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2332 porsche fan shroud cooling issues..

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cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#814879
i have a freind here in perth who bought alan herberts old beetle from qld, but he seems to be having issues with cooling..its a 2332cc,idas,wedge ports and a fk8...runs smooth as silk....but it gets 120deg realy easy,30 degree day and only 10 mins on the freeway...its running aporshe 11 blade and two big oil coolers with fans and air scoopes and a thermostat that opens at 90 deg...2 laps around barbagalo today, about 70 secons each lap it got to 125deg with a hoodjax...

anyone have any ideas,we are racing on sunday and would like to get this fixed before then...

thanks.....

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#814885
do you have correct qty of oil in the engine

what grade oil are you running ??

is the fan belt correct tension not slipping

are there any air leaks from the fan shroud tinware
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#814894
vw54 wrote:do you have correct qty of oil in the engine
yep
what grade oil are you running ??
not sure i will have to ask him,i know its a synthetic redline..

is the fan belt correct tension not slipping
fan belt good

are there any air leaks from the fan shroud tinware
i dont know much about porsche shrouds,but ill have a look and get back to u...

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 ·

#814895
what A/F ratio is it running ?


matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#814897
Craig Torrens wrote:what A/F ratio is it running ?
x2
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

empi Compulsive Aussie Vee Dubber

4,131 posts · joined Aug 2002 ·

#814938
What type of cooling are you running , what size crank pully? Photo of set up would be good.
"If at first you don't succeed, skydiving is not for you." - Anonymous 🥷

RISKY4LIFE Officially Full-On Dubber

308 posts · joined Jul 2010 ·

#814944
Craig Torrens wrote:what A/F ratio is it running ?
this might sound silly but what is A/F??

reub VWRX is gone...

2,054 posts · joined Sep 2002 ·

#814966
um....air/fuel ratio?
Reub

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#814991
"porsche fan" there's your issue, well at least half of it.

The fans are good but the shrouds are always problematic.

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

reub VWRX is gone...

2,054 posts · joined Sep 2002 ·

#815001
sharpbuilt shroud - considered to be the best on the market.
Alan also installed the porsche factory air deflector to help overcome hotspots...
Reub

Newt Wolfsburg Wizard

478 posts · joined Mar 2008 ·

#815020
EFI or Carby?
It is as it is - If you didnt enjoy today, you've missed the opportunity.

vlad01 Compulsive Aussie Vee Dubber

4,270 posts · joined Jun 2010 ·

#815031
One word!

DTM

71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#815035
I don't feel the fan is to blame, and if Alan fitted the Porsche air vane to the alternator, I think the problem will be lack of air supply (propped decklid kills that idea) or the tune up is not right.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#815080
thanks for the replys everyone..

im not sure about the a/f but i did tell him to tell the dyno guy to aim for 12.5 a/f with descent throttle...not sure what the outcome was though...all i know is it made 130@wheels, they did make 140whp but was to lean....so they jetted it for the 130whp....it runs realy nice with the ida's.... ill get him to ring the dyno guy.....

um, only other thing i can think of is his pissy little breather box which i told him to get a big 2ltr one made up as its spitting some oil from behind the pulley...so could it be buiding to much crank case pressure and thats whats causing the heat aswell??

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#815084
what about the engine to body compartment seal is this good and not allowing warm air to be sucked back in

is all the HOT air getting away from the engine ???

yep crankcase pressure will heat things up

is the muffler too close to the head so its transfereing heat to the engine

I am suggesting the above believeing that your engine is in a good tune up and running the correct air fuel ratio or a little FAT as you have suggested above

do like synthetic oils prefer the good old natural stuff out of the ground
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#815091
all the exaust is wrapped in exaust wrap and the muffler is in the std spot as usaul for a fat boy.... all the engine seals are new and sealed...have tried hoodjax and the bottom decklid out.....

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#815093
Where's the temp sender and what brand (is it accurate)??
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 ·

#815096
Hi

As Matt said, also make sure that the sender is the correct one for that gauge.

