Discussion
3 laps of VMAX = 175mph = head gasket failure....
Many thanks as always to Dave at Jetstream for picking me up from the bottom of the runway. Convenient breaking down 100yrds from them.
Cylinders full of coolant. Yet to take a close look to determine damage.
Any thoughts on what to do while the engine's in pieces are welcome.
Many thanks as always to Dave at Jetstream for picking me up from the bottom of the runway. Convenient breaking down 100yrds from them.
Cylinders full of coolant. Yet to take a close look to determine damage.
Any thoughts on what to do while the engine's in pieces are welcome.
markrichards said:
Not looking to spend huge amounts given the cost of the car year to date.
I reckon:
- Oil cooler
- Helix clutch
In addition to fixing the heads etc.
yep thats where it starts, then it will be ..hmm while doing the heads i may aswell do this..and if i'm going to do that i may aswell sort that at the same time...oh feck it sort it all ..I reckon:
- Oil cooler
- Helix clutch
In addition to fixing the heads etc.
...after all if your doing clutch you may aswell upgrade gearbox ..lolUnless you cut the chassis, the engine needs to come out to upgrade the clutch.
Do you already have the gearbox upgrades?
If you are not taking the engine out, the full race heads are about £600 + vat (well they were not too long ago), and the cams are about the same.
Even if you don't up the power, they will both take some heat & stress out of the engine as the turbos will not have to work quite so hard - but you would also need a remap.
Do you already have the gearbox upgrades?
If you are not taking the engine out, the full race heads are about £600 + vat (well they were not too long ago), and the cams are about the same.
Even if you don't up the power, they will both take some heat & stress out of the engine as the turbos will not have to work quite so hard - but you would also need a remap.
I can only pass on the advice I was given when specifying mine.
You can get heads that have been ported to let the engine breathe better and more efficiently. The full race heads go further and have more extensive porting right through to the manifold. Needed for 600bhp but also a good mod for 500 and may allow the turbos an easier time, thus keeping a bit of heat out of the engine.
Cams are again really only needed for 600bhp but are a nice mod for 500. Engine can rev higher and again will breathe better and more efficiently.
I have both and the car is still tractable at lower revs, but the cams can make it a little lumpy. Not a problem though.
The prices are for exchange units by the way.
Regards
Graham
You can get heads that have been ported to let the engine breathe better and more efficiently. The full race heads go further and have more extensive porting right through to the manifold. Needed for 600bhp but also a good mod for 500 and may allow the turbos an easier time, thus keeping a bit of heat out of the engine.
Cams are again really only needed for 600bhp but are a nice mod for 500. Engine can rev higher and again will breathe better and more efficiently.
I have both and the car is still tractable at lower revs, but the cams can make it a little lumpy. Not a problem though.
The prices are for exchange units by the way.
Regards
Graham
Iv'e not heard of race heads for a Noble, so am curious, normally this would mean PB valve guides(maybe re angled) recut 3 angle seats, one piece stainless or inconel valves, light weight retainers and a lot of porting. I thought all that people do for the Ford heads is a light clean up and flow?
Hi Adrian,
It's just what Dave called them, but I think he was only referring to the additional level of porting.
Maybe the description is a bit misleading, but they have much more than just a light clean up.
I think that the basic improvements are usually confined to a light clean up of the combustion chambers, but on these (which he also referred to as the 600 spec) there is a lot more work done and the porting goes all the way through to both the manifold faces, with the inlet ports also being opened up a bit too to match the lower manifolds.
Can't remember if it's a 3 or 5 angle valve cut - they're not just relapped though.
However, I didn't get the impression the valves, guides or retainers were any different. The springs are, obviously, but that's on top of the exchange head price.
Regards
Graham
It's just what Dave called them, but I think he was only referring to the additional level of porting.
Maybe the description is a bit misleading, but they have much more than just a light clean up.
I think that the basic improvements are usually confined to a light clean up of the combustion chambers, but on these (which he also referred to as the 600 spec) there is a lot more work done and the porting goes all the way through to both the manifold faces, with the inlet ports also being opened up a bit too to match the lower manifolds.
Can't remember if it's a 3 or 5 angle valve cut - they're not just relapped though.
However, I didn't get the impression the valves, guides or retainers were any different. The springs are, obviously, but that's on top of the exchange head price.
Regards
Graham
Edited by 951 on Monday 30th April 13:05
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