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 cnfabo
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| posted on November 29th, 2010 at 11:36 PM |
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2332 porsche fan shroud cooling issues..
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.....
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 vw54
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| posted on November 30th, 2010 at 05:50 AM |
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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
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cnfabo
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| posted on November 30th, 2010 at 08:14 AM |
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| Quote: | Originally
posted by vw54
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...
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Craig Torrens
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| posted on November 30th, 2010 at 08:16 AM |
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what A/F ratio is it running ?
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 matberry
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| posted on November 30th, 2010 at 08:33 AM |
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| Quote: | Originally
posted by Craig Torrens
what A/F ratio is it running ?
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x2
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empi
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| posted on November 30th, 2010 at 04:46 PM |
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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  |
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RISKY4LIFE
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| posted on November 30th, 2010 at 05:42 PM |
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| Quote: | Originally
posted by Craig Torrens
what A/F ratio is it running ?
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this might sound silly but what is A/F??
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reub
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| posted on November 30th, 2010 at 07:28 PM |
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um....air/fuel ratio?
Reub
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vlad01
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| posted on November 30th, 2010 at 08:59 PM |
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"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 |
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reub
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| posted on November 30th, 2010 at 09:33 PM |
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sharpbuilt shroud - considered to be the best on the market.
Alan also installed the porsche factory air deflector to help overcome hotspots...
Reub
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Newt
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| posted on November 30th, 2010 at 11:33 PM |
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EFI or Carby?
It is as it is - If you didnt enjoy today, you've missed the opportunity.
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vlad01
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| posted on December 1st, 2010 at 06:58 AM |
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One word!
DTM
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE |
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matberry
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| posted on December 1st, 2010 at 07:13 AM |
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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
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Craig Torrens
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| posted on December 1st, 2010 at 11:56 AM |
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Didn't Alan have the same heat problem when the car was in QLD ?
http://forums.aussieveedubbers.com/viewtopic.php?tid=82195&page=4
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cnfabo
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| posted on December 1st, 2010 at 12:09 PM |
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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??
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vw54
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| posted on December 1st, 2010 at 12:50 PM |
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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
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cnfabo
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| posted on December 1st, 2010 at 01:20 PM |
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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.....
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matberry
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| posted on December 1st, 2010 at 01:26 PM |
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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
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1303Steve
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| posted on December 1st, 2010 at 01:41 PM |
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Hi
As Matt said, also make sure that the sender is the correct one for that gauge.
Steve
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cnfabo
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| posted on December 2nd, 2010 at 10:10 PM |
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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....
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hellbugged
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| posted on December 2nd, 2010 at 10:17 PM |
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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.......
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hellbugged
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| posted on December 2nd, 2010 at 10:47 PM |
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http://forums.aussieveedubbers.com/viewtopic.php?tid=82195&page=4
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matberry
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| posted on December 2nd, 2010 at 11:32 PM |
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Where's the temp sender....altho I agree, sounds too hot 
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
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cnfabo
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| posted on December 3rd, 2010 at 08:07 AM |
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| Quote: | Originally
posted by matberry
Where's the temp sender....altho I agree, sounds too hot
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its tapped into that plate that sits to the right and down a bit of the oil pump....its a vdo sender with gauge.....
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matberry
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| posted on December 3rd, 2010 at 09:05 AM |
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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.
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dangerous
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| posted on December 3rd, 2010 at 04:17 PM |
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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.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
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| posted on December 3rd, 2010 at 04:34 PM |
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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.
| Quote: | Originally
posted by westi
That's mad Alan.
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cnfabo
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| posted on December 3rd, 2010 at 11:26 PM |
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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....
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Bizarre
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| posted on December 4th, 2010 at 06:50 AM |
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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
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Craig Torrens
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| posted on December 29th, 2010 at 09:00 AM |
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So is this still running hot or is it all fixed now ?
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