo far.
Last edited by BluestreamDE; 01-25-2019 at 02:04 PM.
#14
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#15
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Rzg motorsports apperently used these css block guards for two vq35de
"1000 whp rating" and will be proven if it works shortly, I am in contact with one individual who has this install
"1000 whp rating" and will be proven if it works shortly, I am in contact with one individual who has this install
#16
350Z-holic
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Cengineer ... I volunteer you to get the block guard and do a full gamit of research, testing, and development and return to us with a full report and results...
that will be all
all joking aside - you should do it, start a thread and become the matter-expert on it.
that will be all
all joking aside - you should do it, start a thread and become the matter-expert on it.
#17
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iTrader: (23)
In the End, not that much cheaper than Sleeves
I think the reason why this block guard is attractive is because you do not have to machine the block for the darton sleeves (so saves money and is quicker installation) but also because there is a faint promise that the 800-900 whp will be reliable. This figure (I'd argue) is also plenty for most weekend cars
#18
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I think you can get a whole RJM closed deck block for around $1400-$1700.....sleeves alone are around $1200.... and a whole Mazworx darton sleeved block is $2800 seen here Mazworx darton block. I keep getting pulled back and forth as far as what direction to take with my engine build.....very reputable shops telling me to keep it simple and do pistons and rods only due to them seeing issues with the darton sleeves not being properly installed/machined causing multiple problems.....then hearing the exact opposite with no problems with the closed deck blocks offered by RJM and CSS. Basically I'm about to spend another $8500-$10000 for someone to build a complete longblock assembly for me and I don't want to get burned.........I just don't know what direction to take on all this.
#19
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I hear You!
What kind of Power are you looking for? Just for Street or?
I have a few friends WITHOUT Sleeves or a closed deck that do just fine. And they beat on their motors Hard to 8000rpm. In the 700-800+ WHP
Unless you are planning on making more than that, then a stock block is just fine. As long as it's put together Correctly......
What kind of Power are you looking for? Just for Street or?
I have a few friends WITHOUT Sleeves or a closed deck that do just fine. And they beat on their motors Hard to 8000rpm. In the 700-800+ WHP
Unless you are planning on making more than that, then a stock block is just fine. As long as it's put together Correctly......
I think you can get a whole RJM closed deck block for around $1400-$1700.....sleeves alone are around $1200.... and a whole Mazworx darton sleeved block is $2800 seen here Mazworx darton block. I keep getting pulled back and forth as far as what direction to take with my engine build.....very reputable shops telling me to keep it simple and do pistons and rods only due to them seeing issues with the darton sleeves not being properly installed/machined causing multiple problems.....then hearing the exact opposite with no problems with the closed deck blocks offered by RJM and CSS. Basically I'm about to spend another $8500-$10000 for someone to build a complete longblock assembly for me and I don't want to get burned.........I just don't know what direction to take on all this.
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knuckles899 (01-28-2019)
#20
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Shooting for 650whp hopefully using 91oct low boost and 750-800whp hi boost using e85 or high oct race fuel. Fueling will utilize CJM S3 kit twin pump......was told by CJM new twin pump should be available around March or April. Haven’t determined injectors yet. Trying to keep it all tuned with Uprev as I sold my Haltec EMS.
I plan on doing the Shift S3ctor air strip roll racing events but will still drive it on the street occasionally. Currently running the 350z HR BP single turbo kit 11psi 440whp stock block on a mustang dyno but have ran it a dozen times at 14.5 psi 104 oct so unsure on how much more HP there was. All supporting mods done clutch,wheels,tires,brakes etc etc.
I plan on doing the Shift S3ctor air strip roll racing events but will still drive it on the street occasionally. Currently running the 350z HR BP single turbo kit 11psi 440whp stock block on a mustang dyno but have ran it a dozen times at 14.5 psi 104 oct so unsure on how much more HP there was. All supporting mods done clutch,wheels,tires,brakes etc etc.
I hear You!
What kind of Power are you looking for? Just for Street or?
I have a few friends WITHOUT Sleeves or a closed deck that do just fine. And they beat on their motors Hard to 8000rpm. In the 700-800+ WHP
Unless you are planning on making more than that, then a stock block is just fine. As long as it's put together Correctly......
What kind of Power are you looking for? Just for Street or?
I have a few friends WITHOUT Sleeves or a closed deck that do just fine. And they beat on their motors Hard to 8000rpm. In the 700-800+ WHP
Unless you are planning on making more than that, then a stock block is just fine. As long as it's put together Correctly......
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OldManZ350 (01-29-2019)