Running hot
Cody Forbes
cody at 5000tq.com
Mon Jun 1 20:15:58 PDT 2015
The small pumps from the non-turbo cars are quiet, but the 044/040 pumps are loud. Even the in-tank ones in a 5000 can be heard over the engine at idle. It's a seriously massive flowing pump, the highest flowing electric pump Bosch has ever made and higher flowing than many racing pumps; it's going to make some noise just due to the size and power plus the sheer volume of liquid flowing.
-Cody Forbes (mobile)
> On Jun 1, 2015, at 10:29 PM, Huw Powell <audi at humanspeakers.com> wrote:
>
> Weird. I think what happened is I googled what you called it, and what turned up was a copy or knock-off of the Bosch unit.
>
> I wonder why it is so loud? The stock pump in that car should be dead silent, or at least no louder than the lifters ;)
>
> - Huw
>
>> On 6/1/2015 10:04 PM, David Vanden wrote:
>> It isn't a copy. It is a real Bosch! It came in A Bosch Box and it
>> says Bosch right on it. I don't know where the assumption came from
>> that I was using a copy.
>>
>> My only caveat with it is its noise level. Which makes me wonder
>> whether I should drop another fifty bucks at some point when cash flow
>> is better,on a silicone "silencer cradle". I wonder if they really work
>> and whether they could cause it to overheat, being a relatively new and
>> untested concept. Anyway, that is enough for tonight. My mind can only
>> absorb so much information.
>>
>> On Mon, Jun 1, 2015 at 9:58 PM, Cody Forbes <cody at 5000tq.com
>> <mailto:cody at 5000tq.com>> wrote:
>>
>> I did, you musta missed it much like I missed it being a copy rather
>> than a real Bosch 044 which is what I thought he said ;-).
>>
>> I'm 100% certain without a doubt that a real Bosch 044/040 is CIS
>> capable and that it is undoubtedly the stock pump in a 5000 Turbo.
>> At EFI pressures (lower than CIS, therefore more flow) I'm still
>> using the stock Bosch 040 (in tank) pump to exceed 600hp. The only
>> question on his at this point is how good of a copy it is I suppose.
>>
>>
>>
>> -Cody Forbes (mobile)
>>
>> > On Jun 1, 2015, at 9:37 PM, Huw Powell <audi at humanspeakers.com
>> <mailto:audi at humanspeakers.com>> wrote:
>> >
>> > Ah, Cody, why didn't you correct me before I said that twice?
>> >
>> > Are you sure about the pump he bought, though? I saw nothing
>> about 120 PSI in the description. Keep in mind it was not a Bosch,
>> but a copy, IIRC. The highest pressure mentioned was 5 bar.
>> >
>> > I'm pretty sure they also use a power resistor to make the low
>> speed, but the ones on the small cars don't have a reputation for
>> burning out. That said, there's no harm in testing it.
>> >
>> > - Huw
>> >
>> >> On 6/1/2015 9:08 PM, Cody Forbes wrote:
>> >> I assure you Huw ol pal that the 044 pump is indeed proper for
>> any CIS car. There's the 040 and the 044, one being the in tank
>> version and one being the external version. They are identical in
>> specification and rated to flow at pressures exceeding CIS system
>> pressures. Again, the in tank version is the OE pump on a 5000
>> Turbo. A fuel pump is a fuel pump as long as it will flow enough
>> fuel at high enough pressure to let the pressure regulator do its
>> job. Flow rate is inversely proportionate to pressure (as pressure
>> goes up, flow rate goes down) so you've got to be sure it can flow
>> enough at 120psi for CIS and the 044 pump absolutely, unequivocally,
>> unquestionably, can.
>> >>
>> >>
>> >> On the fan noise:
>> >> Do these have the same big cooling fan resistor as the 5000's? I
>> know on the 5000's the resistor burns out on low speed and you end
>> up with only high speed which is very loud. Also on the 5000's there
>> are different fan options with 3, 4, and 5 blades. The more blades
>> the quieter the fan at similar flow rates. Perhaps the small chassis
>> cars also have different blade quantity options to look in to?
