Simon
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| posted on 20/6/06 at 07:09 PM |
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Hypothetical cooling Q!
Chaps,
My water temp was fluctuating - on start it would creep up to about 100 deg, then back to 80 deg and settle at 90. That was fine, but in this really
hot weather, it's been creeping back up to 95.
Night before last, I swapped thermostat for a new one (also 82 deg), but I drilled six 4mm holes around the thermosta perimeter.
It been better, for the most part running around low 80's.
However, and this is the hypothetical bit, if I'm driving at low speed (20-30mph stuck behind tractors and buses), and I have a tail wind of
similar speed, would my temp increase (bear in mind my fan switch needs relocating, so I'm using a manual switch at mo!!!!).
Also, would I be wise the bin the mesh grille I fitted, and fit an 8 bar grille (bars are 10mm dia), similar to what Luego used. I think it'll
be less restrictive.
Cheers v much.
ATB
Simon
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Agriv8
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| posted on 20/6/06 at 08:27 PM |
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Totally romived the guts from my thermostat ( but kept the ring ) may have to rethink for over winter motoring and keep an eye on my water temp
gauge
I need to wrap my exhausts as I feel this is causing huge under bonnet temperatures got some coming this week
running slow will knock mine upto 95 - 100 before the fan cuts in and cools things back down. 1450 cfm fan
a radiator cowel to force air through radiator work well but only above 30 estimated mph. but this does make sure that the fan puls cool air rather
than recurclated warm from the engine bay
regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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mark chandler
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| posted on 20/6/06 at 08:27 PM |
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Hi Simon,
If your radiator is marginal then the engine load/speed of cooling could mean that it may overheat at 30mph.
Whe racing land rovers we used water wetter in the system as mud could easily block the rad and cause a boil up half way around.
Linky
Before throwing away the grill try a bottle, its something that I can promise really works... and I was skeptical until I saw the results.
The other big difference I noticed was ducting cold air into the intake, this stopped pinking at full load and the car ran cooler.
Regards Mark
[Edited on 20/6/06 by mark chandler]
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Stu16v
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| posted on 20/6/06 at 08:44 PM |
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And not forgetting that the air you manage to channel through the rad needs to come out somewhere too.... 
Dont just build it.....make it!
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Simon
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| posted on 20/6/06 at 09:36 PM |
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Agriv8
Yeah, got my exhausts wrapped and the radiator is "blocked" in - no air can escape around radiator
Mark,
Been looking into the water wetters (like you, been a bit skeptical). Might have to try, especially as sometime towards end July, I'll also have
to cool a pair of turbos
How's you build coming on?
Stu,
Appreciate that, though bonnet will be subject to reshaping/moulding as once I have the EFI/turbos on I won't need scoop (in its present form).
I'm planning on redoing side panels in ally, the engine compartment ones will have a 2" gap at the rear, and may also be stepped at the
front too (behind radiator).
So much to do
Cheers chaps
ATB
Simon
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Agriv8
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| posted on 20/6/06 at 09:42 PM |
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Can second water wetter, used this in many race cars over the years.
I am also going to try running some of the moddern non mix red long life coolant comma do one
but the v8 mg lot harp on about somthing called 'Forlife'.
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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mark chandler
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| posted on 20/6/06 at 10:08 PM |
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Hi Simon,
All majors completed, last big one was exhaust so just panelling up, a few wires and brake lines then ready for a track day, another two months should
do.
Made buck free wings and following your advise, bloody kids have lost my camera lead so I cannot post..... cost £50 for all 4 !
Regards Mark
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froggy
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| posted on 20/6/06 at 11:28 PM |
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cant add any more advice but the best v8 cooling setup i have ever used was in my old v8 avenger which had a 4core rad similar sized to what you could
get in the nose of a seven and this was shrouded but i used a 16" engine driven fan and it never once went above 80c . not great from a power
consumption point of view but the constant pull of air through the rad at lower speeds kept it proper cool . i used a 16" kenlowe on a 109 v8
landy and set the stat switch to come in at 70c which helped in the summer but marginal rad sizes and rover v8s dont mix from my experience. i think
the solid fan setup also shifted so much air at lower speeds it also kept the engine bay cooler getting rid of all the heat from the block . the v8
westy has a different idea for ducting the hot air out of the rad and it seems to work for them?
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Kodiak
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| posted on 21/6/06 at 06:38 AM |
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Water Wetter does work and is worth a try. If there is a major problem especially with a hot running turbo engine have a look at the Davies Craig
electric water pump and controller. The electronic controller sets the pump speed to suit, hotter the engine is - the faster the flow. Good for fast
warm ups as well as it slows the pump right down. Hot shut downs you can have the pump run on to stop heat soak.....and best of all, frees up 4 to 6
HP wasted by the standard (removed) pump. (Davies Craig claim up to 15 but think that is a bit of a stretch).
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02GF74
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| posted on 21/6/06 at 08:00 AM |
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quote:
Originally posted by froggy
i used a 16" kenlowe on a 109 v8 landy and set the stat switch to come in at 70c which helped in the summer but marginal rad sizes and rover
v8s dont mix from my experience. i think the solid fan setup also shifted so much air at lower speeds it also kept the engine bay cooler getting rid
of all the heat from the block . the v8 westy has a different idea for ducting the hot air out of the rad and it seems to work for them?
tell me about it I am still using the series 3 rad - probably marginal but have 16 in fan in front, bonnet vents - you can just about make it out
in the piccy <-- and a second smaller fan behind the radiator that helps pull hot air from the engie bay via the vent. Also using watter wetter,
have an oil cooler and fitted a smalleer water pump pulley. So far all has been well but need to ghet it ou in the current warm wether (it has not
boiuled over but on the hotest day every about 2 yrs ago, the temp was hitting 110 oC
what is the westie way you mention?
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MikeRJ
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| posted on 21/6/06 at 08:57 AM |
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quote:
Originally posted by Agriv8
but the v8 mg lot harp on about somthing called 'Forlife'.
Forlife is the pre-mixed coolant that Toyota use, especialy in the imports. It is bloody expensive (cost me ~£40 to change the coolant in my MR2
Turbo, though it holds a lot) and you must not mix it with other coolants.
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