1994-2002 [Subscribe to Daily Digest] |
I bought the Dawes MBC for my Volvo and the install was rather simple and very rewarding with a 45hp gain. For my NG900SET I decided to make the MBC myself and had help from the following site http://pages.cthome.net/gus/mike.html This uses the same hardware as the Dawes, but the cost is under $20. I bought enough materials to make several for my friends.
If you are having issues make sure you double check all your connections and how you have hooked up the unit. Did you make sure the end with the drilled 0.020" relief hole is facing the waste gate actuator? This is very important. You may want to check the hoses as the Dawes unit will NOT accept the stock hoses used in Saabs (they are too big). You can buy adapters at Autozone for $1.49 each and this makes the install easier. Did you remember to zip tie all connections? Remember, these lines are under pressure, so any connection that is compromised can caused problems.
Because the Dawes devices uses a simple off the shelf check valve (that is reversed to act like a pressure bleed valve) I find it hard to believe the unit is defective or needs the spring stretched. The spring is rather robust and should not cause any issues. The spring as shipped, provides more than enough force to hit the fuel cut-off and should not require any stretching, this make me think you have other issue(s).
Dean provided some very good install details of his MBC upgrade and I am providing these for you (all credits do go to Dean for the original post).
Here they are:
The instructions with the MBC are mostly what you need. See the univeral install for single turbos. The hose from the turbo compressor housing hose barb is removed from the BPC valve which is near the right head lamp. This is connected to the inlet port on the HBC. That is the port that is inline with the adjustment knob's shaft. The outlet port of the HBC then connects via the HBC supplied hose to the wastegate actuator. So you need to remove the original hose from the wastegate actuator, and place that end of hose over the now vacant hose barb on the BPC valve. That will keep the BPC valve clean and preserved.
That is the basic plumbing. You will have to remove the small dia hose that comes fitted to the HBC outlet, and replace with the larger hose that comes with the kit. Remember that the outlet is the one at 90 degrees to the body. The instructions should also point that out.
You may need longer hoses, you can get hose from the hardware store or auto parts stores. You need to locate the valve so that you can make adjustments and not get burned doing so. Route hoses to avoid the exhaust manifold. You can fasten the valve with wire ties, you may want to prurchase some more than what comes with the kit. Shorter hose lenghts are prefered.
Follow the adjustments details inthe HBC instructions. You will NOT NEED to reset the ECU after hiting the fuel cut pressure. The BPC valve remains connected to its wiring.
Do not cut any factory hoses or remove the factory hose from the turbo compressor hose barb. Use hose couplers to splice for greater length.
You will need to reduce boost in the cooler or cold months as the boost pressure will overshoot and hit the fuel cut pressure.
Hope this helps.
posted by 209.122.236...
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