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Old 08-19-2003, 10:05 AM   #1
9
Scooby Newbie
 
Member#: 4074
Join Date: Feb 2001
Location: Charlottesville, Va
Vehicle:
1998 Impreza RS
RBP (one of the first!)

Default port and polish ?'s

Ok so somehow I had a spark plug fuse to the passenger side head and when I tried to get the plug out, the threads broke in half. So now I need to get the head off and take it to a machine shop. there is one in town that supposedly does good performance machine work, and I know they jsut don't do v8's and stuff. So my question is, can I take both heads to them and ask for a port and polish and they'll know what to do or do I need some spec's for them to go by? Also what kind of options do we have for upgraded valves and such? Thanks in advance.

Courtney
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Old 08-19-2003, 10:37 AM   #2
PARANOID56
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Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2003 Brocoma DCab
71 FJ40, 13 DRZ400SM

Default

most good shop will know what to do, but also bring in your intake manafold. That way they can match the ports (gasket match) you might also want to bring in your header to do the same thing. Or if you are feeling real do-it-yourself you can do it yourself with a die grinder
Shane
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Old 08-19-2003, 11:23 AM   #3
John*G
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Mud

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I am not positive but I think you want to leave a lip on the exhaust side. That is, the header should be larger than the exhaust port.
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Old 08-19-2003, 01:23 PM   #4
9
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1998 Impreza RS
RBP (one of the first!)

Default

interesting, so anyone know about valves??
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Old 08-20-2003, 12:30 AM   #5
dcoty
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Location: montreal quebec
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01 V7 GC/R32 sky

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Well, they will flow your head and get flow numbers...call cobb tuning and ask what their flow rates are on their heads to give the shop an idea of what can be done.

Bringing the inatke manifold is a good idea too.

As for valves...i would leave those alone for now, only mess with valves/springs and retainers when you raise the redline with a mean set of cams, otherwise its not worth the time and money. Trust me.

Anyway, what is you budget and how long can you be without your car? Because I have some suggestions while the motor is apart.

Good luck!

Dan
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Old 08-20-2003, 10:37 AM   #6
9
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1998 Impreza RS
RBP (one of the first!)

Default

Well, now that I think about it as much as I've been wanting to do this, (especially last time my engine was apart) I need to save money cause I'm moving from Virginia to Illinois soon, and I want to tow both of my cars to keep the miles down. But If I can get a second job I might go ahead and do some stuff now. Well I can be without my car until my 72 rustbucket VW breaks down, so... could be several months or a day or two. Yeah I've been on this board for several years now, and poor the whole time, so all I've done is plan what I want to do. I really want a spare 98 engine to work on slowly, That would be nice. So what are your seggestions?

Courtney
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Old 08-21-2003, 01:46 AM   #7
dcoty
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01 V7 GC/R32 sky

Default

Well, if you get a spare motor, just slowly hack away at it. Get the heads ported, add some agressive cams from cobb (as an example), and new valve springs and possible retainers (also from cobb as an example, thats where mine are from). Pick up a Unichip for a good price, raise the redline to 7,000-7,500 (and tune the sucker) and you have a fun little motor. But make sure the cams you get make power that high, otherwise you car will weeze out after the stock redline.

But it depends how much you are willing to do to the spare motor. You can lighten, balance and knife edge the crankshaft. This means less rorational mass, and more freed (<-- is that even a word??) up power.

BTW, this all is an option to do to your present motor while in the shop, but the crank wil rpobably cost because you have to open the block which isnt nesessary now.

But here is an idea. Just port the heads you have now at the shop, thats it. Then do as many of the reccomendations to the spare motor as you want (except the cams, valves and retainers, leave those on the table for later). When you are ready for the spare motor to be put in your car, swap the ported heads form your present motor to your spare motor, but only after you install the cams, valves and retainers into the ported heads. Then there you go. I hope this idea makes sense to you, it does save you money for now, and in the future.



Dan
Good luck on the move, moving is never fun. It sucked when i only moved to a different floor in my appt building!
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