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#12
01-13-2009, 01:57 PM
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PT
That's the issue.......... I'm right at the edge of what the OEM cooling system can handle. At this point I'm running 8.5lbs boost, we have cut pulley once from the previous set up and I'm happy with HP increase. Two issues have come up.... one is cooling on hot days and the other is the torque converter/tranny under heavy load throws codes now and then. I have looked at a water methanol set up however, not sure that is route I want to go plus then it adds to HP issue with torque and tranny. I'm interested in every option available even those that don't seem obvious... Todd B 
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#14
01-13-2009, 04:14 PM
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Quote:
It may be that 4.6's simply have a pusher fan instead of a puller? I've never looked under the hood of one to compare. 
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#15
01-13-2009, 04:43 PM
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Whatever you do will put further load on almost every system. One thing you can do is try to get the thermostat to open sooner. If you can accomplish that then you can add a toggle switch for the pusher fan so you can turn it on manually when you want some extra cooling.
The other thing I’d look at is an oil sump and larger cooler. Getting that oil cooled down fast will reduce the water cooling system load and might get you some cooler temps.
__________________
- 335i E92 2007 [Sapphire Black/Coral Red] - X5 E70 2013 [Sparkling Bronze/Cinnamon] "Living the dream" 1981 Delorean #6489 
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#16
01-13-2009, 04:54 PM
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Cleaner,
Good points... I have been in contact with Dinan about an high volume oil cooler and and additional tranny cooler. They seem to have bigger things on their plate right now. Thanks, Todd B Last edited by bigfish; 01-13-2009 at 05:01 PM.
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#17
01-13-2009, 05:01 PM
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fans............
JV,
My 4.6 has two fans, one smaller up front pushing and a larger one attached to motor pulling. It seems that the 4.8 was able to do away with front fan pushing. My 4.6s has a goofy fan shroud with little ports in it, looks like something of Mr. Magoo's car. It looks very restrictive in comparison to 4.8, My observation is that do to some change of 4.8 radiator cooling set up that air is moving more efficiently through the motor. My questions is what was that change and what did it accomplish? Thanks for your input, Todd B
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#18
01-13-2009, 05:27 PM
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Hey Todd,
From my experience, there doesn't seem to be an easily explicable rhyme or reason why each car comes from the factory the way it does. The front fan is usually an auxilary unit that's activated by the a/c since it's attached to the condenser. I can't tell from the blur in the picture but those ports look to be cooling flaps. Zionsville Autosport offers the same feature on some of their radiators - basically they just open up at speed to increase flow. The different routing may not be more efficient, it may just be out of necessity to accomodate room for everything since the motors are different. (Although i've never looked under a 4.6 hood to compare so that may or may not be the case) Perhaps it may have something to do with the 4.8 bumper having larger openings? Again, just hypothesizing.. Turning to Dinan probably isn't the wisest financial decision. You could certainly have a sweet Ron Davis radiator custom made for the same $, if not LESS that would probably be a better solution to your needs. You could also probably delete both fans and add an electric one from Spal similar to the 4.8. (I've done this to my M3) This would free up some space behind the bumper to add an additional/larger oil and/or tranny cooler as suggested above.
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#20
01-15-2009, 08:08 AM
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Quote:
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