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post #1 of (permalink) Old 12-24-2003, 08:32 PM Thread Starter
 
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Putting in a new head

is there any thing I can have done or do my self gain some more power out of a rebuilt head?
1.3l btw.
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post #2 of (permalink) Old 12-24-2003, 08:49 PM
 
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Re: Putting in a new head

How good of condition is the bottom end? if its good, meaning near factory compression, quite a bit. If not,
rings and bearings at a minimum are probably in order. Otherwise you will probably lose the bottom end compression.

To maximize HP on a reletivly stock motor...

Check the Piston to deck clearance. Deck the block if it has the room. This increases the compression ratio
much higher than cutting the head.

Dial in (degree) the cam properly to the crank. This is much more than lining up the timing belt marks.
Espesially important if you decked either the head or block.

Match the intake and exhaust ports to the manifolds.

Port the head. Don't polish the intake runners.

Shim the distributor gear to dist housing clearance to about .005 of an inch.

If you can, replace the carb with a Weber and have Sarge work his magic to the intake at least.

Those basics will bring an engine to its best potential given minimal mods, cams, headers, etc.

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post #3 of (permalink) Old 12-24-2003, 09:04 PM
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Re: Putting in a new head

All you need to know [img]images/graemlins/burnout.gif[/img]
http://www.asianautopartsofaz.com/
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post #4 of (permalink) Old 12-24-2003, 09:28 PM Thread Starter
 
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Re: Putting in a new head

it had 150 in all cylinders, it has a miss and I've tryed everything and its still there so I'm thinking its a sticking valve.
I've been told I can't get a proper compression reading without a leakdown test becuase oil could be sliping past the rings and givng a false rating though I dont know if this is true or not.
the miss does not start intill the engine warms up witch points to the valve so I thought I would give a new head a try.
since Im going to have it apart I thought I might as well try to get a little boost out of it.
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post #5 of (permalink) Old 12-24-2003, 09:36 PM Thread Starter
 
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Re: Putting in a new head

if I shave down the head for more compresson how much should I do?
is there anyother tweaks?
I have the head so buying another is not going to happen.

thanks guys
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post #6 of (permalink) Old 12-25-2003, 01:19 AM
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Re: Putting in a new head

Don't forget the bolt through the neck and the zip up the back of the head.

Err, I see, it's zukenstein not frankenstein.
OK, here's my .02.
What Bill4rest and Outlaw said plus get a carb that flows some air. I use an SU and i am happy. No accelerator pump but it does fine. I opened up the 2 holes on the manifold into one big hole. Did some manifold cleaning up with a Dremel.
I aint done the big valves and port job yet, but the raised compression of the Gti pistons along with a Berg adjustable cam sprocket and a cam grind, bigger carb, freeflow etc have made a huge difference.
Waiting to go in are a crank scraper and a mr gasket crankcase evacuation system.
Sometime in 04 will be the big X valves and a polish etc.
A.
post #7 of (permalink) Old 12-25-2003, 07:38 AM
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Re: Putting in a new head

i would not go more than 10 thou an both the head and block. for every 10 thou you get roughly 1/2 a point compression.

while you do your port and rough polish on the head, have a machine shop drop in some track/kick intake and exhaust valves to get the flow rate up there.

but if you wnat all this to work, you are going to have to get all this new air out of the engine which meens a header and at least a 2"exhaust. just my opinion. from what i understand aap has the sumoII which has pretty much all of this done already.

Sesan,EH [img]images/graemlins/40BEER.gif[/img]
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post #8 of (permalink) Old 12-25-2003, 09:02 AM
 
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Re: Putting in a new head

Here's where I got my head.~ Made a BIG diferance
http://www.reynoldsmachine.com
1.6 intake and 1.6 stainless exhaust and torquer cam. I love it!!!!!!!
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post #9 of (permalink) Old 12-25-2003, 04:17 PM
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Re: Putting in a new head

Larry are you saying that you use a 1600 8valve inlet manifold and exhaust manifold ?

I have been told that the 1600 inlet manifold makes horses. Just can't seem to find one here.

A.
post #10 of (permalink) Old 12-25-2003, 05:25 PM
 
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Re: Putting in a new head

No it's not a 1.6 head or intake or exhust manifold it's all 1.3 but with a modified Head with 1.6 intake and exhaust valves and a torquer cam. follow the link I gave and you can get one there or there are other vender's that also sell them as well.
I've never heard of any one using 1.6 manifolds on a 1.3.
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