Neadles
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| posted on 4/7/15 at 07:16 AM |
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919 Fury Blade problems when hot
So I'm look to the vast wealth of knowledge to help me as old carb engines are not my specialty!
When on track all is fine until oil temp rises above 105 ish, from then on the engine struggles and will not rev out past 6-7k it just sputters and
spits with no power. Once cooled again its ok for a while until oil temps rise again. Water temp is steady and I had it tuned at Daytuner the
beginning of the year but once on track and not the road its not great.
Can any one explain what is really going on, all I can think is the fuel in the float bowls might be flashing off and not allowing enough to be drawn
into the cylinders but that's just a guess, there's obviously an air/fuel problem occuring.
I think I will just have to fit an oil cooler and hope that sorts the problem unles anyone has some pearls of wisdom because its beyond my experience.
Cheers
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jeffw
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| posted on 4/7/15 at 07:35 AM |
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Oil cooler and some form of cold air feed. Check the Rad is working correctly (fan is the right way round) and try looking at some vents on the rear
of the bonnet to let the hot air out.
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Neadles
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| posted on 4/7/15 at 09:54 AM |
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Thanks Jeff, I've cut some bigger holes at the back. I tried the cold air feed which overpressurised the engine bay and affect air flow through
the radiator and caused watrr temps to go up.
I think oil cooler is the only solution.
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ceebmoj
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| posted on 4/7/15 at 10:04 AM |
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As you have a screen on your car depending on where the vents are you might be trying to vent out in to a high pressure area. You can make a minomitor
with some clear tube, water and food colouring to see how the vent in the bonnet is performing. I was surprised by how much I learnt doing this on my
car.
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Neadles
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| posted on 4/7/15 at 11:09 AM |
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The vents are on the side as I have a manometer and looked into the pressure regions. I might try a cold air feed and remove the floor to allow the
air to escape and see what happens.
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jeffw
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| posted on 4/7/15 at 04:25 PM |
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I meant cold air feed to the intake....
Oil cooler will help, try and open some holes above the exhaust as well.
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jossey
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| posted on 5/7/15 at 07:09 AM |
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Which oil cooler you going for? And how are you plumbing it in?
Thanks
David Johnson
Building my tiger avon slowly but surely.
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Neadles
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| posted on 5/7/15 at 07:23 AM |
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Well I've started having a look not sure which is the best way to go, air or water cooler.
I'll phone Think Auto I think for some better infotmation.
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jossey
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| posted on 5/7/15 at 07:36 AM |
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I think water cooled is better if your water temps are fine and the rad can cope.
Let me know as I have the same engine and want one.
I just couldn't work out where to fit it onto using an after market cooler.
Thanks
David Johnson
Building my tiger avon slowly but surely.
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Neadles
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| posted on 5/7/15 at 07:47 AM |
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Yea sure I'll let you know what I go for.
[Edited on 5/7/15 by Neadles]
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jossey
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| posted on 5/7/15 at 08:44 AM |
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Thanks
Thanks
David Johnson
Building my tiger avon slowly but surely.
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mark chandler
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| posted on 5/7/15 at 09:06 AM |
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These engines are very sensitive to fuel mixture, I would try raising the needles by a notch, when it was rolling roaded was it in a very hot room?
Aftermarket cooler use a take off plate in place of the original water cooler.
 
In situ with pipes
 
Height comparison
 
Oil cooler in place
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Matt21
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| posted on 7/7/15 at 06:36 AM |
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My father in law is having the same issues with his fury blade.
Like you say, it runs fine until it gets hot.
Does anyone know whats actually happening to cause the stuttering other than, 'something is getting too hot'?
My indy has never had this problem with the same engine which seems odd
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adithorp
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| posted on 7/7/15 at 09:50 AM |
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Sounds to me like the fuel is boiling in the float chambers. What is your intake arrangement... sausage filter under the bonnet? Cold air feed to the
intakes is the simplest solution.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Matt21
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| posted on 15/7/15 at 01:07 PM |
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His has a sausage filter, I think the bonnet actually squashes it down a bit too as it is tight on space.
I'll tell him to get some cold air feeds run in to cool the intake area down
His has no bonnet vent whereas my indy has the bulge and vent on the front allowing the cool air to hit the filter and carbs... so makes sense!
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adithorp
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| posted on 15/7/15 at 02:04 PM |
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On the Indy most of the exhaust manifold is external as well, where on the Fury most of the heat from that is trapped under the bonnet.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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