Boost still low
I have a similar problem. Just got mine back today w/similar setup only LS6 intake, stock tb, 65lb Mototrons, 3.7 pulley, other stuff in sig, and very conservative tune 17 degrees timing, -0- knock, IATs 118 degrees max @ 95 ambient temp and 30% humidity. Seeing 6psi w/552 rwhp/540lbft. No discernable belt powder. Also blew dipstick. Have catch can that is fed from the stock LS1 PCV tubes (PCV is LS6 setup) then goes to the S/C hat. Engine is definitely getting pressurized. Could it be flowing so well it uses all this airflow and only makes 550/540? S/C rpm is ~51860, or ~83.65% of max (62000) = ~1100cfm (~83.65% of 1400cfm).....does this look right?
Sorry, 1FASTLS, I don't mean to hijack your thread, but I was going to start one when I found yours and I think we may both benefit from this added info. Just let me know, and I will butt-out.
Thanks
Sorry, 1FASTLS, I don't mean to hijack your thread, but I was going to start one when I found yours and I think we may both benefit from this added info. Just let me know, and I will butt-out.
Thanks
either your pcv system isn't working properly or you have toasted a ringland and you're getting blowby which means you have to tear her down and rebuild. Hopefully it isn't the latter. It almost sounds like your sc is out of breath but it shouldn't be.
Originally Posted by Got Me SOM
either your pcv system isn't working properly or you have toasted a ringland and you're getting blowby which means you have to tear her down and rebuild. Hopefully it isn't the latter. It almost sounds like your sc is out of breath but it shouldn't be.
Thanks
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Joined: Jan 2005
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From: Orlaanndoooo
Launching the dipstick is a dangerous sign of excess pressure in the crankcase....whether it is from excessive blowby or the crankcase receiving pressure from the PCV valve. This sounds like your most pressing problem at the moment....get this solved and then worry about how much boost you are making.
Originally Posted by 1FASTLS
Need some advice only 7psi with D1sc 8 rid with the smallest pulley they have (3.4) went threw all touble shooting procedures.HELP
Awake455, as stated above, I have already contacted my installer and the check valve will be installed in the PCV hose tomorrow. However, I still need to know if I should be seeing more power with this setup. Hopefully, some of the guys that have had the SDCE 8-rib setup for a while will chime in and voice their opinions based on what they have seen. If needed, I would like to order a new pulley tomorrow and would like to know what size to get. I know SDCE sells the 3.4, but I think there may be others who make a smaller 8-rib compressor pulley; 3.2, 3.0, 2.8, etc.
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Originally Posted by 1FASTLS
Need some advice only 7psi with D1sc 8 rid with the smallest pulley they have (3.4) went threw all touble shooting procedures.HELP
One is if you are using the ATI aluminum bracket, you are having slipage. There is no question. If this is the case, pull the blower off the car, and examine the bracket. Look in the holes, and you will see the grove marks made by the bolts as the bracket was flexing. In order for the blower to perform to its potential, the blower must be in a fixed position.
www.truetechperformance.com, can help because they have a steel version of this bracket. This solved all of my issues with the belt.
#2
Quit using cheap belts. Goodyear gatorback has a belt that is groved long ways and side ways. allows the belt to flex better around the pulleys.
#3 Larger crank pulley. 8"
#4 Weather. The hotter it gets outside the less boost you are going to see. IC or not.
#5 If you are using that dinky blow off valve that ATI sells, make sure you have the vaccum lines connected correctly.
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Originally Posted by 1bad2k2ta
Not likely, at least in my case, brand new all forged bottom end w/1800+ break-in miles, -0- knock, no overheating, no choo choo puffs from the oil filler, and no smoke out the back. But talked to my installer and he did not put the check valve in the PCV as requested. So, that is the first thing I will do, along with ordering the 3.4 pulley (or smaller if I can find one). The check valve should hopefully stop the dipstick from launching, but I am still unsure as to whether I should be seeing more power.
Thanks
Thanks
This is suppose to assist with removing the excess crank case pressure. It is not 100% effective but it did work for me making 16PSI.
Originally Posted by Bryan Wilkinson
Do you have the vaccum line connected that runs from the valve cover to the inlet side of the blower? This line is probably about 1/4"
This is suppose to assist with removing the excess crank case pressure. It is not 100% effective but it did work for me making 16PSI.
This is suppose to assist with removing the excess crank case pressure. It is not 100% effective but it did work for me making 16PSI.
Originally Posted by 1bad2k2ta
Yes, I have the stock LS1 PCV tube coming from the driver side rear valve cover around the back, as usual, the passenger side rear barb plugs in as usual, but instead of connecting to the intake, it goes to a catch can, then to the S/C hat.
Is there a possibility, that with the catch can being there that it is not allowing the intake side to pull enough vaccum from the crankcase? I know why you are using it, but in my case I had not used one.
Originally Posted by Bryan Wilkinson
Is there a possibility, that with the catch can being there that it is not allowing the intake side to pull enough vaccum from the crankcase? I know why you are using it, but in my case I had not used one.
Originally Posted by 1bad2k2ta
The catch can is really just a precaution to keep oil, sludge, etc. out of the S/C and intercoolers. I haven't checked it since it blew the dipstick, but it didn't collect anything at all during tuning. During normal operation (n/a) it should provide enough vacuum to help purge the engine of anything the PCV is not handling. During boost, it will likely be more pushed from the valve covers since the PCV will be shut, than it will draw, due to the small tube size, as you said.