Gtech vs Reality (track)....again VERIFIED....new data!
#25
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Originally Posted by willwren
Notice the difference between the 2nd gear shifts from the first two runs yesterday (hot) and the 2nd two this morning (cold)?
Quite obvious.
Quite obvious.
#26
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Cold shifts are brutal. By cold, I mean cold trans, has nothing to do with ambient air temp. Need to get the trans to 200°F before the shifts smooth out.
#27
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Originally Posted by willwren
Cold shifts are brutal. By cold, I mean cold trans, has nothing to do with ambient air temp. Need to get the trans to 200°F before the shifts smooth out.
#28
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A new trans would solve my problems. jr's3800 has had the same prob on his 95 for about a year now. The problem is that I'm producing more torque than him, and my diff and the rest of the drivetrain is being hammered by those shifts. I'm fearing that something has to give.
#29
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Temp/Humidity and Power
I think intake temps effect power - even without KR. Hence, you always need to factor this into comparision of acceleration times. The higher temps result in a less dense air charge, and hence less pontential power. Humidity further compounds this, as a given volume of air is not only less dense but more water vapor.
This is why cars run much better in cool dry weather, regardless of KR or even intercooling.A truly cold intake charge has more mass and less proposentity to detonate. Hence you get more power from both reduced kr/increased timing and denser air/fuel mixture.
An intercooler reduces the temp of the pressurized air from the blower - thus probability of detonation and KR at a given boost/octane level, but can not increase the mass of supercharger output. Our supercharger is also a positive displacement blower. Hence it also does not compress the air but pushes a fixed volumn of outside air into the engine. The boost pressure essentially messures the compression created at the intake manifold from forcing in additional air, not compression (density) of intake charge within the supercharger.
Nitrous actually works by creating a truly denser cool intake charge. The NO2 has a higher oxygen density than external air.
This is why cars run much better in cool dry weather, regardless of KR or even intercooling.A truly cold intake charge has more mass and less proposentity to detonate. Hence you get more power from both reduced kr/increased timing and denser air/fuel mixture.
An intercooler reduces the temp of the pressurized air from the blower - thus probability of detonation and KR at a given boost/octane level, but can not increase the mass of supercharger output. Our supercharger is also a positive displacement blower. Hence it also does not compress the air but pushes a fixed volumn of outside air into the engine. The boost pressure essentially messures the compression created at the intake manifold from forcing in additional air, not compression (density) of intake charge within the supercharger.
Nitrous actually works by creating a truly denser cool intake charge. The NO2 has a higher oxygen density than external air.
#30
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Streetracer, your thoughts are right in line with mine, and every other performance minded 3800 owner. The problem with this is that I drive a Series 1. There are no intercooler options available at ANY cost.
This is why version 4 of my water injection is now going back into my car. I'm using it strictly for the intercooling effects. As I type this, my custom-fabbed (4th in two years) tank is doing a leak-down presssure test from 50psi. Tomorrow it goes to 150.
This is why version 4 of my water injection is now going back into my car. I'm using it strictly for the intercooling effects. As I type this, my custom-fabbed (4th in two years) tank is doing a leak-down presssure test from 50psi. Tomorrow it goes to 150.