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| The MaDDeSTMaN |
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I'm seriously considering removing the iron head and replacing it with an alloy head, along with the XF carb setup and extractors. I'll also be upgrading the dizzy to a early XF (non EST) so I can kiss goodbye to the points dizzy.
I've read that the piston dish is different in the iron head crossflows compared to the alloy heads, and that swapping to a alloy head bumps up the compression. Just wondering if anyone can shed any more light on this. |
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| briney |
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i'm not sure about the piston dish, but i'm sure it wouldn't be much. why not bang it on and see ? the alloy head and manifold should be a huge improvement.
_________________ vote for pedro ? f**k pedro, f**k him up his stupid a***hole. |
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| The MaDDeSTMaN |
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briney wrote: i'm not sure about the piston dish, but i'm sure it wouldn't be much. why not bang it on and see ? the alloy head and manifold should be a huge improvement. I'm going to anyway, I'm sure it will be a huge improvement, just not sure if it'll raise the compression enough to make it require 98 fuel or not, that's all.
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| SleeperEL |
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They SHOULD be run on premium anyway considering up to series 1 XF they were meant to. Other than that you shouldnt have any hassles.
While you've got your alloy head off the car, why not take it down to the local head shop & get them to do the valve seats in it so it can run on regular?? Maybe even get some other headwork done like springs, hone etc etc. |
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| cjh |
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SleeperEL wrote: They SHOULD be run on premium anyway considering up to series 1 XF they were meant to. Other than that you shouldnt have any hassles.
While you've got your alloy head off the car, why not take it down to the local head shop & get them to do the valve seats in it so it can run on regular?? Maybe even get some other headwork done like springs, hone etc etc. Get an 87 model XF cyl head from the wreckers, its unleaded already, just overhaul it.
_________________ http://youtu.be/jJTh9F3Vgg0 |
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| Nigel |
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Thoughts of the day.
1. The alloy head 4.1's have two dowels to locate the head to stop them from moving around. You cant put them on a steel head block easily. Alloy head on works ok, but you may get issues with the head gasket. 2. From memory there is a water passage that is or isnt... I dont think it mattered. 3. The dizzy - The later ones (electronic) had a different shaft size. You may be ok depending on the year of your engine. I dont believe it will just fit properly. Have you thought about just picking up a complete engine? - if we can get AU ones for $100-200, then surely XF engines arent expensive. You'll also get one for ULP then Nigel |
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| cjh |
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Nigel wrote: Thoughts of the day.
1. The alloy head 4.1's have two dowels to locate the head to stop them from moving around. You cant put them on a steel head block easily. Alloy head on works ok, but you may get issues with the head gasket. 2. From memory there is a water passage that is or isnt... I dont think it mattered. 3. The dizzy - The later ones (electronic) had a different shaft size. You may be ok depending on the year of your engine. I dont believe it will just fit properly. Have you thought about just picking up a complete engine? - if we can get AU ones for $100-200, then surely XF engines arent expensive. You'll also get one for ULP then Nigel True that ^^^^. Get an engine that has "86DA" on the passenger side of the block.
_________________ http://youtu.be/jJTh9F3Vgg0 |
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| longlivethefalcon |
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Yep water jackets are different.
Id just look for an XF unleaded motor and slide her. I have an XF unleaded block (no extras, no head) if you want it you can have it. West of Melbourne.
_________________ Mk2 Zephyr |
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| xr8 dismantler |
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cjh wrote: Nigel wrote: Thoughts of the day. 1. The alloy head 4.1's have two dowels to locate the head to stop them from moving around. You cant put them on a steel head block easily. Alloy head on works ok, but you may get issues with the head gasket. 2. From memory there is a water passage that is or isnt... I dont think it mattered. 3. The dizzy - The later ones (electronic) had a different shaft size. You may be ok depending on the year of your engine. I dont believe it will just fit properly. Have you thought about just picking up a complete engine? - if we can get AU ones for $100-200, then surely XF engines arent expensive. You'll also get one for ULP then Nigel True that ^^^^. Get an engine that has "86DA" on the passenger side of the block. 84da can be unleaded aswell. best to look at the casting on the side of the head E1 is EFI leaded E2 is EFI ULP C1 is Carby leaded C2 is carby ULP the 86da blocks were more used in the late 87 xf's and in the late utes/vans. the 86DA blocks also use the same crank as a EA and uses the EA flywheel on them. |
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| The MaDDeSTMaN |
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Nigel wrote: 1. The alloy head 4.1's have two dowels to locate the head to stop them from moving around. You cant put them on a steel head block easily. Alloy head on works ok, but you may get issues with the head gasket. I've got a complete XF engine here, but the head needs to come off anyway on that because it's done the head gasket. I could always just rebuild that engine, and may end up doing that, but it never hurts to look at all the available options does it? 2. From memory there is a water passage that is or isnt... I dont think it mattered. 3. The dizzy - The later ones (electronic) had a different shaft size. You may be ok depending on the year of your engine. I dont believe it will just fit properly.Have you thought about just picking up a complete engine? - if we can get AU ones for $100-200, then surely XF engines arent expensive. You'll also get one for ULP then Nigel 
I know about the water galleries and locating dowels, neither of which are an issue, water galleries are close enough it makes no difference (compare an iron head crossflow headgasket to an alloy head one), and my understanding is that the iron head block doesn't have the locating dowel like the alloy head block does, which is no problem looking at these pics I took... 
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