Anyone ever Extrude hone stock cast iron manifolds?
11-16-2003, 07:02 PM
#2
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Yah, I haven't see too many guys do this mod. I'm not sure of the exact costs involved, but I was pretty sure that the most felt that the gains to be had weren't really worth the cost.
11-18-2003, 11:27 AM
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I've hand-hogged a set to port match them (removing
a squared-off lip that protrudes about 3/16" into the
port top and bottom). I think this is where the gains are
to be found. The casting except at the flanges is pretty
thin-wall and not bad looking as far as roughness. I don't
think Extrude-Hone can take off much material and still
keep wall strength against cracking. The late ('02)
manifolds I did look pretty reasonable other than the
ports and 1/2 hour of die grinder beats the EH price by
a fair bit of yardage.
a squared-off lip that protrudes about 3/16" into the
port top and bottom). I think this is where the gains are
to be found. The casting except at the flanges is pretty
thin-wall and not bad looking as far as roughness. I don't
think Extrude-Hone can take off much material and still
keep wall strength against cracking. The late ('02)
manifolds I did look pretty reasonable other than the
ports and 1/2 hour of die grinder beats the EH price by
a fair bit of yardage.
11-18-2003, 05:26 PM
#6
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Originally Posted by jimmyblue
I've hand-hogged a set to port match them (removing
a squared-off lip that protrudes about 3/16" into the
port top and bottom). I think this is where the gains are
to be found. The casting except at the flanges is pretty
thin-wall and not bad looking as far as roughness. I don't
think Extrude-Hone can take off much material and still
keep wall strength against cracking. The late ('02)
manifolds I did look pretty reasonable other than the
ports and 1/2 hour of die grinder beats the EH price by
a fair bit of yardage.
a squared-off lip that protrudes about 3/16" into the
port top and bottom). I think this is where the gains are
to be found. The casting except at the flanges is pretty
thin-wall and not bad looking as far as roughness. I don't
think Extrude-Hone can take off much material and still
keep wall strength against cracking. The late ('02)
manifolds I did look pretty reasonable other than the
ports and 1/2 hour of die grinder beats the EH price by
a fair bit of yardage.
With LT headers I know it would be worth about 25 to 30 more hp with the setup I have. I plan on getting headers soon so if you want to buy them off me I'll sell them.
11-19-2003, 02:55 PM
#7
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Originally Posted by Farmer2
With LT headers I know it would be worth about 25 to 30 more hp with the setup I have. I plan on getting headers soon so if you want to buy them off me I'll sell them.
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11-19-2003, 11:28 PM
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I think you'd be better off going at em with a grinder to clean em up and then having them coated. I picked some power up (101 stock 104 after ) just by cleaning out the pipes on my bike and having them coated.Cost me $150 to have a head pipe coated (I have a twin). Shouldn't be much more for a set of manifolds.Sent them and had em back in the same week.The difference in heat in the engine bay will be noticable too.
I am looking for a set of iron manifolds off an 01-02 and an aftermarket y that I can fiddle with and have coated until I can get the LT's I want. I am not spending $1000 on a set of headers only to have to buy another set when I build my new motor.
As it sits now I am planning on:
Worked stock manifolds,aftermarket offroad y with a good cat-back.
When I build the 400 I will most likely use headers and duals .
I am looking for a set of iron manifolds off an 01-02 and an aftermarket y that I can fiddle with and have coated until I can get the LT's I want. I am not spending $1000 on a set of headers only to have to buy another set when I build my new motor.
As it sits now I am planning on:
Worked stock manifolds,aftermarket offroad y with a good cat-back.
When I build the 400 I will most likely use headers and duals .
11-20-2003, 09:38 AM
#9
Originally Posted by Farmer2
I did the same. I have an 02 WS6 and did the port match and polish to the stockers. I just dynoed last week and with a 224/581, 114LSA cam I layed down 357.6 rwhp on a A4 and 346 rwtq.
With LT headers I know it would be worth about 25 to 30 more hp with the setup I have. I plan on getting headers soon so if you want to buy them off me I'll sell them.
With LT headers I know it would be worth about 25 to 30 more hp with the setup I have. I plan on getting headers soon so if you want to buy them off me I'll sell them.
11-22-2003, 08:00 PM
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Originally Posted by 99 Black Bird T/A
Yes, I'm interested...I'll PM you for details!
JaysZ you have the deatils also in a PM
