In a quandry, need opinions
02-29-2012, 06:33 PM
#33
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Me too. Running arp2000's on my stock headgasket with 165,000km's and I see 75psi all the time. I would think 625's would be plenty. Guess it all depends on the cylinder pressures.
03-01-2012, 09:50 AM
#34
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I would run a two stage nos system. One with a small spool jet (in the primary/secondary charge pipes) and one with the power jet (progressive controller) on a rail directed into the intake ports. Thats how I want to rig mine system up, might even rig up a small third jet.
Just found any kinda of turbo boost control gets diffcult once you start to spray.
You might have to do some testing to get the gates configured.
The block surface and head surface have been machined to a higher tolerance than what the factory has ever dream to give us. Typically we cut .003 to .005 just get the deck true again. Some need more, some need less. Orings protrusion makes the valve/piston clearance more tricky. The typical MLS gasket is (standard head gasket) 60-63 thou. Cutting the head, just brings the valve closer to the piston.
Just found any kinda of turbo boost control gets diffcult once you start to spray.
You might have to do some testing to get the gates configured.The block surface and head surface have been machined to a higher tolerance than what the factory has ever dream to give us. Typically we cut .003 to .005 just get the deck true again. Some need more, some need less. Orings protrusion makes the valve/piston clearance more tricky. The typical MLS gasket is (standard head gasket) 60-63 thou. Cutting the head, just brings the valve closer to the piston.
03-01-2012, 12:38 PM
#35
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I have been, and will in the future be running a nitrous express progressive boost controller. (boost reference) I have 2 very large .125 solenoids hooked up. The controller allows me to run what ever percentage of these controllers I wish at any given time or distance. My plan is really only running about 10% of one solenoid at 1# of boost, this brings the boost up very quickly for launch. At this moment I do not plan on adding much extra for the rest of the run (basically being a almost fuel only run) I still believe that I will be able to run very low 10's like this, and once I get the suspension tuned in high 9's, which then will allow me to add about 500 hp of nitrous if the need arises.
03-01-2012, 03:27 PM
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03-03-2012, 05:14 PM
#39
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At 100+psi of boost I would think about a custom copper head gasket. Once the head/block gets straight, trued, sealing is alot easier. We just measured our last engine build, we had 0.001 thou difference between protrusion. The block had a 0.010 cut on the deck and the head was re-surfaced/oringed.
Stock block, worst we seen was a difference of 0.010 thou between #1 and #6 piston
Stock block, worst we seen was a difference of 0.010 thou between #1 and #6 piston
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