Steve

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#815350
well,whatever the problem is,is we cant find it...
called richerd at vforce and told him the jetting and we thought it had 135 mains, he said there is the problem u need at least 155 with the 180 airs.so i popped over jeffs place to have a look and it had 155's....ggrrrrr.....timing is at 32deg advanced but the plugs had at least 100 thou gap so we put new plugs in with 45 thou gap....not sure if plug gap has any affect on heat.... it also has a new 2ltr breather on.......so after these changes im not sure what to look for....

hellbugged 48's and straight cuts

5,080 posts · joined Apr 2003 ·

#815351
check the oil cooler fans flow correct direction.....with room for the hot air to "exhaust" away?

for me i'd be mounting the cooler on the front bumper......all our cars are done with that and it drops temp right back. just use an oil thermostat.

.........yeah i'd think bigger than 155 mains........

what are the idles?

that car had louvered boot lid?.......louvers facing down with porsche fan sucking in through them.......hmmmmmm.......

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#815360
Where's the temp sender....altho I agree, sounds too hot 👎
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#815382
matberry wrote:Where's the temp sender....altho I agree, sounds too hot 👎
its tapped into that plate that sits to the right and down a bit of the oil pump....its a vdo sender with gauge.....

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#815393
That's the best location, definately check the sender is correct for the gauge. VDO gauge so.......sender will have VDO and a part no. and a full scale *C number written on the spanner flats of the fitting. Check the full scale number *C matches the full scale reading on the gauge.....120* or 150* are the two VDO make.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 ·

#815430
I remember a while ago, when Alan owned the car, he ws having overheating probems,
but i thought he had solved them.
Perhaps it was fine while he was just putting around.

I am hoping it is an error with gauge or sender,
but for reference,
at the time, he tried changing the fan direction,
checked the gauge with some calibration thing from his work,
and even made some scoops for the cooler that apparently made good improvements.

Even his old 1775cc engine used to over heat,
so perhaps it is gauge or sender related.
westi wrote:That's mad Alan.

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 ·

#815436
The 155 main jet is more than big enough, being that it had only 37 venturis,
but I would hope that the dyno trip was able to determine whether the 180 air jet was not making it lean up high.

That engine runs tight deck height, so needs less ignition timing.
I would begin with a total figure of 28 degrees.
That is worth some heat.

Most of the castings on the 044s have a lot of casting flash,
so some careful action with a small drill can clear these areas for a little more through-flow.

Make sure the lower cylinder tin is attached to the upper tin to prevent back flow when the car is moving.

http://www.cbperformance.com/catalog.asp?ProductID=1339

Lately I have been removing the breather from he left rocker cover.
It is full of oil at anything above 3000rpm,
so I cap that one and add one to the case.(two total in case)
My own engine has no vents in the covers at all.
Nothing related to the temp prob, but a good way to stop oil all over your engine bay.

Lastly, those fans flow heaps of air,
so provided the pulley ratio is correct, and the fan is supplied with plenty of fresh air,
it should be able to be used with good results.
Fat Performance has used those style of shrouds and fans for years and their 3lt type 4s run for thousands of miles through the desert.

Last resort would be to move or enlarge the cooler,
but some times this is the only solution,
so it may be in the car's future.
westi wrote:That's mad Alan.

cnfabo Custom Title Time!

1,353 posts · joined Apr 2008 ·

#815507
ill get him to replace the sender and gauge and see what happens...and ill back the timing off....then we will go from here......thanks everyone....

oh and it has 39mm vents, well thats what it said on his tech sheet....

Bizarre Moderator The artist formerly known as blue74l

12,789 posts · joined Aug 2002 ·

#815518
for what it is worth ..................

If it has 39 vents then 4.2 x 39 = 163.8

I would be upping the mains to 165's
Futue te ipsum!!!

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 ·

#818846
So is this still running hot or is it all fixed now ?