>> >>
>> >> -Cody Forbes (mobile)
>> >>
>> >>> On Jun 1, 2015, at 8:41 PM, Huw Powell <audi at humanspeakers.com
>> <mailto:audi at humanspeakers.com>> wrote:
>> >>>
>> >>> You might want to test your radiator fan sender doohickey (if
>> that's what you mean by "new temperature sensor then you're all set).
>> >>>
>> >>> It's a two-speed fan, and "high" is pretty loud. "Low" is not
>> so bad, but if the sender is partly bad you might have high only.
>> That makes it louder, and also a bit hotter before it comes on.
>> >>>
>> >>> The fan should almost never come on while you are moving, but
>> idling on an 80F+ day it will cycle on and off every couple of minutes.
>> >>>
>> >>> I'm wary of your concept of "superior", since you already put
>> the wrong fuel pump in your car...
>> >>>
>> >>>> On 6/1/2015 8:23 PM, David Vanden wrote:
>> >>>> It hasn't overheated. I refuse to drive it until I at least
>> get the
>> >>>> radiator cleaned and install the new temperature sensor. I
>> removed the
>> >>>> radiator from the car. It seems to have a lot of gook inside.
>> >>>>
>> >>>> I just liked the idea of a superior radiator because I get
>> annoyed with
>> >>>> it not running cooler and with the cooling fan coming on so
>> frequently.
>> >>>> I figured if there was a way to quiet the cooling fan and not
>> be so
>> >>>> reliant on it it would be cool
>> >>>>
>> >>>> On Mon, Jun 1, 2015 at 8:01 PM, Huw Powell
>> <audi at humanspeakers.com <mailto:audi at humanspeakers.com>
>> >>>> <mailto:audi at humanspeakers.com
>> <mailto:audi at humanspeakers.com>>> wrote:
>> >>>>
>> >>>> This Nissen's:
>> >>>>
>> >>>>
>> http://www.partsgeek.com/catalog/1987/audi/4000_quattro/cooling_system/radiator.html
>> >>>>
>> >>>> is what people have been using "forever". Direct fit, but does
>> >>>> require a "universal" corrugated top hose since for some
>> reason the
>> >>>> hose nipple is a couple of inches further from the engine.
>> >>>>
>> >>>> I cut two original hoses and joined them with a stainless steel
>> >>>> barbed fitting, but that's not necessary, it was just fun
>> to do.
>> >>>> And cheaper.
>> >>>>
>> >>>> I don't know if people have used the other radiator shown
>> there.
>> >>>>
>> >>>> Has your car overheated yet?
>> >>>>
>> >>>> - Huw
>> >>>>
>> >>>>
>> >>>> On 6/1/2015 6:26 PM, David Vanden wrote:
>> >>>>
>> >>>> This question may be perhaps rhetorical but did anyone
>> install a
>> >>>> Flex A
>> >>>> Lite universal fit radiator, see significant
>> improvement, and do
>> >>>> so without
>> >>>> spending a lot of money on mounting hardware?
>> >>>>
>> >>>> On Sun, May 31, 2015 at 11:57 PM, Andrew Buc
>> <abuc at andrewbuc.com <mailto:abuc at andrewbuc.com>
>> >>>> <mailto:abuc at andrewbuc.com
>> <mailto:abuc at andrewbuc.com>>> wrote:
>> >>>>
>> >>>> Your 4kq is old enough that the odds are pretty good it
>> >>>> needs a new
>> >>>> radiator. I had the radiator on my ’87 4kq replaced
>> 2 or 3
>> >>>> years ago. In my
>> >>>> case, the issue was coolant loss, not overheating
>> (I started
>> >>>> carrying jugs
>> >>>> of coolant in the trunk and topping up as needed),
>> but still.
>> >>>> _______________________________________________
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>>
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