what is the stock boost on a 87 930?
#1
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Hello
I have a friend that is looking into a 87' 930. I drove the car, very nice. What kind of boost should I be seeing on the gauge, and also at what rpm. How can I check to see it is getting the correct boost. Any thing else he should check for? Thanks in advance.
I have a friend that is looking into a 87' 930. I drove the car, very nice. What kind of boost should I be seeing on the gauge, and also at what rpm. How can I check to see it is getting the correct boost. Any thing else he should check for? Thanks in advance.
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#3
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Full boost will be around 4500 rpm's. If I remember correctly only when my car was stock did I get an accurate reading from the built in boost gauge (I think). The problem is the sensor is before the thottle plate. If your friend likes the car then have a mechanic check it out before he buys.
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I rarely got full boost in first. The gearing had me getting to red-line so fast that full boost was rare. The rest of the gears - absolutely.
An inexpensive (relatively) way to lower the RPM at which the turbo spools is to buy an after-market header / muffler set up. I'm sure the Rennlisters reading will chime in with their recommendations.
Dan
'89 930 3.4 (recently sold)
An inexpensive (relatively) way to lower the RPM at which the turbo spools is to buy an after-market header / muffler set up. I'm sure the Rennlisters reading will chime in with their recommendations.
Dan
'89 930 3.4 (recently sold)
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Not to mention that the stock boost gauges are notoriously inaccurate. I have a digital boost controller in my car and it gives me very accurate readings. It will be reading around .5 - .6 bar when the stock gauage is reading 1 bar.