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Underbody braces, turbos and more!

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 Post subject: poor high end
PostPosted: Wed Aug 11, 2004 10:16 am 
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Joined: Wed Aug 11, 2004 10:11 am
Posts: 4
Location: Singapore
I just had a engine swap. The low end improve in term of torque but the end high seems poor. Checked timing to be in the 20over deg.. Tried getting it lower but car no power. Engine also sound very rough. Tested compression to be fine and same pressure on all 4 cylinder.


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 Post subject:
PostPosted: Wed Aug 11, 2004 7:33 pm 
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Joined: Sat May 22, 2004 2:13 am
Posts: 29
Location: Vancouver Canada
cultus_gti
From what size engine to what size engine or were they the same displacement?
Type -single or double overhead cam?
Did you use the old exhaust (original engine)
Buy any chance did you have the t-belt off?

SEA#3[


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 Post subject:
PostPosted: Thu Aug 12, 2004 3:40 am 
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Joined: Wed Aug 11, 2004 10:11 am
Posts: 4
Location: Singapore
same g13b..
change new SGP timing belt.
used back same eshaust..
Dohc..


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 Post subject:
PostPosted: Thu Aug 12, 2004 8:57 pm 
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Joined: Sat May 22, 2004 2:13 am
Posts: 29
Location: Vancouver Canada
cultus_gti
I would go back and check your t-belt timing marks. It sounds like you have one of the cams off a tooth or lined up the wrong mark on the wrong cam (possibly the exhaust cam that drives the distributor) since it won’t properly
set up on the ignition timing
SEA#3


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 Post subject:
PostPosted: Fri Aug 13, 2004 2:34 pm 
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Joined: Wed Aug 11, 2004 10:11 am
Posts: 4
Location: Singapore
No past reference.. If worst come to worst anyway to redo everything.. as in take out the belt, reset the cam and reinstall the belt?? i thought its the intake cam that drive the distributor rotor??


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 Post subject:
PostPosted: Sat Aug 14, 2004 11:07 am 
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Joined: Tue Jul 20, 2004 7:17 pm
Posts: 3566
Location: Georgetown, Guyana
cultus_gti wrote:
i thought its the intake cam that drive the distributor rotor??


It is


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 Post subject:
PostPosted: Sat Aug 14, 2004 11:16 am 
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Joined: Wed Aug 11, 2004 10:11 am
Posts: 4
Location: Singapore
so how can i redo the belt installation and make sure its seated correctly??


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 Post subject:
PostPosted: Sat Aug 14, 2004 12:45 pm 
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Joined: Tue May 07, 2002 10:55 am
Posts: 383
Location: Cobble Hill, B.C.
You should reposition the belt. You might be able to do it without removing the lower timing belt cover but I'm not sure because you may find it difficult without loosening the tensioner. Make sure the "I" on the intake sprocket and the "E" on the exhaust one point to marks on the top of the engine and that the 0 degree mark on the lower cover lines up with the notch/line on the alt pulley if you have the cover on. If it is off there is a dot on the pulley that needs to be lined up with a raised arrow on the block above the pulley.


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 Post subject:
PostPosted: Thu Aug 19, 2004 2:04 am 
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Joined: Tue Jun 15, 2004 11:20 am
Posts: 72
Location: Vancouver B.C.
If it doesnt turn out to be any of those things check your vacuum advance pot and o2 sensor.I drive a 90 fly and the vacuum pot was toast.That engine shook so bad my mufler was moving 4 5 inches back and forth. I got a new o2 sensor and vacuum advance pot and it smoothed it out significantly.


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 Post subject:
PostPosted: Thu Aug 19, 2004 2:07 am 
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Joined: Tue Jun 15, 2004 11:20 am
Posts: 72
Location: Vancouver B.C.
Oh and a good way to test the vacuum pot is to disconect the vacuum hoses from the pot. If nothin happens its garbage, If the idle gets worse its fine and i should shut up.


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 Post subject:
PostPosted: Thu Aug 19, 2004 6:31 am 
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Joined: Thu Feb 12, 2004 11:30 pm
Posts: 1706
Location: Rivendell
this may help..

Image

_________________
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.HP is how fast you hit the wall, torque is how much you push the wall out.


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