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bren_1.3

106 Xsi Cylinder Head

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bren_1.3

is it possible to reshape the protusion of the valve guide that reaches into the port? it looks thick enough to have some reprofiling done. i know shenpar remove all of the valve guide that protudes into the port. it was mentioned on here a while ago.

 

does anyone have any thoughts on its ports? any pointers? they look big enough for the valve size to me.

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axnutty

Yes you can profile the valve guide so its smooth with the throat.

 

The inlet side is already very good. I generally just remove the castings marks and any slight differences on the ports. As for the exhaust side I find theres quite a lot of work that can be done as they are fairly small in comparison.

 

Theres also a small hump that can be removed I think. Its been sometime since I looked at the injection heads - but there definetly is in the carb'd GT heads.

 

The valve sizes are pretty good to start with. Much much bigger than the carb'd heads again. I have had bigger valves fitted in the past but it depends how far you want to go obviously.

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christopher
Yes you can profile the valve guide so its smooth with the throat.

 

The inlet side is already very good. I generally just remove the castings marks and any slight differences on the ports. As for the exhaust side I find theres quite a lot of work that can be done as they are fairly small in comparison.

 

Theres also a small hump that can be removed I think. Its been sometime since I looked at the injection heads - but there definetly is in the carb'd GT heads.

 

The valve sizes are pretty good to start with. Much much bigger than the carb'd heads again. I have had bigger valves fitted in the past but it depends how far you want to go obviously.

 

 

Bren there is a tiny bit of flow to be had with removing the guide in the port. I however am going with a reshaped guide. You might it very difficult to re-cut the seat at a later date if you remove this.

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bren_1.3

reshaped guide it is!

 

Yes you can profile the valve guide so its smooth with the throat.

 

The inlet side is already very good. I generally just remove the castings marks and any slight differences on the ports. As for the exhaust side I find theres quite a lot of work that can be done as they are fairly small in comparison.

 

Theres also a small hump that can be removed I think. Its been sometime since I looked at the injection heads - but there definetly is in the carb'd GT heads.

 

The valve sizes are pretty good to start with. Much much bigger than the carb'd heads again. I have had bigger valves fitted in the past but it depends how far you want to go obviously.

 

how much bigger is bigger? i believe theyre bigger than the TU24 valves as standard. and how much would a set cost? who does them? yourself?

 

i thought about making the short side bend a bit smoother, its dips quite viciously.

 

Bren there is a tiny bit of flow to be had with removing the guide in the port. I however am going with a reshaped guide. You might it very difficult to re-cut the seat at a later date if you remove this.

 

duly noted. if only flow benches werent so much money :D

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